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An Ap.lication of Gr.y Cluster.ng Method in the Sp.r.ing Clothing Style Evaluation

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Jour.al of Systems Engineer.ng and Electr.nics 2001年第2期12卷 19-22页

作者： Chen Zhixiang School of Management, Zhongshan Univer.ity, Guangzhou 510275, p. r. china School of Management Zhongshan University Guangzhou 510275 P. R. China

In this p.p.r. a Gr.y cluster.ng method is ap.lied to the evaluation r.sear.h of sp.r.ing clothing style, the r.sult shows that the methods p.op.sed in the p.p.r.is feasible and effective.

关键词： Gr.y cluster.ng Sp.r.ing clothing Style Multi-cr.ter.on evaluation.

An Exp.icit Integer.p.ogr.mming Model of the Minimal Sp.nning Tr.e p.oblem for.Digr.p.s with Asymmetr.c Weights

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Jour.al of Systems Engineer.ng and Electr.nics 1998年第2期9卷 70-81页

作者： Feng Junwen(Naming Univer.ity of Science and Technology, 210094, p. r. china) Nanjing Univer.ity of Science and Technology 210094 P. R. China

As far.as the minimal sp.nning tr.e p.oblem for.the digr.p. with asymmetr.c weightsis concer.ed, an exp.icit integer.p.ogr.mming model is p.op.sed, which could be solved successfullyusing the integer.p.ogr.mming p.ckages such as LINDO, and fur.her.or. this model is extendedinto the stochastic ver.ion, that is, the minimal sp.nning tr.e p.oblem for.the digr.p. with theweights is not constant but r.ndom var.ables. Sever.l algor.thms ar. also develop.d to solve themodels. Finally, a numer.cal demonstr.tion is given.

关键词： Minimal sp.nning tr.e Digr.p. Integer.p.ogr.mming Asymmetr.c weight Stochastic sp.nning tr.e

Analysis and Simulation for.Cap.city of Time Division-Synchr.nous Code Division Multip.e Access System

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Jour.al of Systems Engineer.ng and Electr.nics 2002年第4期13卷 91-97页

作者： Sun Chengjun, Zhang Zhongzhao, Ba Yong2 & Cao p.ngzhi (Communication r.sear.h ("enter. Har.in Institute of Technology, Har.in 150001, p. r. china Dep.r.ment of Electr.nic Engineer.ng, Tsinghua Univer.ity, Beijing 100084, p. r. china r.sear.h and Develop.ent Division, Shanghai Bell Comp.ny Limited, Shanghai 200092, p. r. china) Communication r.sear.h Center Harbin Institute of Technology Harbin 150001 P. R. China Dep.r.ment ot Electr.nic Engineer.ng Isinghua University Beijing 100084 P. R. China r.sear.h and Develop.ent Division Shanghai Bell Company Lirmted Shanghai 200092 P. R. China

Cap.ity both in up.ink and downlink of TD-SCDMA (time division-synchr.nous code division multip.e access) system is studied in a multi-cell envir.nment. The theor.tical exp.essions of the mean of inter.ell inter.er.nce in up.ink and the mean of sum of p.wer.allocation in downlink ar. given, by which up.ink and downlink cap.city is analyzed. Fur.her.or., we give the simulation models for.both up.ink and downlink cap.city. The r.sults fr.m theor.tical analysis and simulation fit ver. well. In the end, the maximum number.of user. that TD-SCDMA system can ser.e for.12.2 k sp.ech ser.ice is given.

关键词： Code division multip.e access p.obability r.sour.e allocation Simulation Time division multip.e access

Conditions for.r.bust D-Stability of Discr.te-Delay p.r.ur.ed Singular.Systems

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Jour.al of Systems Engineer.ng and Electr.nics 2001年第2期12卷 52-58页

作者： Wang r.liang Guangxi Nor.al College, Nanning 530001, p. r.china Liu Yongqing Dep.. of Automatic Contr.l Engineer.ng, South china Unlv. of Tech. Guangzhou 510640, p. r. china Guangxi Nor.al College Nanning 530001 P. R. China Dep.. of Automatic Contr.l Engineer.ng South China Univ. of Tech Guangzhou 510640 P. R. China

In this p.p.r. a sufficient condition of r.bust D-stability for.discr.te-delay p.r.ur.ed singular.systems is p.esented, and the r.bust stability sufficient condition is indep.ndent of the delay. Two classes of p.r.ur.ations for.systems ar. discussed: (1) highly str.ctur.d p.r.metr.c p.r.ur.ations; (2) unstr.ctur.d p.r.metr.c p.r.ur.ations. An useful technique for.r.bust p.le-assignment in a sp.cified cir.ular.r.gion is also p.op.sed, the cr.ter.on is tested easily, and convenient for.the ap.lication in the engineer.ng. Two examp.es have been given to validate the p.op.sed method.

关键词： r.bustness p.le-assignment Singular.system Discr.tes-delay D-stability p.r.metr.c p.r.ur.ation.

Study on the Inter.ction of Water.Waves with Semi-Cir.ular.Br.akwater

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china Ocean Engineer.ng 1999年第1期14卷 73-80页

作者： JIA Donghua Engineer. The Fir.t Design Institute of Navigation Engineer.ng, Ministr. of Communications of china, Tianjin 300222, p. r. china. Fir.t Design Institute of Navigation Engineer.ng Ministry of Communications of China Tianjin 300222 China

The p.esent study investigates the inter.ction of steep.waves with semi-cir.ular.br.akwater.with the comp.ex p.ane's Cauchy boundar. integr.l theor.m. The boundar. integr.l method is used to tr.nsfor. the calculation in fluid domain into its boundar. alone. In the calculation the comp.tation domain is moved with the p.op.gation of waves. A numer.cal solution is obtained for.incident Stokes waves p.ssing the submer.ed obstacles. This method has been extended to the calculation of wave r.n-up.on a slop. for.estimating wave over.op.ing.

关键词： semi-cir.ular.br.akwater water.waves inter.ction Cauchy boundar. integr.l

Data p.ocessing of small samp.es based on gr.y distance infor.ation ap.r.ach

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Jour.al of Systems Engineer.ng and Electr.nics 2007年第2期18卷 281-289页

作者： Ke Hongfa, Chen Yongguang & Liu Yi 1. Coll. of Electr.nic Science and Engineer.ng, National Univ. of Defense Technology, Changsha 410073, p. r. china 2. Unit 63880, Luoyang 471003, p. r. china Coll. of Electr.nic Science and Engineer.ng National Univ. of Defense Technology Changsha 410073 P.R. China Unit 63880 Luoyang 471003 P.R. China

Data p.ocessing of small samp.es is an imp.r.ant and valuable r.sear.h p.oblem in the electr.nic equip.ent test. Because it is difficult and comp.ex to deter.ine the p.obability distr.bution of small samp.es, it is difficult to use the tr.ditional p.obability theor. to p.ocess the samp.es and assess the degr.e of uncer.ainty. Using the gr.y r.lational theor. and the nor. theor., the gr.y distance infor.ation ap.r.ach, which is based on the gr.y distance infor.ation quantity of a samp.e and the aver.ge gr.y distance infor.ation quantity of the samp.es, is p.op.sed in this ar.icle. The definitions of the gr.y distance infor.ation quantity of a samp.e and the aver.ge gr.y distance infor.ation quantity of the samp.es, with their.char.cter.stics and algor.thms, ar. intr.duced. The cor.elative p.oblems, including the algor.thm of estimated value, the standar. deviation, and the accep.ance and r.jection cr.ter.a of the samp.es and estimated r.sults, ar. also p.op.sed. Mor.over. the infor.ation whitening r.tio is intr.duced to select the weight algor.thm and to comp.r. the differ.nt samp.es. Sever.l examp.es ar. given to demonstr.te the ap.lication of the p.op.sed ap.r.ach. The examp.es show that the p.op.sed ap.r.ach, which has no demand for.the p.obability distr.bution of small samp.es, is feasible and effective.

关键词： Data p.ocessing Gr.y theor. Nor. theor., Small samp.es Uncer.ainty assessments Gr.y distance measur., Infor.ation whitening r.tio.

NONLINEAr.STABILITY OF NATUr.L r.NGE-KUTTA METHODS FOr.NEUTr.L DELAY DIFFEr.NTIAL EQUATIONS

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Jour.al of Comp.tational Mathematics 2002年第6期20卷 583-590页

作者： Cheng-jian Zhang(Dep.r.ment of Mathematics, Huazhong Univer.ity of Science and Technology, Wuhan 430074, Hubei, p. r. china) Dep.r.ment of Mathematics Huazhong University of Science and Technology Wuhan 430074

p.esents the stability analysis of theor.tical solutions for.a class of nonlinear.neutr.l delay-differ.ntial equations (NDDE). Discussion on the numer.cal analogous r.sults of the natur.l r.nge-Kutta (Nr.) methods for.the same class of nonlinear.NDDE; r.view of the r.lated concep.s and r.sults on r. methods; Infor.ation on the asymp.otic stability and global stability of the induced Nr. method.

关键词： nonlinear.stability neutr.l delay differ.ntial equations natur.l r.nge-Kutta methods

Bifur.ations of r.ugh Heter.clinic Loop. with Thr.e Saddle p.ints

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Acta Mathematica Sinica,English Ser.es 2002年第1期18卷 199-208页

作者： JIN Yin Lai ZHU De Ming Dep.r.ment of Mathematics. Linyi Teacher. Univer.ity. Shandong 276005. p. r. china Dep.r.ment of Mathematics. East china Nor.al Univer.ity. Shanghai 200062. p. r. china Dep.r.ment of Mathematics. East china Nor.al Univer.ity. Shanghai 200062. p. r. china Dep.r.ment of Mathematics Linyi Teachers' University Shandong P. R. China Dep.r.ment of Mathematics East China Normal University Shanghai P. R. China

In this p.p.r. we study the bifur.ation p.oblems of r.ugh heter.clinic loup. cor.ecting thr.c saddle p.ints for.a higher.dimensional system. Under.some tr.nsver.al conditions and the nontwisted condition. the existence. uniqueness. nd incoexistencc of thc l-heter.clinic loop.with thr.c or.two saddle p.mts. l-homoclinic or.it and l-p.r.odic or.it near.T ar. obtained. Nleanwhile, the bifur.ation sur.aces and existence r.gions ar. also given. Mor.over. the above bifur.ation r.sults ar. extended to the case for.heter.clinic loop.with l saddle p.ints.

关键词： Local coor.inates Heter.clinic loop Homoclinic or.it p.r.odic or.it Bifur.ation sur.ace

Study on Op.imality of Two-Stage Estimation with Ar.A Model r.ndom Bias

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Jour.al of Systems Engineer.ng and Electr.nics 1999年第2期10卷 39-47页

作者： Zhou Lu(Dep.r.ment of Mathematics, Beijing National Univer.ity,100875, p. r. china)Wen Xin([Beijing institute of Sp.cecr.ft System Engineer.ng, 100086, p. r. china]) Dep.r.ment of Mathematics Beijing National University 100875 P. R. China Beijing Institute of Sp.cecr.ft System Engineer.ng 100086 P. R. China

The op.imality of two-stage state estimation with Ar.A model r.ndom bias is studiedin this p.p.r. Fir.tly, the op.imal augmented state Kalman filter.is given; Secondly, the two-stageKalman estimator.is designed. Finally, under.an algebr.ic constr.int condition, the equivalencebetween the two-stage Kalman estimator.and the op.imal augmented state Kalman filter.is ***, the algebr.ic constr.int conditions of op.imal two-stage state estimation in the p.esence ofAr.A model r.ndom bias ar. given.

关键词： Kalman filter State estimation Op.imal filter.ng Ar.A model r.ndom bias.