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Fault-Toler.nt Contr.l r.sear.h for.Networ.ed Contr.l System under.Communication Constr.ints

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自动化学报 2006年第5期32卷 659-666页

作者： HUO Zhi-Hong FANG Hua-Jing Dep.r.ment of Contr.l Science and Engineer.ng Huazhong University of Science and Technology Wuhan 430074

Imp.ementing a contr.l system over.a communication networ. induces inevitable time delays that may degr.de p.r.or.ance and even cause instability. One of the most effective ways to r.duce the negative effect of delays on the p.r.or.ance of networ.ed contr.l system (NCS) is to r.duce networ. tr.ffic. In this p.p.r. adjustable deadbands ar. exp.or.d as a solution to r.duce networ. tr.ffic in NCS. A method of fault-toler.nt contr.l of networ.ed contr.l system is p.esented, which takes into account system r.sp.nse as well as networ. tr.ffic. The integr.ty design for.a kind of NCS with sensor.failur.s and actuator.failur.s is analyzed based on r.bust fault-toler.nt contr.l theor. and infor.ation scheduling. After.detailed theor.tical analysis, the p.p.r.also p.ovides the simulation r.sults, which fur.her.validate the p.op.sed scheme.

关键词： Networ.ed contr.l system (NCS) deadbands fault-toler.nt contr.l (FTC) integr.ty design time delay

Indir.ct Adap.ive Fuzzy Outp.t Feedback Contr.l with Sup.r.isor. Contr.ller.for.Uncer.ain Nonlinear.Systems

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自动化学报 2005年第2期31卷 255-261页

作者：佟绍成柴天佑 Dep.r.ment of Mathmetics and p.ysics Liaoning Institute of Technology Jinzhou 121001 Automation r.sear.h Center.of Nor.heaster. univer.ity Shenyang 110004

In this p.p.r. an indir.ct adap.ive fuzzy outp.t feedback contr.ller.with sup.r.isor. mode for.a class of unknown nonlinear.systems is develop.d. The p.op.sed ap.r.ach does not need the availability of the state var.ables, mor.over. a sup.r.isor. contr.ller.is ap.ended to the adap.ive fuzzy contr.ller.to for.e the state to be within the constr.int set. Ther.for., if the adap.ive fuzzy contr.ller.cannot maintain the stability, the sup.r.isor. contr.ller.star.s to wor. to guar.ntee stability. On the other.hand, if the adap.ive fuzzy contr.ller.wor.s well, the sup.r.isor. contr.ller.will be de-activated. The over.ll adap.ive fuzzy contr.l scheme guar.ntees the stability of the whole closed-loop.systems. The simulation r.sults confir. the effectiveness of the p.op.sed method.

关键词：非线性系统间接自适应模糊输出反馈监督控制

A Non-Coop.r.tive Differ.ntial Game-Based Secur.ty Model in Fog Comp.ting

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china Communications 2017年第1期14卷 180-189页

作者： Zhi Li Xianwei Zhou Yanzhu Liu Haitao Xu Li Miao School of Comp.ter.and Communication Engineer.ng University of Science and Technology Beijing (USTB) Beijing 100083 China Gr.at Wall Comp.ter.Softwar. and Systems Inc. Beijing 100190 China

Fog comp.ting is a new p.r.digm p.oviding networ. ser.ices such as comp.ting, stor.ge between the end user. and cloud. The distr.buted and op.n str.ctur. ar. the char.cter.stics of fog comp.ting, which make it vulner.ble and ver. weak to secur.ty thr.ats. In this ar.icle, the inter.ction between vulner.ble nodes and malicious nodes in the fog comp.ting is investigated as a non-coop.r.tive differ.ntial game. The comp.ex decision making p.ocess is r.viewed and analyzed. To solve the game, a fictitious p.ay-based algor.thm is which the vulner.ble node and the malicious nodes r.ach a feedback Nash equilibr.um. We attain op.imal str.tegy of ener.y consump.ion with Qo S guar.ntee for.the system, which ar. conveniently op.r.ted and suitable for.fog nodes. The system simulation identifies the p.op.gation of malicious nodes. We also deter.ine the effects of var.ous p.r.meter. on the op.imal str.tegy. The simulation r.sults sup.or. a theor.tical foundation to limit malicious nodes in fog comp.ting, which can help.fog ser.ice p.ovider. make the op.imal dynamic str.tegies when differ.nt typ.s of nodes dynamically change their.str.tegies.

关键词： fog comp.ting differ.ntial game fog secur.ty feedback nash equilibr.um

Mechanisms and Kinetics of r.actions of the O( ~1D, ~ 3p.+CF_3Cl System

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Chemical r.sear.h in Chinese Univer.ities 2006年第5期22卷 663-664页

作者： ZHANG Jun SUN Xiao-min CAI Zheng-ting FENG Da-cheng Institute of Theor.tical Chemistr. Shandong University Jinan 250100 P. R. China

In the str.tosp.er., CF3Cl（ CFC 13 ） can either.p.otodecomp.se or.r.act dir.ctly with atomic oxygen to gener.te ozone-dep.eting agents such as Cl and ClO in the gas p.ase. Since the 1970s, attention has been focused on the effects of these comp.unds on the destr.ction of ozone in the str.tosp.er. and on global war.ing. Takahashi and cowor.er. detected ClO r.dicals and measur.d the p.oduct br.nching r.tios of the title r.action system via the technique of vacuum ultr.violet laser.induced fluor.scence. Yu and cowor.er. studied the mechanisms of the title r.action induced by the p.otolysis of the CF3Cl-O3 system at 253.7 nm.

关键词： CF3Cl +O(^1D, ^3p. r.te constant CVT/SCT CCUS

Biotic Homogenization Caused by the Invasion of Solidago canadensis in china

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Jour.al of Integr.tive Agr.cultur. 2013年第5期12卷 835-845页

作者： CHEN Guo-qi ZHANG Chao-bin MA Ling QIANG Sheng John ASilander.Li Li Qi Weed r.sear.h Labor.tor. Nanjing Agricultural University Dep.r.ment of Ecology and Evolutionar. Biology University of Connecticut Nor.her. Cr.p.Science Labor.tor. USDA-ARS

Although studies ar.ue that invasive sp.cies can cause biotic differ.ntiation, some cases show that biological invasions actually decr.ase biodiver.ity thr.ugh biotic homogenization. The concep. of biotic homogenization thr.ugh the invasion of a cer.ain ser.ous invasive p.ant sp.cies mer.t mor. studies. Hence, we used field sur.eys to quantitatively comp.r. invasive p.p.lations of Solidago canadensis （SC） in china with the contr.l sites （adjacent sites to SC p.esent sites yet without the sp.cies） and SC native p.p.lations in the USA. We found that p.ant communities in SC invaded habitats shar.d similar.ties with those in SC native r.nges. Br.y-Cur.is similar.ty clear.y showed that the comp.sition of p.ant communities in SC invaded habitats wer. similar.to those in SC native r.nges. Both in the native and intr.duced r.nge, p.ant communities with SC p.esent wer. char.cter.zed by SC being dominant, significantly lower.sp.cies r.chness, or.diver.ity and p.diver.ity, as well as a decr.ase in the cor.elation coefficient between geogr.p.ic distance and flor.stic similar.ties. SC favor. fer.ile and moist loam habitat, while it dominated in var.ous habitats in china, wher. mor. than 20 differ.nt dominants should have occur.ed. In conclusion, ser.ous invasive sp.cies can quickly r.model and homogenize diver.e communities by dominating them.

关键词： biodiver.ity contr.l site field sur.ey geogr.p.ic distance invasive p.p.lation native p.p.lation similar.ty

New r.sults on Global Synchr.nization of Chua's Cir.uit

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自动化学报 2005年第2期31卷 320-326页

作者：廖晓昕罗海庚张刚蹇继贵宗校军徐炳吉 Dep.r.ment of Contr.l Science and Engineer.ng Huazhong University of Science and Technology Wuhan 430070

Some new r.sults on global exp.nential synchr.nization and global synchr.nization for.Chua's cir.uit ar. der.ved by means of Lyap.nov functions and some other.mathematic methods,which imp.ove the existing r.sults in the liter.tur.s. A str.ct and comp.ete p.oof of the r.sult is also given as a comp.ement to the r.levant liter.tur. wher. the p.oof was incomp.ete. The p.p.r.offer. some new ap.r.aches for.studying chaos synchr.nization for.Chua's cir.uit.

关键词： Chua电路全局同步全局函数同步结果

Stabilization for.a Class of Stochastic T-S Fuzzy Systems with differ.nt p.emises 25th

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Stabilization for a Class of Stochastic T-S Fuzzy Systems wi...

p.edictive Comp.nsation for.Stochastic Time Delay in Networ. Contr.l Systems

第25届中国控制与决策会议

作者： Liangliang Zhang Shaosheng Zhou Institute of Infor.ation and Contr.l Department of Automation Hangzhou Dianzi University

ISBN: (纸本)9781467355322

This p.p.r.focuses on investigating stochastic analysis and stabilization p.oblem for.a class of stochastic T-S model based systems in which the fuzzy contr.ller.does not shar. the same p.emises as those of the fuzzy model. Under.a hyp.thesis for.the fuzzy basis functions of the p.ant and contr.ller. an LMI based contr.l design ap.r.ach is p.op.sed by using a common quadr.tic Lyap.nov function. The r.sult is finally illustr.ted by a numer.cal examp.e.

关键词： stochastic fuzzy system stochastic stability T-S model differ.nt p.emises quadr.tic Lyap.nov function

来源： cnki会议评论

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自动化学报 2005年第2期31卷 231-238页

作者：余世明杨马英俞立 College of Infor.ation Engineer.ng Zhejiang University of Technology Hangzhou 310014

This p.p.r.p.op.ses a p.edictive comp.nsation str.tegy to r.duce the detr.mental effect of stochastic time delays induced by communication networ.s on contr.l p.r.or.ance. Values of a manip.lated var.able at the p.esent samp.ing instant and futur. time instants can be deter.ined by p.r.or.ing a r.ceding hor.zon op.imal p.ocedur. only once. When the p.esent value of the manip.lated var.able does not ar.ive at a smar. actuator. its p.edictive one is imp.sed to the cor.esp.nding p.ocess. Switching of a manip.lated var.able between its tr.e p.esent value and the p.edictive one usually r.sults in unsmooth op.r.tion of a contr.l system. This p.p.r.shows: 1) for.a steady p.ocess,as long as its inp.t is sufficiently smooth, the smoothness of its outp.t can be guar.nteed; 2) a manip.lated var.able can be switched smoothly by filter.ng the manip.lated var.able just using a simp.e low-p.ss filter. Thus the contr.l p.r.or.ance can be imp.oved. Finally, the effectiveness of the p.op.sed method is demonstr.ted by simulation study.

关键词：网络控制系统随机传输时延预测补偿模型预测控制低通过滤

STABILITY OF MOTION FOr.A CONSTr.INED BIr.HOFF'S SYSTEM IN TEr.S OF INDEp.NDENT VAr.ABLES

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Ap.lied Mathematics and Mechanics(English Edition) 1997年第1期18卷 55-60页

作者：梅凤翔 Dep.r.ment of Ap.lied Mechanics Peking Institute of Technology Beijing P. R. China

This p.p.r.p.op.ses fir.tly the p.aff-Bir.hoff-D ’Alember. s p.incip.e and obtainsthe equations of motion in ter.s of the indep.ndent var.ables for.a constr.inedBir.hoff’s system fr.m the p.incip.e. Secondly, it establishes the equations ofp.r.ur.ation of the system. Finally, it obtains the stability cr.ter.a by using theLiaqp.nov dir.ct method and the fir.tly ap.r.ximate method.

关键词： dynamics Bir.hoff’s system stability of motion