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Parallel Vision ■ Image Synthesis/Augmentation

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 782-784页

作者： Wenwen Zhang Wenbo zheng Qiang Li Fei-Yue Wang the School of Computer Science Shaanxi Normal UniversityXi’an 710119China the School of Computer Science and Technology Wuhan 430070China the State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China

Dear Editor,Scene understanding is an essential task in computer *** ultimate objective of scene understanding is to instruct computers to understand and reason about the scenes as humans *** vision is a research fram... 详细信息

关键词： instru explanation computer

Insights from metagenomic,metatranscriptomic,and molecular ecological network analyses into the effects of chromium nanoparticles on activated sludge system

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Frontiers of Environmental Science & Engineering 2020年第4期14卷 53-63页

作者： Quan zheng Minglu Zhang Tingting Zhang Xinhui Li Minghan Zhu Xiaohui Wang Beijing Engineering Research Center of Environmental Material for Water Purification College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China

The objectives of this study were to investigate the influence of chromium nanoparticles(Cr NPs)on the nitrogen and phosphorus removal performance and the bacterial structures of an activated sludge(AS)***,we through molecular ecological networks(MENs)discussed the bacterial *** last we researched the change of the functional genes and their expression patterns related to nitrogen and phosphorus removaT in an AS *** results showed that long-term exposure to 1 mg/L Cr NPs significantly promoted the denitrifying process and phosphorus removal in the AS *** relative abundance of denitrifying and phosphorus removal microorganisms,such as Denitratisoma,Thauera,Dechloromonas,and Defluviicoccus,increased *** Accumulibacter,well-known as polyphosphate-accumulating organisms(PAOs),increased significantly;the relative abundance of Candidatus Competibacter,known as glycogen-accumulating organisms(GAOs),decreased ***,metagenomic and metatranscriptomic analysis revealed that most of the genera related to denitrifying and phosphorus removal had greatly increased,according to the quantities of denitrifying and phosphorus genes,and the corresponding transcription likewise greatly ***,MENs analysis showed that although the overall network became smaller and looser in the presence of Cr NPs,the microbial connections among members related to nitrogen and phosphorus removal were *** abundance increases of denitrifiers and PAOs,and their increased transcription of functional genes,together with the enhanced interactions may be associated with the promotion of the denitrifying process and phosphorus removal.

关键词： Chromium nanoparticles(Cr NPs) Metagenomic analysis Metatranscriptomic analysis Molecular ecological networks(MENs) Nitrogen and phosphorus removal

high-Level Security Dimension Evaluation of Blockchain BaaS System and Key Technology

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China Communications 2024年第6期21卷 176-191页

作者： Chen Wanfa zheng Qing’an Chen Shuzhen Fu hongyi Chen Liang Fujian Police College Fuzhou 350007China Computer Science and Information Security Management Department Fujian Police CollegeFuzhou 350007China Fujian Province Key Laboratory for Digital Network Crime Supervision and Prevention Fuzhou 350007China Beijing University of Posts and Telecommunications Beijing 100876China Fujian Provincial Prison Administration Fuzhou 350002China

In recent years,blockchain technology integration and application has gradually become an important driving force for new technological innovation and industrial *** blockchain technology and applications are developing rapidly,the emerging security risks and obstacles have gradually become *** can still find security issues in blockchain systems and conduct attacks,causing increasing losses from network attacks every *** response to the current demand for blockchain application security detection and assessment in all industries,and the insufficient coverage of existing detection technologies such as smart contract detectiontechnology,this paper proposes a blockchain core technology security assessment system model,and studies the relevant detection and assessment key technologies and systems.A security assessment scheme based on a smart contract and consensus mechanism detection scheme is *** the underlying blockchain architecture supports the traceability of detection results using super ***,the functionality and performance of the system were tested,and the test results show that the model and solutions proposed in this paper have good feasibility.

关键词： blockchain security consensus mechanis smart contract

Analysis on the crossing obstacle of wheel-track hybrid mobile robot

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high Technology Letters 2016年第1期22卷 10-15页

作者：帅立国 Fei Yanqiong zheng Liyuan Gong Pengwei henan Institute of Science and Technology Xinxiang 453003 P. R. China Research Institute of Robotics Shanghai Jiaotong University Shanghai 200240 P. R. China

A novel wheel-track hybrid mobile robot with many movement patterns is *** to different environments,it can switch between the pure wheel pattern and the pure track *** to a homogeneous coordinate transformation matrix,gravity stability and its obstacle performance are *** gravity equation and climbing obstacle conditions are *** results show that this hybrid mobile robot could fully possess the advantages of both the wheel and the track mechanisms and achieve a good obstacle climbing capability.

关键词： wheel-track hybrid robot moving mechanism obstacle performance

Alarmins from conjunctival fibroblasts up-regulate matrix metalloproteinases in corneal fibroblasts

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International Journal of Ophthalmology(English edition) 2020年第7期13卷 1031-1038页

作者： Lin Chen Ye Liu Xiao-Shuo zheng hui zheng Ping-Ping Liu Xiu-Xia Yang Yang Liu Department of Ophthalmology the Fifth Affiliated HospitalSun Yat-sen UniversityZhuhai519000Guangdong ProvinceChina Department of Pathology the Fifth Affiliated HospitalSun Yat-sen UniversityZhuhai 519000Guangdong ProvinceChina

AIM:To explore the effects of alarmins produced by necrotic human conjunctival fibroblasts on the release of matrix metalloproteinases(MMPs)by human corneal fibroblasts(hCFs).METhODS:A necrotic cell supernatant(NhCS)was prepared by subjecting human conjunctival fibroblasts to three cycles of freezing and *** amounts of interleukin(IL)-1βand tumor necrosis factor(TNF)-αin NhCS were determined by enzyme-linked immunosorbent *** exposed to NhCS or other agents in culture were assayed for the release of MMPs as well as for intracellular signaling by immunoblot *** abundance of MMP m RNAs in hCFs was examined by reverse transcription and real-time polymerase chain reaction ***:NhCS increased the release of MMP-1 and MMP-3 by hCFs as well as the amounts of the corresponding m RNAs in the *** also induced activation of mitogen-activated protein kinase(MAPK)signaling pathways mediated by extracellular signal-regulated kinase(ERK),p38,and c-Jun Nh2-terminal kinase(JNK)as well as elicited that of the nuclear factor(NF)-κB signaling pathway by promoting phosphorylation of the endogenous NF-κB inhibitor IκB-α.Inhibitors of MAPK and NF-κB signaling as well as IL-1 and TNF-αreceptor antagonists attenuated the NhCS-induced release of MMP-1 and MMP-3 by ***,IL-1βand TNF-αwere both detected in NhCS,and treatment of hCFs with these cytokines induced the release of MMP-1 and MMP-3 in a concentration-dependent ***:Alarmins,including IL-1βand TNF-α,produced by necrotic human conjunctival fibroblasts triggered MMP release in hCFs through activation of MAPK and NF-κB ***-1βand TNF-αare therefore potential therapeutic targets for the amelioration of corneal stromal degradation in severe ocular burns.

关键词： alarmin ocular burn matrix metalloproteinase corneal fibroblast conjunctival fibroblast inflammation

Effects of heat Treatment on the Transformation Temperature and the Microstructure of Ni-Ti-Nb Shape Memory Alloy

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Journal of Materials Science & Technology 1998年第1期14卷 37-40页

作者： zheng, YF Cai, W Wang, YQ Luo, YC Zhao, LC harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

The effects of heat treatment on the phase transformation temperature and the microstructure of Ni-Ti-Nb alloy have been investigated by means of R-T method, TEM and EPMA. With the increase of annealing temperature, cooling rate and ageing temperature, the M-s temperature increases. TEM observations show no new precipitated phase was found in the B2 parent phase after heat treatment, but EPMA shows the content of Ni (or Ni/Ti ratio) in the B2 matrix changed. The main reason for the change of transformation temperature lies in the change of the matrix composition (or Ni/Ti ratio) with the variation of heat treatment procedure.

关键词： Shape memory effect

high-speed Trajectory Tracking Based on Model Predictive Control for Omni-directional Mobile Robots

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High-speed Trajectory Tracking Based on Model Predictive Con...

On pinning reachability of probabilistic Boolean control networks

第25届中国控制与决策会议

作者： Zhiwen Zeng huimin Lu Zhiqiang zheng College of Mechanics and Automation National University of Defense Technology

ISBN: (纸本)9781467355339

In dynamic environments, mobile robots sometimes are required to perform accurate and stable tracking of high-speed trajectories, but rare researches are reported, which specifically deal with high-speed tracking problem. When tracking high-speed trajectories, mobile robots usually approach the top speed and acceleration limits, which indicates that the kinematic constraints can not be ignored. In order to cope with such situations, a novel trajectory tracking controller using model predictive control has been studied. Where it differs from other control strategies lies in that this control law is generated based on predicating the evolution state of mobile robots and it is able to handle hard constraints directly in the optimization process, so that mobile robots can track trajectories both quickly and safely. In order to cut down the computational cost for on-line applications, Laguerre polynomials are used in the design of model predictive control to reduce the number of parameters for optimization. The proposed algorithm is applied on a real soccer robot, and the experimental results show that the robot can track high-speed trajectories effectively with small tracking errors and tiny computation time.

关键词： Trajectory Tracking high-speed Model Predictive Control Laguerre Polynomials

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Science China(Information Sciences) 2020年第6期63卷 232-234页

作者： Yang LIU Jinde CAO Liqing WANG zheng-Guang WU College of Mathematics and Computer Science Zhejiang Normal University Jiangsu Provincial Key Laboratory of Networked Collective Intelligence Southeast University School of Mathematics Southeast University National Laboratory of Industrial Control Technology Zhejiang University

Dear editor,Boolean networks (BNs) were introduced by Kauffman [1] to model complex and nonlinear biological systems. They have become a powerful tool for describing, analyzing, and simulating gene regulatory networks [2]. Probabilistic Boolean networks (PBNs) were proposed by Shmulevich et al.[3] as an extension of BNs. A PBN is a family of BNs, where at each discrete time point, the gene state transitions with respect to the rule of

关键词： PBN On pinning reachability of probabilistic Boolean control networks

Representing Model Uncertainty by Multi-Stochastic Physics Approaches in the GRAPES Ensemble

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Advances in Atmospheric Sciences 2020年第4期37卷 328-346页

作者： Zhizhen XU Jing ChEN zheng JIN hongqi LI Fajing ChEN Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China Chinese Academy of Meteorological Sciences China Meteorological AdministrationBeijing 100081China Numerical Weather Prediction Center China Meteorological AdministrationBeijing 100081China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

To represent model uncertainties more comprehensively,a stochastically perturbed parameterization(SPP)scheme consisting of temporally and spatially varying perturbations of 18 parameters in the microphysics,convection,boundary layer,and surface layer parameterization schemes,as well as the stochastically perturbed parameterization tendencies(SPPT)scheme,and the stochastic kinetic energy backscatter(SKEB)scheme,is applied in the Global and Regional Assimilation and Prediction Enhanced System-Regional Ensemble Prediction System(GRAPES-REPS)to evaluate and compare the general performance of various combinations of multiple stochastic physics *** experiments are performed for a summer month(1-30 June 2015)over China and multiple verification metrics are *** results show that:(1)All stochastic experiments outperform the control(CTL)experiment,and all combinations of stochastic parameterization schemes perform better than the single SPP scheme,indicating that stochastic methods can effectively improve the forecast skill,and combinations of multiple stochastic parameterization schemes can better represent model uncertainties;(2)The combination of all three stochastic physics schemes(SPP,SPPT,and SKEB)outperforms any other combination of two schemes in precipitation forecasting and surface and upper-air verification to better represent the model uncertainties and improve the forecast skill;(3)Combining SKEB with SPP and/or SPPT results in a notable increase in the spread and reduction in outliers for the upper-air wind *** directly perturbs the wind field and therefore its addition will greatly impact the upper-air wind-speed fields,and it contributes most to the improvement in spread and outliers for wind;(4)The introduction of SPP has a positive added value,and does not lead to large changes in the evolution of the kinetic energy(KE)spectrum at any wavelength;(5)The introduction of SPPT and SKEB would cause a 5%-10%and 30%-80%change in the KE of mesosc

关键词： ensemble prediction model uncertainty stochastically perturbed parameterization multi-stochastic physics approaches