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基于D-S证据理论的分布式入侵检测方法研究

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计算机工程与应用 2004年第13期40卷 167-169,188页

作者：王勇王行愚张瑞霞华东理工大学信息技术与工程中心桂林电子工业学院网络中心广西桂林541004

入侵检测系统是信息安全的一种重要手段,该文提出了一种基于D-S证据理论的分布式入侵检测系统模型,讨论了其实现方法,并进行了仿真实验,仿真实验表明经过多传感器数据融合后得到的结果优于单传感器得到的结果。

关键词：分布式入侵检测 D—S证据理论数据融合关联规则

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维普期刊数据库

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Robust LQR Tracking Control for a Class of Affine Nonlinear Uncertain Systems

Robust LQR Tracking Control for a Class of Affine Nonlinear ...

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第24届中国控制与决策会议

作者： Hai-Ping Pang, Qing Yang college of Automation and Electronic engineering, Qingdao university of Science and technology, Qingdao 266042

A new linear quadratic regulator （LQR） strategy is presented to realize robust tracking control for a class of nonlinear uncertain systems with reference input given by a time-varying exosystem. To avoid the difficulty of solving the nonlinear two-point boundary-value （TPBV） problem, which is induced by LQR for nonlinear systems, the input-output linearization technique is adopted to transform the nonlinear system into an equivalent linear system. Considering the exosystem, the tracking error state equation is established and the LQR is designed based on the error equation by ignoring uncertainties. However, the optimal controller for the nominal system is very sensitive to uncertainties, so the sliding mode control （SMC） is used to robustify the LQR. By constructing an optimal integral sliding surface and selecting an appropriate control law, the system exhibits global robustness to uncertainties and the ideal sliding mode dynamics is the same as that of optimal LQR for the nominal system. So a robust LQR tracking controller （RLQRTC） is realized. Simulation results show that the good tracking performance can be achieved and the uncertainties can be compensated using this proposed controller.

关键词： LQR Sliding mode control Exosystem Tracking control Nonlinear systems Uncertainties

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A Review of Studies in Flocking for Multi-robot System

A Review of Studies in Flocking for Multi-robot System

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2010 International Conference on Computer,Mechatronics, Control and Electronic engineering (CMCE 2010)

作者： Mao Yang,Gan-gui Yan Electrical engineering college Northeast Dianli university Jilin,china Yan-tao Tian School of Communication engineering Jilin university Changchun,china Yan-tao Tian School of Communication engineering Jilin university Changchun, china

As a traditional assignment of multi-robot system,flocking draws much attention recently and numerous methods are *** this survey we present the flocking research and characteristics which focus on the development in the past six years.A new direction of flocking is proposed in this paper,through which we can realize the flocking in a dynamic *** the rapid development of the technology,some novel methods are used to feature ***,we demonstrate the state and possible challenges of flocking and some valuable advices about the development trend of flocking.

关键词： flockingt multi-robot control methods

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The Lower Triassic cyclic deposition in Chaohu,Anhui Province,china

The Lower Triassic cyclic deposition in Chaohu,Anhui Provinc...

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安徽省古生物学会2010年学术研讨会

作者： Li Shuangying a, *, Tong Jinnan b, Liu Kongyan a, Wang Fanjian a, Huo Yangyanga a college of Resources and Environmental engineering, Hefei university of technology, Hefei 230009, china b Faculty of Earth Sciences, china university of Geosciences, Wuhan 430074, china

The Lower Triassic strata developed in Chaohu, Anhui Province of east central china, including the Yinkeng, Helongshan and Nanlinghu formations is about 250 m thick and consists of carbonate rocks such as micrite limestone and nodular limestone as well as shale and argillaceous mudstone. The deficiency of sedimentary structures and bioclastic particles and presence of pyrite and high ratios of V/(V+Ni) suggest that the Lower Triassic strata formed in a quiet, open-marine basin environment bordering carbonate slope and lower slope.

关键词： depositional cycle the Lower Triassic Chaohu of Anhui Province, china

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The Formation of Nano- antibacterial Layer On The Surface of Cashmere Fiber

The Formation of Nano- antibacterial Layer On The Surface of...

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第一届全国化学工程与生物化工年会

作者： Niu Mei Wei Liqiao WangShuhua XuBingshe (college of Material Science & engineering Taiyuan university of technology Taiyuan 030024)

＜正＞ It studies natural cashmere fibers surface modification by using chemical method, that is, putting to use inductive outfield conditions-ultraviolet radiation and nano-antibacterial agent solution. Physical shapes and chemical structures will be changed. New functions and properties are given to cashmere fibers.

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Structure and Electrochemistry of Carbon-bridged Diferrocenyl Compounds

Structure and Electrochemistry of Carbon-bridged Diferroceny...

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第十六届全国金属有机化学学术讨论会

作者： Ruijun Xie,Limin Han and Quanling Suo college of Chemical engineering,Inner Mongolia university of technology,Hohhot 010051

Four carbon-bridged diferrocenyl compounds:FcC(CH

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Researches Progress on Complexity Drivers of Soil and Water Resources Utilization Structure

Researches Progress on Complexity Drivers of Soil and Water ...

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寒区冰情与冻土水文效应——第4届“寒区水资源及其可持续利用”学术研讨会

作者： Feifei ZHAO~1,Dong LIU~2,Ping LV~3 1 School of Water Conservancy & civil engineering,Harbin Heilongjiang,150030,china 2 Postdoctoral Scientific Research Mobile Station of Agriculture and Forestry Economic Management, Northeast Agricultural university,Harbin Heilongjiang,150030,china 3 School of Water Conservancy & civil engineering,Harbin Heilongjiang,150030,china

Soil and water resources utilization structure change caused by global changes is the starting point of soil and water resources *** difficulty in soil and water resources utilization structure study is driving mechanism *** influences of water and soil resources utilization structure were caused by driving *** the real motivation behind the soil and water use change and their interacting mechanism is helpful to improve the comprehensive utilization efficiency of soil and water resources,ease sharp contradictions of oil and water resources utilization,and promote sustainable society development. How to organically combine two systems of water and soil resource,discriminate driving factors in particular space-time scale level,and analyze main driving forces of water and soil resources utilization structure change,sum up driving mechanism of complex systems on water and soil resources utilization structure, which are research emphasis in the *** is potential power to identify soil and water resources utilization structure,find out reasons for soil and water resources utilization structure *** on the review and summarize about driving factors identification and the methods of driving mechanism,this article analyzes the existing problems in the current studies,and proposes the developing trend of soil and water resources utilization structure change study.

关键词： soil and water resources utilization structure complexity driving mechanism research progress

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Feedback Linearization Optimal Disturbances Rejection Approach of Bilinear Systems

Feedback Linearization Optimal Disturbances Rejection Approa...

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第三十届中国控制会议

作者： GAO De-Xin~(1,2),YANG Xiao-Yan~2,CUI Bao-Tong~1 1.School of Internet of Things engineering,Jiangnan university WuXi,214122,P.R.china 2.college of Automation and Electronic engineer,Qingdao university of Science & technology,Qingdao 266042,P.R.china

＜正＞This paper considers the optimal control problem for the bilinear system affected by measurable disturbances based on state feedback ***,the model of the bilinear system affected by the disturbances is changed to an affine nonlinear system affected by ***,according to the concept of relative order of the output with respect to the input,we change a nonlinear system to a pseudo linear system model through the coordinate transformation,Then based on the theory of linear quadratic optimal control,the optimal controller is *** solving the Riccati equation and the Sylvester equation,a feedforword/feedback transformation is designed which is used to eliminate the influence of the *** last, the simulation results show the effectiveness of the method.

关键词： Bilinear system Feedback linearization Optimal Control Disturbance Rejection

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浇筑层网格对混凝土浇筑块温度及应力计算的影响

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水电能源科学 2009年第2期27卷 104-106,115页

作者：黄耀英周宜红三峡大学土木水电学院湖北宜昌443002

研究了浇筑层不同网格剖分对浇筑块温度及应力计算精度的影响,对比分析了混凝土表面放热系数、绝热温升速率及时间步长等因素对浇筑层不同网格剖分计算结果的影响。结果表明,较粗的有限元网格虽能获得良好的温度计算结果,但较密的有限... 详细信息

研究了浇筑层不同网格剖分对浇筑块温度及应力计算精度的影响,对比分析了混凝土表面放热系数、绝热温升速率及时间步长等因素对浇筑层不同网格剖分计算结果的影响。结果表明,较粗的有限元网格虽能获得良好的温度计算结果,但较密的有限元网格更能满足应力的计算。

关键词：浇筑层网格剖分温度应力

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维普期刊数据库

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Maximal Power Point Tracking under Speed-Mode Control for Wind Energy Generation System with Doubly Fed Introduction Generator

Maximal Power Point Tracking under Speed-Mode Control for Wi...

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CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： Y. Zhao X. D. Zou Y. N. Xu Y. Kang and J. Chen Huazhong university of Science and technology / Electrical and Electronic college Wuhan china Hubei university of technology / School of Electrical and Electronic engineering Wuhan china

＜正＞The Doubly Fed Induction Generator （DFIG） with back-to-back four-quadrant converters between its rotor winding and the grid can realize the maximal wind energy capture in variable-speed wind energy generation system. Based on the stator flux-oriented excitation vector control strategy, this paper presents that the system dynamic characteristics under speed-mode control are superior to the dynamic characteristics under current-mode control in the process of Maximum Power Point Tracking （MPPT） and brings forward the explanation based on state space theory. And it designs the gains of two typical PI controllers in the current inner loop and the speed outer loop under speed-mode control based on Internal Model Control （IMC） theory and pole assignment method, respectively. At last, simulation results in MATLAB/ SIMULINK are put forward to verify the good static and dynamic performance of the designed closed-loop control system.

关键词： Doubly Fed Induction Generator (DFIG) current-mode control speed-mode control PI controller Internal Model Control (IMC) pole assignment

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