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Social network users clustering based on multivariate time series of emotional behavior

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The Journal of China Universities of Posts and Telecommunications 2014年第2期21卷 21-31页

作者： ZHU jiang WANG Bai WU bin School of Computer Science Beijing University of Posts and Telecommunications

It is known that the social network is an excellent source for gathering the emotions of people. There are thousands of micro-blogs posted in every second and every micro-blog that may contain a variety of user＇s emotions. The users＇ collective emotional behaviors are with great impacts on today＇s societies, so it is good to find groups for society management based on users＇ emotional behavior. This article focuses on analyzing multivariate emotional behavior of users in social network and the goal is to cluster the users from a fully new perspective-emotions. The following tasks are completed： firstly, the multivariate emotion of Chinese micro-blog with vector is analyzed, and multivariate time series to describe the user＇s emotional behavior are constructed. Seconedly, considering principal component analysis （PCA） in similarity and distance similarity, the similarity of the multivariate emotion time series is measured. The contribution could be summarized as follows： groups of users though different emotions in social network are discovered. The emotional fluctuation and intensity of users are considered as well. Experiment in clustering effectively illustrates the emotional behavior characteristics of the Users in different groups.

关键词： social network multivariate emotional behavior PCA similarity distance similarity

Adv Paxos: making classical Paxos more efficient

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The Journal of China Universities of Posts and Telecommunications 2019年第5期26卷 33-40,59页

作者： Li bin jiang jianguo Yuan Kaiguo Beijing Jiaotong University Beijing 100044China National Secrecy Science and Technology Evaluation Center Beijing 100044China Institute of Information Engineering Chinese Academy of SciencesBeijing 100093China Beijing University of Posts and Telecommunications Beijing 100876China

Paxos is a well-known distributed algorithm that provides strong ***,the original Paxos has several shortcomings,including those of slow elections,redundant communications and excessive traffic of the coordinator *** order to tackle the above deficiencies,the design of advanced edition of Paxos(Adv Paxos)was proposed,which is a new distributed consensus algorithm that is derived from Basic *** paper analyzes the behavior of each character of the original algorithm during each of its *** optimizing the behavior of the proposer and acceptor,a series of behavioral optimization measures was proposed,which included distance related waiting mechanisms,optimization of the number of proposals,self-learning and a reduction in broadcast *** theoretical analysis and experimentation,it is demonstrated that the new algorithm has a lower probability of livelock without a reduction in reliability,faster agreement reaching speeds,lower communication costs among server clusters and higher percentage of successful proposals.

关键词： consensus Paxos behavior optimizing performance

Controllability of Spacecraft Attitude and Its Application in Reconfigurability Analysis

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第2期36卷 189-196页

作者： YANG Hao MENG Qingkai jiang bin College of Automation Engineering Nanjing University of Aeronautics and Astronautics

We review the controllability research on spacecraft attitude based on nonlinear geometry control *** existing studies on attitude controllability are mostly concerning the global controllability and small time local controllability(STLC).A presentation of study methods and connotation in both aspects is briefly carried *** a necessary condition of reconfigurability,the controllability of the faulty attitude control system is ***,two reconfigurability conditions based on controllability results that consider the actuator faults for a pyramid configuration spacecraft are provided.

关键词： controllability spacecraft attitude control geometry control theory fault.tolerant control

Spurious symmetry-broken phase in a bidirectional two-lane ASEP with narrow entrances

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Chinese Physics B 2017年第2期26卷 93-98页

作者： Bo Tian Rui jiang Mao-bin Hu bin Jia School of Engineering Science University of Science and Technology of China Hefei 230026 China School of Traffic and Transportation Beijing Jiaotong University Beijing 100044 China

As one of the paradigmatic models of non-equilibrium systems, the asymmetric simple exclusion process（ASEP） has been widely used to study many physical, chemical, and biological systems. The ASEP shows a range of nontrivial macroscopic phenomena, among which, the spontaneous symmetry breaking has gained a great deal of attention. Nevertheless,as a basic problem, it has been controversial whether there exist one or two symmetry-broken phases in the ASEP. Based on the mean field analysis and current minimization principle, this paper demonstrates that one of the broken-symmetry phases does not exist in a bidirectional two-lane ASEP with narrow entrances. Moreover, an exponential decay feature is observed,which has been used to predict the phase boundary in the thermodynamic limit. Our findings might be generalized to other ASEP models and thus deepen the understanding of the spontaneous symmetry breaking in non-equilibrium systems.

关键词： Spontaneous symmetry breaking mean field analysis ASEP

Preface——Special Issue on New Directions in Nonlinear and Distributed Control

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Journal of Systems Science & Complexity 2018年第1期31卷 1-3页

作者： LIU Tengfei XIN bin jiang Zhong-Ping State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110819 China School of Automation State Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of Technology Beijing 100081 China Tandon School of Engineering New York University Brooklyn NY 11201 USA

Nonlinearity is ubiquitous in engineering and natural *** development of nonlinear control can be traced back to decades *** date,the research has reached the stage that emphasizes developing methodologies that can ha... 详细信息

关键词：控制问题非线性分布式工程应用程序电子物理自然系统生产线相互作用

Survey on nonlinear reconfigurable flight control

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Journal of Systems Engineering and Electronics 2013年第6期24卷 971-983页

作者： Xunhong Lv bin jiang Ruiyun Qi Jing Zhao College of Automation Engineering Nanjing University of Aeronautics and Astronautics

An overview on nonlinear reconfigurable flight control approaches that have been demonstrated in flight-test or highfidelity simulation is presented. Various approaches for reconfigurable flight control systems are considered, including nonlinear dynamic inversion, parameter identification and neural network technologies, backstepping and model predictive control approaches. The recent research work, flight tests, and potential strength and weakness of each approach are discussed objectively in order to give readers and researchers some reference. Finally, possible future directions and open problems in this area are addressed.

关键词： reconfigurable flight control (RFC) nonlinear dynamic inversion (NDI) backstepping neural network (NN) model predictive control (MPC) parameter identification (PID) adaptive control flight control.

Fault tolerant control for near space vehicle:a survey and some new results

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Journal of Systems Engineering and Electronics 2011年第1期22卷 88-94页

作者： Yufei Xu bin jiang Zhifeng Gao Ke Zhang College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China

A review on fault-tolerant control（FTC） for near space vehicle（NSV） is ***,the concept of near space is introduced,the background of NSV is emphasized,and the model characteristics of NSV in faulty case are ***,a comparison of different existing approaches is briefly carried out,and achievements on the current research in this field are also presented in the view of the practical ***,several existing advanced FTC results for nonlinear flight control systems are ***,the recent literature of NSV are presented to provide an overall view of future developments in this area.

关键词： near space vehicle(NSV) fault-tolerant control(FTC) adaptive sliding mode.

CALIBRATION OF A 6-DOF SPACE ROBOT USING GENETIC ALGORITHM

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Chinese Journal of Mechanical Engineering 2008年第6期21卷 6-13页

作者： LIU Yu jiang Yanshu LIANG bin XU Wenfu College of Science and Technology Harbin Institute of Technology Harbin 150001 China Department of Automation Harbin University of Science and Technology Harbin 150008 China Colloge of Science and Technology Harbin Institute of Technology Harbin 150001 China

The kinematic error model of a 6-DOF space robot is deduced, and the cost function of kinematic parameter identification is built. With the aid of the genetic algorithm （GA） that has the powerful global adaptive probabilistic search ability, 24 parameters of the robot are identified through simulation, which makes the pose （position and orientation） accuracy of the robot a great improvement. In the process of the calibration, stochastic measurement noises are considered. Lastly, generalization of the identified kinematic parameters in the whole workspace of the robot is discussed. The simulation results show that calibrating the robot with GA is very stable and not sensitive to measurement noise. Moreover, even if the robot＇s kinematic parameters are relative, GA still has strong search ability to find the optimum solution.

关键词： Robot calibration Position and orientation accuracy Measurement noises Genetic algorithm

Dynamic Characteristics of Hydrocarbon Fuel within the Channel at Supercrit- ical and Pyrolysis Condition

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Journal of Thermal Science 2017年第6期26卷 560-569页

作者： YU bin ZHOU Weixing QIN jiang BAO Wen Harbin Institute of Technology 150001 Heilongjiang China

Regenerative cooling with fuel as the coolant is used in the scramjet engine. In order to grasp the dynamic cha- racteristics of engine fuel supply processes, this article studies the dynamic characteristics of hydrocarbon fuel within the channel. A one-dimensional dynamic model was proved, the thermal energy storage effect, fuel volume effect and chemical dynamic effect have been considered in the model, the ordinary differential equations were solved using a 4th order Rungc-Kutta method. The precision of the model was validated by three groups of expe- rimental data. The effects of input signal, working condition, tube size on the dynamic characteristics of pressure, flow rate, temperature have been simulated. It is found that cracking reaction increased the compressibility of the fuel pyrolysis mixture and lead to longer responding time of outlet flow. The responding time of outlet flow can reach 3s when tube is 5m long which will greatly influence the control performance of the engine thrust system. Meanwhile, when the inlet flow rate appears the step change, the inlet pressure leads to overshoot, the overshoot can reach as much as 100%, such highly transient impulse will result in detrimental effect on fucl pump.

关键词： dynamic characteristics n-Decane supercritical pyrolysis