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Second-or.er.consensus in networ.s of dynamic agents with communication time-delays

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Jour.al of Systems engineering and Electr.nics 2010年第1期21卷 88-94页

作者： Bo Yang1,2, Huajing Fang3. and Hua Wang4 1. School of Navigation, wuhan university of technology, wuhan 43.063. p. r. china 2. wuhan Second Ship.Design and r.sear.h Institute, wuhan 43.064, p. r. china 3. department of control science and engineering, huazhong university of science and technology, wuhan 43.074, p. r. china 4. department of Aer.sp.ce and Mechanical {13., Boston university, Boston MA02215, USA School of Navigation Wuhan University of Technology Wuhan 430063 P. R. China wuhan Second Ship.Design and r.sear.h Institute Wuhan 430064 P. R. China department of control science and {3. Huazhong University of Science and Technology Wuhan 430074 P. R. China department of Aer.sp.ce and Mechanical engineering Boston University Boston MA02215 USA

This p.p.r.p.op.ses second-or.er.consensus p.otocols with time-delays and gives the measur. of the r.bustness of the p.otocols to the time-delay existing in the networ. of agents with second-or.er.dynamics. By emp.oying a fr.quency domain method, it is p.oven that the infor.ation states and their.time der.vatives of all the agents in the networ. achieve consensus asymp.otically, r.sp.ctively, for.ap.r.p.iate communication timedelay if the top.logy of weighted networ. is connected. p.r.icular.y, a tight up.er.bound on the communication time-delay that can be toler.ted in the dynamic networ. is found. The consensus p.otocols ar. distr.buted in the sense that each agent only needs infor.ation fr.m its neighbor.ng agents, which r.duces the comp.exity of connections between neighbor.ng agents significantly. Numer.cal simulation r.sults ar. p.ovided to demonstr.te the effectiveness and the shar.0}ess of the theor.tical r.sults for.second-or.er.consensus in networ.s in the p.esence of communication time-delays.

关键词： second-or.er.consensus p.otocols dynamic networ.s algebr.ic gr.p. theor. fr.quency domain analysis com-munication constr.ints.

An Automatic Testing System of Scheduling Str.tegies in r.al-Time UNIX

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Jour.al of Systems engineering and Electr.nics 2001年第2期12卷 59-62页

作者： Qin Xiao, p.ng Lip.ng & Han Zongfen department of Comp.ter.science, huazhong university of science and technology,{3., p. r. china department of Comp.ter.science Huazhong University of Science and Technology Wuhan 430074 P. R. China

This p.p.r.p.op.ses a for.al model of the automatic testing system for.scheduling str.tegies in r.al-time UNIX and descr.bes the algor.thm of the key p.r. of the system. The model of the system is an imp.r.ant technology of the automatization of softwar. develop.ent. Accor.ing to the model p.esented in the p.p.r. many differ.nt kinds of automatic testing systems can be designed and develop.d easily. At the end of the p.p.r. the p.ototyp. p.oves the feasibility of the model and design.

关键词： Algor.thms Automatic testing r.al time systems Scheduling Softwar. p.ototyp.ng

An AI Embedded Object-Or.ented Ap.r.ach for.For.ulating Comp.table Gener.l Equilibr.um

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Jour.al of Systems engineering and Electr.nics 2000年第1期11卷 14-21页

作者： Li Tong (department of Automatic control engineering,{3., wuhan 43.074, p. r. china) Chen Shuheng (department of Economics, National Chengchi university, Taip.i, 11623. Feng Shan (department of Automatic control department of Automatic control engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China department of Economics National Chengchi University Taipei 11623

This p.p.r.p.op.ses and illustr.tes an AI embedded object-or.ented methodology to for.ulate the comp.table gener.l equilibr.um (CGE) models. In this fr.mewor., a CGE model is viewed as a collection of objects embedded AI or.namely agents in comp.ter.wor.d, cor.esp.nding to economic agents and entities in r.al wor.d, such as gover.ment, households, mar.ets and so on. A fr.me r.p.esentation of major.objects in CGE model is used for.tr.de and envir.nment. Embedded Al object-or.ented ap.r.ach (or.softwar. agent) is used in the CGE model r.p.esentation can able to nar.ow the gap.among the semantic r.p.esentation, for.al CGE (mathematical) r.p.esentation and comp.ter.and algor.thm r.p.esentation, and to imp.ove CGE in under.tanding and maintenance etc. In such a system, constr.cting a CGE model to ap.ear.an intuitive p.ocess r.ther.than an abstr.ct p.ocess. This intuitive p.ocess needs mor. under.tanding of the substance of economics and the logic under.ying the p.oblem r.ther.than mathematical notation.

关键词： Comp.table gener.l equilibr.um Ar.ificial intelligence Object-or.ented method Agents.

Fuzzy MCDM Based on Fuzzy r.lational Degr.e Analysis

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Jour.al of Systems engineering and Electr.nics 2002年第1期13卷 1-7页

作者： Song Yexin Dep.. of Basic Cour.es, Naval university of engineering, wuhan 43.03.,p.r.{3. Chen Mianyun Dep.. of control science and engineering, huazhong university of science and technology, wuhan 43.074,p.r.{3. Dep.. of Basic Cour.es Naval University of Engineering Wuhan 430033 P. R. China Dep.. of control science and engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China

This p.p.r.p.esents a new fuzzy multip.e cr.ter.a (both qualitative and quantitative) decision-making (MCDM) method based on fuzzy r.lational degr.e analysis. The concep.s of fuzzy set theor. ar. used to constr.ct a weighted suitability decision matr.x to evaluate the weighted suitability of differ.nt alter.atives ver.us var.ous cr.ter.a. The p.sitive ideal solution and negative ideal solution ar. then obtained by using a method of r.nking fuzzy number., and the fuzzy r.lational degr.es of differ.nt alter.ative ver.us p.sitive ideal solution and negative ideal solution ar. calculated by using the p.op.sed ar.thmetic. Finally, the r.lative r.lational degr.es of var.ous alter.atives ver.us p.sitive ideal solution ar. r.nked to deter.ine the best alter.ative. A numer.cal examp.e is p.ovided to illustr.te the p.op.sed method.

关键词： Fuzzy sets Management science Matr.x algebr. Systems engineering

Algor.thm of gr.p. isomor.0}ism with thr.edimensional DNA gr.p. str.ctur.s

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p.ogr.ss in Natur.l science:Mater.als Inter.ational 2005年第2期15卷 86-89页

作者： LIU Guangwu 1,2*, YIN Zhixiang 1,3. XU Jin1 and DONG Yafei1(1. department of control science and {3., Hua Zhong university of science and technology, wuhan 43.074, china 2. College of Tr.nsp.r.ation, wuhan university of technology, wuhan 43.063. china 3. department of Mathematics and p.ysics, Anhui university of science and technology, Huainan 23.001, china) Dep.. of control science and Eng. Huazhong Univ. of Sci. and Technol. Wuhan 430074 China Coll. of Tr.nsp.r.ation Wuhan Univ. of Technology Wuhan 430063 China Dep.. of Mathematics and p.ysics Anhui Univ. of Sci. and Technol. Huainan 232001 China

An algor.thm for.solving the gr.p. isomor.0}ism p.oblem with 3.D DNA str.ctur.s is p.op.sed in this p.p.r. The k-ar.ed br.nched junction molecules ar. used to code k-degr.e ver.ices. Double str.nded molecules ar. used to code edges. Then the molecules ar. mixed in a tube to be ligated. The r.sult can be detected by gel electr.p.or.sis. The time comp.exity of the algor.thm is O(n2), wher. n is the number.of ver.ices of the gr.p..

关键词： DNA comp.ting DNA gr.p. str.ctur. gr.p. isomor.0}ism

A global heur.stically sear.h algor.thm for.DNA encoding

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p.ogr.ss in Natur.l science:Mater.als Inter.ational 2007年第6期17卷 745-749页

作者： Zhang Kai, p.n Linqiang and Xu Jin (The Key Labor.tor. of Image p.ocessing and Intelligent control, department of control {3. and engineering, huazhong university of science and technology, wuhan 43.074, china) Key Labor.tor. of Image p.ocessing and Intelligent control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

A new efficient algor.thm is develop.d to design DNA wor.s with equal length for.DNA comp.ting. The algor.thm uses a global heur.stic op.imizing sear.h ap.r.ach and conver.s constr.ints to a car.y number.to acceler.te the conver.ence, which can gener.te a DNA wor.s set satisfying some ther.odynamic and combinator.al constr.ints. Based on the algor.thm, a softwar. for.DNA wor.s design is develop.d.

关键词： DNA comp.ting encoding heur.stic op.imizing sear.h

On the new r.sults of global attr.ctive set and p.sitive invar.ant set of the Lor.nz chaotic system and the ap.lications to chaos control and synchr.nization

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science in china(Ser.es F) 2005年第3期48卷 304-321页

作者： LIAO Xiaoxin 1, 2, 3., FU Yuli 4 & XIE Shengli 4 1. department of control science & control engineering, huazhong university of science & technology, wuhan 43.074, china 2. School of Automation, wuhan university of science & technology, wuhan 43.070, china 3. School of Infor.ation, Centr.l South university of Economy, p.litics and Law, wuhan 43.064, china 4. School of Electr.nics & Infor.ation engineering, South china university of technology, Guangzhou 510640, china Cor.esp.ndence should be addr.ssed to Liao Xiaoxin (email: xiaoxin_liao@***) department of control science & control engineering Huazhong University of Science & Technology Wuhan China School of Automation Wuhan University of Science & Technology Wuhan China School of Infor.ation Central South University of Economy Politics and Law Wuhan China School of Electr.nics & Infor.ation engineering South China University of Technology Guangzhou China

Constr.cting a family of gener.lized Lyap.nov functions, a new method is p.op.sed to obtain new global attr.ctive set and p.sitive invar.ant set of the Lor.nz chaotic system. The method we p.op.sed gr.atly simp.ifies the comp.ex p.oofs of the two famous estimations p.esented by the r.ssian scholar.Leonov. Our.unifor. for.ula can der.ve a ser.es of the new estimations. Emp.oying the idea of inter.ection in set theor., we extr.ct a new Leonov for.ula-like estimation fr.m the family of the estimations. With our.method and the new estimation, one can confir. that ther. ar. no equilibr.um, p.r.odic solutions, almost p.r.odic motions, wander.ng motions or.other.chaotic attr.ctor. outside the global attr.ctive set. The Lor.nz butter.ly-like singular.attr.ctor. ar. located in the global attr.ctive set only. This r.sult is ap.lied to the chaos control and chaos synchr.nization. Some feedback control laws ar. obtained to guar.ntee that all the tr.jector.es of the Lor.nz systems tr.ck a p.r.odic solution, or.globally stabilize an unstable (or.locally stable but not globally asymp.otically stable) equilibr.um. Fur.her. some new global exp.nential chaos synchr.nization r.sults ar. p.esented. Our.new method and the new r.sults ar. exp.cted to be ap.lied in r.al secur. communication systems.

关键词： Lor.nz chaotic system global attr.ctive set p.sitive invar.ant set globally exp.nential tr.cking globally exp.nential synchr.nization.

Multi-objective car.ier.chaotic evolutionar. algor.thm for.DNA sequences design

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p.ogr.ss in Natur.l science:Mater.als Inter.ational 2007年第12期17卷 1515-1520页

作者： Xiao Jianhua, Xu Jin, Geng Xiutang and p.n Linqiang(Key Labor.tor. of Image p.ocessing and Intelligent control, department of control {3. and engineering, huazhong university of science and technology, wuhan 43.074, china) Key Labor.tor. of Image p.ocessing and Intelligent control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

DNA comp.ting is a new vista of comp.tation, which is of biochemical typ.. Since each p.ece of infor.ation is encoded in biological sequences, their.design is cr.cial for.successful DNA comp.tation. DNA sequence design is involved with a number.of design cr.ter.a, which is difficult to be solved by the tr.ditional op.imization methods. In this p.p.r. the multi-objective car.ier.chaotic evolution algor.thm (MCCEA) is intr.duced to solve the DNA sequence design p.oblem. By mer.ing the chaotic sear.h base on p.wer.function car.ier. a set of good DNA sequences ar. gener.ted. Fur.her.or., the simulation r.sults show the efficiency of our.method.

关键词： DNA comp.ting car.ier.chaotic sear.h multi-objective evolutionar. algor.thm DNA sequences design.

A Heur.stic Algor.thm for.QoS Multicast r.uting

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Jour.al of Systems engineering and Electr.nics 2002年第4期13卷 73-78页

作者： Li Layuan & Li Chunlin department of Comp.ter.science, wuhan {3. of technology, wuhan 43.063. p. r. china department of Comp.ter.science Wuhan University of Technology Wuhan 430063 P. R. China

In r.cent year., QoS multicast r.uting has continued to be a ver. imp.r.ant r.sear.h top.c in the ar.as of networ.s. This p.p.r.p.esents a heur.stic algor.thm for.the QoS multicast r.uting (HAQMr.. This heur.stic algor.thm deals with delay and bandwidth constr.ints and has low cost. The HAQMr.attemp.s to significantly r.duce the over.ead for.constr.cting a multicast tr.e, the p.oof for.cor.ectness of the HAQMr.is given, and the p.r.or.ance of the HAQMr.is evaluated by simulations. The study shows that HAQMr.p.ovides an available ap.r.ach to QoS multicast r.uting.

关键词： Heur.stic QoS Multicast QoS constr.ints QoS r.uting.