122 results on '"Yan-Qing, Guo"'
Search Results
2. Entanglement Transfer and C-Not Gate Implemented in A Fiber Connected 3-Atom System
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Yao, Deng, Yan-Qing, Guo, Pei, Pei, Dian-Fu, Wang, and Dong, Mi
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Quantum Physics - Abstract
A robust scheme for unknown entangled state transfer and C-Not gate implemented between two spatially separated atoms is proposed. It is shown that, in the effective three-atom Ising model, two-atom unknown entangled state can be transferred from one pair of atoms to another deterministically by only repeating a simple operation of turning on/off local laser field applied on atom for two times at controlling time $\frac{\pi}{2\Omega_{0}}$. The whole time cost is less than $\frac{3\pi}{2\Omega_{0}}$. The successful probability and the fidelity are almost 100% for small atomic spontaneous emission rate. Deterministic two-atom C-Not gate can also be implemented in this model by just turning on/off the local laser field applied on the single target atom and leaving the controlling atom in its cavity alone for a while. The whole time cost is less than $\frac{\pi}{2\Omega_{0}}+\frac{3\pi \Delta}{2g^{2}}$. It is demonstrated that the scheme is insensitive to cavity leakage and fiber loss., Comment: 5 pages, 2 figures
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- 2015
3. Quantum state transfer between three ring-connected atoms
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Yan-Qing, Guo, Yao, Deng, Pei, Pei, and Dian-fu, Wang
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Quantum Physics - Abstract
A robust quantum state transfer scheme is discussed for three atoms that are trapped by separated cavities linked via optical fibers in ring-connection. It is shown that, under the effective three-atom Ising model, arbitrary quantum state can be transferred from one atom to another deterministically via an auxiliary atom with maximum unit fidelity. The only required operation for this scheme is replicating turning on/off the local laser fields applied to the atoms for two steps with time cost $\frac{\sqrt{2}\pi}{\Gamma_{0}}$. The scheme is insensitive to cavity leakage and atomic position due to the condition $\Delta \approx \kappa\gg g$. Another advantage of this scheme is that the cooperative influence of spontaneous emission and operating time error can reduce the time cost for maximum fidelity and thus speed up the implementation of quantum state transfer., Comment: 5 pages, 3 figures. arXiv admin note: text overlap with arXiv:0805.4493 by other authors
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- 2015
4. Ribosomal S6 protein kinase 4 promotes radioresistance in esophageal squamous cell carcinoma
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Li, Ming-Yang, Fan, Lin-Ni, Han, Dong-Hui, Yu, Zhou, Ma, Jing, Liu, Yi-Xiong, Li, Pei-Feng, Zhao, Dan-Hui, Chai, Jia, Jiang, Lei, Li, Shi-Liang, Xiao, Juan-Juan, Duan, Qiu-Hong, Ye, Jing, Shi, Mei, Nie, Yong-Zhan, Wu, Kai-Chun, Liao, Dezhong Joshua, Shi, Yu, Wang, Yan, Yan, Qing-Guo, Guo, Shuang-Ping, Bian, Xiu-Wu, Zhu, Feng, Zhang, Jian, and Wang, Zhe
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Protein kinases -- Health aspects ,Squamous cell carcinoma -- Health aspects ,Esophageal cancer -- Health aspects ,Health care industry - Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most aggressive cancers and is highly resistant to current treatments. ESCC harbors a subpopulation of cells exhibiting cancer stem-like cell (CSC) properties that contribute to therapeutic resistance including radioresistance, but the molecular mechanisms in ESCC CSCs are currently unknown. Here, we report that ribosomal S6 protein kinase 4 (RSK4) plays a pivotal role in promoting CSC properties and radioresistance in ESCC. RSK4 was highly expressed in ESCC CSCs and associated with radioresistance and poor survival in patients with ESCC. RSK4 was found to be a direct downstream transcriptional target of [DELTA]Np63[alpha], the main p63 isoform, which is frequently amplified in ESCC. RSK4 activated the [beta]-catenin signaling pathway through direct phosphorylation of GSK-3[beta] at Ser9. Pharmacologic inhibition of RSK4 effectively reduced CSC properties and improved radiosensitivity in both nude mouse and patient-derived xenograft models. Collectively, our results strongly suggest that the [DELTA]Np63[alpha]/RSK4/GSK-3[beta] axis plays a key role in driving CSC properties and radioresistance in ESCC, indicating that RSK4 is a promising therapeutic target for ESCC treatment., Introduction Esophageal cancer is one of the most frequently occurring cancers and ranks as the seventh leading cause of cancer-related mortality worldwide. Esophageal squamous cell carcinoma (ESCC) is the most [...]
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- 2020
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5. Arbitrary quantum state transfer under three parties participation
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Yan-Qing, Guo and Ying-Hui, Zhang
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Quantum Physics - Abstract
Arbitrary quantum state transfer(AQST) is discussed in a system that atoms are trapped in three separate cavities which are connected via optical fibers. Through three parties cooperation, the AQST can be selectively implemented deterministically. The target state can be transferred to any of the parties with 100 percent fidelity and $\frac{1}{2}$ success probability., Comment: 3 pages, 2 figures
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- 2010
6. Remote atom entanglement in a fiber-connected three-atom system
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Yan-Qing, Guo, Jing, Chen, and He-Shan, Song
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Quantum Physics - Abstract
An Ising-type atom-atom interaction is obtained in a fiber-connected three-atom system. The interaction is effective when $\Delta\approx \gamma _{0}\gg g$. The preparations of remote two-atom and three-atom entanglement governed by this interaction are discussed in specific parameters region. The overall two-atom entanglement is very small because of the existence of the third atom. However, the three-atom entanglement can reach a maximum very close to 1., Comment: 7 pages, 7 figures
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- 2008
7. Dynamic foraging strategy adaptation to heterogeneous environments contributes to social aggregation in snub-nosed monkeys.
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Lan Zhao, Sheng-Nan Ji, Xiao-Bing Du, Jia-Hui Liu, Bo-Lun Zhang, Pei-Hua Li, Yi-Jun Yang, Bao-Guo Li, Yan-Qing Guo, and Xiao-Guang Qi
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HABITAT selection ,MONKEYS ,SOCIAL context ,COLLECTIVE action ,TRAVEL costs ,COLD adaptation - Abstract
The dynamics of animal social structures are heavily influenced by environmental patterns of competition and cooperation. In folivorous colobine primates, prevailing theories suggest that larger group sizes should be favored in rainforests with a year-round abundance of food, thereby reducing feeding competition. Yet, paradoxically, larger groups are frequently found in high-altitude or high-latitude montane ecosystems characterized by a seasonal scarcity of leaves. This contradiction is posited to arise from cooperative benefits in heterogeneous environments. To investigate this hypothesis, we carried out a six-year field study on two neighboring groups of golden snubnosed monkey (Rhinopithecus roxellana), a species representing the northernmost distribution of colobine primates. Results showed that the groups adjusted their movement and habitat selection in response to fluctuating climates and spatiotemporal variability of resources, indicative of a dynamic foraging strategy. Notably, during the cold, resource-scarce conditions in winter, the large group occupied food-rich habitats but did not exhibit significantly longer daily travel distances than the smaller neighboring group. Subsequently, we compiled an ecobehavioral dataset of 52 colobine species to explore their evolutionary trajectories. Analysis of this dataset suggested that the increase in group size may have evolved via home range expansion in response to the cold and heterogeneous climates found at higher altitudes or latitudes. Hence, we developed a multi-benefits framework to interpret the formation of larger groups by integrating environmental heterogeneity. In cold and diverse environments, even smaller groups require larger home ranges to meet their dynamic survival needs. The spatiotemporal distribution of high-quality resources within these expanded home ranges facilitates more frequent interactions between groups, thereby encouraging social aggregation into larger groups. This process enhances the benefits of collaborative actions and reproductive opportunities, while simultaneously optimizing travel costs through a dynamic foraging strategy. [ABSTRACT FROM AUTHOR]
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- 2024
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8. PRDM1 expression via human parvovirus B19 infection plays a role in the pathogenesis of Hashimoto thyroiditis
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Wang, Lu, Zhang, Wei-Ping, Yao, Li, Zhang, Wei, Zhu, Jin, Zhang, Wei-Chen, Zhang, Yue-Hua, Wang, Zhe, Yan, Qing-Guo, Guo, Ying, Fan, Lin-Ni, Liu, Yi-Xiong, and Huang, Gao-Sheng
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- 2015
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9. Frequency-specific age-related changes in the amplitude of spontaneous fluctuations in autism
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Ting Mei, Zeng-Hui Ma, Yan-Qing Guo, Bin Lu, Qing-Jiu Cao, Xiao Chen, Liu Yang, Hui Wang, Xin-Zhou Tang, Zhao-Zheng Ji, Jing-Ran Liu, Ling-Zi Xu, Li-Qi Wang, Yu-Lu Yang, Xue Li, Chao-Gan Yan, and Jing Liu
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Pediatrics, Perinatology and Child Health ,Original Article - Abstract
BACKGROUND: Autism spectrum disorder is characterized by atypical developmental changes during brain maturation, but regional brain functional changes that occur with age and across different frequency bands are unknown. Therefore, the current study aimed to explore potential age and frequency band-related changes in the regional brain activities in autism. METHODS: A total of 65 participants who met the DSM-IV criteria for autistic disorder and 55 typically developed (TD) participants (both age 6–30 years) were recruited in the current study. The two groups were matched in age (t=−1.314, P=0.191) and gender (χ(2)=2.760, P=0.097). The amplitude of low-frequency fluctuations (ALFF) was employed to explore the effect of development on spontaneous brain activity in individuals with autism and in TD participants across slow-5 (0.01–0.027 Hz), slow-4 (0.027–0.073 Hz), and slow-3 (0.073–0.1 Hz) frequency bands. The diagnosis-by-age interaction effect in the whole brain voxels in autism and TD groups was investigated. RESULTS: Autism individuals showed significantly higher ALFF in the dorsal striatum in childhood (Caudate cluster: t=3.626, P=0.001; Putamen cluster: t=2.839, P=0.007) and remarkably lower ALFF in the dorsal striatum in adulthood (Caudate cluster: t=−2.198, P=0.038; Putamen cluster: t=−2.314, P=0.030) relative to TD, while no significant differences were observed in adolescence (all P>0.05). In addition, abnormal ALFF amplitudes were specific to the slow-4 (0.027–0.073 Hz) frequency band in the clusters above. CONCLUSIONS: The current study indicated abnormal development patterns in the spontaneous activity of the dorsal striatum in autism and highlighted the potential role of the slow-4 frequency band in the pathology of autism. Also, the potential brain mechanism of autism was revealed, suggesting that autism-related variations should be investigated in a specific frequency.
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- 2022
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10. Binding Patterns of Rotavirus Genotypes P[4], P[6], and P[8] in China with Histo-Blood Group Antigens.
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Xin Ma, Dan-di Li, Xiao-Man Sun, Yan-Qing Guo, Jing-Yao Xiang, Wei-Huan Wang, Li-Xia Zhang, Qing-Jiu Gu, and Zhao-Jun Duan
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Medicine ,Science - Abstract
Rotaviruses (RVs) are an important cause of severe gastroenteritis in children. It has been found that RV may recognize the histo-blood group antigens (HBGAs) as ligands or receptors and bind HBGAs in a type-dependent manner. In this study, we investigated the binding specificity of VP8* proteins from human rotaviruses (RV) that are prevalent in China including genotypes P[4], P[6], and P[8]. Through the saliva- and oligosaccharide-based binding assays, we found that the VP8* proteins of P[4] and P[8] RV showed similar reactivity with the Leb and H type 1 antigens, while P[6] RV weakly bound the Leb antigen. These findings may facilitate further research into RV host specificity and vaccine development.
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- 2015
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11. Real world effectiveness of PCSK-9 inhibitors combined with statins versus statins-based therapy among patients with very high risk of atherosclerotic cardiovascular disease in China (RWE-PCSK study)
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Yu-Qi, Liu, Dan-Dan, Li, Meng, Chai, Hong-Liang, Cong, Xiao-Qiang, Cong, Jun, Dai, Rong-Pin, DU, Ming, Gao, Jin-Cheng, Guo, Yan-Qing, Guo, Xiao-Jian, Hong, Rong-Chong, Huang, Feng-Shun, Jia, Jia-Yu, Li, Qing, Li, Jia-Mei, Liu, Xin-Ping, Liu, Yu-Guo, Liu, Hong-Gang, Nie, Bing, Shao, Xiao-Yu, Shen, Hai-Qing, Song, Yi-Jun, Song, Li-Jun, Wang, Shuo, Wang, Dong-Mei, Wu, Jing, Xia, Zhi-Yong, Yang, Hong-Ying, Yu, Hui, Zhang, Tie-Mei, Zhang, Ji-Yi, Zhao, Liang-Chen, Zhao, Ming-Qi, Zheng, and Yun-Dai, Chen
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The efficacy and safety of proprotein convertase subtilisin/kexin type 9 (PCSK-9) inhibitors were confirmed by several clinical trials, but its effectiveness in routine clinical practice in China has not been evaluated. This study aims to describe the real world effectiveness of PCSK-9 inhibitors combined with statins compared with statins-based therapy among patients with very high risk of atherosclerotic cardiovascular disease (ASCVD).This is a multi-center observational study, enrolled patients from 32 hospitals who underwent percutaneous coronary intervention (PCI) from January to June in 2019. There are 453 patients treated with PCSK-9 inhibitors combined with statins in PCSK-9 inhibitor group and 2,610 patients treated with statins-based lipid lowering therapies in statins-based group. The lipid control rate and incidence of major adverse cardiovascular events (MACE) over six months were compared between two groups. A propensity score-matched (PSM) analysis was used to balance two groups on confounding factors. Survival analysis using Kaplan-Meier methods was applied for MACE.In a total of 3,063 patients, 89.91% of patients had received moderate or high-intensity statins-based therapy before PCI, but only 9.47% of patients had low-density lipoprotein cholesterol (LDL-C) levels below 1.4 mmol/L at baseline. In the PSM selected patients, LDL-C level was reduced by 42.57% in PCSK-9 inhibitor group and 30.81% (In the real world, PCSK-9 inhibitors combined with statins could significantly reduce LDL-C levels among patients with very high risk of ASCVD in China. The long-term clinical benefits for patients received PCSK-9 inhibitor to reduce the risk of MACE is still unclear and requires further study.
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- 2021
12. Atypicalities in the developmental trajectory of cortico-striatal functional connectivity in autism spectrum disorder.
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Zeng-Hui Ma, Bin Lu, Xue Li, Ting Mei, Yan-Qing Guo, Liu Yang, Hui Wang, Xin-Zhou Tang, Zhao-Zheng Ji, Jing-Ran Liu, Ling-Zi Xu, Yu-Lu Yang, Qing-Jiu Cao, Chao-Gan Yan, and Jing Liu
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BRAIN physiology ,ACADEMIC medical centers ,CROSS-sectional method ,MAGNETIC resonance imaging ,AUTISM ,DESCRIPTIVE statistics ,INTELLECT - Abstract
The last decades of neuroimaging research has revealed atypical development of intrinsic functional connectivity within and between large-scale cortical networks in autism spectrum disorder, but much remains unknown about cortico-subcortical developmental connectivity atypicalities. This study examined cortico-striatal developmental intrinsic functional connectivity changes in autism spectrum disorder and explored how those changes may be correlated with autistic traits. We studied 49 individuals with autism spectrum disorder and 52 age-, sex-, and head motion–matched typically developing individuals (5–30 years old (14.0 ± 5.6)) using resting-state functional magnetic resonance imaging. Age-related differences in striatal intrinsic functional connectivity were compared between the two groups by adopting functional network–based parcellations of the striatum as seeds. Relative to typically developing individuals, autism spectrum disorder individuals showed atypical developmental changes in intrinsic functional connectivities between almost all striatal networks and sensorimotor network/ default network, with connectivity increasing with age in the autism spectrum disorder group and decreasing or constant in typically developing individuals. Age-related degree centrality and voxel-mirrored homotopic connectivity atypicalities in sensorimotor network/default network and voxel-mirrored homotopic connectivity disruptions in striatal regions were also observed in autism spectrum disorder. Significant correlations were found between cortico-striatal intrinsic functional connectivities and Autism Diagnostic Observation Schedule communication/repetitive and restricted-behavior subscores in autism spectrum disorder. Our results indicated that developmental atypicalities of cortico-striatal intrinsic functional connectivities might contribute to the neuropathology of autism spectrum disorder. [ABSTRACT FROM AUTHOR]
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- 2022
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13. Real world effectiveness of PCSK-9 inhibitors combined with statins versus statins among patients with very high risk of atherosclerotic cardiovascular disease in China (RWE-PCSK study)
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Xin-Ping Liu, Qing Li, Bin Shao, Jun Dai, Hong-Gang Nie, Meng Chai, Ming Gao, Dandan Li, Hong-Ying Yu, Hong-Liang Cong, Hui Zhang, Yundai Chen, Tie-Mei Zhang, Liang-Chen Zhao, Ji-Yi Zhao, Xiao-Jian Hong, Rong-Chong Huang, Yan-Qing Guo, Xiao-Yu Shen, Dong-Mei Wu, Zhi-Yong Yang, Jin Xia, Xiao-Qiang Cong, Jin-Cheng Guo, Jia-Yu Li, Hai-Qing Song, Yi-Jun Song, yuqi liu, Shuo Wang, Jia-Mei Liu, Ming-Qi Zheng, Fenshun Jia, Yu-Guo Liu, Li-Jun Wang, and Rongping Du
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Incidence (epidemiology) ,Confounding ,Percutaneous coronary intervention ,Clinical trial ,Internal medicine ,Conventional PCI ,Medicine ,business ,Prospective cohort study ,Very high risk ,Survival analysis - Abstract
Background The efficacy and safety of PCSK-9 inhibitors were confirmed by several clinical trials, but its effectiveness in routine clinical practice in China is unknown. Objective To describe the real world effectiveness of initiated with PCSK-9 inhibitors combined with statins compared with statins among patients with very high risk of ASCVD and underwent percutaneous coronary intervention (PCI). Methods This is a prospective study, enrolled patients from 32 hospitals between January to June 2019. The lipid control rate and incidence of cardiovascular events over 6 months were compared between two groups. A propensity score-matched analysis was used to balance two groups on confounding factors. Survival analysis using Kaplan-Meier methods was applied for cardiovascular events. Results In a total of 3063 patients, 89.91% had received moderate or high-intensity statin therapy before PCI, but only 9.47% had LDL levels below 1.4mmol/L at baseline. In the PSM selected patients, LDL level was reduced by 42.57% in PCSK-9 inhibitor group and 30.81% (P
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- 2020
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14. Invasive cancers are not necessarily from preformed in situ tumours — an alternative way of carcinogenesis from misplaced stem cells
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Wang, Rui-An, Li, Zeng-Shan, Zhang, Hui-Zhong, Zheng, Ping-Ju, Li, Qin-Long, Shi, Jian-Guo, Yan, Qing-Guo, Ye, Jing, Wang, Jing-Bo, Guo, Ying, Huang, Xiao-Feng, and Yu, Ying-Hao
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- 2013
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15. A proof of the Kochen–Specker theorem can always be converted to a state-independent noncontextuality inequality
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Xiao-Dong Yu, Yan-Qing Guo, and D M Tong
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Kochen-Specker theorem ,noncontextuality inequality ,quantum contextuality ,03.65.Ta ,03.65.Ud ,Science ,Physics ,QC1-999 - Abstract
Quantum contextuality is one of the fundamental notions in quantum mechanics. Proofs of the Kochen–Specker theorem and noncontextuality inequalities are two means for revealing the contextuality phenomenon in quantum mechanics. It has been found that some proofs of the Kochen-Specker theorem, such as those based on rays, can be converted to a state-independent noncontextuality inequality, but it remains open whether this is true in general, i.e., whether any proof of the Kochen-Specker theorem can always be converted to a noncontextuality inequality. In this paper, we address this issue. We prove that all kinds of proofs of the Kochen-Specker theorem, based on rays or any other observables, can always be converted to state-independent noncontextuality inequalities. Besides, our constructive proof also provides a general approach for deriving a state-independent noncontextuality inequality from a proof of the KS theorem.
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- 2015
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16. Rectal Carcinoma Metastatic to the Male Breast after 7 Years: Case Report
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Wang, Ting, Lv, Yong-Gang, Yan, Qing-Guo, Yuan, Shi-Fang, Ling, Rui, Chen, Jiang-Hao, Chen, Lin, Yi, Jun, and Wang, Ling
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- 2011
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17. [Untitled]Effects of different exercise time and methods on the activities of mitochondrial respiratory chain complexes I and IV from rat skeletal muscles
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Yan-qing, Guo, Min, Zhang, Xiao-li, Zhao, Li-yan, Wang, Ying, Cao, Gong-yuan, Yu, and Hai-dong, Li
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- 2011
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18. [Untitled]Effects of different exercise time and methods on the activities of mitochondrial respiratory chain complexes I and IV from rat skeletal muscles
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Yan-qing, Guo, Min, Zhang, Xiao-li, Zhao, Li-yan, Wang, Ying, Cao, Gong-yuan, Yu, and Hai-dong, Li
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- 2011
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19. Joint statistics matching for camera model identification of recompressed images
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Yan Qing Guo, Ming Li, Bo Wang, Ya Bin Li, and Xue Sui
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Computer science ,Feature vector ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,02 engineering and technology ,Discriminative model ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,Quantization (image processing) ,business.industry ,Applied Mathematics ,Dimensionality reduction ,05 social sciences ,System identification ,Pattern recognition ,General Medicine ,computer.file_format ,JPEG ,Computational Mathematics ,Modeling and Simulation ,020201 artificial intelligence & image processing ,Artificial intelligence ,General Agricultural and Biological Sciences ,business ,computer ,050203 business & management ,Subspace topology ,Image compression - Abstract
Source camera identification has been well studied in laboratory environment where the training and test samples are all original images without recompression. However, image compression is quite common in the real world, when the training and test images are double JPEG compressed with different quantization tables, the identification accuracy of existing methods decreases dramati- cally. To address this challenge, we propose a novel iterative algorithm namely joint first and second order statistics matching (JSM) to learn a feature projection that projects the training and test fea- tures into a low dimensional subspace to reduce the shift caused by image recompression. Inspired by transfer learning, JSM aims to learn a new feature representation from original feature space by simultaneously matching the first and second order statistics between training and test features in a principled dimensionality reduction procedure. After the feature projection, the divergence between training and test features caused by recompression is reduced while the discriminative properties are preserved. Extensive experiments on public Dresden Image Database verify that JSM significantly outperforms several state-of-the-art methods on camera model identification of recompressed images.
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- 2019
20. Investigation of Structural, Optical an Electrical Characterization of AZO Films Used for Solar Cells
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Zhen Xu Lin, Yi Zhang, Chao Song, Jie Song, Yan Qing Guo, Xiang Wang, and Rui Huang
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Materials science ,Band gap ,Annealing (metallurgy) ,business.industry ,Mechanical Engineering ,Sputter deposition ,Crystallinity ,Electrical resistance and conductance ,Mechanics of Materials ,Electrical resistivity and conductivity ,Optoelectronics ,General Materials Science ,Thin film ,business ,Transparent conducting film - Abstract
Transparent conductive Al-doped ZnO (AZO) thin films used as transparent conductive oxide (TCO) electrode layers for thin film solar cells were deposited on quartz substrate by radio frequency (RF) magnetron sputtering. After deposition, the samples were annealed at various temperatures. The structural, electrical, and optical properties of these films have been analyzed as a function of the annealing temperature. All of these samples exhibit strong (002) diffraction peaks and the average transmittance in visible range is about 85%. The crystallinity of films together with some changes of the electrical resistance has been improved after thermal annealing. The best characteristics have been obtained at 400 °C, where the lowest resistivity is 2.4×10-3 Ω cm and the optical band gap is 3.22 eV.
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- 2016
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21. Saccharothrix stipae sp. nov., an actinomycete isolated from the rhizosphere of Stipa grandis
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Dan Hong Dong, Yan Qing Guo, Xiao Hui Di, Gehong Wei, Miao Chun Fan, and Yanbing Lin
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0106 biological sciences ,0301 basic medicine ,Alanine ,chemistry.chemical_classification ,Rhizosphere ,Strain (chemistry) ,Rhamnose ,Fatty acid ,General Medicine ,Biology ,16S ribosomal RNA ,010603 evolutionary biology ,01 natural sciences ,Microbiology ,Amino acid ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,chemistry ,Botany ,Glycine ,Ecology, Evolution, Behavior and Systematics - Abstract
An actinomycete, strain D34T, was isolated from a soil sample collected from the rhizosphere of Stipa grandis at Yunwu Mountain in Ningxia, north-west China. Strain D34T showed highest 16S rRNA gene sequence similarity to Saccharothrix espanaensis DSM 44229T (99.0 %), Saccharothrix texasensis NRRL B-16107T (98.7 %) and Saccharothrix variisporea NRRL B-16296T (98.6 %). The strain contained meso-diaminopimelic acid, alanine, glycine and glutamic acid as major cell-wall amino acids. Mannose, rhamnose and galactose were the characteristic whole-cell sugars. The fatty acid profile consisted predominantly of iso-C15 : 0, iso-C16 : 0, iso-C16 : 1, C17 : 1ω6c, anteiso-C17 : 0 and anteiso-C15 : 0. The phospholipid profile included phosphatidylethanolamine (typical of phospholipid pattern type II). Furthermore, a combination of some physiological and biochemical properties and low DNA–DNA relatedness values indicated that strain D34T was differentiated from members of closely related species. On the basis of these phenotypic, genotypic and chemotaxonomic data, strain D34T represents a novel species of the genus Saccharothrix, for which the name Saccharothrix stipae sp. nov. is proposed. The type strain is D34T ( = JCM 30560T = ACCC19714T).
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- 2016
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22. An Online Teaching Exploration of 'Keeping on Studying while Schools are Closed' in Primary and Middle Schools
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Yan-qing Guo and Lu Zhao
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Primary (chemistry) ,Mathematics education ,Online teaching ,Sociology - Published
- 2018
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23. Altered Developmental Trajectories in Intrinsic Function between Default, Salience, and Executive Networks in High-Functioning Autism
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Liu Yang, Xiao Chen, Xue Li, Yang-Qian Shen, Hui Wang, Jing-Ran Liu, Ting Mei, Zhao-Zheng Ji, Yan-Qing Guo, Fei-Fei Wang, Ling-Zi Xu, Xin-Zhou Tang, Zeng-Hui Ma, Li-Qi Wang, Jing Liu, Qing-Jiu Cao, and Chao-Gan Yan
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medicine.disease ,behavioral disciplines and activities ,High-functioning autism ,medicine.anatomical_structure ,Autism spectrum disorder ,Posterior cingulate ,medicine ,Autism ,Psychology ,Neurocognitive ,Insula ,Neuroscience ,Default mode network ,Anterior cingulate cortex - Abstract
Although many studies have focused on abnormal patterns of brain functional connectivity in Autism spectrum disorder (ASD), one important factor, the developmental effect of brain networks was largely overlooked. To clarify the abnormal developmental trajectory of brain functional connectivity in ASD, we focused on the age-related changes in three “core” neurocognitive networks: default mode network (DMN), salience network (SN) and central executive network (CEN, also divided into left and right CEN, i.e., lCEN and rCEN). The development of intrinsic functional connectivity (iFC) within and between these networks were analyzed in 107 Chinese participants, including children, adolescents, and adults (54 patients with ASD and 53 typically developed (TD) participants; ages 6-30 years). We found that diagnosis-related distinctions in age-related changes suggest three maturation patterns in networks’ or nodes’ iFC: delayed (iFC between SN and rCEN), ectopic (iFC between SN and DMN, and iFC between posterior cingulate cortex (PCC) and right anterior insula/dorsal anterior cingulate cortex (dACC)), and failure maturation (iFC between dACC and ventral medial prefrontal cortex). Compared with age-matched TD participants, ASD patients in children and adolescents exhibited hypo-connectivity, while that in adults showed hyper-connectivity. In addition, an independent verification based on Autism Brain Imaging Data Exchange (ABIDE) datasets confirmed our findings of developmental trajectories in ASD group, which also showed unchanged functional connectivity with age between DMN and SN and increasing iFC between rCEN and SN. The conspicuous differences in the development of three “core” networks in ASD were demonstrated, which may lead a nuanced understanding towards the abnormal brain network maturation trajectory of autism.
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- 2018
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24. Activation of the NF-κB Pathway and Heterozygous Deletion of TNFAIP3 (A20) Confer Superior Survival in Extranodal Natural Killer/T-Cell Lymphoma, Nasal Type
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Liu, Fang, primary, Zheng, Jun-Ping, additional, Wang, Lu, additional, Zhao, Dan-Hui, additional, Li, Ming-Yang, additional, Wang, Ying-Mei, additional, Liu, Yang, additional, Ma, Jing, additional, Zeng, Nai-Yan, additional, Liu, Hong-Xiang, additional, Liang, Rong, additional, Guo, Shuang-Ping, additional, Wang, Zhe, additional, and Yan, Qing-Guo, additional
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- 2019
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25. Effects of β3-adrenoceptor activation on expression of pancreatic adrenoceptors and angiotensin II receptors in ApoE−/− mice
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Yan-qing Guo, Jiang Zhi-li, Yan-fang Li, and Jun-Ying Song
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Blood Glucose ,Male ,Apolipoprotein E ,Agonist ,medicine.medical_specialty ,Angiotensin receptor ,medicine.drug_class ,medicine.medical_treatment ,Adrenergic beta-3 Receptor Agonists ,Biology ,Receptor, Angiotensin, Type 2 ,Mice ,Apolipoproteins E ,Internal medicine ,medicine ,Animals ,Insulin ,RNA, Messenger ,Receptor ,Pancreas ,Pharmacology ,Angiotensin II receptor type 1 ,Angiotensin II ,Mice, Inbred C57BL ,medicine.anatomical_structure ,Endocrinology ,Gene Expression Regulation ,Receptors, Adrenergic, beta-3 ,Adrenergic beta-3 Receptor Antagonists - Abstract
Hyperlipidemia can be harmful to the pancreas and β3-adrenoceptor agonist can improve lipid metabolism disorder. We aimed to study the effects of β3-adrenoceptor activation on glucose, insulin and the expression of pancreatic adrenoceptors and angiotensin II receptors. Ten C57BL/6J mice at the age of 10 weeks served as normal control, and forty age-matched apolipoprotein E knockout (ApoE(-/-)) mice were randomly divided into hyperlipidaemia model group, low-dose and high-dose β3-adrenoceptor agonist group and β3-adrenoceptor antagonist group. After 26 weeks of high-fat diet, treatments were given for 12 weeks. Serum glucose and insulin levels in 48 weeks old mice were measured using an automatic biochemical detector. Quantitative rt-PCR and Western blot were used to analyze the mRNA and protein expression of α1A-, α2A-, β2-, β3-adrenoceptors and angiotensin II type 1 and type 2 receptors in pancreas. We found that β3-adrenoceptor agonist could decrease serum glucose and insulin levels in aged ApoE(-/-) mice (P0.01) and down-regulate the expression of α1A-adrenoceptor and angiotensin II type 1 receptor which were significantly increased in model mice (P0.05, P0.01). Compared with the model mice, α2A-, β2-, β3-adrenoceptor and angiotensin II type 2 receptor expression were up-regulated in β3-adrenoceptor agonist treat mice (P0.05, P0.01). These results suggest that chronic β3-adrenoceptor activation regulated the expression of adrenoceptors and angiontensin II receptors towards contrary direction, which indicates that there are interactions between β3-adrenoceptor and subtypes of adrenoceptor and angiotensin II receptor, and these interactions may play a protective role in pancreas and improve glucose metabolism disorders.
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- 2015
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26. Information visualization analysis on Advances in Psychological Science : 1983-2014
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Xiao Zheng, Mimi Li, Xiao-Jie Pan, Lihong Hou, Yaqing Xue, Huining Zhao, Chichen Zhang, and Yan-Qing Guo
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Psychological science ,business.industry ,Psychological research ,05 social sciences ,Library science ,General Medicine ,Bibliometrics ,050905 science studies ,Chinese academy of sciences ,Field (geography) ,Information visualization ,Cooperative development ,0509 other social sciences ,050904 information & library sciences ,business ,Psychology - Abstract
Objective To describe the revolution and research status of Advances in Psychological Science . Methods A total of 3060 articles published in Advances in Psychological Science from 1983 to 2014 were analyzed with the information visualization method using Citespace software from the aspects of publications, cited frequency and downloads, funding, organizations, authors and keywords. Results The results showed that the amount of literature published annually had an upward tendency, and 49.4% of the papers were supported by national or provincial projects. Institutions such as the Chinese Academy of Sciences (CAS) and the normal universities were rated in the forefront of the scientific research output. Xiting Huang, Hong Li and Yuejia Luo were at the top of the list of prolific authors. Conclusions A new pattern of cooperative development of the theory and application in the field of psychological research is forming.
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- 2017
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27. Enhancing coherence of a state by stochastic strictly incoherent operations
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Yan-Qing Guo, D. M. Tong, and C. L. Liu
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Physics ,Mathematical optimization ,Quantum Physics ,FOS: Physical sciences ,State (functional analysis) ,Coherence (statistics) ,01 natural sciences ,010305 fluids & plasmas ,Norm (mathematics) ,0103 physical sciences ,Coherent states ,Statistical physics ,010306 general physics ,Quantum Physics (quant-ph) - Abstract
In this paper, we address the issue of enhancing coherence of a state under stochastic strictly incoherent operations. Based on the $l_1$ norm of coherence, we obtain the maximal value of coherence that can be achieved for a state undergoing a stochastic strictly incoherent operation and the maximal probability of obtaining the maximal coherence. Our findings indicate that a pure state can be transformed into a maximally coherent state under a stochastic strictly incoherent operation if and only if all the components of the pure state are nonzero while a mixed state can never be transformed into a maximally coherent state under a stochastic strictly incoherent operation., Comment: 7 pages
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- 2017
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28. Effects of beta3-adrenoceptor activation on the interaction between adrenoceptors and angiotensin II receptors in apolipoprotein E knockout mouse lung
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Jun-Ying Song, Zhi-li Jiang, Yan-fang Li, and Yan-qing Guo
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Male ,Agonist ,Apolipoprotein E ,Aging ,medicine.medical_specialty ,Angiotensin receptor ,medicine.drug_class ,Adrenergic beta-3 Receptor Agonists ,Hyperlipidemias ,Biology ,Receptor, Angiotensin, Type 2 ,Receptor, Angiotensin, Type 1 ,Mice ,chemistry.chemical_compound ,Apolipoproteins E ,Internal medicine ,Hyperlipidemia ,medicine ,Animals ,RNA, Messenger ,Receptor ,Lung ,Triglycerides ,Mice, Knockout ,Pharmacology ,Receptors, Angiotensin ,Angiotensin II receptor type 1 ,Cholesterol ,Cholesterol, LDL ,medicine.disease ,Angiotensin II ,Receptors, Adrenergic ,Mice, Inbred C57BL ,Endocrinology ,chemistry ,Receptors, Adrenergic, beta-3 ,Adrenergic beta-3 Receptor Antagonists - Abstract
Hyperlipidemia can be harmful to the lung and β3-adrenoceptor agonist can improve lipid metabolism disorders. In this study, we aim to investigate the effects of β3-adrenoceptor activation on the interactions of adrenoceptors and angiotensin II receptors in aged apolipoprotein E gene knockout (ApoE(-/-)) mouse lung. Ten wild type C57BL/6J mice were included as normal control, 40 ApoE(-/-) mice were randomly divided into hyperlipidemia model (saline), low dose and high dose β3-adrenoceptor agonist and β3-adrenoceptor antagonist groups. After 26 weeks of high-fat diet, treatments were given for 12 weeks. Total cholesterol (TC), triglycerides (TG) and low-density lipoprotein cholesterol (LDL-C) were examined by an automatic biochemical analyzer. Quantitative real-time PCR and Western blot were used to analyze the mRNA and protein expression of α1A-, α1B-, α2A-, β1-, β2-, β3-adrenoceptors and angiotensin II type 1 and type 2 receptors in lung. We found that β3-adrenoceptor agonist could decrease TG, TC and LDL-C in aged ApoE(-/-) mice (P
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- 2014
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29. A Disguised Switch for Two-Qubit Gates of a Hybrid Quantum Processing Unit
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Yan-Qing Guo, Feng-yang Zhang, Jiasen Jin, and Pei Pei
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Quantum network ,Physics and Astronomy (miscellaneous) ,Computer science ,General Mathematics ,Quantum sensor ,Quantum Physics ,One-way quantum computer ,Computer Science::Emerging Technologies ,Quantum gate ,Quantum error correction ,Quantum mechanics ,Qubit ,Electronic engineering ,Hardware_ARITHMETICANDLOGICSTRUCTURES ,Quantum information science ,Quantum computer - Abstract
The key mechanism which enables two-qubit operations of a hybrid quantum processing unit for hybrid quantum computing is demonstrated. A scheme which realizes a disguised switch for two-qubit gating is proposed, combining external magnetic field control, quantum dot sample tuning, and assisted laser control. Our methods overcome the limitation of asynchrony between single-qubit operations of respective solid-state qubits and improve the efficiency of single-qubit gating.
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- 2014
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30. Limit Analyisis of Frame Structure Based on the Elastic Modulus Reduction Method
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Yan Qing Guo, Dan Dan Zeng, Qiu Hua Duan, and Yue Jing Luo
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Bulk modulus ,Specific modulus ,business.industry ,Mathematical analysis ,Linear elasticity ,Young's modulus ,General Medicine ,Structural engineering ,symbols.namesake ,Tangent modulus ,symbols ,Bending moment ,Limit load ,business ,Elastic modulus ,Mathematics - Abstract
An efficient linear elastic iterative finite element method, namely, the elastic modulus reduction method is introduced to calculate limit load of frame structure. The elastic modulus reduction method defines the element bearing ratio on the basis of the generalized yield criterion and the strain energy equilibrium principle. Because the bending moment is the main factor inducing the frame structure damage, the element bearing ratio only considering the bending moment yield is proposed. Numerical examples demonstrate the applicability and precision of the elastic modulus reduction method for limit analysis of frame structures.
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- 2014
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31. Effect of angiotensin receptor neprilysin inhibitor on ventricular remodeling after myocardial infarction in rats.
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Ye Du, Jian An, Yan-Qing Guo, Qing-Bo Bao, and Xiao-Hong Li
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ANGIOTENSIN receptors ,NEPRILYSIN ,VENTRICULAR remodeling ,ECHOCARDIOGRAPHY ,FIBROSIS - Abstract
Objective: To investigate the effect of Angiotensin Receptor Neprilysin Inhibitor (ARNI) on ventricular remodeling after AMI in rats. Methods: Sixty male SD rats were randomly divided into Control group, AMI group, AMI-valsartan group, AMI-ARNI group,15 rats in each group, ligating the left coronary anterior descending artery to establish the rat model of AMI. Valsartan group and ARNI group were treated with valsartan (34mg / kg / day) and ARNi (68mg / kg / day) for 6 weeks, the Control group and AMI group were given the same amount of normal saline. LVIDd, LVIDs, EF were measured by color doppler echocardiography before and 6 weeks after treatment. After 6 weeks, the rats were sacrificed, the hearts were weighed, then myocardial tissue Masson staining was performed to calculate the collagen volume fraction (CVF). Results: compared with the control group, LVIDs increased significantly with the reduction of EF in the AMI group, valsartan group and ARNI group (P<0.05). After 6 weeks of treatment, compared with the AMI group, LVIDd and LVIDs both reduced significantly with the increase of EF in the ARNI group (P<0.05). Compared with the control group, the left ventricular weight, right ventricular weight and atrial weight all increased significantly in the AMI group, valsartan group, and ARNI group (P<0.05); compared with the AMI group, the left ventricular weight, right ventricular weight, atrial weight and CVF reduced significantly in the valsartan group and ARNI group (P<0.05); compared with the valsartan group, the left ventricular weight and CVF further reduced in the ARNI group. (P<0.05).Conclusions: ARNI has the effect of reversing ventricular remodeling after AMI in rats, which can reduce left ventricular volume, increase myocardial contractility, and inhibit myocardial cell hypertrophy and fibrosis. [ABSTRACT FROM AUTHOR]
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- 2020
32. Effects of β3-adrenoceptor on scavenger receptor class B type 1 and its signal transduction pathway in apolipoprotein E knockout mice
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Yan-qing Guo, Yan-fang Li, and Zhao-hong Wang
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Pharmacology ,Apolipoprotein E ,Agonist ,medicine.medical_specialty ,medicine.drug_class ,Blood lipids ,Lipid metabolism ,Biology ,Endocrinology ,Internal medicine ,medicine ,lipids (amino acids, peptides, and proteins) ,Scavenger receptor ,Signal transduction ,Protein kinase A ,Lipoprotein - Abstract
It is clear that activated β3-adrenoceptor can improve disorders of lipid metabolism, however there are few reports concerning the anti-atherosclerotic effects of β3-adrenoceptor in the artery of apolipoprotein E knockout (Apoe−/−) mice. In the present study, we aimed at investigating the effects of β3-adrenoceptor on lipids, atherosclerosis plaques, scavenger receptor class B type 1 and its signal transduction in Apoe−/− mice. Ten C57BL/6J mice were used as a control, and fifty age-matched Apoe−/− mice were randomly divided into five groups: atherosclerotic model (saline), positive control (atorvastatin), low-dose β3-adrenoceptor agonist, high-dose β3-adrenoceptor agonist and β3-adrenoceptor antagonist groups. After 26 weeks on the high-fat diet, the mice received the above treatments for 12 weeks. Thoracic aortas, serum lipids, SR-B1, P-MeK1/2, P-ErK1/2 and protein kinase Cα(PKCα) activity were detected. We found that the levels of serum total cholesterol, triglyceride, very low-density lipoprotein/low-density lipoprotein cholesterol and the area of atherosclerotic plaques were significantly decreased in β3-adrenoceptor agonist-treated mice (P
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- 2013
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33. β3-Adrenoceptor activation attenuates atherosclerotic plaque formation in ApoE−/− mice through lowering blood lipids and glucose
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Zhao-hong Wang, Yan-fang Li, and Yan-qing Guo
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Blood Glucose ,Male ,medicine.medical_specialty ,Normal diet ,Atorvastatin ,medicine.medical_treatment ,Blood lipids ,Adrenergic beta-3 Receptor Agonists ,Mice ,Random Allocation ,chemistry.chemical_compound ,Apolipoproteins E ,Insulin resistance ,Fibrosis ,Internal medicine ,Hyperlipidemia ,medicine ,Animals ,Pharmacology (medical) ,Mice, Knockout ,Pharmacology ,Cholesterol ,Insulin ,Cholesterol, HDL ,General Medicine ,medicine.disease ,Lipids ,Plaque, Atherosclerotic ,Mice, Inbred C57BL ,Endocrinology ,chemistry ,Ethanolamines ,Receptors, Adrenergic, beta-3 ,Original Article ,lipids (amino acids, peptides, and proteins) ,medicine.drug - Abstract
To examine the effects of β3-adrenoceptor (β3-AR) activation on atherosclerotic plaque development in ApoE(-/-) mice.Thirty six week-old male ApoE(-/-) mice on a high-fat diet were treated with atorvastatin (10 mg·kg(-1)·d(-1), po), BRL37344 (β3-AR agonist, 1.65 or 3.30 μg/kg, ip, twice a week) or SR52390A (β3-AR antagonist, 50 μg/kg, ip, twice a week) for 12 weeks. Wild-type C57BL/6J mice receiving a normal diet were taken as healthy controls. At the end of the treatments, serum levels of triglycerides (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), non-high density lipoprotein cholesterol (nHDL-C), glucose and insulin were measured. The thoracic aortas were dissected out, the area of atherosclerotic plaques and extent of fibrosis in the plaques were examined using HE and Masson's trichome staining, respectively.Compared to wild-type mice, ApoE(-/-) mice fed on a high-fat diet exhibited prominent hyperlipidemia and insulin resistance, associated with large area of atherosclerotic plaques and great extent of fibrosis in aortas. Atorvastatin significantly decreased the serum levels of TC and nHDL-C, and reduced the plaque area and collagen content in aortas. BRL37344 significantly decreased the serum levels of TG, TC, nHDL-C, glucose and insulin, and increased HDL-C and the insulin sensitivity, and dose-dependently reduced the plaque area and collagen content in aortas. SR52390A treatment did not affect any parameters studied.The β3-AR agonist impedes the progression of atherosclerosis in ApoE(-/-) mice, through improvement of the lipid and glucose profiles.
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- 2013
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34. [Effects of water-potassium interaction on stalk structure and function of high-yield summer maize]
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Yan-qing, Guo, Yu-ling, Zhu, Kai, Liu, Shu-jun, Pei, Bin, Zhao, and Ji-wang, Zhang
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Plant Stems ,Potassium ,Water ,Zea mays ,Droughts - Abstract
The effects of water-potassium interaction on stalk structure and function of high-yield summer maize were studied in the waterproof cultivation pools with Zhengdan 958 (ZD958) as the experimental material. The results showed that the quantity of bleeding sap in stalk was significantly improved by irrigation. Potassium (K) application could reduce the influence of drought stress on the quantity of bleeding sap in stalk to a certain extent. The quantity of bleeding sap in stalks during different growth periods were significantly improved in the treatment of 2250 m³ · hm⁻²2 irrigation amount with K application. The stalk rind penetration strength and stem diameter were significantly improved by water-potassium interactions. Under the irrigation amount of 2250 m³ · hm⁻², the stalk rind penetration strength and stem diameter with K application were respectively increased by 46.0% and 36.4% compared with no K application. Under K application, the stalk rind penetration strength and stem diameter in the irrigation amount 2250 m³ · hm⁻² were respectively increased by 30.7% and 8.6% compared with 450 m³ · hm⁻². The number, area of vascular bundle and the thickness of thick-walled cell, cortex and rind, were significantly improved by the irrigation amount 2250 m³ · hm⁻² with K application. In conclusion, application of 180 kg K₂O · hm⁻² and increasing the irrigation amount properly could increase the lodging resistance and yield of summer maize in this field experiment condition.
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- 2016
35. Mental health and related influencing factors among the empty-nest elderly and the non-empty-nest elderly in Taiyuan, China: a cross-sectional study
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Xiao Zheng, Xiao-Jie Pan, Chichen Zhang, Jianzhong Zheng, Yan-Qing Guo, and Huang Huang
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Gerontology ,Male ,China ,Cross-sectional study ,03 medical and health sciences ,0302 clinical medicine ,Quality of life ,Risk Factors ,Psychoticism ,Surveys and Questionnaires ,Medicine ,Humans ,030212 general & internal medicine ,Risk factor ,Aged ,Aged, 80 and over ,Family Characteristics ,030505 public health ,business.industry ,Mental Disorders ,Public Health, Environmental and Occupational Health ,Regression analysis ,social sciences ,General Medicine ,Middle Aged ,Mental health ,humanities ,Cross-Sectional Studies ,Mental Health ,Population study ,Female ,0305 other medical science ,business ,Demography - Abstract
Objective In China, elderly make up a large proportion of the society, but their mental health is often overlooked. The aim of this study is to compare mental health and related influencing factors among the empty-nest and the non-empty-nest elderly, and attain the purpose of improving their quality of life. Study design Cross-sectional survey. Methods A cross-sectional survey was conducted among 488 elderly people aged 60–92 years in six districts of Taiyuan, China. A demographic questionnaire and SCL-90-R were employed to collect demographic variables and evaluate mental health, respectively. Multiple regression analysis was performed to estimate factors related to mental health of the elderly. Results The empty-nest elderly were mostly male, married, higher education level, higher income and living in urban areas. The scores of SCL-90-R among the empty-nest elderly were lower than those of the non-empty-nest elderly except for psychoticism. Comparing with scores of national norms, some dimension of SCL-90-R had statistically significant differences. Multiple regression analysis showed that the main risk factors of the empty-nest elderly were gender and income, whereas the main risk factor of the non-empty-nest elderly was chronic diseases. Conclusion The mental health status of the empty-nest elderly was better than that of the non-empty-nest elderly. Overall mental health of the study population was at a high level compared with national norms. The elderly who were male, with younger age, having higher income, and without chronic diseases had better mental health status.
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- 2016
36. Microstructures and Photoluminescence of a-Si:H/a-SiNx Multilayers Annealed at Different Temperature
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Xiang Wang, Jie Song, Yan Qing Guo, Chao Song, and Rui Huang
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Photoluminescence ,Materials science ,Hydrogen ,Annealing (metallurgy) ,Mechanical Engineering ,Analytical chemistry ,chemistry.chemical_element ,Microstructure ,chemistry ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,General Materials Science ,Fourier transform infrared spectroscopy ,Luminescence ,Spectroscopy - Abstract
Series of a-Si:H/a-SiNx multilayers were prepared by very high frequency plasma enhanced chemical vapor deposition system. As-deposited samples were thermally annealed at the various temperatures. The effects of thermal annealing on the properties of luminescence were investigated. The photoluminescence intensity of the film annealed at 600 °C is found to be higher than that of the film without annealing. However, with further increasing the annealing temperature from 600 °C to 800 °C, the photoluminescence intensity of the film rapidly decreases. Fourier transform infrared spectroscopy and Raman-scattering spectroscopy were used to study the changes of the microstructures and bonding configurations. Based on the measurements of structural and bonding configurations, the improved photoluminescence intensity is attributed to the forming of radiative defect states caused by the effusion of hydrogen in the films.
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- 2012
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37. Evolution of Defect Photoluminescence in Annealed N-Rich a-SiNx:H Films
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Jie Song, Xiang Wang, Rui Huang, Yan Qing Guo, and Chao Song
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Photoluminescence ,Materials science ,business.industry ,Annealing (metallurgy) ,Mechanical Engineering ,Pl spectra ,Analytical chemistry ,Dangling bond ,chemistry.chemical_element ,Nitrogen ,chemistry.chemical_compound ,chemistry ,Silicon nitride ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,Optoelectronics ,General Materials Science ,business ,Luminescence - Abstract
The N-rich a-SiNx:H films were deposited on Si substrates by very high frequency plasma enhanced chemical vapor deposition technique at a low temperature of 250 °C. Strong blue photoluminescence (PL), which originates from nitrogen dangling bond, can be observed in the as-deposited samples. The dependence of defect PL on annealing temperature was systematically investigated. The PL spectra reveal that the PL peak is almost independent of the annealing temperatures while the luminescence intensity rapidly decreases with the annealing temperature increasing from 400°C to 600°C. However, higher annealing temperatures over 700 °C results in an enhancement of luminescence intensity. Based on the relationship between PL spectra and bonding configurations of the samples, the evolution of defect PL with annealing temperatures was briefly discussed.
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- 2012
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38. Abnormal Capacitance Hysteresis Phenomena in Stacked Nanocrystalline-Si Based Metal Insulator Semiconductor Memory Structure
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Rui Huang, Jie Song, Xiang Wang, Yan Qing Guo, and Song Chao
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Materials science ,business.industry ,Mechanical Engineering ,Electrical engineering ,Semiconductor memory ,Capacitance ,Nanocrystalline material ,Hysteresis ,Stack (abstract data type) ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,Deposition (phase transition) ,Optoelectronics ,General Materials Science ,business ,Layer (electronics) - Abstract
Stack nanocrystalline-Si (nc-Si) based metal insulator semiconductor memory structure was fabricated by plasma enhanced chemical vapor deposition. The doubly stacked layers of nc-Si with the thickness of about 5 nm were fabricated by the layer-by-layer deposition technique with silane and hydrogen mixture gas. Capacitance-Voltage (C-V) measurements were used to investigate electron tunnel and storage characteristic. Abnormal capacitance hysteresis phenomena are obtained. The C-V results show that the flatband voltage increases at first, then decreases and finally increases, exhibiting a clear deep at gate voltage of 9 V. The charge transfer effect model was put forward to explain the electron storage and discharging mechanism of the stacked nc-Si based memory structure. The decreasing of flatband voltage at moderate programming bias is attributed to the transfer of electrons from the lower nc-Si layer to the upper nc-Si layer.
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- 2012
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39. Influence of Radio Frequency Power on the Structural Properties of nc-Si Films Fabricated by VHF-PECVD
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Xiang Wang, Yan Qing Guo, Jie Song, Rui Huang, and Chao Song
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Materials science ,business.industry ,Mechanical Engineering ,RF power amplifier ,Nanocrystalline silicon ,Radio frequency power transmission ,symbols.namesake ,Crystallinity ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,symbols ,Electronic engineering ,Optoelectronics ,General Materials Science ,NC-SI ,Radio frequency ,business ,Raman spectroscopy - Abstract
In recent years, hydrogenated nanocrystalline silicon (nc-Si:H) film has received much attention due to its potential application in various optoelectronic devices. In the present work, nanocrystalline silicon (nc-Si) films were fabricated from SiH4 diluted with H2 in very high frequency (40.68 MHz) plasma enhanced chemical vapor deposition system. The influence of radio frequency (rf) power on the structural properties of nanocrystalline silicon films has been studied. Raman spectra show that the crystallinity of the nc-Si films can be increased by promoting the rf power. But over high rf power leads to the structural deterioration of nc-Si:H film. AFM images manifest that, with the increase of deposition time, the grain size becomes larger accompanied by the decrease of the number density.
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- 2012
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40. Photoluminescence Properties of Silicon Nitride Prepared by VHF-PECVD
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Xiang Wang, Chao Song, Yan Qing Guo, and Jie Song
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Photoluminescence ,Materials science ,Silicon ,business.industry ,Mechanical Engineering ,Nanocrystalline silicon ,chemistry.chemical_element ,Infrared spectroscopy ,Silane ,chemistry.chemical_compound ,chemistry ,Silicon nitride ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,Optoelectronics ,General Materials Science ,Light emission ,business - Abstract
Since the visible photoluminescence (PL) in porous Si was observed by Canham, much attention has been paid to the light emission from silicon-based materials. In this work, luminescent amorphous silicon nitride films were prepared by very-high-frequency plasma enhanced chemical vapor deposition technique using ammonia, silane and hydrogen as source gases at a low temperature of 50 °C. It is found that the films exhibit strong visible light emissions with ranging from green to red region. Photoluminescence spectra show that the emission peaks as well as intensity strongly depends on the flow rates of ammonia. Combining with the analyses of Fourier transform infrared absorption spectra and the transmission spectra, it is suggested that the light emissions are originated from the radiative recombination in the band-tail states of amorphous silicon nitride.
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- 2012
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41. Preparation of Nano-ZnFe2O4 Doped TiO2 Photocatalytic Films on Porous Hayddites
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Yan Qing Guo, Qing Wen Sun, Shu Hua Dong, Ke Jing Xu, and Xi Kai Liu
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Materials science ,Mechanical Engineering ,Sintering ,law.invention ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Mechanics of Materials ,law ,Nano ,Methyl orange ,Photocatalysis ,Copolymer ,General Materials Science ,Particle size ,Composite material ,Crystallization ,Sol-gel - Abstract
Applied nano-ZnFe2O4/TiO2 photocatlytic films are prepared by template sol-gel method on porous haydites. The effects of ZnFe2O4-doping on TiO2 crystallization, sintering temperature, light absorption and photocatalysis are mainly studied, simultaneously, effect of template, amphiphilic block copolymer P(styrene-b-acrylic acid) (PS-b-PAA) on the phtocatalytic activity of ZnFe2O4/TiO2 films are also studied. The results show that right amount of ZnFe2O4-doping reduces TiO2 sintering temperature and particle size, and increases TiO2 absorbency in ultraviolet region, and a right amount of template (PS-b-PAA) forms orient arranged ZnFe2O4/TiO2 films with the high photocatalytic activity and decomposes fully methyl orange in water after light irradiating 2h.
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- 2012
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42. Preparation of Nano Rice-Husk Ash and Effect on the Water-Resistance of Magnesium Oxychloride Composites
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Jin Tao Xi, Ke Jing Xu, and Yan Qing Guo
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Diffraction ,Materials science ,Water resistance ,chemistry ,Flexural strength ,Magnesium ,Scanning electron microscope ,Nano ,General Engineering ,chemistry.chemical_element ,Composite material ,Softening ,Husk - Abstract
A new method to improve the water-resistance of magnesium oxychloride composites (MOCs), with the addition of nano rice-husk ash (RHA), was studied. The related properties of samples were characterized by scanning electron microscope (SEM) and Brunauer Emmett and Teller (BET). The phase composition of MOCs was determined by X-ray diffraction (XRD). The water-resistance of MOCs was estimated by calculating softening coefficients. The experiments show that the particles size of nano RHA prepared is about 50nm, and the SiO2content is 92.30 %; a suitable amount of nano RHA to MOCs obviously increases the water-resistance without reducing the bending strength of MOCs, and increases the softening coefficient from 0.29 to 0.78.
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- 2011
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43. Correlation of Structural and Optical Properties of nc-Ge/a-Si Multilayers Grown by Ion Beam Sputtering
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Yan Qing Guo, Jie Song, Xiang Wang, Rui Huang, and Chao Song
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Photoluminescence ,Materials science ,Ion beam sputtering ,Silicon ,chemistry ,Atomic force microscopy ,Volume fraction ,General Engineering ,Analytical chemistry ,Optical property ,chemistry.chemical_element ,Luminescence ,Intensity (heat transfer) - Abstract
The nc-Ge/a-Si multilayer structures were fabricated by ion beam sputtering technique on silicon substrates at temperature of 400 °C. Raman scattering spectroscopy, atomic force microscopy (AFM) and room temperature photoluminescence were used to characterize the structure and optical property of the samples. It was found that the nc-Ge/a-Si multilayer sample can be obtained when the Ge sublayer is 3 nm. The room temperature photoluminescence was observed and the luminescent peak is located at 685 nm. Compared with the a-Ge/a-Si film, the intensity of PL of the nc-Ge/a-Si multilayer film becomes stronger due to the higher volume fraction of crystallized component.
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- 2011
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44. Validation of the Autism Spectrum Screening Questionnaire, Mandarin Chinese Version (CH-ASSQ) in Beijing, China
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Joseph F. Cubells, Li Ching Lee, Catherine Rice, Yan Qing Guo, Yufeng Wang, and Yi-Lang Tang
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China ,Pediatrics ,medicine.medical_specialty ,Adolescent ,Psychometrics ,behavioral disciplines and activities ,Mandarin Chinese ,Beijing ,Surveys and Questionnaires ,mental disorders ,Developmental and Educational Psychology ,medicine ,Humans ,Attention deficit hyperactivity disorder ,Child ,Childhood schizophrenia ,Language ,Reproducibility of Results ,medicine.disease ,language.human_language ,Screening questionnaire ,ROC Curve ,Attention Deficit Disorder with Hyperactivity ,Child Development Disorders, Pervasive ,Schizophrenia ,Child, Preschool ,language ,Autism ,Psychology ,Schizophrenia, Childhood - Abstract
Background: This study screened children in Beijing, China, in order to establish the validity of a Mandarin Chinese translation of the ASSQ. Methods: We recruited children diagnosed with autism spectrum disorders (ASDs), attention deficit/hyperactivity disorder (ADHD), childhood-onset schizophrenia (COS) (DSM-IV diagnoses made independently by two senior psychiatrists) and unaffected children attending a public school in Beijing. Their parents were asked to complete the CH-ASSQ. Results: Data from the parents of 94 children with ASD (mean age: 81 ± 47 months), 45 with ADHD (106 ± 27 months), 26 with COS (166 ± 36 months), and 120 unaffected control (72 ± 16 months) were collected. The total scores of ASSQ in children with ASD, ADHD, COS, and unaffected controls were 25.3 ± 9.2, 10.4 ± 7.1, 12.2 ± 10.6, and 5.2 ± 6.6 respectively. Total ASSQ scores of children with ASD were significantly higher than in any other group (all p < .0001). ROC analysis of ASD versus unaffected control subjects showed the area under curve was 0.957, with a cutoff of 12 having the maximum sensitivity (0.957) and specificity (0.825). Conclusions: Our pilot data suggest that CH-ASSQ successfully differentiates clinically diagnosed ASD patients from unaffected controls, as well as from patients with ADHD and COS. The instrument might therefore be useful for screening for ASD in urban Mandarin Chinese-speaking populations.
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- 2011
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45. Microstructure and Electric Transport Characteristic of Microcrystalline Silicon Films Fabricated by Very High Frequency Plasma Enhanced Chemical Vapor Deposition
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Yi Xiong Zhang, Chao Song, Jie Song, Rui Huang, Yan Qing Guo, and Xiang Wang
- Subjects
Materials science ,Mechanical Engineering ,Analytical chemistry ,Nanocrystalline silicon ,Activation energy ,Condensed Matter Physics ,Microstructure ,symbols.namesake ,Mechanics of Materials ,Transmission electron microscopy ,Plasma-enhanced chemical vapor deposition ,symbols ,General Materials Science ,High-resolution transmission electron microscopy ,Silicon oxide ,Raman spectroscopy - Abstract
Microcrystalline silicon (μc-Si:H) film deposited on silicon oxide in a very high frequency plasma enhanced chemical vapor deposition with highly H2 dilution of SiH4 has been investigated by Raman spectroscopy and high resolution transmission electron microscopy. Raman spectroscopy results show that the crystalline volume fraction increases with increasing the hydrogen flow rate and for the hydrogen flow rate of 160 sccm, the crystalline volume fraction reaches to 67.5%. Nearly parallel columnar structures with complex microstructure are found from cross-sectional transmission electron microscopy images of the film. The temperature depend dark conductivity and activation energy are studied in order to investigate the electronic transport processes in the nc-Si films.
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- 2010
- Full Text
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46. Photoluminescence Characteristics of Silicon Oxynitride Films at Different Annealing Temperatures
- Author
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Jie Song, Chao Song, Rui Huang, Yi Xiong Zhang, Xiang Wang, and Yan Qing Guo
- Subjects
Maximum intensity ,Photoluminescence ,Silicon oxynitride ,Materials science ,Annealing (metallurgy) ,business.industry ,Mechanical Engineering ,Condensed Matter Physics ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,Optoelectronics ,General Materials Science ,business - Abstract
Silicon oxynitride films were deposited in very-high-frequency (40.68 MHz) plasma enhanced chemical vapor deposition (VHF-PECVD), and subsequently annealed between 400 and 1200°C in N2 ambient. The effect of annealing temperature on the PL characteristics of the samples was investigated. The experimental results reveal that a broad PL peak around 430 nm (2.88eV) appears in all of the samples. The maximum intensity of this broad PL peak was obtained in the sample annealed at 400°C. The PL characteristics of the annealed samples were discussed.
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- 2010
- Full Text
- View/download PDF
47. Nanocrystalline Silicon Films Grown at High Pressure in Very High Frequency Plasma Enhanced Chemical Vapor Deposition System
- Author
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Xiang Wang, Yan Qing Guo, Rui Huang, Yi Xiong Zhang, and Jie Song
- Subjects
Hydrogen flux ,Materials science ,Mechanical Engineering ,Nanocrystalline silicon ,Analytical chemistry ,Very high frequency ,Condensed Matter Physics ,Ion bombardment ,Grain size ,Crystallinity ,Mechanics of Materials ,Plasma-enhanced chemical vapor deposition ,High pressure ,General Materials Science - Abstract
Nanocrystalline silicon films have been fabricated from SiH4 diluted with H2 in very high frequency (40.68 MHz) plasma enhanced chemical vapor deposition system at low temperatures (250oC). The influence of pressure on the structural properties of nanocrystalline silicon films has been investigated. The experimental results reveal that a very high hydrogen dilution is needed to crystallize the film grown at high pressure. If the hydrogen dilution is not high enough, the film could also be crystallized through lowering the pressure. Furthermore, the crystallinity and grain size increase with decreasing the pressure. These results could be attributed to the increase of ion bombardment energy and the higher atomic hydrogen flux toward the growing film surface at lower pressures.
- Published
- 2010
- Full Text
- View/download PDF
48. Quantum state transfer via a hybrid solid–optomechanical interface
- Author
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Pei Pei, Yan-Qing Guo, He-Fei Huang, Xing-Yuan Zhang, and Jia-Feng Dai
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Physics ,Photon ,Gaussian ,Physics::Optics ,General Physics and Astronomy ,01 natural sciences ,010305 fluids & plasmas ,symbols.namesake ,Quantum state ,Quantum mechanics ,Qubit ,0103 physical sciences ,Node (physics) ,symbols ,Quantum information ,010306 general physics ,Quantum ,Quantum computer - Abstract
We propose a scheme to implement quantum state transfer between two distant quantum nodes via a hybrid solid–optomechanical interface. The quantum state is encoded on the native superconducting qubit, and transferred to the microwave photon, then the optical photon successively, which afterwards is transmitted to the remote node by cavity leaking, and finally the quantum state is transferred to the remote superconducting qubit. The high efficiency of the state transfer is achieved by controllable Gaussian pulses sequence and numerically demonstrated with theoretically feasible parameters. Our scheme has the potential to implement unified quantum computing–communication–computing, and high fidelity of the microwave–optics–microwave transfer process of the quantum state.
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- 2018
- Full Text
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49. Two-mode entanglement using a spin-1/2 approximation method in two-component condensates
- Author
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Jing Chen, Hai-Jing Cao, Yan-Qing Guo, and He-Shan Song
- Subjects
Condensed Matter::Quantum Gases ,Physics ,Component (thermodynamics) ,Quantum mechanics ,General Physics and Astronomy ,Particle ,Quantum Physics ,Quantum entanglement ,W state ,Squashed entanglement ,Multipartite entanglement ,Quantum tunnelling ,Spin-½ - Abstract
We propose a spin- 1 2 approximation method to study the quantum entanglement of two-component Bose–Einstein condensates trapped in double wells. This approximation is demonstrated to be valid under the stationary tunneling condition and for odd particle numbers of each component. The contours of entanglement with respect to tunneling rate and time are found to be hyperbolic-like. Strong and long time sustained entanglement can be achieved, with the maximal entanglement occurring at tunneling times t ≈ κ Ω 2 ( π 2 + k π ) .
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- 2007
- Full Text
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50. Micromonospora nickelidurans sp. nov., isolated from soil from a nickel-mining site
- Author
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Miao Chun Fan, Xiao Hui Di, Xing Zhang, Gehong Wei, Dan Hong Dong, Yan Qing Guo, and Yanbing Lin
- Subjects
DNA, Bacterial ,China ,Sequence analysis ,Molecular Sequence Data ,Biology ,Diaminopimelic Acid ,Microbiology ,Micromonospora ,Mining ,chemistry.chemical_compound ,Cell Wall ,Nickel ,RNA, Ribosomal, 16S ,Botany ,Ecology, Evolution, Behavior and Systematics ,Phospholipids ,Phylogeny ,Soil Microbiology ,Base Composition ,Strain (chemistry) ,Fatty Acids ,Nucleic Acid Hybridization ,Vitamin K 2 ,General Medicine ,Sequence Analysis, DNA ,Ribosomal RNA ,16S ribosomal RNA ,biology.organism_classification ,Bacterial Typing Techniques ,chemistry ,Diaminopimelic acid ,Micromonospora coxensis ,Soil microbiology - Abstract
An actinomycete, strain K55T, was isolated from a composite soil sample from a nickel mine, collected from Yueyang, Shaanxi Province, PR China. Strain K55T showed 16S rRNA gene sequence similarities of 98.73 %–98.51 % to species of the genus Micromonospora, including Micromonospora haikouensis 232617T, Micromonospora coxensis 2-30-b(28)T, Micromonospora wenchangensis 2602GPT1-05T, Micromonospora matsumotoense IMSNU 22003T, Micromonospora maoerensis NEAU-MES19T, and Micromonospora humi P0402T. This strain harboured meso-diaminopimelic acid, alanine and glycine as the major cell-wall amino acids, xylose and glucose as the characteristic whole-cell sugars, and iso-C15 : 0 (20.53 %),iso-C17 : 0 (12.74 %), iso-C16 : 0 (12.15 %), anteiso-C17 : 0 (7.97 %), C17 : 1ω8c (7.49 %) and C17 : 0 (6.63 %) as the dominant fatty acids. The major menaquinones were MK-10(H4) and MK-10(H6). The phospholipid profile comprised phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylinositol, phosphatidylglycerol and unknown phosphoglycolipids. The DNA G+C content was 71.4 mol%. A comprehensive analysis of several physiological and biochemical traits and DNA–DNA relatedness indicated that strain K55T was different from closely related species. These phenotypic, genotypic and chemotaxonomic data suggest that strain K55T represents a novel species of the genus Micromonospora, for which the name Micromonospora nickelidurans sp. nov., is proposed. The type strain is K55T ( = JCM 30559T = ACCC19713T).
- Published
- 2015
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