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H2 /H∞ control of networked control system with random time delays

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Science china(information Sciences) 2011年第12期54卷 2635-2650页

作者： QIU Li 1,2 , XU BuGong 1 & LI ShanBin 1 1 college of Automation Science and engineering, South china university of technology, Guangzhou 5.0640, china 2 college of Mechatronics and Control engineering, Shenzhen university, Shenzhen 5.8060, china 1. college of Automation Science and engineering South China University of Technology Guangzhou 510640 China2. College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China

This paper investigates the H 2 /H ∞ control problem for a class of discrete-time networked control systems with random communication time delays. Both sensor-to-controller (S-C) and controller-to-actuator (C-A) random network-induced delays are considered. Two independent Markov chains are used to model the S-C and C-A random delays. The resulting closed-loop system is a jump linear time-delay system induced by two Markov chains. Sufficient conditions for existence of H 2 /H ∞ controller are established by free-weighting matrix and stochastic Lyapunov functions. A simulation example illustrates the effectiveness of the proposed method.

关键词： H 2 /H ∞ control networked control systems Markov chains random time delays

On adjacent-vertex-distinguishing total coloring of graphs

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Science china Mathematics 2005年第3期48卷 289-299页

作者： ZHANG Zhongfu, CHEN Xiang’en, LI Jingwen, YAO Bing, LU Xinzhong & WANG Jianfang college of Mathematics and information Science, Northwest Normal university, Lanzhou 730070, china Department of Computer, Lanzhou Normal college, Lanzhou 730070, china Institute of Applied Mathematics, Lanzhou Jiaotong university, Lanzhou 730070, china college of information and Electrical engineering, Lanzhou Jiaotong university, Lanzhou 730070, china Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, china 1. college of Mathematics and information Science Northwest Normal University 730070 Lanzhou China 2. Department of Computer Lanzhou Normal College 730070 Lanzhou China 3. Institute of Applied Mathematics Lanzhou Jiaotong University 730070 Lanzhou China 4. college of information and Electrical engineering Lanzhou Jiaotong University 730070 Lanzhou China 5. Institute of Applied Mathematics Chinese Academy of Sciences 100080 Beijing China

In this paper, we present a new concept of the adjacent-vertex-distinguishing total coloring of graphs (briefly, AVDTC of graphs) and, meanwhile, have obtained the adjacent-vertex-distinguishing total chromatic number... 详细信息

关键词： graph, proper total coloring, adjacent-vertex-distinguishing total coloring, adjacent-vertex-distinguishing total chromatic number.

The study on stability and reliability of the nuclear detector

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The study on stability and reliability of the nuclear detect...

Sensing Time Optimization in Energy-Harvesting Cognitive Radio with Interference Rate Control

Measurement Touch the World——IEEE 2011 10th International Conference on Electronic Measurement & Instruments(ICEMI’2011)

作者： Wu Yini Wu Jianping Luo Yaoyao Wu Haibiao Cheng Guodong college of Nuclear technology and Automatic engineering chengdu university of technology Provincial Key Lab of Applied Nuclear Techniques in Geosciences chengdu 610059 sichuan china

Because of measurement environment and its own performance defect,the poor stability of nuclear radiation detector used on portable nuclear instrument leads to spectrum drift and decrease of energy resolution,which causes reduction of the detect *** results in lower measurement precision and accuracy of the ***,the stabilization method based on hardware and software was *** is difficult to solve the problem about Spectrum drift caused by multiple *** slove the nonlinear problems caused by interference source,Multi-sensor Data Fusion Technique is adopt to design the intelligent nuclear detector with the Self-compensation *** shows that the results of the project can improve the stability and reliability of the fieldwork measurement in system of the nuclear *** that it will improve the adaptive ability of the nuclear instruments to measuring environment.

关键词： Nuclear detector Spectrum drift Stability Multi-sensory information fusion

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china Communications 2016年第1期13卷 47-56页

作者： DENG Zhian LIU Xin JIA Min LU Weidang School of information Science and technology Dalian Maritime University School of information and Communication engineering Dalian University of Technology Communication Research Centre Harbin Institute of Technology college of information engineering Zhejiang University of Technology

In this paper,an energy-harvesting cognitive radio(CR) is considered,which allows the transmitter of the secondary user(SU) to harvest the primary signal energy from the transmitter of the primary user(PU) when the presence of the PU is *** the harvested energy is converted into the electrical power to supply the transmission of the SU at the detected absence of the *** adopting the periodic spectrum sensing,the average total transmission rate of the SU is maximized through optimizing the sensing time,subject to the constraints of the probabilities of false alarm and detection,the harvested energy and the interference rate *** simulation results show that there deed exists an optimal sensing time that maximizes the transmission rate,and the maximum transmission rate of the energy-harvesting CR can better approach to that of the traditional CR with the increasing of the detection probability.

关键词： cognitive radio spectrum sensing energy detection energy harvest transmission rate

Online diagnosis of electron excitation temperature in CH_4+H_2 discharge plasma at atmospheric pressure by optical emission spectra

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Science china(Physics,Mechanics & Astronomy) 2008年第12期51卷 1892-1896页

作者： CUI JinHua1, XU ZhenFeng2, ZHANG JiaLiang3↑, NIE QiuYue3, XU GenHui4 & REN LongLiang5.1 Faculty of Chemistry and Chemical engineering, Liaoning Normal university, Dalian 116021, china 2 Technique Center for Modern Education, Liaodong college, Dandong 126709, china 3 State Key Laboratory for Materials Modification by Laser, Ion and Electron Beams, Dalian university of technology, Dalian 116023, china 4 college of Chemical engineering, Tianjin university, Tianjin 300072, china 5.Department of Physics, Science college, Tianjin university, Tianjin 300072, china 1. Faculty of Chemistry and Chemical engineering Liaoning Normal University Dalian 116021 China 2. Technique Center for Modern Education Liaodong College Dandong 126709 China 3. State Key Laboratory for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116023 China 4. college of Chemical engineering Tianjin University Tianjin 300072 China 5. Department of Physics Science College Tianjin University Tianjin 300072 China

Methane coupling under low temperature plasmas at atmospheric pressure is a green process by use of renewable sources of energy. In this study, CH4+H2 dis- charge plasma was on-line diagnosed by optical emission spectra so as to char- acterize the discharge system and to do spade work for the optimization of the technical parameters for future commercial production of methane coupling under plasmas. The study was focused on a calculation method for the online diagnosis of the electron excitation temperature in CH4+H2 discharge plasma at atmospheric pressure. The diagnostic method is easy, efficient and fairly precise. A serious er- ror in a literature was corrected during the reasoning of its series of equations formerly used to calculate electron temperatures in plasmas.

关键词： low temperature plasma electron excitation temperature optical emission spectrum online diagnosis

A New Clustering Algorithm for Categorical Attributes

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International Journal of Minerals,Metallurgy and Materials 2000年第4期14卷 318-322页

作者： Songfeng Lu, Zhengding Lu (college of Computer Science and technology, Huazhong university of Science and technology, Wuhan 430074, china) college of Computer Science and technology Huazhong University of Science and Technology Wuhan 430074 China

In traditional data clustering, similarity of a cluster of objects is measured by distance between objects. Such measures are not appropriate for categorical data. A new clustering criterion to determine the similarity between points with categorical attributes is pre- sented. Furthermore, a new clustering algorithm for categorical attributes is addressed. A single scan of the dataset yields a good clus- tering, and more additional passes can be used to improve the quality further.

关键词： data mining clustering similarity information

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用FPGA实现图象格式的转换

四川大学学报（自然科学版） 2002年第1期39卷 158-160页

作者：邓蕾四川大学电子信息学院成都610064

In multimedia image transferring, it is necessary to transform analog vedio signal to the input signal that could be used in low bit rate compressing encoding standard. A method is introduced, with which the format of CCIR 601 of the luminance and chroma signals can be transformed into the format of SQCIF. And the realization with FPGA is also given.

关键词：多媒体通信图像传输视频编码 FPGA 现场可编程门阵列图像格式转换 SQCIF格式

Pointwise estimates for the maximal multilinear singular integral operators

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Science china Mathematics 2005年第12期48卷 1696-1706页

作者： HU Guo’en, LI Dengfeng & LU Shanzhen Department of Applied Mathematics, university of information engineering, P. O. Box 1001 -747, Zhengzhou 45.002, china college of Mathematical and information Sciences, Henan university, Kaifeng 475.01, china Department of Mathematics, Beijing Normal university, Beijing 100875. china 1. Department of Applied Mathematics University of Information Engineering P.O.Box 1001-747 450002 Zhengzhou China 2. college of Mathematical and information Sciences Henan University 475001 Kaifeng China 3. Department of Mathematics Beijing Normal University 100875 Beijing China

Two pointwise estimates relating the maximal multilinear singular integral operators and some classical maximal operators are established. These pointwise estimates imply the rearrangement estimate and the BLO(Rn) est... 详细信息

关键词： multilinear singular integral,maximal operator,BMO (Rn),BLO (Rn).

Fractal on Particle Movement in Storm Steady Current Field of the Permian in Xingwen World Geopark

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四川地质学报 2009年第S1期29卷 145-152页

作者： LIU Zuhan 1,ZHANG Bin 1,WANG Lili 2,SHUI Wei 3,OUYANG-Shujian 3(1.Land and Resources college,china West Normal university,Nanchong 637002,china 2.information Management college,chengdu university of technology,chengdu,610059,china 3.Agronomy college,sichuan Agricultural university,Ya’an,625.14,china)

The particle is not the continuous but fractal *** has a diverse scale from several to *** different density function of the particle system,mutual influences among factors can be get;especially in the micro aspect,fractal dimension of particle radius distribution influences the system and has a significance to denote the fluidity of the *** influences among the particle size,spatial coordinates,density(or concentration) and time are analyzed theoretically and *** to first-grade reaction diffusion model of fractal medium DLK model,the movement of the Brown particle and thermodynamics theory of mechanics can be popularized to the storm current field and gets Γ(t)-D model.

关键词： particle stable current field fractal dimension Xingwen