1,022 results on '"Yonghua, Li"'
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2. Characteristics and cause analysis of summer precipitation conversion rate in eastern Southwest China
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Chuhan LU, Dingan HUANG, Yujing QIN, Yonghua LI, and Bo XIANG
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eastern southwest china ,moisture content ,precipitation conversion rate ,terrain sensitivity test ,numerical simulation ,Meteorology. Climatology ,QC851-999 - Abstract
Using CN05.1 and ECMWF Reanalysis v5 (ERA5) data, the characteristics of precipitation, water vapor content and precipitation conversion rate in eastern Southwest China (ESWC) during the summer of 1961-2020 were analyzed, and the influence of terrain distribution on the spatial distribution difference of precipitation conversion rate was preliminarily explored by means of synoptic analysis. Finally, the mesoscale numerical Weather Research and Forecasting Model (WRF4.0) was used to design terrain sensitivity tests to verify the effect of terrain on summer precipitation in the ESWC. The results are as follow. (1) In the summer of 1961-2020, the precipitation in the ESWC shows the characteristics of more precipitation in the east and less precipitation in the west, but there are two large value areas of water vapor content in the southeast and northwest of ESWC. The precipitation conversion rate in the large value area of water vapor is low, and the distribution of the strong precipitation area and the large value area of water vapor content are significantly different. By analyzing the situation of heavy precipitation areas in conjunction with horizontal wind fields and vertical velocity fields, it is found that topographic distribution is an important factor leading to this difference. (2) WRF model can well reflect the characteristics of summer precipitation in the ESWC. The terrain sensitivity test shows that the southwest to northeast mountain terrain distribution consisting of Dalou Mountain, Fangdou Mountain and Daba Mountain has a significant impact on the intensity of precipitation, and the decrease of terrain height will lead to a significant decrease of precipitation in the southeastern part of the region. (3) In particular, after reducing the topographic height of the region by half and to 0, respectively, the precipitation in the southeast of the region will decrease by 9.89% and 19.90% respectively on the monthly time scale. The change of topographic height will also cause the change of vertical velocity, horizontal wind field, water vapor transport and water vapor convergence, which will lead to the change of precipitation intensity. When the terrain height decreases, the upward motion and the southwest wind will weaken obviously, and the intensity of water vapor transport and water vapor convergence will decrease, which is not conducive to the formation of precipitation.
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- 2024
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3. Discussion on Magnetic Resonance Compatibility of Implantable Brain-Computer Interface Devices
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Kaixiang JIN, Xun LIU, Sheng HU, Yonghua LI, Yuetong WU, Jiaxing LI, and Chenghuai MO
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implantable brain computer interface ,magnetic resonance compatibility ,materials and structure ,supervision laws and regulations ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Medical technology ,R855-855.5 - Abstract
Brain-computer interface (BCI) devices are crucial tools for neural stimulation and recording, offering broad prospects in the diagnosis and treatment of neurological disorders. Furthermore, magnetic resonance imaging (MRI) is an effective and non-invasive technique for capturing whole-brain signals, providing detailed information on brain structures and activation patterns. Integrating the neural stimulation/recording capabilities of BCI devices with the non-invasive detection function of MRI is considered highly significant for brain function analysis. However, this combination imposes specific requirements on the magnetic and electronic performance of neural interface devices. The interaction between BCI devices and MRI is initially explored. Subsequently, potential safety risks arising from their combination are summarized and organized. Starting from the source of these hazards, such as the metallic electrodes and wires of BCI devices, the issues are analyzed, and current research countermeasures are summarized. In conclusion, the regulatory oversight of BCI's magnetic resonance safety is briefly discussed, and suggestions for enhancing the magnetic resonance compatibility of related BCI devices are proposed.
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- 2024
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4. Investigation of Coupling Effect for Adjacent Orthopedic Implants on MRI Radio-Frequency Heating
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Ran GUO, Zhichao WANG, Jing WANG, Chengling LI, Yonghua LI, and Sheng HU
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finite-difference time domain ,huygens source ,magnetic resonance imaging ,orthopedic implants ,radio-frequency heating ,coupling effect ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Medical technology ,R855-855.5 - Abstract
This paper investigates the mechanism of radio-frequency (RF) heating that occurs when two adjacent orthopedic implants are present together under magnetic resonance imaging (MRI) at 1.5 Tesla and 3.0 Tesla. When a patient has multiple implants close to each other, interactions between the implants may increase RF heating. Typical generic interlocking plate and antibiotic nail implants are adopted as examples. To analyze the effect of adjacent implants, the amplitude and direction of incident and scattering vector electric fields at the hot spot position are calculated and extracted using numerical simulation based on Huygens principle. It is shown that a strong coupling effect occurs due to the existence of both the incident field and a strong scattering field. Huygens principle can be used to obtain the first and second order scattering fields generated between implants. If the first- and second-order electric field terms are summed within a certain region, the RF-induced heating of this dual-implant system increases.
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- 2024
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5. Subtracting the background by reducing cell-free DNA’s confounding effects on Mycobacterium tuberculosis quantitation and the sputum microbiome
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Charissa C. Naidoo, Rouxjeane Venter, Francesc Codony, Gemma Agustí, Natasha Kitchin, Selisha Naidoo, Hilary Monaco, Hridesh Mishra, Yonghua Li, Jose C. Clemente, Robin M. Warren, Leopoldo N. Segal, and Grant Theron
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PEMAX ,Propidium monoazide ,DNaseI ,Mycobacterium tuberculosis ,Xpert MTB/RIF ,Sputum microbiome ,Medicine ,Science - Abstract
Abstract DNA characterisation in people with tuberculosis (TB) is critical for diagnostic and microbiome evaluations. However, extracellular DNA, more frequent in people on chemotherapy, confounds results. We evaluated whether nucleic acid dyes [propidium monoazide (PMA), PEMAX] and DNaseI could reduce this. PCR [16S Mycobacterium tuberculosis complex (Mtb) qPCR, Xpert MTB/RIF] was done on dilution series of untreated and treated (PMA, PEMAX, DNaseI) Mtb. Separately, 16S rRNA gene qPCR and sequencing were done on untreated and treated sputa before (Cohort A: 11 TB-negatives, 9 TB-positives; Cohort B: 19 TB-positives, PEMAX only) and 24-weeks after chemotherapy (Cohort B). PMA and PEMAX reduced PCR-detected Mtb DNA for dilution series and Cohort A sputum versus untreated controls, suggesting non-intact Mtb is present before treatment-start. PEMAX enabled sequencing-based Mycobacterium-detection in 7/12 (58%) TB-positive sputa where no such reads otherwise occurred. In Cohort A, PMA- and PEMAX-treated versus untreated sputa had decreased α- and increased β-diversities. In Cohort B, β-diversity differences between timepoints were only detected with PEMAX. DNaseI had negligible effects. PMA and PEMAX (but not DNaseI) reduced extracellular DNA in PCR and improved pathogen detection by sequencing. PEMAX additionally detected chemotherapy-associated taxonomic changes that would otherwise be missed. Dyes enhance microbiome evaluations especially during chemotherapy.
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- 2024
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6. Receiver function imaging based on short-period dense array reveals the uplift mechanism of the Altyn Tagh Mountains
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Yonghua Li
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Geophysics. Cosmic physics ,QC801-809 ,Astrophysics ,QB460-466 - Published
- 2025
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7. Effect of the combination of nitrapyrin and gamma-aminobutyric acid on soil nitrogen transformation characteristics and rice yield
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Furong Xiao, Chen Feng, Dongpo Li, Lili Zhang, Yonghua Li, Yandi Du, Yan Xue, Ping Gong, Yuchao Song, Ke Zhang, and Yiji Zhang
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yield increase limitations ,biostimulant ,nutrition ,nitrogen use efficiency ,agronomic benefits ,Plant culture ,SB1-1110 - Abstract
When 2-chloro-6-(trichloromethyl) pyridine (nitrapyrin) is applied alone, it typically does not significantly increase crop yield. Therefore, we combined gamma-aminobutyric acid (GABA) with nitrapyrin to address the limitations of nitrapyrin in enhancing yield. We conducted indoor incubation experiments and pot experiments in Chernozem and Calcic Kastanozem, respectively. The results demonstrated that GABA exerted an influence on the effectiveness of nitrapyrin by altering its degradation rate. In Chernozem, GABA accelerated nitrapyrin degradation, whereas, in Calcic Kastanozem, the results were the opposite. The pot experiment results showed that the combination of nitrapyrin and GABA increased rice total biomass by 5%, grain yield by 18 ± 2%, and plant nitrogen (N) uptake by 9 ± 1% compared to nitrapyrin applied alone. The increase in yield was attributed to the combined effect of nitrapyrin and GABA, which elevated root biomass and leaf area. In contrast, the effect of GABA on yield through altering the degradation rate of nitrapyrin was weaker. Therefore, the combination of nitrapyrin and GABA combined with urea increases rice yields in Chernozem and Calcic Kastanozem. The aim of this endeavour was to foster the development of a novel fertiliser product that offers both favourable agronomic outcomes and environmental benefits.
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- 2024
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8. Numerical simulation and theoretical study on the impact of wind-sand flow of high-speed trains in long tunnel space
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Shiqun Li, Sihui Dong, Yonghua Li, and Liping Zhou
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HST ,3D ,DDES ,High wind ,Sand ,Long tunnel infrastructure (HWS ,LT) ,Flow and heat transfer ,Correlation models ,Medicine ,Science - Abstract
Abstract When high-speed trains (HST) run in enclosed spaces such as long tunnels, the thermal accumulation of their suspension devices is continuous and cannot be effectively dissipated. In addition, previous experiments or simulations for the heat dissipation of HST in tunnel spaces did not consider the impact of sand. To clarify the impact of HWS-LT on the heat accumulation of HST equipment cabin, this study used the CFD method to numerically simulate the impact of different wind-sand flow concentrations or no-sand wind on the cooling of equipment in the long tunnel space. Firstly, the sand particles in the wind-sand flow gather at the tunnel entrance and enter the equipment cabin with the train as it enters the tunnel. This boundary condition is more in line with actual engineering situations. Secondly, both flows show asymmetric intrusion into the cabin due to the asymmetrical tunnel arrangement, but the sand particles in the wind-sand flow are affected by the vortices and tunnel walls, resulting in more asymmetric flow and some particles being trapped in the grids or filters, leading to outflow ρ Q
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- 2024
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9. Applying the driver-pressure-state-impact-response model to ecological restoration: A case study of comprehensive zoning and benefit assessment in Zhejiang Province, China
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Song Yao, Yonghua Li, Xiangyang Quan, and Jiren Xu
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Ecological restoration ,DPSIR model ,Zoning delineation ,Restoration benefit assessment ,Zhejiang Province ,Ecology ,QH540-549.5 - Abstract
Ecosystem degradation is a global problem that poses a significant threat to the sustainable development of human societies, particularly in developing countries, such as China. In response, China has implemented a series of ecological restoration (ER) policies over recent years. However, significant regional developmental disparities, pronounced spatial heterogeneity of ecological issues, and substantial historical debt for ER in China present considerable obstacles and financial burdens to the effective implementation of ER strategies. Delineating ER zones and assessing the ER benefits are essential for developing effective ER strategies and implementing ER projects. In this study, we constructed a comprehensive framework for ER utilizing the Driver-Pressure-State-Impact-Response (DPSIR) model, quantified the urbanization levels, ecological state, and restoration costs in Zhejiang Province to delineate ER zones, integrated the patch-generating land use simulation model with the ecosystem service value assessment method to quantify the benefits of ER, and ultimately developed tailored ER strategies. The results showed that: (1) The pattern of urbanization levels was characterized by high levels in the northeast and low levels in the southwest, which constrated with the ecological state. The areas of high restoration costs were located in the northeastern and southeastern regions, and the areas of low restoration costs were situated in the southwestern region. (2) The rate of construction land expansion is significantly curtailed under the ER scenario compared to the natural development scenario in 2035, while forest areas have seen effective protection and an increase from the levels of 2020. (3) The ER policy is projected to generate ecological benefits totaling CNY 8.23 billion by 2035, substantially reducing the rate of ecosystem degradation. (4) Zhejiang Province is divided into five zones at the county scale: ecological autonomous protection zone, ecological core protection zone, ecological priority restoration zone, ecological control zone, and moderate development zone. Strategies have been devised based on the forecasted benefits of ER, offering valuable insights into ecological management. These findings aim to enhance the understanding of ER and support the development and implementation of regional ecological policies.
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- 2024
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10. Non-native species in marine protected areas: Global distribution patterns
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Tianjian Song, Yuxin Huang, Lei Fang, Yonghua Li, Junsheng Li, and Jiang Chang
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Distribution patterns ,Effect factors ,Marine protected areas ,Non-native species ,Environmental sciences ,GE1-350 ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Marine protected areas (MPAs) across various countries have contributed to safeguarding coastal and marine environments. Despite these efforts, marine non-native species (NNS) continue to threaten biodiversity and ecosystems, even within MPAs. Currently, there is a lack of comprehensive studies on the inventories, distribution patterns, and effect factors of NNS within MPAs. Here we show a database containing over 15,000 occurrence records of 2714 marine NNS across 16,401 national or regional MPAs worldwide. To identify the primary mechanisms driving the occurrence of NNS, we utilize model selection with proxies representing colonization pressure, environmental variables, and MPA characteristics. Among the environmental predictors analyzed, sea surface temperature emerged as the sole factor strongly associated with NNS richness. Higher sea surface temperatures are linked to increased NNS richness, aligning with global marine biodiversity trends. Furthermore, human activities help species overcome geographical barriers and migration constraints. Consequently, this influences the distribution patterns of marine introduced species and associated environmental factors. As global climate change continues to alter sea temperatures, it is crucial to protect marine regions that are increasingly vulnerable to intense human activities and biological invasions.
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- 2024
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11. Impact of atmospheric particulate matter retention on physiological characters of five plant species under different pollution levels in Zhengzhou
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Dan He, Jiangqin Yuan, Runze Lin, Dongbo Xie, Yifei Wang, Gunwoo Kim, Yakai Lei, and Yonghua Li
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Landscape plants ,Air pollution ,Particulate matter ,Dust retention ,Physiological response ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Atmospheric particulate matter (PM) pollution has become a major environmental risk, and green plants can mitigate air pollution by regulating their enzymatic activity, osmoregulatory substances, photosynthetic pigments, and other biochemical characteristics. The present investigation aims to evaluate the mitigation potential of five common evergreen tree species (Photinia serrulata, Ligustrum lucidum, Eriobotrya japonica, Euonymus japonicus, Pittosporum tobira) against air pollution and to assess the effect of dust retention on plant physiological functions exposed to three different pollution levels (road, campus, and park). The results found that the amount of dust retained per unit leaf area of the plants was proportional to the mass concentration of atmospheric particulate matter in the environment, and that dust accumulation was higher on the road and campus than in the park. There were significant differences in dust retention among the five tree species, with the highest leaf dust accumulation observed for E. japonica (5.45 g·m−2), and the lowest for P. tobira (1.53 g·m−2). In addition, the increase in PM adsorption by different plants was uneven with increasing pollution levels, with significant decreases in chlorophyll content, photosynthetic and transpiration rate. From a physiological perspective, P. tobira exhibited greater potential to respond to PM pollution. Biochemical indicators suggested that PM pollution caused changes in plant protective enzyme activities, with a decrease in superoxide dismutase (SOD) and peroxidase (POD) activities, as well as promoting membrane lipid peroxidation, and appropriate stress also enables plants to counteract oxidative damage. In particular, PM exposure also induced stomatal constriction. Overall, PM retention was significantly associated with physiological and photosynthetic traits. In conclusion, our study contributes to the understanding of the effects of PM on plant physiology. Furthermore, it also provides insights into the selection of plants that are tolerant to PM pollution.
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- 2024
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12. Research on Construction of Test Environment for Assessment of RF-Induced Heating Effects of Implants
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Yonghua LI, Lingfeng LU, Jing WANG, Chengling LI, Pengfei YANG, Zhichao WANG, Dajing WU, Xun LIU, and Sheng HU
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implants ,magnetic resonance imaging ,rf-induced heating ,python ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Medical technology ,R855-855.5 - Abstract
In magnetic resonance examination, the interaction between implants and the radio frequency (RF) fields induces heating in human tissue and may cause tissue damage. To assess the RF-induced heating of implants, three steps should be executed, including electromagnetic model construction, electromagnetic model validation, and virtual human body simulations. The crucial step of assessing RF-induced heating involves the construction of a test environment for electromagnetic model validation. In this study, a hardware environment, comprised of a RF generation system, electromagnetic field measurement system, and a robotic arm positioning system, was established. Furthermore, an automated control software environment was developed using a Python-based software development platform to enable the creation of a high-precision automated integrated test environment. The results indicate that the electric field generated in this test environment aligns well with the simulated electric field, making it suitable for assessing the RF-induced heating effects of implants.
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- 2024
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13. Effects of plant community structural characteristics on carbon sequestration in urban green spaces
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Xuguang Zhang, Hengshuo Huang, Ke Tu, Rui Li, Xinyu Zhang, Peng Wang, Yonghua Li, Qiusheng Yang, Aidan C. Acerman, Nan Guo, and Yang Liu
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Density ,Coverage ,Structural characteristics ,Optimal regulation ,Medicine ,Science - Abstract
Abstract The structural characteristics of plant communities in urban green spaces have a significant impact on their carbon sequestration function. In this study, comprehensive data were collected from 106 plant communities (each 20 m × 20 m) in Zhengzhou Green Expo Park. We assessed aboveground and soil carbon storage, alongside maintenance carbon emissions, to quantify carbon dynamics. Our primary objective was to establish a statistical model that correlates the structural attributes of plant communities with their total annual carbon sequestration. This model aims to provide a quantitative framework for optimizing community structures to maximize carbon sequestration in urban green spaces. The results showed that density and coverage were significantly and positively correlated with aboveground and soil carbon stocks. Density and mean height were significantly and positively correlated with maintenance carbon emissions. Density played a key structural role in regulating the total carbon sequestration of the plant communities, being 27.24 times more effective than coverage. The total annual carbon sequestration of the plant community reached an optimal value of 327.67 kg CO2-eq/y−1 at a density and cover of 0.15 and 1, respectively. This study provides valuable data for increasing the carbon sink ability of urban green spaces through plant structure regulation and supporting low-carbon development strategies in urban management.
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- 2024
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14. County-level urban forms and their correlation with local governance in Jiande, China: evidence from historical records
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Yuan Sun, Yiqun Wu, Huifang Yu, and Yonghua Li
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county level ,urban morphology ,urban ground plan ,local governance ,administrative division ,Architecture ,NA1-9428 ,Building construction ,TH1-9745 - Abstract
Examining the morphological evolution of ancient Jiande County (JD) over time, our research adopts a diachronic perspective to explore county-level spatial planning and its correlations with local governance during the feudal and republican eras. Utilizing historical records, including chronicles, geo-maps, and remote sensing images, to reconstruct urban ground plans, our findings unveil a historical shift in administrative management within the ancient Yanzhou region (YZ). In the Song Dynasty, feudal authority was distinctly manifested through a spatial hierarchy, diminishing in influence during the Ming-Qing Dynasty. In contemporary times, Meicheng Town (the ancient Jiande County) has departed from traditional urban layouts, relinquishing its central position in the local administrative hierarchy. JD’s historic transition in county-level urban planning and local governance paradigms provides evidence for examing its future development trajectories.
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- 2024
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15. Impaired immune responses in the airways are associated with poor outcome in critically ill COVID-19 patients
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Clea R. Barnett, Kelsey Krolikowski, Radu Postelnicu, Vikramjit Mukherjee, Imran Sulaiman, Matthew Chung, Luis Angel, Jun-Chieh J. Tsay, Benjamin G. Wu, Stephen T. Yeung, Ralf Duerr, Ludovic Desvignes, Kamal Khanna, Yonghua Li, Rosemary Schluger, Samaan Rafeq, Destiny Collazo, Yaa Kyeremateng, Nancy Amoroso, Deepak Pradhan, Sanchita Das, Laura Evans, Timothy M. Uyeki, Elodie Ghedin, Gregg J. Silverman, Leopoldo N. Segal, and Shari B. Brosnahan
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Medicine - Abstract
Introduction Mounting evidence indicates that an individual's humoral adaptive immune response plays a critical role in the setting of SARS-CoV-2 infection, and that the efficiency of the response correlates with disease severity. The relationship between the adaptive immune dynamics in the lower airways with those in the systemic circulation, and how these relate to an individual's clinical response to SARS-CoV-2 infection, are less understood and are the focus of this study. Material and methods We investigated the adaptive immune response to SARS-CoV-2 in paired samples from the lower airways and blood from 27 critically ill patients during the first wave of the pandemic (median time from symptom onset to intubation 11 days). Measurements included clinical outcomes (mortality), bronchoalveolar lavage fluid (BALF) and blood specimen antibody levels, and BALF viral load. Results While there was heterogeneity in the levels of the SARS-CoV-2-specific antibodies, we unexpectedly found that some BALF specimens displayed higher levels than the paired concurrent plasma samples, despite the known dilutional effects common in BALF samples. We found that survivors had higher levels of anti-spike, anti-spike-N-terminal domain and anti-spike-receptor-binding domain IgG antibodies in their BALF (p
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- 2024
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16. Multi-objective optimization design of anti-roll torsion bar using improved beluga whale optimization algorithm
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Yonghua Li, Zhe Chen, Maorui Hou, and Tao Guo
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Anti-roll torsion bar ,Multi-objective optimization ,IBWO ,Chaotic mapping ,Differential evolution ,Transportation engineering ,TA1001-1280 ,Railroad engineering and operation ,TF1-1620 - Abstract
Purpose – This study aims to reduce the redundant weight of the anti-roll torsion bar brought by the traditional empirical design and improving its strength and stiffness. Design/methodology/approach – Based on the finite element approach coupled with the improved beluga whale optimization (IBWO) algorithm, a collaborative optimization method is suggested to optimize the design of the anti-roll torsion bar structure and weight. The dimensions and material properties of the torsion bar were defined as random variables, and the torsion bar's mass and strength were investigated using finite elements. Then, chaotic mapping and differential evolution (DE) operators are introduced to improve the beluga whale optimization (BWO) algorithm and run case studies. Findings – The findings demonstrate that the IBWO has superior solution set distribution uniformity, convergence speed, solution correctness and stability than the BWO. The IBWO algorithm is used to optimize the anti-roll torsion bar design. The error between the optimization and finite element simulation results was less than 1%. The weight of the optimized anti-roll torsion bar was lessened by 4%, the maximum stress was reduced by 35% and the stiffness was increased by 1.9%. Originality/value – The study provides a methodological reference for the simulation optimization process of the lateral anti-roll torsion bar.
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- 2024
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17. A Study of the Diversity Patterns of Desert Vegetation Communities in an Arid Zone of China
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Zhiming Xin, Xing Li, Yonghua Li, Xue Dong, Ruibing Duan, Xu Chang, Yiben Cheng, Xiuqing Wu, and Wei Li
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plant community ,β-diversity ,environmental filtering ,species turnover ,climate change ,Botany ,QK1-989 - Abstract
The Gobi Desert ecosystem is currently experiencing the impacts of persistent climate warming and extreme weather. However, the relative influences of factors such as soil, climate, and spatial variables on the β-diversity of desert plants and their key components have not been systematically studied. In this research, the Dunhuang North Mountain and Mazong Mountain areas were selected as study areas, with a total of 79 plant community plots systematically established. The aim was to explore intercommunity β-diversity and its components and to analyze the interrelationships with climate factors, soil factors, and geographic distance. The results indicate that (1) there is a geographic decay pattern and significant differences among plant communities in the Dunhuang North Mountain and Mazong Mountain areas, with β-diversity primarily driven by replacement components. (2) Climate, soil, and geographic distance significantly influence β-diversity and its replacement components, with climate factors exerting the greatest influence and geographic distance the least. (3) Multiple regression analysis (MRM) reveals differential effects of climate factors, soil factors, and geographic distance on β-diversity and its replacement components, with climate and soil factors exerting a much greater influence than geographic distance. In summary, the β-diversity of plant communities and their replacement components in the Dunhuang North Mountain and Mazong Mountain areas result from the combined effects of habitat filtering and dispersal limitation, with habitat filtering having a greater impact, while environmental heterogeneity is an important factor influencing species differences in this region.
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- 2024
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18. A preclinical animal study to evaluate the operability and safety of domestic one-way endobronchial valves
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Yang Jiao, Sen Tian, Jian Liu, Xiaping Shen, Qin Wang, Xiang Li, Wei Zhang, Yuchao Dong, Yonghua Li, Chong Bai, and Haidong Huang
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one-way endobronchial valve ,bronchoscopy ,emphysema ,lung volume reduction ,safety ,animal ,Medicine (General) ,R5-920 - Abstract
PurposeTo evaluate the operability and safety of bronchoscopic domestic one-way endobronchial valves (EBV) on animals.MethodsNine pigs were randomly assigned (2:1) to receive domestic one-way EBV (the experimental group, n = 6) and Zephyr® EBV (the control group, n = 3). Routine blood tests, arterial blood gases, and CT scans of the lungs were performed 1 day pre-procedure in addition to 1 week and 1 month post-procedure to assess changes in blood markers and lung volumes. At 1 month post-procedure, the animals were sacrificed, followed by removal of all valves via bronchoscopy. Pathological examinations of critical organs were subsequently performed.ResultsA total of 15 valves were placed in the experimental group and 6 valves were placed in the control group, without serious complications. Routine blood tests and arterial blood gas examinations at 1 day pre-procedure, 1 week post-procedure, and 1 month post-procedure did not differ significantly in both groups. No EBV displacement was noted under bronchoscopy, and the valve was smoothly removable by bronchoscope at 1 month post-procedure. At 1 week post-procedure, varying degrees of target lung lobe volume reduction were observed on lung CT in both groups. Lung volume reduction was achieved at 1 month post-procedure in both groups, without significant statistical difference. Although 3 cases in the experimental group and 1 case in the control group developed varying degrees of pneumonia, the inflammatory response did not increase over time during the experimental period. Pathological examination revealed no significant abnormal changes in the critical organs for both groups.ConclusionOur results demonstrate that domestic EBV is safe and reliable for endobronchial application in general-grade laboratory white pigs. The safety of domestic EBV is similar to that of Zephyr® EBV, with good ease of use and operability. This kind of domestic EBV can meet the safety evaluation requirements for animal testing.
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- 2024
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19. Radial endobronchial ultrasound - guided bronchoscopy for the diagnosis of peripheral pulmonary lesions: A systematic review and meta-analysis of prospective trials
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Sen Tian, Xiang Li, Jian Liu, Xinyu Wang, Hui Chen, Zeyu Dai, Qian Chen, Hui Shi, Yonghua Li, Haidong Huang, and Chong Bai
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Endobronchial ultrasound ,Peripheral pulmonary lesions ,Biopsy ,Diagnosis ,Meta-analysis ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Background: The diagnostic yield of radial endobronchial ultrasound (r-EBUS) for the diagnosis of peripheral pulmonary lesions (PPLs) varies between studies and is affected by multiple factors. We aimed to evaluate the efficacy and safety of r-EBUS, and to explore the factors influencing the diagnostic yield of r-EBUS in patients with PPLs. Methods: The PubMed, Web of Science, and EMBASE databases were searched to identify relevant studies that used r-EBUS for diagnosing PPLs from the date of inception to Dec 2022. Meta-analysis was conducted using Review Manager 5.4 and Stata 15.1. Results: An analysis of 46 studies with a total of 7252 PPLs was performed. The pooled diagnostic yield of r-EBUS was 73.4 % (95 % CI: 69.9%–76.7 %), with significant heterogeneity detected among studies (I2 = 90 %, P 2 cm in size, malignant in type, solid in appearance on computerized tomography (CT), present in bronchus sign, the within probe location, and the addition of rapid on-site evaluation (ROSE) were associated with increased diagnostic yield, whereas use of a guide sheath (GS), bronchoscopy type, and a multimodality approach failed to influence the outcome. The pooled incidence rates of overall complications, pneumothorax and moderate and severe bleeding were 3.1 % (95 % CI: 2.1%–4.3 %), 0.4 % (95 % CI: 0.1%–0.7 %) and 1.1 % (95 % CI: 0.5%–2.0 %), respectively. Conclusions: r-EBUS has an appreciable diagnostic yield and an excellent safety manifestation when used to deal with PPLs.
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- 2024
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20. Spatio-temporal characteristics and decoupling relationship of new-type urbanization and carbon emissions at the county Level: A case study of Zhejiang Province, China
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Yiqun Wu, Congyue Zhou, Xingyu Lai, Yonghua Li, Liting Miao, and Huifang Yu
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New-type urbanization ,Carbon emissions ,Spatio-temporal characteristics ,Decoupling relationship ,Influencing factors ,County level ,Ecology ,QH540-549.5 - Abstract
Coordinating the relationship between new-type urbanization (NTU) and carbon emission (CE) reduction has emerged as a primary strategic objective in China. However, previous studies on this subject have predominantly focused on the unidirectional impact of NTU on CE, neglecting their spatio-temporal characteristics and the potential for a decoupling relationship. Focusing on the county-level areas in Zhejiang Province, this study establishes an evaluation system for measuring NTU and investigates the spatio-temporal characteristics and evolving decoupling relationship of NTU and CE from 2007 to 2021, along with the influencing factors. The results are shown as follows: (1) CE levels in Zhejiang's counties are predominantly higher in the northeast and lower in the southwest, with minimal temporal fluctuations. Concurrently, the collective NTU in these counties has witnessed a rapid increase, with a growing disparity in NTU levels and a concentration of higher NTU primarily in the northern regions. (2) From 2007 to 2021, the decoupling relationship between NTU and CE in Zhejiang's counties evolved from suboptimal to significantly improved, ultimately achieving continuous optimization, with the proportion of counties in the “strong decoupling II” category increasing to 60.7% in the final phase. (3) The most significant influencing factors for decoupling evolved from economic NTU predominance in 2007 to societal NTU in 2012, and further progressed to population NTU in 2022. (4) Informed by the types of decoupling and evolutionary factors, we propose strategies and implications aimed at fostering the high-quality, synergistic development of NTU and CE. These findings provide theoretical and empirical underpinnings for the high-quality attainment of NTU and the dual carbon objectives in China.
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- 2024
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21. Inflammation in the tumor-adjacent lung as a predictor of clinical outcome in lung adenocarcinoma
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Igor Dolgalev, Hua Zhou, Nina Murrell, Hortense Le, Theodore Sakellaropoulos, Nicolas Coudray, Kelsey Zhu, Varshini Vasudevaraja, Anna Yeaton, Chandra Goparaju, Yonghua Li, Imran Sulaiman, Jun-Chieh J. Tsay, Peter Meyn, Hussein Mohamed, Iris Sydney, Tomoe Shiomi, Sitharam Ramaswami, Navneet Narula, Ruth Kulicke, Fred P. Davis, Nicolas Stransky, Gromoslaw A. Smolen, Wei-Yi Cheng, James Cai, Salman Punekar, Vamsidhar Velcheti, Daniel H. Sterman, J. T. Poirier, Ben Neel, Kwok-Kin Wong, Luis Chiriboga, Adriana Heguy, Thales Papagiannakopoulos, Bettina Nadorp, Matija Snuderl, Leopoldo N. Segal, Andre L. Moreira, Harvey I. Pass, and Aristotelis Tsirigos
- Subjects
Science - Abstract
Abstract Approximately 30% of early-stage lung adenocarcinoma patients present with disease progression after successful surgical resection. Despite efforts of mapping the genetic landscape, there has been limited success in discovering predictive biomarkers of disease outcomes. Here we performed a systematic multi-omic assessment of 143 tumors and matched tumor-adjacent, histologically-normal lung tissue with long-term patient follow-up. Through histologic, mutational, and transcriptomic profiling of tumor and adjacent-normal tissue, we identified an inflammatory gene signature in tumor-adjacent tissue as the strongest clinical predictor of disease progression. Single-cell transcriptomic analysis demonstrated the progression-associated inflammatory signature was expressed in both immune and non-immune cells, and cell type-specific profiling in monocytes further improved outcome predictions. Additional analyses of tumor-adjacent transcriptomic data from The Cancer Genome Atlas validated the association of the inflammatory signature with worse outcomes across cancers. Collectively, our study suggests that molecular profiling of tumor-adjacent tissue can identify patients at high risk for disease progression.
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- 2023
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22. Influence of Seaweed Extracts on the Degradation and Effectiveness of 3,4-Dimethylpyrazole Phosphate
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Furong Xiao, Dongpo Li, Lili Zhang, Yonghua Li, Yandi Du, Yan Xue, Yiji Zhang, Ke Zhang, Ping Gong, Yuchao Song, and Kaikuo Wu
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biostimulants ,nitrification inhibitor ,black soil ,loess ,Biotechnology ,TP248.13-248.65 - Abstract
3,4-Dimethylpyrazole phosphate (DMPP) is acknowledged as one of the most efficient nitrification inhibitors (NIs); however, researchers have suggested that its effectiveness needs to be further improved. The authors combined the biostimulant seaweed extract (SE) with DMPP and conducted an indoor incubation experiment to initially investigate the impact of the influence of SE on the degradation and effectiveness of DMPP. Meanwhile, a method for the extraction and determination of DMPP was developed. DMPP performed better, with a longer effective time in loess than black soil, and SE showed a delayed effect on DMPP degradation of DMPP at the beginning of the incubation and then accelerated the degradation process. This was attributed to the adsorption effect of SE on DMPP, consequently reducing its effectiveness. The SE delayed the hydrolysis of urea in various soils; however, no significant impact on urease activity was observed (P < 0.05) (P < 0.05). Furthermore, it also increased potential nitrification rate (PNR) from 10 to 21 days and promoting the rapid transformation of NH4+-N in black soil. The SE reduced PNR within 21 days and inhibited nitrification in loess. In addition, the SE appeared to mitigate the adverse effects of excessive nitrogen on microorganisms The combination of DMPP and SE was not conducive to the inhibition of soil nitrification, and this formulation in field applications requires further investigation.
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- 2023
23. MFO-Fusion: A Multi-Frame Residual-Based Factor Graph Optimization for GNSS/INS/LiDAR Fusion in Challenging GNSS Environments
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Zixuan Zou, Guoshuai Wang, Zhenshuo Li, Rui Zhai, and Yonghua Li
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multi-sensor fusion ,GNSS/INS/LiDAR SLAM ,multi-frame residual ,two-stage optimization ,Science - Abstract
In various practical applications, such as autonomous vehicle and unmanned aerial vehicle navigation, Global Navigation Satellite Systems (GNSSs) are commonly used for positioning. However, traditional GNSS positioning methods are often affected by disturbances due to external observational conditions. For instance, in areas with dense buildings, tree cover, or tunnels, GNSS signals may be obstructed, resulting in positioning failures or decreased accuracy. Therefore, improving the accuracy and stability of GNSS positioning in these complex environments is a critical concern. In this paper, we propose a novel multi-sensor fusion framework based on multi-frame residual optimization for GNSS/INS/LiDAR to address the challenges posed by complex satellite environments. Our system employs a novel residual detection and optimization method for continuous-time GNSS within keyframes. Specifically, we use rough pose measurements from LiDAR to extract keyframes for the global system. Within these keyframes, the multi-frame residuals of GNSS and IMU are estimated using the Median Absolute Deviation (MAD) and subsequently employed for the degradation detection and sliding window optimization of the GNSS. Building on this, we employ a two-stage factor graph optimization strategy, significantly improving positioning accuracy, especially in environments with limited GNSS signals. To validate the effectiveness of our approach, we assess the system’s performance on the publicly available UrbanLoco dataset and conduct experiments in real-world environments. The results demonstrate that our system can achieve continuous decimeter-level positioning accuracy in these complex environments, outperforming other related frameworks.
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- 2024
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24. Comprehensive Perspective on Contamination Identification, Source Apportionment, and Ecological Risk Assessment of Heavy Metals in Paddy Soils of a Tropical Island
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Yan Guo, Yi Yang, and Yonghua Li
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potentially toxic elements ,paddy soil quality ,source apportionment ,risk allocation ,Agriculture - Abstract
The closed-loop material and energy cycles of islands increase the susceptibility of their internal ecosystem components to heavy metal accumulation and transfer. However, limited research on the island scale hinders our understanding of heavy metal environmental geochemistry in this unique environment. This study focused on assessing a tropical island’s ecological risk by investigating heavy metal contamination and potential sources. The results revealed elevated cadmium and nickel concentrations in 0.44–1.31% of soil samples, particularly in coastal plains and developed areas. Using the absolute principal component score-multiple linear regression (APCS-MLR) model assisted by GIS mapping, we identified three contamination sources: geological factors, agricultural activities, and traffic emissions. Network analysis indicated direct exposure risks of vegetation and soil microorganisms to contaminated soil (0.4611 and 0.7687, respectively), with nickel posing the highest risk, followed by Zn, Cd, Pb, Cu, and Cr with risks transferring across trophic levels. These findings provide crucial insights for mitigating ecological risks associated with heavy metals by controlling priority pollutants and their sources in tropical island environments.
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- 2024
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25. Digital Mapping and Scenario Prediction of Soil Salinity in Coastal Lands Based on Multi-Source Data Combined with Machine Learning Algorithms
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Mengge Zhou and Yonghua Li
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soil salinity ,soil salinity digital mapping ,machine learning algorithms ,CatBoost ,random forest ,Science - Abstract
Salinization is a major soil degradation process threatening ecosystems and posing a great challenge to sustainable agriculture and food security worldwide. This study aimed to evaluate the potential of state-of-the-art machine learning algorithms in soil salinity (EC1:5) mapping. Further, we predicted the distribution patterns of soil salinity under different future scenarios in the Yellow River Delta. A geodatabase comprising 201 soil samples and 19 conditioning factors (containing data based on remote sensing images such as Landsat, SPOT/VEGETATION PROBA-V, SRTMDEMUTM, Sentinel-1, and Sentinel-2) was used to compare the predictive performance of empirical bayesian kriging regression, random forest, and CatBoost models. The CatBoost model exhibited the highest performance with both training and testing datasets, with an average MAE of 1.86, an average RMSE of 3.11, and an average R2 of 0.59 in the testing datasets. Among explanatory factors, soil Na was the most important for predicting EC1:5, followed by the normalized difference vegetation index and soil organic carbon. Soil EC1:5 predictions suggested that the Yellow River Delta region faces severe salinization, particularly in coastal zones. Among three scenarios with increases in soil organic carbon content (1, 2, and 3 g/kg), the 2 g/kg scenario resulted in the best improvement effect on saline–alkali soils with EC1:5 > 2 ds/m. Our results provide valuable insights for policymakers to improve saline–alkali land quality and plan regional agricultural development.
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- 2024
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26. Predicting Land Use Changes under Shared Socioeconomic Pathway–Representative Concentration Pathway Scenarios to Support Sustainable Planning in High-Density Urban Areas: A Case Study of Hangzhou, Southeastern China
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Song Yao, Yonghua Li, Hezhou Jiang, Xiaohan Wang, Qinchuan Ran, Xinyi Ding, Huarong Wang, and Anqi Ding
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land use simulation ,land use planning ,built environment management ,system dynamic model ,PLUS model ,Building construction ,TH1-9745 - Abstract
Amidst the challenges posed by global climate change and accelerated urbanization, the structure and distribution of land use are shifting dramatically, exacerbating ecological and land-use conflicts, particularly in China. Effective land resource management requires accurate forecasts of land use and cover change (LUCC). However, the future trajectory of LUCC, influenced by climate change and urbanization, remains uncertain. This study developed an integrated multi-scenario framework by combining system dynamics and patch-generating land use simulation models to predict future LUCC in high-density urban regions under various Shared Socioeconomic Pathway (SSP)–Representative Concentration Pathway (RCP) scenarios. The results showed the following: (1) From 2020 to 2050, cultivated land, unused land, and water are projected to decrease, while construction land is expected to increase. (2) Future land use patterns exhibit significant spatial heterogeneity across three scenarios. Construction land will expand in all districts of Hangzhou, particularly in the main urban areas. Under the SSP585 scenario, the expansion of construction land is most significant, while it is the least under the SSP126 scenario. (3) Distinct factors drive the expansion of different land use types. The digital elevation model is the predominant factor for the expansion of forest and grassland, contributing 19.25% and 30.76%, respectively. Night light contributes the most to cultivated land and construction land, at 13.94% and 20.35%, respectively. (4) The average land use intensity (LUI) in central urban districts markedly surpasses that in the surrounding suburban areas, with Xiacheng having the highest LUI and Chun’an the lowest. Under the SSP126 scenario, the area with increased LUI is significantly smaller than under the SSP245 and SSP585 scenarios. These findings offer valuable guidance for sustainable planning and built environment management in Hangzhou and similarly situated urban centers worldwide.
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- 2024
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27. Habitat Protection in Urban–Rural Fringes through Coordinated Ecological Network Construction and Territorial Planning
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Yuting Xie, Jiaxin Ying, Jie Zou, Ruohao Li, Haoxun Zhang, Qie Shi, and Yonghua Li
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habitat protection ,ecological network ,urban–rural fringe ,stepping stones ,cost-effectiveness ,territorial planning ,Agriculture - Abstract
Urban–rural fringes (URFs) are crucial for biodiversity yet often neglected in conservation efforts. This study refines URF habitat evaluation and integrates it into a coordinated ecological network (EN) and territorial planning framework. Using Qingpu District, Shanghai as a case study, we defined its URF via k-means clustering of night-time light data and applied the InVEST model, MSPA, Integrated Habitat Value, Patch Importance, and Betweenness Centrality analyses to identify high-value URF habitats. Furthermore, we constructed the EN using circuit theory and evaluated the impact of URF sources on network connectivity and construction costs. Our findings reveal that integrating URF sources increased connectivity indices significantly (α by 127.18%, β by 47.00%, and γ by 33.4%) and decreased construction costs (CR index by 0.07). Despite these benefits, under China’s “Three Zones and Three Lines” policy, 78.18% of Qingpu’s URF sources remain unprotected, with 56.78% at risk of conversion to construction land. Our study proposes a comprehensive evaluation system for URF habitats and strategic recommendations for their incorporation into regional ENs, thus informing policy making and planning for more inclusive ecological conservation.
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- 2024
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28. Discrimination of Deepwater Drilling Overflow Based on EDF-FM Model.
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Kai Lang, Zhiming Yin, Yanzhao Chen, Yonghua Li, Zhong Li, and Deqiang Tian
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- 2023
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29. A Vision-Aided Beamforming System for Unmanned Airship.
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Zixuan Zou, Yonghua Li 0001, Guanyu Zhang, and Songlin Sun
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- 2023
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30. Design of a Mock Circulatory Loop with Both Systemic and Pulmonary Circulations.
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Xun Liu, Yonghua Li, Ya Chen, Chengling Li, and Sheng Hu
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- 2023
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31. The suppression of cervical cancer ferroptosis by macrophages: The attenuation of ALOX15 in cancer cells by macrophages-derived exosomes
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Yanlin Luo, Yibing Chen, Huan Jin, Benxin Hou, Hongsheng Li, Xiang Li, Lingfeng Liu, Yuan Zhou, Yonghua Li, Yong Sang Song, Quentin Liu, and Zhengzhi Zou
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Cervical cancer ,Tumor-associated macrophage ,ALOX15 ,Ferroptosis ,Exosome ,miRNA-660-5p ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Induction of cancer cell ferroptosis has been proposed as a potential treatment in several cancer types. Tumor-associated macrophages (TAMs) play a key role in promoting tumor malignant progression and therapy resistance. However, the roles and mechanisms of TAMs in regulating tumor ferroptosis is still unexplored and remains enigmatic. This study shows ferroptosis inducers has shown therapeutic outcomes in cervical cancer in vitro and in vivo. TAMs have been found to suppress cervical cancer cells ferroptosis. Mechanistically, macrophage-derived miRNA-660-5p packaged into exosomes are transported into cancer cells. In cancer cells, miRNA-660-5p attenuates ALOX15 expression to inhibit ferroptosis. Moreover, the upregulation of miRNA-660-5p in macrophages depends on autocrine IL4/IL13-activated STAT6 pathway. Importantly, in clinical cervical cancer cases, ALOX15 is negatively associated with macrophages infiltration, which also raises the possibility that macrophages reduce ALOX15 levels in cervical cancer. Moreover, both univariate and multivariate Cox analyses show ALOX15 expression is independent prognostic factor and positively associated with good prognosis in cervical cancer. Altogether, this study reveals the potential utility of targeting TAMs in ferroptosis-based treatment and ALOX15 as prognosis indicators for cervical cancer.
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- 2023
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32. Construction of ecological security pattern of Jiangnan water town considering water-related ecosystem services: a case study of Yuecheng District, Shaoxing
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Meizi Zhou, Yong He, Yonghua Li, Jialei Wang, and Song Yao
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Ecological security pattern ,water-related ecosystem services ,Jiangnan water town ,water management ,Physical geography ,GB3-5030 - Abstract
The ecological security pattern (ESP) is considered an effective method to balance urban development and ecological protection. Integrating water-related ecosystem services (ESs) into the ESP construction process is essential for protecting urban water systems. In this study, Yuecheng District, a typical Jiangnan water town, was selected as the study area. We combined water-related ESs hotspots, landscape connectivity analysis and ecological resistance surfaces to identify areas that should be prioritized for restoration. The results indicated that (1) 25 ecological sources were identified, mainly distributed in the central canal water network area and the southern mountainous area; (2) we extracted 51 ecological corridors, with 44 of these being blue ecological corridors overlapping with rivers; (3) we developed a spatial optimization scheme known as “two belts, one circle and three zones” based on the ESP. This study offers valuable insights for sustainable planning and refined river and lake management in Jiangnan Water Town.
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- 2024
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33. Effect of Seaweed Extracts from Different Sources Combined with Urease and Nitrification Inhibitors
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Furong Xiao, Dongpo Li, Lili Zhang, Yandi Du, Yan Xue, Ping Gong, Yuchao Song, Ke Zhang, Yiji Zhang, Yonghua Li, Jinming Zhang, and Yongkun Cui
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biostimulant ,urea ,black soil ,nitrogen use efficiency ,Biotechnology ,TP248.13-248.65 - Abstract
Urease inhibitors (UIs) and nitrification inhibitors (NIs) still have limitations in increasing crop yield. Therefore, to improve the application effect of inhibitors, the combination of seaweed extracts (SE) from different sources and inhibitors was added to urea to provide a theoretical basis for the development of a new generation of efficient stabilized urea fertilizer with both biostimulant and inhibitor technologies. The combinations were tested in outdoor pots with no N- fertilizer (CK), application of urea alone (U) as control, and kelp polysaccharide (KP), margin polysaccharide (MP), N−(n−propyl) thiophosphoric triamide (NPPT), dicyandiamide (DCD), and combinations of SE with inhibitor were added to urea to make eight fertilizer prototypes. Compared with KP, MP showed better application effect, with significantly higher grain yield and nitrogen use efficiency (NUE) (P < 0.05). Compared with the addition of inhibitor alone, the combinations of NPPT with KP and MP, respectively, had opposite effects on urea−N transformation, meanwhile NPPT+KP had a positive effect. However, NPPT+MP significantly decreased yield, plant nitrogen uptake, and NUE (P < 0.05); DCD+MP decreased plant N uptake and NUE to some extent. Therefore, the addition of NPPT with KP and DCD with KP to urea significantly improved yield when planting maize in black soil.
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- 2023
34. Belowground microbiota analysis indicates that Fusarium spp. exacerbate grapevine trunk disease
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Yonghua Li, Xinghong Li, Wei Zhang, Jiao Zhang, Hui Wang, Junbo Peng, Xuncheng Wang, and Jiye Yan
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Grapevine trunk diseases ,Microbiota ,Belowground ,Fusarium spp. ,Fungi ,Environmental sciences ,GE1-350 ,Microbiology ,QR1-502 - Abstract
Abstract Background Grapevine trunk diseases (GTDs) are disease complexes that are major threats to viticulture in most grapevine growing regions. The microbiomes colonizing plant belowground components form complex associations with plants, play important roles in promoting plant productivity and health in natural environments, and may be related to GTD development. To investigate associations between belowground fungal communities and GTD symptomatic or asymptomatic grapevines, fungal communities associated with three soil–plant compartments (bulk soils, rhizospheres, and roots) were characterized by ITS high-throughput amplicon sequencing across two years. Results The fungal community diversity and composition differs according to the soil–plant compartment type (PERMANOVA, p
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- 2023
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35. Potential Mechanism for the Prevention and Treatment Effect of Non-alcoholic Fatty Liver Disease:Aspergillus cristatus Fermented Taxilli Herba Tea Based on Process Optimization
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Wenxin WU, Zhanmin QIN, Jiali LIU, Liuyan CHEN, Yuping XIA, Yu HUANG, Xiaoyong LIU, and Yonghua LI
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taxilli herba tea ,aspergillus cristatus ,process optimization ,non-alcoholic fatty liver disease ,network pharmacology ,Food processing and manufacture ,TP368-456 - Abstract
Objective: Explore and establish the best process of Taxilli Herba tea fermented by Aspergillus cristatus, and dig the potential mechanism of Taxilli Herba tea fermented by A. cristatus on the prevention and treatment effect of non-alcoholic fatty liver disease (NAFLD). Methods: In order to optimize the process of Taxilli Herba tea fermented by A. cristatus, analytic hierarchy process (AHP) was applied, main chemical components and organoleptic evaluation were taken as evaluation indexes, single factor experiments were taken, and orthogonal experiment was used. Moreover, to dig and evaluate the prevention and treatment effect of NAFLD, the model in Zebrafish larval induced by 0.1% egg yolk powder and 5 mmol·mL−1 thioacetamide was used. Finally, technologies of UPLC-Q-TOF-MS/MS and network pharmacology were applied to select key compounds and core targets, and accomplish molecular docking. Results: The optimal fermentation process was as follows: The content of water was 35%, the time of pile-fermentation was 3 h, the concentration of A. cristatus was 1×106 CFU·mL−1, and fermentation time was 7 d. Taxilli Herba tea fermented by A. cristatus showed significant prevention and treatment effects in NAFLD (P
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- 2023
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36. Effect of Processing Technology on Quality and Functional Activity of Taxilli Herba Tea
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Wenxin WU, Zhanmin QIN, Jiali LIU, Liuyan CHEN, Yuping XIA, Xianan LI, Xiaoyong LIU, and Yonghua LI
- Subjects
taxilli herba tea ,processing technology ,quality ,functional activity ,organoleptic evaluation ,Food processing and manufacture ,TP368-456 - Abstract
Objective: To explore the effect of different processing technology on the quality and functional activity of Taxilli Herba tea. Methods: A total of eight different samples of Taxilli Herba tea were prepared by different procedures combined with 3 processing technologies including natural fermentation, fixation, and Aspergillus cristatus fermentation. After processing, determinations were done on the main chemical components, antioxidant activity, influence on α-amylase activity, and organoleptic evaluation. Results: The content of 5 chemical compounds, including water extract, free amino acid, tea polyphenol, total flavonoid, and soluble sugar in Taxilli Herba tea, were increased (P < 0.05) after fixation while the antioxidant activity was improved too. The delightful odour of Taxilli Herba tea processed by natural fermentation was enhanced. The α-amylase activity of Taxilli Herba tea fermented by A. cristatus was significantly improved (P
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- 2023
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37. Latent Tuberculosis Infection Is Associated with an Enrichment of Short-Chain Fatty Acid-Producing Bacteria in the Stool of Women Living with HIV
- Author
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Suventha Moodley, Elouise Kroon, Charissa C. Naidoo, Georgina R. Nyawo, Benjamin G. Wu, Selisha Naidoo, Tinaye L. Chiyaka, Happy Tshivhula, Shivani Singh, Yonghua Li, Robin M. Warren, Eileen G. Hoal, Erwin Schurr, Jose C. Clemente, Leopoldo N. Segal, Marlo Möller, and Grant Theron
- Subjects
microbiota ,latent tuberculosis ,HIV ,short-chain fatty acids ,Biology (General) ,QH301-705.5 - Abstract
Latent tuberculosis infection (LTBI) is common in people living with HIV (PLHIV) in high-TB-burden settings. Active TB is associated with specific stool taxa; however, little is known about the stool microbiota and LTBI in PLHIV. We characterised the stool microbiota of PLHIV with [interferon-γ release assay (IGRA)- and tuberculin skin test (TST)-positive] or without (IGRA- and TST-negative) LTBI (n = 25 per group). The 16S rRNA DNA sequences were analysed using QIIME2, Dirichlet-Multinomial Mixtures, DESeq2, and PICRUSt2. No α- or β-diversity differences occurred by LTBI status; however, LTBI-positive people were Faecalibacterium-, Blautia-, Gemmiger-, and Bacteroides-enriched and Moryella-, Atopobium-, Corynebacterium-, and Streptococcus-depleted. Inferred metagenome data showed that LTBI-negative-enriched pathways included several metabolite degradation pathways. Stool from LTBI-positive people demonstrated differential taxa abundance based on a quantitative response to antigen stimulation. In LTBI-positive people, older people had different β-diversities than younger people, whereas in LTBI-negative people, no differences occurred across age groups. Amongst female PLHIV, those with LTBI were, vs. those without LTBI, Faecalibacterium-, Blautia-, Gemmiger-, and Bacteriodes-enriched, which are producers of short-chain fatty acids. Taxonomic differences amongst people with LTBI occurred according to quantitative response to antigen stimulation and age. These data enhance our understanding of the microbiome’s potential role in LTBI.
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- 2024
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38. Multiscale Ecological Zoning Management with Coupled Ecosystem Service Bundles and Supply–Demand Balance, the Case of Hangzhou, China
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Yonghua Li, Xinyi Ding, Song Yao, Bo Zhang, Hezhou Jiang, Junshen Zhang, and Xinwei Liu
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bundles ,ecosystem services ,ecological zoning management ,scale effect ,supply–demand matching ,spatial pattern ,Agriculture - Abstract
Grasping the interrelationship between the supply and demand of ecosystem services (ESs) and spatial scale characteristics is the foundation for effective ecological zoning management, which helps to realize a win–win situation for both ecological protection and economic development. This paper focuses on the following three real problems: mismatch in ES supply and demand evaluation, mechanical and subjective delineation of ecological zoning, and rough management strategies, and constructs a multi-scale ecological zoning management framework for the “comprehensive evaluation of supply and demand, ecological zoning, and enhancement of human well-being”. This study integrates the InVEST model, SOM, Z-score quadrant matching, and coordination degree method, and applies them to the ecological management zoning of Hangzhou. The results show that (1) the spatial differentiation of ESs in Hangzhou is significant. The spatial pattern of the five types of ES supply varies at the county scale and the grid scale on which ES demand is concentrated and is consistent at different scales. (2) ES supply–demand matching in Hangzhou is at the basic coordination and can be divided into four modes including HH, LH, LL, and HL at both the county and grid scales. On the small scale, the proportion of mismatches declines slightly, but the severity rises. (3) ES supply is divided into four categories as follows: the food production bundle, the carbon storage bundle, the ESs balancing bundle, and the ESs depleting bundle, and clarifies the priority of ES management. (4) Construct an ecological management practice path, delineates 6 ecological management zones at the county scale and 19 secondary management zones at the grid scale. Targeted measures are proposed in terms of supply–demand adjustment strategies, ecological management strategies, and key implementation areas. This study helps to incorporate the interaction between the supply and demand of ESs into the planning framework and provides decision-making support for refined ecological management.
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- 2024
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39. Spatio-Temporal Dynamics of Carbon Emissions and Their Influencing Factors at the County Scale: A Case Study of Zhejiang Province, China
- Author
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Xuanli Wang, Huifang Yu, Yiqun Wu, Congyue Zhou, Yonghua Li, Xingyu Lai, and Jiahao He
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county level ,carbon emissions ,spatio-temporal dynamic ,influencing factors ,Zhejiang ,Agriculture - Abstract
Significant carbon emissions, a key contributor to global climate warming, pose risks to ecosystems and human living conditions. It is crucial to monitor the spatial and temporal patterns of carbon emissions at the county level to reach the goals of carbon peak and neutrality. This study examines carbon emissions and economic and social problems data from 89 counties in Zhejiang Province. It employs analytical techniques such as LISA time path, spatio-temporal transition, and standard deviational ellipse to investigate the trends of carbon emissions from 2002 to 2022. Furthermore, it utilizes the GTWR model to evaluate the factors that influence these emissions on a county scale. The findings reveal the following: (1) The LISA time path analysis indicates a pronounced local spatial structure in the distribution of carbon emissions in Zhejiang Province from 2002 to 2022, characterized by increasing stability, notable path dependency, and some degree of spatial integration, albeit with a diminishing trend in overall integration. (2) The LISA spatio-temporal transition analysis indicates significant path dependency or lock-in effects in the county-level spatial clustering of carbon emissions. (3) Over the period 2002–2022, the centroid of carbon emissions in Zhejiang’s counties mainly oscillated between 120°55′15″ E and 120°57′01″ E and between 29°55′52″ N and 29°59′11″ N, with a general northeastward shift forming a “V” pattern. This shift resulted in a stable “northeast–southwest” spatial distribution. (4) Factors such as population size, urbanization rate, and economic development level predominantly accelerate carbon emissions, whereas industrial structure tends to curb them. It is crucial to customize carbon mitigation plans to suit the circumstances of each county. This study provides insight into the spatial and temporal patterns of carbon emissions at the county level in Zhejiang Province. It offers crucial guidance for developing targeted and practical strategies to reduce carbon emissions.
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- 2024
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40. A Structural Reliability Analysis Method Considering Multiple Correlation Features
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Xiaoning Bai, Yonghua Li, Dongxu Zhang, and Zhiyang Zhang
- Subjects
correlation ,multiple failure mechanisms ,structural reliability ,time-varying hybrid copula ,VASSA ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
The paper analyzes the correlation features between stress strength, multiple failure mechanisms, and multiple components. It investigates the effects of different correlation features on reliability and proposes a method for structural reliability analysis that considers the joint effects of multiple correlation features. To portray the stress–strength correlation structure, the Copula function is utilized and the influence of the correlation degree parameter on reliability is clarified. The text describes the introduction of time-varying characteristics of structural strength and correlation parameters. A time-varying Copula is then constructed to calculate the structural reliability under the stress–strength correlation characteristics. Additionally, a time-varying hybrid Copula is constructed to characterize the intricate and correlation features of multiple failure mechanisms and components. The article proposes the variational adaptive sparrow search algorithm (VASSA) to obtain optimal parameters for the time-varying hybrid Copula. The effectiveness and accuracy of the proposed method are verified through actual cases. The results indicate that multiple correlation features significantly influence structural reliability. Incorporating multiple correlation features into the solution of structural reliability yields safer results that align with engineering practice.
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- 2024
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41. Distribution of cadmium and lead in soil–rice systems and their environmental driving factors at the island scale
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Yan Guo, Yi Yang, Ruxia Li, Xiaoyong Liao, and Yonghua Li
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Cadmium ,Lead ,Soil–rice systems ,Driving factors ,Distribution patterns ,Environmental pollution ,TD172-193.5 ,Environmental sciences ,GE1-350 - Abstract
Toxic elements, such as Cd and Pb are of primary concern for soil quality and food security owing to their high toxicity and potential for bioaccumulation. Knowledge of the spatial variability of Cd and Pb in soil–rice systems across the landscape and identification of their driving factors are prerequisites for developing appropriate management strategies to remediate or regulate these hazardous contaminants. Considering the role of rice (Oryza sativa) as a dietary staple in China, this study aimed to examine the distribution patterns and drivers of Cd and Pb in tropical soil–rice systems across Hainan Island. To achieve this goal, 229 pairs of representative paddy soil and rice samples combined with a set of environmental covariates at the island scale were systematically analyzed. Arithmetic mean values (AMs) of Cd and Pb in rice were 0.080 and 0.199 mg kg−1, and exceeded the standard limits by 27.1% and 22.7%, respectively. We found that the AMs of Cd and Pb concentrations in paddy soil were 0.294 and 43.0 mg kg−1. Additionally, Cd in 29.26% of soil samples and Pb in 11.35% of soil samples exceeded the risk screening value for toxic elements. The enrichment factor generally showed that soil Cd and Pb on Hainan Island were both moderately enriched. Results obtained from both Spearman's correlation and stepwise regression analyses suggest that the concentrations of soil Cd and Pb are significantly influenced by the soil Na and Fe concentrations. Specifically, an increment of 1 g kg−1 in soil Na caused a rise of soil Cd and Pb by 57.1 mg kg−1 and 34.4 mg kg−1, respectively, while an increase of 1 g kg−1 in soil Fe resulted in a rise by 25.0 mg kg−1 and 14.5 mg kg−1. Similarly for rice grains, an increment of 1 g kg−1 in soil Ca resulted in a rise of rice Pb by 30.8 mg kg−1, whereas an increase of 1 g kg−1 in soil Mg led to a decrease in rice Pb by 14.8 mg kg−1. However, no significant correlation between soil Se and rice Cd concentrations was found. Furthermore, the result of geographically weighted regression revealed that the impacts of soil Na, Ca, Fe, and Mg on rice Cd were more significant in the western region, whereas the effects of soil Na and Fe on rice Pb were stronger in the northeastern region. This study provides new insights for the identification of factors influencing the distribution and accumulation of Cd and Pb in tropical island agroecosystems.
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- 2023
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42. Comparative evaluation of multi-scale spatiotemporal variability and drivers of carbon storage: An empirical study from 369 cities, China
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Yonghua Li, Hezhou Jiang, Bo Zhang, Song Yao, Xinyun Gao, Junshen Zhang, and Chen Hua
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Carbon stock ,Land use and land cover change (LULC) ,Spatial heterogeneity ,Low carbon policies ,Urban development factors ,Decision-making-support ,Ecology ,QH540-549.5 - Abstract
Under the background of global climate change, the role of carbon storage in mitigating the increase of atmospheric CO2 concentrations is of paramount importance. However, land use and land cover change (LULC) resulting from urban sprawl disturbs the level and distribution of carbon storage. This study aims to explore the spatiotemporal variability of carbon storage and the correlations between that and urban development for China’s 369 cities in 2000, 2010, and 2020. The InVEST model and several multiple linear regression models are employed and the results show that: (1) Cities in western China sequester a large amount of carbon (maximum greater than 2000 TgC) and only some of them, from 2010 to 2020, can maintain a positive change in carbon storage. The rest of China shows a negative change, but a higher carbon storage per area (maximum greater than 0.01 TgC/km2 in the east). Moran's I shows that such variability has a significant spatial autocorrelation. (2) The intensification of the population, the growth of economy, and urbanization are the main factors influencing carbon storage, which are not only reflected on the national scale but also have different local characteristics in different regions. Cities in China's inland regions (e.g., western, some central, and northeastern China), most of which are developing cities, show more diversified impacts of their urban development on carbon storage. However, in developed cities, mostly concentrated in the eastern region, such impacts and variations show a more unified trend. Considering that environmental policy is often a national action, therefore, to strengthen the carbon sequestration capacity of cities, it is necessary to formulate not only a unified leading policy from the national level but also the practical policies of local governments of cities that match their development stages.
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- 2023
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43. Anomaly detection model for multivariate time series based on stochastic Transformer
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Weigang HUO, Rui LIANG, and Yonghua LI
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stochastic Transformer ,variational autoencoder ,multivariate time series ,anomaly detection ,Telecommunication ,TK5101-6720 - Abstract
Aiming at the problem that the existing multivariate time series anomaly detection models based on variational autoencoders could not propagate long-term temporal dependencies between stochastic variables in latent space, the stochastic Transformer for MTS anomaly detection (ST-MTS-AD) model which combined Transformer encoder with VAE was proposed.In the inference network of the ST-MTS-AD, the MTS long-term temporal dependent features generated by Transformer encoder and the sampled values of the stochastic variables at the previous moment were inputted into the multilayer perceptron, the approximate posterior distribution of the stochastic variables at the current moment was generated by the multilayer perceptron, and the temporal dependencies between stochastic variables were realized.The gated transition function(GTF) was used to generate the prior distribution of stochastic variables.The generation network of the ST-MTS-AD reconstructed the distribution of the MTS values at each moment by the multilayer perceptron whose input was the MTS long-term temporal dependent features generated by the inference network and the approximate posterior sampling values of stochastic variables.The distribution of normal MTS dataset was learned by the variational inference technology, and the abnormal MTS segment was determined by the log-likelihood of the reconstruction probability.Experiments on four public datasets show that the ST-MTS-AD model significantly improves the F1 score over the typical baseline models.
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- 2023
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44. Constraining the crustal structure under the central and western Tian Shan based on teleseismic receiver functions and gravity anomaliesKey points
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Yonghua Li, Hanhan Tang, and Lei Shi
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Tian Shan ,crustal thickness ,crustal compsotion ,receiver function ,gravity anomaly ,Geology ,QE1-996.5 - Abstract
The Tian Shan is a vast range that spans several countries in Asia. Understanding its evolutionary history may provide valuable insights into intracontinental orogenic dynamics. In this study, we explored the crustal characteristics of the Tian Shan and their relationships to the tectonic evolution of the region. A new H-stacking method that combines the P receiver function and gravity anomalies was used to estimate the thickness and ratio of P- to S-wave velocities (vP/vS) for 91 broadband seismic stations in the central and western Tian Shan. Our results revealed significant lateral variations in crustal thickness and vP/vS. A ∼45-km-thick crust and an intermediate-high vP/vS (∼1.74–1.84) were found in the Kazakh Shield and Tarim Basin, which we interpreted to indicate a mafic crystalline basement and lower crust. The central Tian Shan varied greatly in crustal thickness (40–64 km) and vP/vS ratio (1.65–2.00), which may be due to crustal shortening, mafic underplating, and crustal melting. In contrast, we observed a relatively thin crust (42–50 km) with an intermediate vP/vS ratio (∼1.78) in the western Tian Shan. The differences in the crustal structures between the western and central Tian Shan imply that the Talas-Fergana Fault may be trans-lithospheric.
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- 2023
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45. Pleural fluid microbiota as a biomarker for malignancy and prognosis
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Benjamin Kwok, Benjamin G. Wu, Ibrahim F. Kocak, Imran Sulaiman, Rosemary Schluger, Yonghua Li, Raheel Anwer, Chandra Goparaju, Daniel J. Ryan, Marla Sagatelian, Matthew S. Dreier, Vivek Murthy, Samaan Rafeq, Gaetane C. Michaud, Daniel H. Sterman, Jamie L. Bessich, Harvey I. Pass, Leopoldo N. Segal, and Jun-Chieh J. Tsay
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Medicine ,Science - Abstract
Abstract Malignant pleural effusions (MPE) complicate malignancies and portend worse outcomes. MPE is comprised of various components, including immune cells, cancer cells, and cell-free DNA/RNA. There have been investigations into using these components to diagnose and prognosticate MPE. We hypothesize that the microbiome of MPE is unique and may be associated with diagnosis and prognosis. We compared the microbiota of MPE against microbiota of pleural effusions from non-malignant and paramalignant states. We collected a total of 165 pleural fluid samples from 165 subjects; Benign (n = 16), Paramalignant (n = 21), MPE-Lung (n = 57), MPE-Other (n = 22), and Mesothelioma (n = 49). We performed high throughput 16S rRNA gene sequencing on pleural fluid samples and controls. We showed that there are compositional differences among pleural effusions related to non-malignant, paramalignant, and malignant disease. Furthermore, we showed differential enrichment of bacterial taxa within MPE depending on the site of primary malignancy. Pleural fluid of MPE-Lung and Mesothelioma were associated with enrichment with oral and gut bacteria that are commonly thought to be commensals, including Rickettsiella, Ruminococcus, Enterococcus, and Lactobacillales. Mortality in MPE-Lung is associated with enrichment in Methylobacterium, Blattabacterium, and Deinococcus. These observations lay the groundwork for future studies that explore host-microbiome interactions and their influence on carcinogenesis.
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- 2023
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46. Advances in passive seismic analysis of sediment structure and applications in some typical basins
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Ruiqing Zhang, Chunli Kuang, Xiaohan Zhang, and Yonghua Li
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sediment structure ,receiver function ,h-β technique ,p-wave particle motion ,ambient noise tomography ,rayleigh wave z/h ratio ,spectral ratio ,Geophysics. Cosmic physics ,QC801-809 ,Astrophysics ,QB460-466 - Abstract
Accurate constraints on sediment structure are of great importance for investigation and exploration of oil and gas resources, evaluation of site response, and imaging of deep crust and mantle structure. With the advance of seismic observation and the accumulation of large data from portable arrays, seismological methods using passive source to resolve sediment structures with high resolution have developed. In this paper, we review the advances in the seismological analyses and their basic principles, including receiver functions, transfer functions, H-β technique based on wavefield downward continuation, and P-wave particle motion using teleseismic data. Waveform fitting with high frequency is usually used for sediment structure constraints from local earthquakes. In addition, we also briefly review the analyses of spectral ratio, ambient noise tomography, Rayleigh wave Z/H amplitude ratio, and their joint inversion. Finally, we summarize the progress of research work on the structure of the shallow crust beneath the Songliao and North China basins based on these methods.
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- 2023
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47. Non-native fish of the Upper Irtysh and the Ulungur Rivers in China
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Chen Tian, Lei Fang, Xuejian Li, Yonghua Li, Tianjian Song, Jiang Chang, Cunqi Liu, and Yahui Zhao
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Altay region ,distribution ,non-native fish ,endan ,Biology (General) ,QH301-705.5 - Abstract
The Chinese section of the Irtysh River Basin and the Ulungur River Basin, two major river basins of the Altay region, are located at the northwest of Xinjiang Uygur Autonomous Region of China. As an international river, the Chinese section has seven state-level protected fish and seven local-level protected species as well. Many more commercial species have been introduced from eastern China and other countries, accompanied by some low-value and small-sized fish in recent decades. The non-native fish species have already threatened these protected fish. This study investigated the distribution of non-native fish species in the Chinese section of the Irtysh River Basin and the Ulungur River Basin. The basic data for the biodiversity conservation and the information of the non-native fish in these two river basins were gathered.There are a lot of studies on native fish in the Chinese section of the Irtysh River Basin and Urungur River Basin in China, but there is a lack of studies on non-native fish. Thirteen non-native fish belonging to four orders, nine families and 12 genera were collected in this study. The study includes one dataset. The dataset presents taxonomy, distribution, water body and location for each of the non-native fish collected from the Chinese section of the Irtysh River Basin and the Ulungur River Basin. Our study has found that the proportion of native species has declined, while the number of non-native species has increased from 2013 to 2022. The information we provided could help to develop an international strategy for the protection of aquatic biodiversity.
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- 2023
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48. Crustal structure beneath the central and western North China from receiver function analysis
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Xin Gao, Yonghua Li, Xiaoyu Yang, and Zhiyuan Ren
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receiver functions ,H-κ stacking ,crustal thicknesses ,vP/vS ratios ,North China ,Geology ,QE1-996.5 - Abstract
The North China Craton (NCC) is one of the oldest cratons on earth. Several important tectonic transformations of Mesozoic-Cenozoic tectonic regime led to the destruction of the North China craton. The knowledge of crustal structure can provide important constraints for the formation and evolution of cratons. New maps of sediment thickness, crustal thickness (H) and vP/vS (κ) in the central and western NCC were obtained using sequential H-κ stacking. P-wave receiver functions are calculated using teleseismic waveform data recorded by 405 stations from ChinArray project. Benefiting from the densely distribution of temporary seismic stations, our results reveal details of the crustal structure in the study area. The thickness of sedimentary layer in North China ranges from 0–6.4 km, and the thickest sedimentary layer is in Ordos block and its surroundings (about 2.8–6 km); The thickness of sedimentary layer in the Mongolia fold belt and Yinshan orogenic belt is relatively thin (less than 1 km). The crustal thickness of the study area varies between 27–48 km, of which the crust of the North China Plain is about 30–33 km, the central NCC is about 33–40 km, and the Ordos block is 40–48 km thick. The average vP/vS ratios in the study area is mostly between 1.66 and 1.90, and that in the Yanshan-Taihang mountain fold belt is between 1.70 and 1.85, and that in the Ordos block is between 1.65 and 1.90, with an average value of 1.77, indicating the absence of a thick basaltic lower crust. The obvious negative correlation between crustal thickness and average vP/vS ratio within Ordos and Central Asia orogenic belt may be related to magmatic underplating during the crustal formation. There is no significant correlation between the crustal thickness and the vP/vS ratio in the Lüliang-Taihang mountain fold belt, which may be related to the multiple geological processes such as underplating and crustal extension and thinning in this area. The lack of correlation between crust thickness and topography in the central orogenic belt and the North China Basin indicates the topography of these areas are controlled not only by crustal isostatic adjustment but also by the lithospheric mantle processes.
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- 2022
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49. Identification of Wellbore Flow Abnormal Working Conditions Based on Deep Learning.
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Yanzhao Chen, Mengbo Li, and Yonghua Li
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- 2022
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50. Study on heat transfer characteristics of air-cooled dry bottom ash removal system
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Yonghua Li, Zhi Fu, Wei Wang, and Wenjie Liu
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dry bottom ash removal system ,Waste heat recovery ,Numerical modeling ,Operation adjustment ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This paper develops a numerical model to describe the bottom ash cooling process based on an actual power plant. By means of computational fluid dynamics, the influence of adjusting the operating parameters of the dry bottom ash removal system was investigated. The heat exchange enhancement effect and the resulting consequences were comprehensively considered. After comparing its results with the measured values, the model is considered valid. The numerical results indicate that: increasing air volume is an effective method to reduce ash discharge temperature but not desirable; the ash discharge temperature decreased from 452.47 K to 446.27 K, but the air outlet temperature also decreased by 6.05 K. Increasing the running speed of the conveyor belt is an ideal measure; the heat recovery coefficient improves by 7.53% as the speed increases from 0.046 m/s to 0.0766 m/s. In addition, a dry bottom ash removal system with a specific structure has rated ash handling capacity; its design should fully consider the amount of bottom ash discharge. Adjusting the operating mode may not significantly reduce the ash discharge temperature without other losses. The results provide a reference for designing and adjusting subsequent bottom ash sensible heat utilization equipment.
- Published
- 2023
- Full Text
- View/download PDF
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