29 results on '"Hong-Tao Zhou"'
Search Results
2. Review on 3D Fabrication at Nanoscale
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Ke Wang, Qian Ma, Cai-Xin Qu, Hong-Tao Zhou, Miao Cao, and Shu-Dong Wang
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General Materials Science - Abstract
Among the different nanostructures that have been demonstrated as promising materials for various applications, three–dimensional (3D) nanostructures have attracted significant attention as building blocks for constructing high-performance nanodevices because of their unusual mechanical, electrical, thermal, optical, and magnetic properties arising from their novel size effects and abundant active catalytic/reactive sites due to the high specific surface area. Considerable research efforts have been devoted to designing, fabricating, and evaluating 3D nanostructures for applications, including structural composites, electronics, photonics, biomedical engineering, and energy. This review provides an overview of the nanofabrication strategies that have been developed to fabricate 3D functional architectures with exquisite control over their morphology at the nanoscale. The pros and cons of the typical synthetic methods and experimental protocols are reviewed and outlined. Future challenges of fabrication of 3D nanostructured materials are also discussed to further advance current nanoscience and nanotechnology.
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- 2022
3. Design of Acoustic/Elastic Phase Gradient Metasurfaces: Principles, Functional Elements, Tunability, and Coding
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A-Li Chen, Yue-Sheng Wang, Yan-Feng Wang, Hong-Tao Zhou, and Si-Min Yuan
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Mechanical Engineering - Abstract
Acoustic/elastic metasurfaces as a kind of two-dimensional metamaterials are of subwavelength thickness and show remarkable ability of acoustic/elastic wave manipulation. They have potential applications in various fields such as acoustic imaging, communications, cloaking, camouflage, vibration/noise control, energy harvesting, and nondestructive testing. In this review, we mainly summarize recent developments in acoustic/elastic phase gradient metasurfaces, including design principles, design of functional elements, wave field manipulation with applications, design of tunable metasurfaces, as well as the emerging digital coding metasurfaces. At last, we outline the future research directions in this field.
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- 2022
4. Extreme transmission of elastic metasurface for deep subwavelength focusing
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Mu Jiang, Hong-Tao Zhou, Xiao-Shuang Li, Wen-Xiao Fu, Yan-Feng Wang, and Yue-Sheng Wang
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Mechanical Engineering ,Computational Mechanics - Published
- 2022
5. Review on Fabrication and Application of Regenerated Bombyx Mori Silk Fibroin Materials
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Ke Wang, Qian Ma, Hong-Tao Zhou, Ju-Mei Zhao, Miao Cao, and Shu-Dong Wang
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General Materials Science - Abstract
Natural silk fiber derived from the Bombyx mori (B. mori) silkworm has long been used as a luxury raw material in textile industry because of its shimmering appearance and durability, and as surgical suture for its high strength and flexibility. Regenerated silk fibroin, as the main protein extracted from the cocoons of the B. mori silkworm, recently has gained considerable attention due to its outstanding properties, including facile processability, superior biocompatibility, controllable biodegradation, and versatile functionalization. Tremendous effort has been made to fabricate silk fibroin into various promising materials with controlled structural and functional characteristics for advanced utilities in a multitude of biomedical applications, flexible optics, electronics devices, and filtration systems. Herein, reverse engineered silk fibroin extraction methods are reviewed, recent advances in extraction techniques are discussed. Fabrication methods of silk fibroin materials in various formats are also addressed in detail; in particular, progress in new fabrication technologies is presented. Attractive applications of silk fibroin-based materials are then summarized and highlighted. The challenges faced by current approaches in production of silk fibroin-based materials and future directions acquired for pushing these favorable materials further toward above mentioned applications are further elaborated.
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- 2022
6. Broadband inverted T-shaped seismic metamaterial
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Badreddine Assouar, Yifan Zhu, Hong-Tao Zhou, Liyun Cao, Yue-Sheng Wang, Yi Zeng, Qiujiao Du, Yan-Feng Wang, Shu-Yan Zhang, Tianjin University (TJU), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Beijing Jiaotong University (BJTU), and China University of Geosciences [Wuhan] (CUG)
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Surface (mathematics) ,Materials science ,Seismic metamaterials ,Field (physics) ,Band gap ,Relative bandwidth ,Acoustics ,FOS: Physical sciences ,Physics::Optics ,Large-scale field experiments ,Applied Physics (physics.app-ph) ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Seismic wave ,General Materials Science ,First bandgap ,Materials of engineering and construction. Mechanics of materials ,ComputingMilieux_MISCELLANEOUS ,[PHYS]Physics [physics] ,Mechanical Engineering ,Attenuation ,Metamaterial ,Physics - Applied Physics ,Half-space ,Surface waves ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Mechanics of Materials ,Surface wave ,TA401-492 ,0210 nano-technology ,Inverted T-shaped - Abstract
Seismic metamaterials (SMs) are expected to assist or replace traditional isolation systems owing to their strong attenuation of seismic waves. In this paper, a one-dimensional inverted T-shaped SM (1D ITSM) with an ultra-wide first bandgap (FBG) is proposed. The complex band structures are calculated to analyze the wave characteristics of the surface waves in the SMs. We find that the FBG of the 1D ITSM is composed of two parts; part 1 with surface evanescent waves and part 2 with no surface modes. Similar results are found in the complex band structure of the FBG of the SM consisting of periodically arranged pillars and substrate. The propagation of seismic surface waves in the 1D ITSM is different in these two frequency ranges of the FBG. In part 1, the seismic surface waves are significantly attenuated in the 1D ITSM, while in part 2, the surface waves are converted into bulk waves. Finally, the ultra-wide FBG is verified by using a kind of the two-dimensional ITSM in large-scale field experiments., 30 pages,15 figures
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- 2021
7. Loosely coupled reflective impedance metasurfaces: Precise manipulation of waterborne sound by topology optimization
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Hong-Tao Zhou, Wen-Xiao Fu, Xiao-Shuang Li, Yan-Feng Wang, and Yue-Sheng Wang
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Control and Systems Engineering ,Mechanical Engineering ,Signal Processing ,Aerospace Engineering ,Computer Science Applications ,Civil and Structural Engineering - Published
- 2022
8. High-efficiency Ultrathin Nonlocal Waterborne Acoustic Metasurface
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Wen-Xiao Fu, Hong-Tao Zhou, Yan-Feng Wang, and Yue-Sheng Wang
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Diffraction ,Physics ,Work (thermodynamics) ,Anomalous reflection ,Acoustics ,Physics::Optics ,General Physics and Astronomy ,02 engineering and technology ,Acoustic wave ,021001 nanoscience & nanotechnology ,01 natural sciences ,Wavelength ,Modulation ,Energy flow ,0103 physical sciences ,010306 general physics ,0210 nano-technology - Abstract
High-performance and lightweight waterborne acoustic devices have provided important support for the development of ocean exploration, health monitoring, etc. In this work, we propose a high-efficiency ultrathin nonlocal waterborne acoustic metasurface. Due to strong nonlocal interaction between the waterborne unit cells induced by the fluid-solid interaction, a nonlocal design concept based on diffraction theory and the optimization approach is proposed to design waterborne acoustic metasurfaces, in contrast to the local design based on the generalized Snell's law. The theoretical efficiency limitation of the generalized Snell's law can be broken, and unitary efficiency could be obtained even for large-angle anomalous reflection. The high-efficiency modulation is achieved owing to the energy flow along the metasurface resulting from the nonlocal interaction. The thickness of the waterborne acoustic metasurface can be minimized to one tenth or even one sixtieth of the working wavelength. The nonlocal design with fluid-solid interaction paves the way for high-efficiency and deep-subwavelength waterborne acoustic wave manipulation.
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- 2021
9. Broadband acoustic carpet cloak with dynamic or static metasurface
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Yue-Sheng Wang, Hong-Tao Zhou, Wen-Xiao Fu, and Yan-Feng Wang
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Narrowband ,Dynamic modulation ,Computer science ,Acoustics ,Broadband ,Significant difference ,Phase response ,Cloak - Abstract
Acoustic metasurface carpet cloak has suffered from narrowband limitation due to highly frequency-dependent phase response. Here, we adopt two entirely different ways to broaden the working frequency range of the carpet cloak with dynamic or static metasurface structure. Numerical simulations and experimental measurements demonstrate that the designed dynamic or static metasurface carpet cloak can both exhibit a broadband stealth performance. The proposed design strategy is expected to break the narrowband limitation of metasurfaces, making a significant difference to the practical applications of the broadband acoustic devices.
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- 2021
10. Ultra-broadband passive acoustic metasurface for wide-angle carpet cloaking
- Author
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Yan-Feng Wang, Chuanzeng Zhang, Yue-Sheng Wang, Wen-Xiao Fu, Vincent Laude, Hong-Tao Zhou, Tianjin University (TJU), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Universität Siegen [Siegen], and Femto-st, MN2S
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Fabrication ,Materials science ,[SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,Cloaking ,02 engineering and technology ,[SPI.MAT] Engineering Sciences [physics]/Materials ,010402 general chemistry ,01 natural sciences ,[SPI.MAT]Engineering Sciences [physics]/Materials ,Carpet cloaking ,Relative bandwidth ,Optics ,Broadband ,lcsh:TA401-492 ,Inverse optimization design ,General Materials Science ,[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,Wide angle ,Wavefront ,[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph] ,[SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph] ,business.industry ,Mechanical Engineering ,Bandwidth (signal processing) ,Cloak ,021001 nanoscience & nanotechnology ,Acoustic metasurfaces ,0104 chemical sciences ,Wavelength ,Mechanics of Materials ,Ultra-broad bandwidth ,lcsh:Materials of engineering and construction. Mechanics of materials ,0210 nano-technology ,business - Abstract
International audience; Acoustic metasurfaces can reshape a reflected wavefront rather arbitrarily, despite being much thinner than the wavelength, thus allowing on-demand wavefront modulation in a variety of applications. Recent passive metasurfaces, however, have suffered from bandwidth limitations, thus restricting their range of operation. In this work, we propose the systematic design of ultra-broadband passive metasurfaces by combining the broadband local reflection rule with an optimization method. The validation of the technique is demonstrated by fabrication and measurement of an ultra-broadband carpet cloak. Numerical and experimental results show that the relative bandwidth of the optimized carpet cloak, thinner than one fifth of the maximum wavelength, can exceed 93.33%, a value that is much larger than that of previous passive metasurfaces. Furthermore, multi-frequency pulse incidence tests reveal the excellent time-domain broadband characteristics of the metasurface over a wide range of angles of incidence. The proposed strategy opens a new route for the design of advanced passive metasurfaces for ultra-broadband wave manipulation and thus promotes practical applications of broadband acoustical devices.
- Published
- 2021
11. [Application of surface electromyography in children with dysphagia]
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Jin-Hua, He, Juan, Zhang, Li-Ping, Yuan, Rong, Qin, Hua, Liu, Ya-Qin, Duan, Hong-Tao, Zhou, and Yu-Juan, Xiong
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Electromyography ,otorhinolaryngologic diseases ,论著·临床研究 ,Humans ,Child ,Deglutition Disorders ,Deglutition - Abstract
OBJECTIVE: To study the application value of surface electromyography in children with dysphagia. METHODS: A total of 20 children with dysphagia were enrolled as the observation group, and 20 healthy children, matched for sex and age, were enrolled as the control group. Surface electromyography was used to record the electromyography integral values of the submental and infrahyoid muscle groups in the resting state and the state after water swallowing. The two groups were compared in terms of the electromyography integral values of the submental and infrahyoid muscle groups in the resting state and the state after swallowing 5 mL water. The observation group was observed in terms of the changes in the electromyography integral values of the submental and infrahyoid muscle groups after 1 month of rehabilitation treatment. A Spearman correlation analysis was used to evaluate the correlation of the degree of dysphagia with the electromyography integral values of the submental and infrahyoid muscle groups in the observation group. RESULTS: There was no significant difference between the two groups in the electromyography integral values of the submental and infrahyoid muscle groups in the resting state (P > 0.05), while after water swallowing, the observation group had significantly higher electromyography integral values than the control group (P < 0.05). The observation group had significant improvements in the clinical symptoms of dysphagia after treatment, with significant reductions in the electromyography integral values of the submental and infrahyoid muscle groups (P < 0.05). The severity of dysphagia was positively correlated with the electromyography integral values of the submental and infrahyoid muscle groups (P < 0.01). CONCLUSIONS: Surface electromyography is useful in the diagnosis and therapeutic effect evaluation for dysphagia in children.
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- 2019
12. Modulation of acoustic self-accelerating beams with tunable curved metasurfaces
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Hong-Tao Zhou, Yan-Feng Wang, Xiao-Shuang Li, and Yue-Sheng Wang
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010302 applied physics ,Physics ,Surface (mathematics) ,Physics and Astronomy (miscellaneous) ,business.industry ,Phase (waves) ,Physics::Optics ,Metamaterial ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Generator (circuit theory) ,Optics ,Modulation ,0103 physical sciences ,Physics::Accelerator Physics ,Caustic (optics) ,Spiral (railway) ,0210 nano-technology ,Focus (optics) ,business - Abstract
Self-accelerating beams have applications in optic and acoustic fields due to their peculiar properties. As a promising artificial two-dimensional metamaterial, a metasurface can be used as the generator of self-accelerating beams. However, restricted by the generalized Snell's law, most research hotspots focus on flat metasurfaces. In this Letter, the generalized Snell's law on an arbitrary curved reflective surface is discussed. Then, the phase profile for the self-accelerating beams generated from the curved reflective surface is derived based on the caustic theory. The metasurface consisting of the tunable spiral path units is constructed, and numerical and experimental validations are performed. The methodology developed in the present letter extends the applications of the self-accelerating beams.
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- 2021
13. Tunable arc-shaped acoustic metasurface carpet cloak
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Yan-Feng Wang, Yue-Sheng Wang, Xiao-Shuang Li, Shi-Wang Fan, Wen-Xiao Fu, and Hong-Tao Zhou
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010302 applied physics ,Physics ,Channel (digital image) ,Acoustics ,Cloak ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Mechanics of Materials ,0103 physical sciences ,Signal Processing ,General Materials Science ,Electrical and Electronic Engineering ,0210 nano-technology ,Civil and Structural Engineering - Abstract
In this paper, a tunable arc-shaped acoustic metasurface (AAM) carpet cloak has been proposed and systematically investigated. The AAM carpet cloak consists of covers, rotors, bolts and nuts. The rotors can be rotated continuously within the covers to form a reconfigurable hook channel mechanism. By setting various rotational angles, we construct two-dimensional (2D) tunable AAM carpet cloaks to achieve excellent stealth performances under different operating conditions. Numerical simulations and experimental results for the 2D carpet cloaks show good agreements. Furthermore, simulated results for three-dimensional (3D) carpet cloaks have demonstrated that tapered objects are successfully escaping from being detected. The tunable hook channel mechanism can be flexibly applied to arbitrarily curved metasurface carpet cloaks, making them closer to practical invisibility acoustic devices.
- Published
- 2020
14. The absence of exanthema is related with death and illness severity in acute enterovirus infection
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Yong-Hui Guo, Hong-Tao Zhou, Nan Yu, Bin Wang, Lei Zeng, Xiao-Yan Che, Pei Tang, Shao-Hua Tao, Man-Jun Chen, Xixia Ding, Kun Wen, and Yuxian Pan
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Male ,Microbiology (medical) ,China ,medicine.medical_specialty ,Enterovirus Infections ,CNS Involvement ,medicine.disease_cause ,Severity ,lcsh:Infectious and parasitic diseases ,Internal medicine ,medicine ,Humans ,Illness severity ,lcsh:RC109-216 ,Pathogen ,Illness ,Retrospective Studies ,Enterovirus ,business.industry ,Infant ,General Medicine ,Exanthema ,Death ,Infectious Diseases ,Child, Preschool ,Acute Disease ,Immunology ,Female ,medicine.symptom ,business ,Altered level of consciousness - Abstract
Summary Objective To clarify whether exanthema is related to illness severity in acute enterovirus infection in children. Methods The data of pediatric inpatients at Zhujiang Hospital during 2009–2012 with an acute enterovirus infection were reviewed retrospectively. Enterovirus infection was determined by real-time reverse transcription PCR. Clinical data were summarized and compared between cases with and without exanthema. Results A total of 780 pediatric inpatients with an acute enterovirus infection were included in this study, of whom 83 (10.6%) presented no exanthema. The percentage of deaths in the group of patients without exanthema was significantly higher than that in the group with exanthema (7.2% vs. 1.1%; p = 0.002). Central nervous system involvement (41.0% vs. 30.0%; p = 0.041), severe central nervous system (CNS) involvement (21.7% vs. 11.0%; p = 0.005), severe CNS involvement with cardiopulmonary failure (9.6% vs. 2.3%; p = 0.002), an altered level of consciousness (15.7% vs. 7.6%; p = 0.013), and convulsions (14.4% vs. 6.3%; p = 0.007) occurred significantly more frequently in the group without exanthema. Conclusions A considerable proportion of children with an acute enterovirus infection in Guangdong Province, China during 2009–2012 presented no exanthema, and the absence of exanthema was found to be related to death and illness severity for these acute enterovirus infections. Clinicians in China should consider enterovirus as the possible pathogen when treating children with an acute pathogen infection without exanthema.
- Published
- 2014
15. Influences of Different Aeration Patterns on the Composting of Green Waste and Rice Straw with Sewage Sludges
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Hong Tao Zhou, Xiao Jie Sun, Jia Jie Wang, and Jun Zhang
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Green waste ,Sewage sludge ,Waste management ,business.industry ,In-vessel composting ,Environmental science ,Sewage sludge treatment ,Mechanical biological treatment ,Sewage ,Sludge bulking ,General Medicine ,Aeration ,business - Abstract
A series of experiments were carried out aiming at resource utilization of fresh green waste and sewage sludge. The green waste, rice straw and sewage sludge were chosen as raw materials and packing materials in composting experiments to study the variation characteristics of composting in different aeration patterns. It was found that the effect of intermittent aeration pattern during composting was better than continuous aeration pattern according to the results of detection of composting temperature, oxygen, carbon dioxide.
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- 2013
16. Study of Exterior Window’s Energy-Saving Design for the Residential Buildings in Severe Cold Region
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Hong Tao Zhou
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Engineering ,business.industry ,Air temperature ,Thermal ,General Engineering ,Building energy ,Thermal comfort ,Window (computing) ,Structural engineering ,Energy consumption ,business ,Energy (signal processing) - Abstract
Measure the temperature of exterior window and surrounding walls’ inner surface, and measure interior air temperature to analyze the effect, which was brought to building energy consumption and interior thermal conditions by the exterior window of the building; studied several details of exterior window design, and proposes a method, which is separately controlling the heat-transfer coefficient according to different orientation, room’s positions and room’s functions while designing the exterior windows, in order to improve the interior thermal conditions and reduce energy consumption of the residential buildings.
- Published
- 2012
17. Changes in enterovirus serotype constituent ratios altered the clinical features of infected children in Guangdong Province, China, from 2010 to 2013
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Bin Wang, Man-Jun Chen, Shao-Hua Tao, Hong-Tao Zhou, Yuxian Pan, Nan Yu, Yong-Hui Guo, and Lin Xue
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0301 basic medicine ,Serotype ,China ,Herpangina ,medicine.medical_specialty ,Veterinary medicine ,Serogroup ,medicine.disease_cause ,03 medical and health sciences ,Medical microbiology ,stomatognathic system ,Enterovirus Infections ,medicine ,Humans ,Child ,Enterovirus ,Retrospective Studies ,Foot-and-mouth disease ,business.industry ,food and beverages ,virus diseases ,Clinical features ,Hand ,medicine.disease ,Virology ,Foot and mouth disease ,Enterovirus B, Human ,Hospitalization ,030104 developmental biology ,Infectious Diseases ,Child, Preschool ,Hand, Foot and Mouth Disease ,business ,Foot (unit) ,Research Article - Abstract
Background Enterovirus (EV)-related hand, foot, and mouth disease/herpangina (HFMD/HA) has been prevalent in Guangdong Province, China, since 2010. Methods Clinical data for EV-related HFMD/HA inpatients admitted to the Department of Paediatrics of Zhujiang Hospital from 2010 to 2013 were retrospectively reviewed. The corresponding EV serotypes were also determined by reverse transcription-polymerase chain reaction or BLAST analysis of the sequenced partial lengths of the viral protein1/5′-untranslated region. Results A total of 867 eligible inpatients admitted during 2010–2013 were included in the study. Of these, the serotype of the responsible EV was successfully identified in 824 cases. The incidence of enterovirus 71 (EV71) infection amongst pediatric HFMD/HA inpatients decreased dramatically from 55.5 % in 2010 to 8.1 % in 2013, with a similar decrease recorded for coxsackievirus A16 (CVA16). However, the incidence of non-EV71/CVA16 infection increased from 30.0 % in 2010 to 83.8 % in 2013. We noted that the types of infection caused by different EV serotypes varied: EV71 was responsible for 100 % of the paralysis cases (26/26), 84.6 % of the deaths (11/13), and 84.1 % of cases with severe central nervous system involvement (SCNSI) (74/88); echovirus contributed to 16.4 % of the deaths (2/13) and 4.4 % of the SCNSI cases; and coxsackievirus accounted for only 2.2 % of the SCNSI cases (2/90). The clinical features of HFMD/HA cases varied greatly during the time period examined, with drastic changes in the hospitalization rates (45.1, 63.7, 36.4, and 19.1 % for 2010, 2011, 2012, and 21013, respectively), mortality rates (2.3, 0.9, 2.5, and 0.0 %, respectively), paralysis (5.1, 1.2, 5.4, and 0.0 %, respectively), SCNSI (16.8, 7.1, 12.7, and 2.2 %, respectively), and acute respiratory infection (21.1, 22.0, 45.9, and 59.0 %, respectively). Conclusions The incidences of infection caused by different EV serotypes, along with the clinical features of HFMD/HA cases, changed drastically in Guangdong Province, China, from 2010 to 2013, with the biggest changes observed in 2013. The changed constituent ratios of the different EV serotypes might therefore be responsible for the differences in the observed clinical features of HFMD/HA during this period. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1690-0) contains supplementary material, which is available to authorized users.
- Published
- 2016
18. NLRC5 silencing ameliorates cardiac fibrosis by inhibiting the TGF‑β1/Smad3 signaling pathway
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Xuefang Yu, Guiming Zhou, and Hong‑Tao Zhou
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0301 basic medicine ,Cancer Research ,Cardiac fibrosis ,medicine.medical_treatment ,NLR Proteins ,SMAD ,030204 cardiovascular system & hematology ,Biology ,Biochemistry ,Rats, Sprague-Dawley ,Transforming Growth Factor beta1 ,03 medical and health sciences ,0302 clinical medicine ,Fibrosis ,Cell Movement ,Genetics ,medicine ,Gene silencing ,Animals ,Gene Silencing ,Smad3 Protein ,Phosphorylation ,Molecular Biology ,Cell Proliferation ,Growth factor ,Myocardium ,Intracellular Signaling Peptides and Proteins ,Fibroblasts ,medicine.disease ,Cell biology ,Up-Regulation ,030104 developmental biology ,Oncology ,Cancer research ,Molecular Medicine ,Female ,Mothers against decapentaplegic ,Hepatic fibrosis ,Myofibroblast ,Signal Transduction - Abstract
The proliferation of cardiac fibroblasts (CFs) and excessive deposition of extracellular matrix are the predominant pathological characteristics of cardiac fibrosis. As the largest member of the nucleotide‑binding domain and leucine‑rich repeat (NLR) family, NLRC5 has been shown to be pivotal in the development of hepatic fibrosis. However, whether NLRC5 is involved in the pathogenesis of cardiac fibrosis remains to be elucidated. The present study aimed to investigate the role of NLRC5 and its mechanisms in regulating cardiac fibrosis. CFs were stimulated with transforming growth factor (TGF)‑β1 for various times and the mRNA and protein expression of NLRC5 was assessed using reverse transcription‑quantitative polymerase chain reaction and western blot analysis, respectively. In addition, CFs were transfected with small interfering (si)RNA targeting NLRC5 or scramble siRNA for 24 h and then stimulated with TGF‑β1 for 24 h. Subsequently, cell proliferation was measured using an MTT assay, whereas cell migration was evaluated using a Transwell migration assay. The protein expression levels of α‑smooth muscle actin, collagen I, connective tissue growth factor, phosphorylated‑Smad3 and Smad3 were measured using western blot analysis. The results demonstrated that NLRC5 was upregulated in TGF‑β1‑induced CFs. The knockdown of NLRC5 significantly inhibited cell proliferation and migration, and suppressed myofibroblast differentiation and the expression of pro‑fibrotic molecules in TGF‑β1‑treated CFs. Furthermore, the knockdown of NLRC5 attenuated TGF‑β1‑induced phosphorylation of small mothers against decapentaplegic (Smad)3 in the CFs. The results of the present study indicated that NLRC5 acted as a key regulator of pathological cardiac fibrosis, and NLRC5 silencing ameliorated cardiac fibrosis by inhibiting the TGF‑β1/Smad3 signaling pathway. These results suggested that NLRC5 may be a novel target for attenuating cardiac fibrosis.
- Published
- 2016
19. The Calibration on Nonlinear Single Return Period Storm Intensity Model Parameters by the New Blending Accelerating Genetic Algorithm
- Author
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Jing Cheng Lu, Bozhi Ren, and Hong Tao Zhou
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Return period ,Mathematical optimization ,Nonlinear system ,Engineering ,Meta-optimization ,Calibration (statistics) ,business.industry ,Genetic algorithm ,Embedding ,Local search (optimization) ,General Medicine ,business ,Nonlinear programming - Abstract
Through improving the real-coded genetic algorithms and embedding the algorithm of accelerating the local search in the Powell direction and the operation of accelerating cycle, thereby it is constructed the New blend Accelerating Genetic Algorithm (hereinafter referred to as NBAGA). The applied examples of the calibration on nonlinear single return period storm intensity model parameters show that this method takes into account of the advantages of both the advantages of the improved real-coded genetic algorithms and the Powell Algorithm, therefore this method is an excellent nonlinear optimization method which can search the global optimal exact solutions quickly and in greater probability, as well as doing subtle search locally.
- Published
- 2012
20. Simulation on Three-Dimensional Flow Field of Oxidation Ditch
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Dun Qiu Wang, Wei Wei, Jian Wen Wei, and Hong Tao Zhou
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geography ,Engineering ,geography.geographical_feature_category ,Field (physics) ,Turbulence ,Fluent software ,business.industry ,Ditch ,General Engineering ,Three dimensional flow ,Flow field ,Impeller ,Oxidation ditch ,Geotechnical engineering ,business - Abstract
Using the Fluent software, the flow field of oxidation ditch was simulated by the three dimensional turbulence mathematical model. The velocities were analyzed and measured, and the simulation results showed acceptable prediction of the velocities in the oxidation ditch. The results also showed that velocity could reach more than 0.3m/s when 8 impellers worked, and MLSS in the whole ditch were almost uniform, therefore, the oxidation ditch runs well.
- Published
- 2012
21. Diosgenin inhibits angiotensin II-induced extracellular matrix remodeling in cardiac fibroblasts through regulating the TGF‑β1/Smad3 signaling pathway
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Gui‑Ming Zhou, Hong‑Tao Zhou, and Xue‑Fang Yu
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0301 basic medicine ,Cancer Research ,medicine.medical_specialty ,Cardiac fibrosis ,030204 cardiovascular system & hematology ,Biology ,Diosgenin ,Biochemistry ,Collagen Type I ,Extracellular matrix ,Transforming Growth Factor beta1 ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Fibrosis ,Internal medicine ,Genetics ,medicine ,Animals ,Smad3 Protein ,Phosphorylation ,Molecular Biology ,Cells, Cultured ,Cell Proliferation ,Angiotensin II ,Myocardium ,Cell Differentiation ,Fibroblasts ,medicine.disease ,Actins ,Cell biology ,Extracellular Matrix ,Fibronectins ,Rats ,Fibronectin ,030104 developmental biology ,Endocrinology ,Oncology ,chemistry ,biology.protein ,Molecular Medicine ,Signal transduction ,Myofibroblast ,Signal Transduction - Abstract
The proliferation of cardiac fibroblasts (CFs) and deposition of extracellular matrix (ECM) proteins are pivotal in the development of cardiac fibrosis. Recent studies have indicated that diosgenin may inhibit high glucose‑induced renal tubular fibrosis; however, to the best of our knowledge, no studies have focused on the effects of diosgenin on cardiac fibrosis. Therefore, the present study aimed to explore the effects of diosgenin on angiotensin II (Ang II)‑induced ECM remodeling, and its possible mechanism in rat CFs. CFs were pre‑incubated with diosgenin (1, 5 and 10 µM) for 24 h and were then stimulated with Ang II (100 nM) for 24 h. Cell proliferation was estimated using the MTS assay. The expression levels of α‑SMA, fibronectin, collagen I, TGF‑β1, in addition to phosphorylation of Smad3 were detected by western blotting. The results demonstrated that diosgenin inhibited Ang II‑induced CF proliferation and the differentiation of CFs to myofibroblasts. In addition, diosgenin was able to inhibit Ang II‑induced ECM expression in rat CFs. Furthermore, diosgenin inhibited Ang II‑induced expression of transforming growth factor‑β1 (TGF‑β1) and Smad3 phosphorylation in CFs. Taken together, these results suggest that diosgenin may inhibit Ang II‑induced ECM remodeling by suppressing the TGF‑β1/Smad3 signaling pathway in rat CFs. Therefore, diosgenin may possess therapeutic potential for the treatment of cardiac fibrosis.
- Published
- 2015
22. Calculation and Analysis of Artificial Boundary with Substructure Condensation Element
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Yuan Yi Zhao and Hong Tao Zhou
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Surface (mathematics) ,Physics ,FETI ,Condensation ,Boundary (topology) ,Substructure ,Near and far field ,Geometry ,General Medicine ,Mechanics ,Boundary knot method ,Finite element method - Abstract
Artificial boundary is an important part of finite element calculation model. Based on finite element method, this paper presents substructure condensation elements to simulate far field boundary. As most dynamic responses are focused on ground surface, substructure elements’ internal nodes are condensed and only keep the nodes on the ground surface to maintain the accuracy of scattering wave transmition. According to the example of verification, if the related parameters are chosen properly, the effect of substructure condensation boundary is guaranteed.
- Published
- 2011
23. Pore structure features of reservoirs at late high water-cut stage, Lamadian Oilfield, Daqing, China
- Author
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Jiang Zhang, Xian-gui Liu, Hong-tao Zhou, and Yu-bao Lin
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Energy Engineering and Power Technology ,chemistry.chemical_element ,Geology ,Water flooding ,Radius ,Geotechnical Engineering and Engineering Geology ,Fluid infiltration ,Mercury (element) ,Large pore ,Permeability (earth sciences) ,Infiltration (hydrology) ,stomatognathic system ,Water cut ,chemistry ,Geochemistry and Petrology ,lcsh:TP690-692.5 ,otorhinolaryngologic diseases ,Economic Geology ,Geotechnical engineering ,Petrology ,lcsh:Petroleum refining. Petroleum products - Abstract
Lamadian Oilfield has entered a high water-cut stage after long-term water flooding, and injected water circulates in high-permeability channels. Constant-rate and constant-pressure mercury injections were used to study the change in the physical properties of the reservoir during development by water flooding and that in the features of the pore structure of the reservoir before and after long-term water flush. The constant-rate mercury injection analysis shows that the throat radii of main infiltration paths are enlarged and the pore radius distribution remains constant after long-term water flooding, suggesting that the infiltrating features are controlled mainly by throats instead of pores. The constant-pressure mercury injection analysis shows that water flooding enlarges the pore-throat radius median and maximum radius, increases large throats, and the corresponding pore-throat distribution frequency and permeability. Both methods reveal that pore throats are enlarged after long-term water flooding and large pore throats are the main path of fluid infiltration. Key words: high water cut, long-term water flooding, pore structure feature, pore throat, constant-rate mercury injection analysis, constant-pressure mercury injection analysis
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- 2008
24. State-of-Practice Review of Deep Soil Mixing Techniques in China
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Hong-Tao Zhou, Fen Ye, and Jie Han
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Soil mixing ,Lateral earth pressure ,Mechanical Engineering ,Earth science ,Environmental science ,Excavation ,Geotechnical engineering ,Soil cement ,Stress distribution ,State of practice ,China ,Mixing (physics) ,Civil and Structural Engineering - Abstract
Deep soil mixing techniques have been widely adopted in China since the late 1970s and mainly used for ground improvement for structural support and earth-retaining structures for excavations. A comprehensive state-of-practice review on development, applications, soil-cement properties, mechanistic studies, design methods, and quality control of deep soil mixing techniques in China is presented. These research results will serve as a reference for advancing deep soil mixing techniques in the United States and other countries.
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- 2002
25. Nephrotic syndrome in hand, foot and mouth disease caused by coxsackievirus A16: a case report
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Hong-Tao Zhou, Bing Wang, and Xiao-Yan Che
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Male ,Microbiology (medical) ,medicine.medical_specialty ,viruses ,Nephrotic syndrome ,foot and mouth disease ,medicine.disease_cause ,Coxsackievirus a16 ,Hand-foot-and-mouth disease ,lcsh:Infectious and parasitic diseases ,medicine ,Humans ,lcsh:RC109-216 ,Foot-and-mouth disease ,business.industry ,General Medicine ,Hand ,medicine.disease ,Virology ,Dermatology ,Enterovirus A, Human ,Infectious Diseases ,Child, Preschool ,Enterovirus ,Coxsackievirus A16 ,Hand, Foot and Mouth Disease ,business - Abstract
Summary Some viruses, including certain members of the enterovirus genus, have been reported to cause nephrotic syndrome. However, no case of coxsackievirus A16 (CVA16)-related nephrotic syndrome has been reported so far. We describe a case of CVA16-related hand, foot and mouth disease presenting with nephrotic syndrome in a 3-year-old boy. This is the first report of CVA16-related nephrotic syndrome.
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- 2014
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26. Effects of 24-week treatment with acarbose on glucagon-like peptide 1 in newly diagnosed type 2 diabetic patients: a preliminary report
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Chunyan Shan, Ying Wang, Baocheng Chang, Huizhu Ren, Miaoyan Zheng, Yanguang Xu, Liming Chen, Juhong Yang, and Hong-tao Zhou
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Adult ,Male ,medicine.medical_specialty ,endocrine system ,Endocrinology, Diabetes and Metabolism ,Type 2 diabetes ,Nitric Oxide ,Carotid Intima-Media Thickness ,Nitric oxide ,Cohort Studies ,chemistry.chemical_compound ,Glucagon-Like Peptide 1 ,Internal medicine ,Diabetes mellitus ,medicine ,Humans ,Hypoglycemic Agents ,Glycoside Hydrolase Inhibitors ,Prospective Studies ,Prospective cohort study ,Acarbose ,Aged ,Original Investigation ,Nitric oxide type 2 diabetes ,biology ,business.industry ,Middle Aged ,medicine.disease ,Postprandial Period ,Glucagon-like peptide-1 ,Nitric oxide synthase ,Endocrinology ,Postprandial ,Carotid Arteries ,Treatment Outcome ,chemistry ,Diabetes Mellitus, Type 2 ,biology.protein ,Female ,Nitric Oxide Synthase ,business ,Cardiology and Cardiovascular Medicine ,medicine.drug - Abstract
Background Treatment with the alpha-glucosidase inhibitor (AGI) acarbose is associated with a significant reduction the risk of cardiovascular events. However, the underlying mechanisms of this effect are unclear. AGIs were recently suggested to participate in stimulating glucagon-like peptide 1 (GLP-1) secretion. We therefore examined the effects of a 24-week treatment of acarbose on endogenous GLP-1, nitric oxide (NO) levels, nitric oxide synthase (NOS) activity, and carotid intima-media thickness (CIMT) in newly diagnosed patients with type 2 diabetes (T2D). Methods Blood was drawn from 24 subjects (14 male, 10 female, age: 50.7 ± 7.36 years, BMI: 26.64 ± 3.38 kg/m2, GHbA1c: 7.00 ± 0.74%) with drug-naïve T2D at 0 and 120 min following a standard mixed meal for the measurements of active GLP-1, NO and NOS. The CIMT was measured prior to and following 24 weeks of acarbose monotherapy (mean dose: 268 mg daily). Results Following 24 weeks of acarbose treatment, both fasting and postprandial plasma GLP-1 levels were increased. In patients with increased postprandial GLP-1 levels, serum NO levels and NOS activities were also significantly increased and were positively related to GLP-1 levels. Although the CIMT was not significantly altered following treatment with acarbose, a decreased CIMT was negatively correlated with increased GLP-1 levels. Conclusions Twenty-four weeks of acarbose monotherapy in newly diagnosed patients with T2D is associated with significantly increased levels of both fasting and postprandial GLP-1 as well as significantly increased NO levels and NOS activity for those patients in whom postprandial GLP-1 levels were increased. Therefore, the benefits of acarbose on cardiovascular risk may be related to its stimulation of GLP-1 secretion.
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- 2013
27. Clinical pathway management in liver cirrhosis complicated with upper digestive tract hemorrhage
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Shan-Lin Li, Xue-Jin Liu, and Hong-Tao Zhou
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medicine.medical_specialty ,Cirrhosis ,Clinical pathway ,business.industry ,Internal medicine ,medicine ,business ,medicine.disease ,Gastroenterology ,Upper digestive tract - Published
- 2015
28. [A study on genetic variation between wild and cultivated populations of Paeonia lactiflora Pall]
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Hong-tao, Zhou, Shi-lin, Hu, Bao-lin, Guo, Xue-feng, Feng, Yu-ning, Yan, and Jia-shi, Li
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Plants, Medicinal ,Polymorphism, Genetic ,DNA, Plant ,Species Specificity ,Genetic Variation ,Paeonia ,Plant Roots ,Random Amplified Polymorphic DNA Technique - Abstract
To discuss the genetic differentiation between wild and cultivated populations of Paeonia lactiflora Pall., and to find the reason for forming the genuineness of Radix Paeoniae rubra (Chishao) and Radix Paeoniae alba (Baishao).Forty three representative samples of P. lactiflora from 11 localities were analyzed by RAPD method with 21 random primers. According to RAPD results, the genetic diversity and genetic differentiation of P. lactiflora were detected by the percentage of polymorphic sites (PPB), the coefficient of gene differentiation (GST) and analysis of molecular variance (AMOVA).(1) At species level, the PPB of P. lactiflora was 85.26%, the Nei's gene diversity (Ht) was 0.166. The PPB in wild population (WP) was 77.61%, which was more than that (54.96%) in cultivated population for medicine (MP), and that (61.76%) in cultivated population for ornament (OP). (2) AMOVA showed that 29.50% of the genetic diversity resulted from differentiation among populations. Pairwise Phist distance (0.3632) between WP and MP was furthest, while that (0.0973) between MP and OP was closest, indicating population differentiation was significant (P0.001). (3) In general, cluster analysis revealed that the samples of P. lactiflora were divided in wild and cultivated groups (except for 39). In WP, individuals of Duolun were separated from those of other localities. In MP, the clusters of samples corresponded well with their own habitats.In addition to environmental factor, genetic differentiation should be the main cause for the genuineness of "Chishao" and "Baishao". Because of over collection and worse habitat, P. lactiflora in Duolun, whose root is the famous Chinese Geo-herbal--"Duolun Chishao", is progresively rare. So, it should become the endangered germplasm resource to protect.
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- 2003
29. Enterovirus-related diarrhoea in Guangdong, China: clinical features and implications in hand, foot and mouth disease and herpangina
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Bin Wang, Yuxian Pan, Shao-Hua Tao, Hai-Su Yi, Hong-Tao Zhou, Yong-Hui Guo, Man-Jun Chen, Mei Yang, and Nan Yu
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0301 basic medicine ,Diarrhea ,Male ,Pediatrics ,medicine.medical_specialty ,Herpangina ,China ,Adolescent ,Genotype ,030106 microbiology ,medicine.disease_cause ,03 medical and health sciences ,stomatognathic system ,medicine ,Enterovirus Infections ,Prevalence ,Humans ,Child ,Enterovirus ,Foot-and-mouth disease ,business.industry ,Respiratory infection ,Clinical features ,medicine.disease ,Hand ,Virology ,Diarrhoea ,Foot and mouth disease ,030104 developmental biology ,Infectious Diseases ,Child, Preschool ,Female ,medicine.symptom ,business ,Complication ,Hand, Foot and Mouth Disease ,Meningitis ,Encephalitis ,Research Article - Abstract
Background A series of complications caused by enteroviruses, including meningitis, encephalitis, acute flaccid paralysis, acute cardiopulmonary failure, respiratory infection, and myocardial injury have been reported in hand, foot and mouth disease/herpangina (HFMD/HA). However, the complication of diarrhoea caused by enteroviruses has been neglected, and a summary of its clinical features and impact on HFMD/HA is unavailable. Methods We included inpatients with HFMD/HA admitted to the Paediatric Department of Zhujiang Hospital during 2009–2012. We summarised and compared clinical data for cases with and without diarrhoea, and determined enterovirus serotypes by reverse transcriptase polymerase chain reaction and genotyping based on a partial-length fragment of viral protein 1 or the 5’-untranslated region. Results There were 804 inpatients with HFMD/HA and 28 (3.5 %) presented with diarrhoea. Gastrointestinal symptoms were mild in most cases of diarrhoea (82.1 %), with high prevalence of no dehydration (82.1 %), short duration of diarrhoea (78.6 %) and watery stools (75.0 %). The prevalence of multi-organ dysfunction syndrome (10.7 vs 0.40 %) (p = 0.001), hepatic injury (14.3 vs 3.4 %) (p = 0.019), myocardial injury (21.4 vs 6.1 %) (p = 0.002) and convulsion (21.4 vs 7.2 %) (p = 0.016) was significantly higher in the diarrhoea than no diarrhoea group. There was no significant difference between the two groups regarding prevalence of death, altered consciousness, paralysis, central nervous system involvement, or acute respiratory infection. Conclusions Most patients with diarrhoea caused by enteroviruses circulating in Guangdong Province in 2009–2012 had mild or moderate gastrointestinal symptoms. Although enterovirus-related diarrhoea caused additional multi-organ dysfunction syndrome, hepatic injury and myocardial injury in children with HFMD/HA, timely intervention efficiently reduced disease severity and improved outcome.
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