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Engineering Sciences 2009年第1期7卷 37-44页

作者： He Ping Guan yijun zhang Xiongwen zhang Qun Zhou Jianhua Jiangsu Provincial Sutong Bridge Construction Commanding Department Nanjing 2 1006 China

Sutong Bridge,as a world-record cable-stayed bridge with its main span exceeding 1 000 m constructed in Yangtze River estuary region in China,is located at a site with complicated hydrologic conditions and poor geotechnical conditions and therefore,scour protection will be a decisive factor for ensuring smooth and successful construction of this *** paper,starting from structural description of deep-water group pile foundation,analyzes impact to the bridge safety introduced by scour and its protection and further presents different solutions of scour protection for foundation structures of this bridge.

关键词： Sutong Bridge deep-water group piles scour protection design construction

上海地方党委加强党的执政能力建设改进党的领导方式的探索与实践

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毛泽东邓小平理论研究 2005年第2期 10-15页

作者：张忆军中共上海市委党校党史党建部

中国共产党行使执政党的责任需要通过党的严密的组织体系来运行。各级地方党委在地方工作中按照总揽全局、协调各方的原则,发挥领导核心作用,承载了党中央的统一部署在地方工作的贯彻。党的领导主要是路线、方针、政策和重大决策的领导... 详细信息

中国共产党行使执政党的责任需要通过党的严密的组织体系来运行。各级地方党委在地方工作中按照总揽全局、协调各方的原则,发挥领导核心作用,承载了党中央的统一部署在地方工作的贯彻。党的领导主要是路线、方针、政策和重大决策的领导。决策的科学化和民主化是提高党的决策水平,乃至提高党的领导水平和执政水平的基本途径。党的决策是实现党的领导的一个基本活动,因此实现决策的科学化和民主化是改善党的领导方式和执政方式的重要内容。上海市委主要通过规范地方党委的职责范围和议事规则,进一步完善集体领导和个人分工负责制,完善科学决策等方面的制度,建立和健全上海各级地方党委总揽全局的领导体制和机制。

关键词：地方党委党的领导方式总揽全局民主化党的领导水平和执政水平个人分工负责议事规则决策上海组织体系

Networked H∞ filtering for discrete-time nonlinear singular system with mixed random delays and packet dropouts

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Networked H∞ filtering for discrete-time nonlinear singular...

第36届中国控制会议

作者： Qiyi Xu yijun zhang Shunyuan Xiao School of Automation Nanjing University of Science and Technology

The H filtering design problem is studied for a class of networked discrete-time nonlinear singular *** mixed random delays and packet dropouts in the communication channels are *** mixed time-delays consists of the discrete and distributed *** the packet dropout phenomenon occurs in a random *** mutually independent Bernoulli distributed random variables are utilized to model the stochastic *** using the Lyapunov-Kravoskii stability approach,sufficient conditions are presented to guarantee the closed-loop filter error system is regular,causal and stable with a certain H performance *** the H filtering design method is *** illustrative example is provided to illustrate the effectiveness of the proposed filter design method.

关键词： Networked system filtering singular system mixed delays packet dropouts

Adaptive control of bilateral teleoperation system under denial of service attacks

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Adaptive control of bilateral teleoperation system under den...

第三十九届中国控制会议

作者： Zhenpeng Jiang yijun zhang Xinyu Cai School of Automation Nanjing University of Science and Technology

The adaptive control of bilateral teleoperation system under denial of service（DoS） attacks is studied in this *** model of bilateral teleoperation system under DoS attacks is presented. The adaptive controllers are designed to deal with the influence of data missing caused by packet dropouts and DoS attacks. Two Bernoulli distributed variables are introduced to describe the system dynamic for the case that both packet dropouts and DoS attacks are involved in the communication *** globally asymptotically stability criterion is proposed by using Lyapunov functional methods, which implies the dynamics of the Master and the Slave are globally asymptotically synchronized. A numerical example of two degree of freedom bilateral teleoperation system is provided to show the effectiveness of obtained results.

关键词： Bilateral Teleoperation Packet dropouts DoS attacks Adaptive control

Neural network based sampling control of networked bilateral teleoperation systems

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Neural network based sampling control of networked bilateral...

第40届中国控制会议

作者： Wei He yijun zhang Yifan Wang School of Automation Nanjing University of Science and Technology

In this paper, the neural network-based sampling control of networked bilateral teleoperation system is studied. The problems of transmission delay, external interference and packet loss in the system are emphatically considered. A Bernoulli distributed variable is introduced to describe the dynamic characteristics of packet loss in the transmission channel. Two zeroorder holders are used to synchronize the time of using sampled data. To deal with the influences of the unknown external disturbances, adaptive controllers based on the neural network are designed. By choosing appropriate Lyapunov functions, the asymptotic stability of the teleoperation system is proved. It means that the velocity error and position error of the networked bilateral teleoperation system can converge to zero asymptotically. Finally, a numerical example is given to illustrate the performance of the teleoperation system with the proposed controllers.

关键词： Bilateral teleoperation packet loss adaptive control neural network

Network-based synchronous control of memristive neural networks with denial of service attacks

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Network-based synchronous control of memristive neural netwo...

第三十九届中国控制会议

作者： Xinyu Cai yijun zhang Zhenpeng Jiang School of Automation Nanjing University of Science and Technology

This letter is concerned with the issue of global asymptotically synchronization of two neural networks with the denial of service attacks in the communication channels. The memristive neural networks which are with memory, adaptability and high parallel processing ability are considered. A master-slave framework with networks attacks are proposed. Compared with the prior literatures, the DoS attack, which can destroy the network communication, has been modeled by Bernoulli distributed variable. Some sufficient conditions are derived to ensure the synchronization of networks by using Lyapunov function ***, a numerical example is given to illustrate the effectiveness of obtained results.

关键词： Memristive Neural Networks Synchronization DoS attacks Network-based

State estimation for delayed positive neural networks under false data injection attack

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State estimation for delayed positive neural networks under ...

第40届中国控制会议

作者： Yifan Wang yijun zhang Wei He School of Automation Nanjing University of Science and Technology

This paper focuses on the state estimator for a class of delayed discrete-time positive neural *** utilization of network in control system for information mutual interaction brings great *** it will be surfer from the issue of information security,*** data injection attacks occurring in information transmission are taken into consideration in this *** model of the delayed positive neural network with this kind of attacks is *** linear Lyapunov function,sufficient conditions for globally asymptotic stability of positive neural networks are *** desired positive estimator is designed by putting forward to a linear programming ***,an example of application to water distribution network is given to demonstrate the effectiveness and applicability of the derived results.

关键词： Positive neural networks state estimation false data injection attack delay

Event-triggered network-based l1 finite-time control for positive systems

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Event-triggered network-based l1 finite-time control for pos...

第36届中国控制会议

作者： Shunyuan Xiao yijun zhang Qiyi Xu School of Automation Nanjing University of Science and Technology

This paper focuses on the l finite-time control design problem of a class of network-based positive *** the event-triggered mechanism of signal transmission and the network-induced delay are taken into *** the peculiarity of positive systems,the event-triggered condition is designed in a linear form to reduce the occupation of network channels,which will save the limited communication *** using the linear Lyapunov method,a sufficient condition that guarantees the positive system to be finite-time bounded with l-gain performance is *** on the derived criterion,a linear programming(LP) method to design the finite-time controller is *** illustrative example is given to demonstrate the effectiveness of the obtained results.

关键词： Positive systems finite-time control networked control systems event-triggering

Understanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing metropolitan region

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Science China Earth Sciences 2021年第1期64卷 10-26页

作者： Xiushu QIE Shanfeng YUAN Zhixiong CHEN Dongfeng WANG Dongxia LIU Mengyu SUN Zhuling SUN Abhay SRIVASTAVA Hongbo zhang Jingyu LU Hui XIAO Yongheng BI Liang FENG Ye TIAN Yan XU Rubin JIANG Mingyuan LIU Xian XIAO Shu DUAN Debin SU Chengyun SUN Wenjing XU yijun zhang Gaopeng LU Da-Lin zhang Yan YIN Ye YU Key Laboratory of Middle Atmosphere and Global Environment Observation(LAGEO) Institute of A tmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China College of Atmospheric Science Chengdu University of Information TechnologyChengdu 610225China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Earth and Planetary Science University of Chinese Academy of ScienceBeijing 100049China Meteorological Observation Centre Beijing Meteorological BureauBeijing 100081China Jiangxi Weather Modification Nanchang 330096China Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China Department of Atmospheric and Oceanic Science University of MarylandMaryland 20742USA

The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards(STORM973)project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan region(BMR)during the warm season from 2014 to *** aim of the project was to understand how dynamical,microphysical and electrical processes interact in severe thunderstorms in the BMR,and how to assimilate lightning data in numerical weather prediction models to improve severe thunderstorm *** platforms used in the field campaign included the Beijing Lightning Network(BLNET,consisting of 16 stations),2 X-band dual linear polarimetric Doppler radars,and 4 laser raindrop *** collaboration also made use of the China Meteorological Administration’s mesoscale meteorological observation network in the Beijing-Tianjin-Hebei *** diverse thunderstorm types were documented,it was found that squall lines and multicell storms were the two major categories of severe thunderstorms with frequent lightning activity and extreme rainfall or unexpected local short-duration heavy rainfall resulting in inundations in the central urban area,influenced by the terrain and environmental *** flash density maximums were found in eastern Changping District,central and eastern Shunyi District,and the central urban area of Beijing,suggesting that the urban heat island effect has a crucial role in the intensification of thunderstorms over *** addition,the flash rate associated with super thunderstorms can reach hundreds of flashes per minute in the central city *** super(5%of the total),strong(35%),and weak(60%)thunderstorms contributed about 37%,56%,and 7%to the total flashes in the BMR,*** to the close connection between lightning activity and the thermodynamic and microphysical characteristics of the thunderstorms,the lightning flash rate can be used as an indicator of severe weather events,such as hail

关键词： Lightning 3D location Dual linear polarimetric Doppler radar Severe thunderstorm Lightning data assimilation Hail Short-term heavy precipitation

求解TSP的Hopfield网络权值修正算法分析

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上海交通大学学报 1995年第5期29卷 144-147,164页

作者：张忆军叶中行上海交通大学应用数学系上海

针对Ｈｏｐｆｉｅｌｄ神经网络在求解巡回推销员问题（ＴＳＰ）时出现的无效解和局部极小值问题，本文结合网络动态分析，利用权矩阵特征值在网络内部动力特性与外在解表现形式之间的关联作用，通过各特征值间关系协调，对基于原模型的... 详细信息

针对Ｈｏｐｆｉｅｌｄ神经网络在求解巡回推销员问题（ＴＳＰ）时出现的无效解和局部极小值问题，本文结合网络动态分析，利用权矩阵特征值在网络内部动力特性与外在解表现形式之间的关联作用，通过各特征值间关系协调，对基于原模型的权值修正方案作进一步理论分析与改进，探讨网络收敛于全局有效解的途径，并在全国３１省、市、自治区ＴＳＰ模拟中收到较好效果．

关键词： Hopfield网络推销员问题 TSP 权值修正方案