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Current Status and Challenge of Pseudorabies Virus Infection in China

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Virologica Sinica 2021年第4期36卷 588-607页

作者： Lei Tan Jun Yao Yadi yang Wei Luo Xiaomin Yuan Lingchen yang Aibing Wang Laboratory of Animal Disease Prevention and Control and Animal Model Hunan Provincial Key Laboratory of Protein Engineering in Animal VaccinesCollege of Veterinary MedicineHunan Agricultural University(HUNAU)Changsha410128China PCB Biotechnology LLC RockvilleMD20852USA Yunnan Tropical and Subtropical Animal Virus Diseases Laboratory Yunnan Animal Science and Veterinary InstituteKunming650224China Department of Animal Science and Technology Huaihua Vocational and Technical CollegeHuaihua418000China

Pseudorabies(PR),also called Aujeszky's disease,is a highly infectious disease caused by pseudorabies virus(PRV).Without specific host tropism,PRV can infect a wide variety of mammals,including pig,sheep,cattle,etc.,thereby causing severe clinical symptoms and acute *** was firstly reported in China in 1950s,while outbreaks of emerging PRV variants have been documented in partial regions since 2011,leading to significant economic losses in swine *** scientists have been devoting to the design of diagnostic approaches and the development of vaccines during the past years,PR remains a vital infectious disease widely prevalent in Chinese pig ***,its potential threat to human health has also attracted the worldwide *** this review,we will provide a summary of current understanding of PRV in China,mainly focusing on PRV history,the existing diagnosis methods,PRV prevalence in pig population and other susceptible mammals,molecular characteristics,and the available vaccines against its ***,promising agents including traditional Chinese herbal medicines and novel inhibitors that may be employed to treat this viral infection,are also discussed.

关键词： Pseudorabies virus(PRV) Diagnosis methods Prevalence Multiple-species infection Prevention and control measures

Corrosion behavior of nickel-based 718 alloy determined by in situ electrochemical methods at different partial pressures of H2S in 25 wt% NaCl solution at 150℃

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Rare Metals 2019年第9期38卷 855-863页

作者： Yu-Bi Zhang Xiao-Liang yang An Tang School of Mechanical Engineering Henan University of EngineeringZhengzhou 451191China Chongqing Materials Research Institute Co. LtdChonging 400707China

The corrosion behavior of nickel-based 718 alloy at seven partial pressures of H2 S(PH2 S)was investigated using electrochemical impedance spectroscopy(EIS)and polarization methods in 25 wt% NaCl solution at150℃ for 168 *** tested results show that anodic reactions are controlled alternately by the diffusion mostly,then both charge transfer and diffusion and finally charge transfer mainly with the increment of PH2 *** corrosive products are composed of sulfides and oxides of Ni,Cr and Fe with double layers for PH2 S of 5.1 and 13.0 MPa and three layers for PH2 S of 10.4 MPa according to microstructures and compositions of corrosion products characterized by the scanning electron microscope(SEM)and electron probe microanalysis(EPMA)*** inner oxides layer plays a critical role in anti-corrosion in a wet H2 S environment at high temperature and pressure.

关键词： Nickel-based 718 alloy Corrosion electrochemistry Polarization Passive film

Grape leaf disease detection based on attention mechanisms

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 205-212页

作者： Wenjuan Guo Quan Feng Xiangzhou Li Sen yang Junqi yang College of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China School of Cyber Security Gansu University of Political Science and LawLanzhou 730070China

Prevention and control of grape diseases is the key measure to ensure grape *** order to improve the precision of grape leaf disease detection,in this study,Squeeze-and-Excitation Networks(SE),Efficient Channel Attention(ECA),and Convolutional Block Attention Module(CBAM)attention mechanisms were introduced into Faster Region-based Convolutional Neural Networks(R-CNN),YOLOx,and single shot multibox detector(SSD),to enhance important features and weaken unrelated features and ensure the real-time performance of the model in improving its detection *** study showed that Faster R-CNN,YOLOx,and SSD models based on different attention mechanisms effectively enhanced the detection precision and operation speed of the models by slightly enhancing *** models among the three types of models were selected for comparison,and results showed that Faster R-CNN+SE had lower detection precision,YOLOx+ECA required the least parameters with the highest detection precision,and SSD+SE showed optimal real-time performance with relatively high detection *** study solved the problem of difficulty in grape leaf disease detection and provided a reference for the analysis of grape diseases and symptoms in automated agricultural production.

关键词： disease detection Faster R-CNN YOLOx SSD attention mechanism

Efficient Chemical Prelithiation with Modificatory Li^(+) Solvation Structure Enabling Spatially Homogeneous SEI toward High Performance SiO_(x) Anode

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Chinese Journal of Chemistry 2024年第17期42卷 2056-2065页

作者： Ruoyang Wang Yuqing Wu Yifan Niu Qing yang Haoyu Li yang Song Benhe Zhong Liwen yang Ting Chen Zhenguo Wu Xiaodong Guo School of Chemical Engineering Sichuan UniversityChengduSichuan 610065China Chengdu No.7 High School ChengduSichuan 6100412China Institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz1D-76344 Eggenstein-LeopoldshafenGermany Institute for Advanced Study Chengdu UniversityChengduSichuan 610106China

Chemical prelithiation is widely proven to be an effective strategy to address the low initial coulombic efficiency(ICE)of promising SiO_(x) *** the reagent composition has been widely explored,the Li^(+) solvation structure,which practically plays the cornerstone role in the prelithiation ability,rate,uniformility,has rarely been explored.A novel environmentally-friendly reagent with weak solvent cyclopentyl methyl ether(CPME)is proposed that enables both improved ICE and spatial homogeneous solid electrolyte interphase(SEl).And the prelithiation behavior and mechanism were explored focused on the Li^(+) solvation *** theoretical investigation and spectroscopic results suggest that weak solvent feature of CPME reduces the solvent coordination number and decreases the Li^(+) desolvation energy.

关键词： Lithium-ion battery SiO_(x)anode Prelithiation Weak solvent Homogeneous SEI Energy conversion Desolvation energy

Comparison of different techniques for time-frequency analysis of internal combustion engine vibration signals

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第7期12卷 519-531页

作者： yang JIN Zhi-yong HAO Xu ZHENG Department of Energy Engineering Zhejiang University Hangzhou 310027 China Department of Automotive Engineering Hubei University of Automotive Technology Shiyan 442002 China

In this study,we report an analysis of cylinder head vibration signals at a steady engine speed using short-time Fourier transform(STFT).Three popular time-frequency analysis techniques,i.e.,STFT,analytic wavelet transform(AWT) and S transform(ST),have been *** and ST are often applied in engine signal *** particular,an AWT expression in terms of the quality factor Q and an analytical relationship between ST and AWT have been *** time-frequency resolution of a Gaussian function windowed STFT was studied via numerical *** on the simulation,the empirical limits for the lowest distinguishable frequency as well as the time and frequency resolutions were *** can provide insights for window width selection,spectrogram interpretation and artifact *** function windowed STFTs were applied to some cylinder head vibration *** spectrograms of the same signals from ST and AWT were also determined for *** results indicate that the uniform resolution feature of STFT is not necessarily a disadvantage for time-frequency analysis of vibration signals when the engine is in stationary state because it can more accurately localize the frequency components excited by transient excitations without much loss of time resolution.

关键词： Short-time Fourier transform(STFT) Gaussian window Time-frequency resolution limits Internal combustion(IC) engine Vibration signals Analytic wavelet transform(AWT) S transform(ST)

Piezoresistive behavior of elastomer composites with segregated network of carbon nanostructures and alumina

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Nano Materials Science 2023年第3期5卷 312-318页

作者： Chun-Yan Tang Lei Liu Kai Ke Bo Yin Ming-Bo yang Wei yang College of Polymer Science and Engineering Sichuan UniversityState Key Laboratory of Polymer Materials EngineeringChengdu610065SichuanChina

Electrically conductive elastomer composites(CECs)with segregated networks of conductive nanofillers show high potential in stretchable strain sensors due to balanced mechanical and electrical properties,yet the sensitivity at low strain is generally insufficient for practical ***,we report an easy and effective way to improve the resistive response to low strain for CECs with segregated network structure via adding stiff alumina into carbon nanostructures(CNS).The CEC containing 0.7 wt%CNS and 5 wt%Al_(2)O_(3) almost sustains the same elasticity(elongation at break of~900%)and conductivity(0.8 S/m)as the control,while the piezoresistive sensitivity is significantly *** polyurethane(TPU)composites with a segregated network of hybrid nanofillers(CNS and Al_(2)O_(3))show much higher strain sensitivity(Gauge factor,GF-566)at low strain(45%strain)due to a local stress concentration effect,this sensitivity is superior to that of TPU/CNS composites(GF-11).Such a local stress concentration effect depends on alumina content and its distribution at the TPU particle *** addition,CECs with hybrid fillers show better reproducibility in cyclic piezoresistive behavior testing than the *** work offers an easy method for fabricating CECs with a segregated filler network offering stretchable strain sensors with a high strain sensitivity.

关键词： Thermoplastic polyurethane Carbon nanostructures Alumina Conductive elastomer composites Stretchable strain sensor

Characteristics of Compositional Migration in Mylonites from the Ductile Shear Zones of the Southern Tancheng-Lujiang Fault Belt, Eastern Anhui Province

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Acta Geologica Sinica(English Edition) 1998年第1期72卷 37-50页

作者： yang Xiaoyong LUI Deliang yang Xueming WANG Kuiren DAI Jinxing Department of Earth and Space Sciences Advanced Centre for Earth Sciences and AstronomyUniversity of Science and Technology of Chinathe Third World Academy of SciencesHefeiAnhui 230026 Research Institute of Petroleum Exploration and Development China National Petroleum CorporationBeijing 100083

On the basis of field geology, three typical ductile shear zones in the southern part of the Tancheng-Lujiang fault belt have been chosen for a detailed study. Altogether ten samples of the tectonites have been collected for this study. The paper is focused on a comprehensive study of the tectonites in the medium-lower horizons of the ductile shear zones. The mineral compositions of the rocks are analyzed with EPMA and some typical whole-rock samples analyzed by chemical and ICP methods. Based on the comprehensive study of the characteristics of the deformation, the mineral assemblages and the changes of chemical composition of the bulk rocks, this paper presents a discussion on the relationship between the volume loss, the fluid flow and compositional changes during mylonitization of the ductile shear zones in this region. Our study shows that there are a large amount of fluids flowing through the shear zones during the process of mylonization, accompanied by the loss of rock volume and migration of elements and components. Modelling calculation results under different saturation conditions of fluids show that the maximum volume loss of the tectonites is about 60% relative to their protolith, while the fluid/rock ratio ranges from 10 to 103 in different ductile shear zones.

关键词： mylonite ductile shear zones volume loss fluid-rock interaction compositional migration Tancheng-Lujiang fault belt

Verification of a Modified Nonhydrostatic Global Spectral Dynamical Core Based on the Dry-Mass Vertical Coordinate: Three-Dimensional Idealized Test Cases

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Journal of Meteorological Research 2023年第3期37卷 286-306页

作者： Jun PENG Jianping WU Xiangrong yang Jun ZHAO Weimin ZHANG Jinhui yang Fukang YIN College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073

The newly developed nonhydrostatic(NH)global spectral dynamical core is evaluated by using three-dimensional(3D)benchmark tests with/without *** new dynamical core differs from the original Aladin-NH like one in the combined use of a dry-mass vertical coordinate and a new temperature variable,and thus,it inherently conserves the dry air mass and includes the mass sink effect associated with precipitation *** 3D dry benchmark tests are first conducted,including steady state,dry baroclinic waves,mountain waves in non-sheared and sheared background flows,and a dry Held–Suarez *** results from these test cases demonstrate that the present dynamical core is accurate and robust in applications on the sphere,especially for addressing the nonhydrostatic ***,three additional moist test cases are conducted to further explore the improvement of the new dynamical ***,in contrast to the original Aladin-NH like one,the new dynamical core prefers to obtain simulated tropical cyclone with lower pressure,stronger wind speeds,and faster northward movement,which is much closer to the results from the Model for Prediction Across Scales(MPAS),and it also enhances the updrafts and provides enhanced precipitation rate in the tropics,which partially compensates the inefficient vertical transport due to the absence of the deep convection parameterization in the moist Held–Suarez test,thus demonstrating its potential value for full-physics global NH numerical weather prediction application.

关键词： nonhydrostatic global spectral dynamical core idealized tests mountain waves tropical cyclone

Design and Experiments of Ultrasound Image-Guided Multi-DOF Robot System for Brachytherapy

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Transactions of Tianjin University 2017年第5期23卷 479-487页

作者： Shan Jiang Yunpeng yang Zhiyong yang Zhen Zhang Sheng Liu School of Mechanical Engineering Tianjin UniversityTianjin 300350 China

To implant radioactive seeds through a needle precisely and safely, a novel multi-DOF surgical robotic system is presented in this paper for percutaneous prostate intervention through the patient’s perineum under real-time ultrasound image guidance. The proposed robot, which is designed with 9-DOF, consists of a 3-DOF automatic location platform for position adjustment, 2-DOF for automatic ultrasonic probe adjustment mounted with electromagnetic trackers, and 4-DOF for manually adjusting the guided template. Meanwhile, a new registration method based on the quaternion algorithm and least square method is developed, and the needle insertion is performed under the real-time guidance of a navigation system. Furthermore, the robot system has undergone some preliminary experiments with a laser tracker to evaluate the repeatability and accuracy of the robot system. The location error of the puncture needle tip can be controlled under 0.7 mm in air for the whole robotic system. The acquired results endorse the precision of the robot system for prostate seed implantation brachytherapy. © 2017, Tianjin University and Springer-Verlag GmbH Germany.

关键词： Implants (surgical) Least squares approximations Machine design Nanocomposites Navigation systems Needles Oncology Patient treatment Radiotherapy Robotics Ultrasonics Urology