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controlling Contagion Processes in Activity Driven Networks

Physical Review Letters 2014年第11期112卷 118702-118702页

作者： Suyu Liu Nicola Perra Márton Karsai Alessandro Vespignani State Key Laboratory of Industrial Control Technology Institute of Cyber-systems and Control Zhejiang University Hangzhou 310027 China Laboratory for the Modeling of Biological and Socio-technical Systems Northeastern University Boston Massachusetts 02115 USA Institute for Scientific Interchange Foundation Turin 10133 Italy

The vast majority of strategies aimed at controlling contagion processes on networks consider the connectivity pattern of the system either quenched or annealed. However, in the real world, many networks are highly dynamical and evolve, in time, concurrently with the contagion process. Here, we derive an analytical framework for the study of control strategies specifically devised for a class of time-varying networks, namely activity-driven networks. We develop a block variable mean-field approach that allows the derivation of the equations describing the coevolution of the contagion process and the network dynamic. We derive the critical immunization threshold and assess the effectiveness of three different control strategies. Finally, we validate the theoretical picture by simulating numerically the spreading process and control strategies in both synthetic networks and a large-scale, real-world, mobile telephone call data set.

关键词： IMMUNIZATION MEAN field theory TELEPHONE calls COMPUTER simulation EQUATIONS

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Single Cell Protein Detection by Digital Quantification of Amplified Single Molecules

Single Cell Protein Detection by Digital Quantification of A...

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第九届全国微全分析系统学术会议、第四届全国微纳尺度生物分离分析学术会议、2014国际微流控芯片与微纳尺度生物分离分析学术会议

作者： Qiangyuan Zhu Lin Qiu Yanan Xu Congcong Ma Wei Jin Qinhan Jin Ying Mu Research Center for Analytical Instrumentation Institute of Cyber-Systems and ControlState Key Laboratory of Industrial Control TechnologyZhejiang UniversityHangzhou 310058China

Very low abundance protein molecular detection,especially for early diagnosis of cancer markers detection is extremely difficult,with the development of single-cell omics in the recent years,there is no a better approach for precise quantification of protein molecules within a single *** intend to develop an novel digital proximity ligation assay chip for single protein molecule detection,which integrates the proximity ligation assay for protein detection with the self-priming compartmentalization digital PCR chip to develop an absolute quantitative method for single protein molecule counting-digital proximity ligation *** method can provide a new tool for single molecule proteins detection of low abundance proteins and absolute quantification of single cell protein molecule *** the advantages of high detection sensitivity,strong specificity,low sample consumption,simple operation,testing equipment common and so on,the digital PLA method not only can detect trace amounts of tumor protein markers in the serum with tiny nonspecific detection,and the number of protein molecules in a single cell by single molecule *** to the existing single molecule enzyme-linked immunoassays detection technology,it is more simple,less sample consumption,better sensitivity and *** the early diagnosis of cancer,the occurrence and development of tumor,drug screening,single cell analysis and identification of cancer stem cells,digital PLA will have important application value and practical value.

关键词： single protein molecule digital PCR single cell Proximity ligation Assay

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Compressive sensing based FPGA+Zig Bee implementation for energy-efficient wireless transmission of acoustic signal 21

Compressive sensing based FPGA+Zig Bee implementation for en...

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21st International Congress on Sound and Vibration 2014, ICSV 2014

作者： Du, Tianxu Wu, Liantao Bao, Ming Wang, Zhi State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou310027 China Institute of Acoustics Chinese Academy of Sciences Beijing100190 China

ISBN: (纸本)9781634392389

Wireless links provides great convenience in node deployment. But its limited bandwidth brings challenge for large volume transmission tasks. Compressive sensing (CS) is a promising solution for this problem. In this paper, we present a CS based wireless sensor network framework for acoustic signal acquisition, which can significantly reduce acoustic signal data volume without affecting its quality. The framework consists of Transmitter, Receiver and Terminal, all combined to complete tasks including signal receiving, compressive sampling, wireless sending and receiving, and signal recovery. A experimental testbed is implemented using FPGA and Zig Bee chips. The results show that these signals can be well recovered with negligible norm error. It also indicates that using this framework can significantly reduce the total volume of signal acquisition. Copyright © (2014) by the International institute of Acoustics & Vibration All rights reserved.

关键词： Compressed sensing

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Delay-dependent finite-time H∞ filtering for networked control systems:A switched system approach

Delay-dependent finite-time H∞ filtering for networked cont...

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第三十三届中国控制会议

作者： Yuan-Qing Wu Hongye Su Mathiyalagan Kalidass ZhengGuang Wu Weihua Xu National Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang UniversityYuquan Campus

ISBN: (纸本)9781479947249

This paper investigates the problem of finite-time H∞filtering for networked control systems(NCS)with time delay and packet loss ***,a switching model is utilized to describe these network-induced imperfections,which can be denoted as three switching ***,in the case of packet dropout,the first-order holder(FOH)is constructed to make the controller use the previous state.A full-order filter is designed to estimate the output signal of the *** on the employed appropriate Lyapunov-Krasovskii functional and auxiliary slack matrices,sufficient conditions are derived in terms of linear matrix inequalities(LMIs),which can ensure the resulting filtering error dynamical system is bounded and satisfies a prescribed H∞disturbance attenuation in a fixed finite-time ***,a numerical example is exploited to demonstrate the applicability and validity of the proposed filter design method.

关键词： NCS,finite-time H∞filtering,switching method

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New trends in nonlinear control systems and applications

Abstract and Applied Analysis

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Abstract and Applied Analysis 2015年第1期2015卷

作者： Liu, Zhitao Huang, Deqing Xing, Yifan Zhang, Chuanke Wu, Zhengguang Ji, Xiaofu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China Department of Aeronautics Imperial College London London SW7 2AZ United Kingdom Frick Chemistry Laboratory Princeton University Princeton 08544 NJ United States Department of Electrical Engineering and Electronics University of Liverpool Liverpool L69 3GJ United Kingdom Department of Electrical Engineering School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 China

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A Partial-state Observer for a Class of MIMO Nonlinear systems

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IFAC Proceedings Volumes 2014年第3期47卷 3676-3681页

作者： Lei Wang Alberto Isidori Hongye Su Weihua Xu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University 310027 Hangzhou P.R.China Department of Computer Control and Management Engineering University of Rome “La Sapienza” Rome Italy

In this paper, we consider input-affine invertible MIMO nonlinear systems which can be transformed into a special normal form by means of the structure algorithm. The normal form highlights a partial state, a subset of state variables, which plays in this setting a role similar to that of the outputs and its derivatives in a SISO system. It is shown that, if a system in this class can be asymptotically stabilized by means of a static feedback from that partial state, then semiglobal stabilization can be achieved via dynamic feedback driven by the output of the system. The dynamic feedback in question is based a (non–trivial) extension to MIMO systems of the standard high–gain observer.

关键词： MIMO nonlinear systems structure algorithm normal forms minimum-phase systems nonlinear observers

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Modeling and H∞ composite control of the coupled hysteretic dynamics in piezoelectric micro-displacement systems 11

Modeling and H∞ composite control of the coupled hysteretic...

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11th International Conference on Informatics in control, Automation and Robotics, ICINCO 2014

作者： Tang, Liang Liu, Lei Guan, Xin Beijing Institute of Control Engineering National Laboratory of Space Intelligent Control Beijing100080 China State Key Laboratory of Structural Analysis for Industrial Equipment School of Aeronautics and Astronautics Dalian University of Technology Dalian116024 China

ISBN: (纸本)9789897580390

This paper investigates the modeling and H∞ composite control of the coupled hysteretic dynamics in a piezoelectric micro-displacement system (PMS). First, the coupled multi-field hysteretic dynamics with physical meanings is presented for PMS. Next, the composite control analysis of the hysteretic dynamics is proposed. Then, a H∞ synthesis controller is designed by using the simplified hysteretic dynamics. To enhance the H∞ performance, the inversion-based feedforward compensation is augmented. The proposed H∞ feedback control and the inversion-based feedforward can be designed separately. Finally, the experimental studies are provided to demonstrate the proposed H∞ composite control approach.

关键词： Piezoelectric actuators

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Improving the real-time performance of Ethernet for plant automation(EPA) based industrial networks

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第6期14卷 433-448页

作者： Li LU Dong-qin FENG Jian CHU Institute of Cyber-Systems and Control Zhejiang University State Key Laboratory of Industrial Control Technology Zhejiang University

Real-time Ethernet(RTE) control systems with critical real-time requirements are called fast real-time(FRT) *** improve the real-time performance of Ethernet for plant automation(EPA),we propose an EPA-FRT *** minimum macrocycle of EPA networks is reduced by redefining the EPA network frame format,and the synchronization process is modified to acquire higher accuracy.A multi-segmented topology with a scheduling scheme is introduced to increase effective bandwidth utilization and reduce protocol overheads,and thus to shorten the communication cycle *** analysis and practical tests on a prototype system show the effectiveness of the proposed scheme,which achieves the best performance at small periodic payload in large scale systems.

关键词： Ethernet for plant automation （EPA） Fast real-time （FRT） system Real-time Ethernet （RTE） Scheduling scheme171 ~ ~l ~nI~ ]Ui^umanf onrla＊ A ~｜ F numh~＊ TDg02

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Nonlinear H∞ Guidance Law Design for Near Space Interceptor based on Galerkin Simultaneous Policy Update Algorithm 33

Nonlinear H∞ Guidance Law Design for Near Space Interceptor...

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第三十三届中国控制会议

作者： GUO Chao LIANG Xiao-Geng LUO Biao School of Automation Northwestern Polytechnical University Luoyang Optoelectro Technology Development Center State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

ISBN: (纸本)9789881563842

In this paper,the nonlinear H guidance law design is proposed for the near space interceptor(NSI)based on Galerkin simultaneous policy update algorithm(GSPUA).Initially,the nonlinear H guidance law design problem for the NSI is converted to solve the Hamilton-Jacobi-Isaacs(HJI)equation,which is notoriously difficult to solve both numerically and *** the two-player zero-sum differential game theory,where the control player desires to minimize the cost function and the disturbance player desires to maximize ***,a simultaneous policy update algorithm(SPUA)is developed to solve the HJI equation,in which the control and disturbance policies are updated ***,the SPUA is implemented based on the Galerkin’s method,where the Lyapunov function equations(LFEs)in the iterative process of SPUA are ***,simulation results on the NSI demonstrate that the proposed nonlinear H guidance law is effective.

关键词： Near space interceptor(NSI),Nonlinear H_∞ control,Hamilton-Jacobi-Isaacs(HJI) equation,Galerkin simultaneous policy update algorithm(GSPUA),Guidance

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Identifying Major Factors Affecting Groundwater Change in the North China Plain with Grey Relational Analysis

Identifying Major Factors Affecting Groundwater Change in th...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Xue Li Guomin Li Yuan Zhang Key Laboratory of Engineering Geomechanics Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences National Engineering Research Center of Urban Environmental Pollution Control(The Ministry of Science and Technology of the People's Republic of China) State Environmental Protection Engineering(Beijing)Center for Industrial Wastewater Pollution Control(Ministry of Environmental Protection of the People's Republic of China) Beijing Municipal Research Institute of Environmental Protection

The North China Plain(NCP) is facing a water crisis under the dual impact of natural and anthropogenic *** levels have declined continuously since 1960,causing a series of environmental problems that have restricted sustainable development in the *** the present study,we first utilized a previously developed 3D groundwater model to determine changes in groundwater level in the region over the past 50 years(1961-2010).We then applied grey relational analysis(GRA) to identify and ordinate major factors that have contributed to these *** results show an overall decreasing trend in groundwater levels in this region over the past 50 years and an increase in the water table depth at a rate of approximately 0.36 m/*** exploitation showed the most significant correlation with the groundwater table decline,when compared with other factors including precipitation and river ***,human activities should be considered the primary force driving the groundwater level *** results of this study have implications for developing criteria that consider changes in both climate and ***,since the NCP is one of the most water-scarce and densely populated regions in the world,the analytical approach used in and the insights gained from this study are of international interest.

关键词： grey relational analysis groundwater change North China Plain

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