检索结果-南通市图书馆

Comp.r.son on neur.l networ.s and sup.or. vector.machines in sup.lier.' selection

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2008年第2期19卷 316-320页

作者： Hu Guosheng1,2.& Zhang Guohong3.1. School of Management, Guangdong Vocational {3.. of Science and Technology, Guangzhou 510640,{2. 2. School of Comp.ter.and infor.ation, Anqing Teacher.{3.., Anqing 2.6011,{2. 3. Adult Education {3.., Guangzhou univ., Guangzhou 510405,{2. [a]School of Management Guangdong Vocational Coll. of Science Technology Guangzhou 510640 P. R. China [b]School of Comp.ter infor.ation Anqing Teacher Coll. Anqing 246011 P. R. China [c]Adult Education coll. Guangzhou Univ. Guangzhou 510405 P. R. China

Sup.lier.＇ selection in sup.ly chain management （SCM） has attr.cted consider.ble r.sear.h inter.sts in r.cent year.. r.cent liter.tur.s show that neur.l networ.s achieve better.p.r.or.ance than tr.ditional statistical methods. However. neur.l networ.s have inher.nt dr.wbacks, such as local op.imization solution, lack gener.lization, and uncontr.lled conver.2}nce. A r.latively new machine lear.ing technique, sup.or. vector.machine （SVM）, which over.omes the dr.wbacks of neur.l networ.s, is intr.duced to p.ovide a model with better.exp.anator. p.wer.to select ideal sup.lier.p.r.ner.. Meanwhile, in p.actice, the sup.lier.＇ samp.es ar. ver. insufficient. SVMs ar. adap.ive to deal with small samp.es＇ tr.ining and testing. The p.ediction accur.cies for.Bp.N and SVM methods ar. comp.r.d to choose the ap.r.ciating sup.lier.. The actual examp.es illustr.te that SVM methods ar. sup.r.or.to Bp.N.

关键词： sup.lier.selection sup.ly chain management logistics sup.or. vector.machine Bp.N.

On p.Cover.Avoid and S-Quasinor.ally Embedded Subgr.up. in Finite Gr.up.

在线全文

学校读者我要写书评

暂无评论

Jour.al of Mathematical r.sear.h and Exp.sition 2010年第4期30卷 743-750页

作者： Xuan Li HE1,2. Yan Ming WANG3.1. Dep.r.ment of mathematics, Zhongshan univ.r.ity, Guangdong 5102.5,{2. 2. coll.ge of mathematics and infor.ation Science, guangxi univ.r.ity, guangxi 53.004,{2. 3. Lingnan coll.ge and Dep.r.ment of mathematics, Zhongshan univ.r.ity, Guangdong 5102.5,{2. Dep.r.ment of mathematics Zhongshan University Guangdong 510275 Lingnan coll.ge and Dep.r.ment of mathematics Zhongshan University Guangdong 510275

Let G be a finite gr.up. p.the smallest p.ime dividing the or.er.of G and p.a Sylow p.subgr.up.of G. If d is the smallest gener.tor.number.of p. then ther. exist maximal subgr.up. p., p.1}..., p. of p. denoted by Md（p. = {p.,...,p.}, such that di=1 p. = Φ（p., the Fr.ttini subgr.up.of p. In this p.p.r. we will show that if each member.of some fixed Md（p. is either.p.cover.avoid or.S-quasinor.ally embedded in G, then G is p.nilp.tent. As ap.lications, some fur.her.r.sults ar. obtained.

关键词： p.cover.avoid subgr.up S-quasinor.ally embedded subgr.up p.nilp.tent gr.up.

Intuitionistic fuzzy hier.r.hical cluster.ng algor.thms

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2009年第1期20卷 90-97页

作者： Xu Zeshui1,2.1. coll. of Economics and Management, Southeast {3.., Nanjing 2.0096,{2. 2. Inst. of Sciences, p.A {3.. of Science and Technology, Nanjing 2.0007,{2. coll. of Economics and Management Southeast Univ. Nanjing 210096 P. R. China Inst. of Sciences PLA Univ. of Science and Technology Nanjing 210007 P. R. China

Intuitionistic fuzzy set （IFS） is a set of 2.tup.e ar.uments, each of which is char.cter.zed by a member.hip.degr.e and a nonmember.hip.degr.e. The gener.lized for. of IFS is inter.al-valued intuitionistic fuzzy set （IVIFS）, whose comp.nents ar. inter.als r.ther.than exact number.. IFSs and IVIFSs have been found to be ver. useful to descr.be vagueness and uncer.ainty. However. it seems that little attention has been focused on the cluster.ng analysis of IFSs and IVIFSs. An intuitionistic fuzzy hier.r.hical algor.thm is intr.duced for.cluster.ng IFSs, which is based on the tr.ditional hier.r.hical cluster.ng p.ocedur., the intuitionistic fuzzy aggr.gation op.r.tor. and the basic distance measur.s between IFSs： the Hamming distance, nor.alized Hamming, weighted Hamming, the Euclidean distance, the nor.alized Euclidean distance, and the weighted Euclidean distance. Subsequently, the algor.thm is extended for.cluster.ng IVIFSs. Finally the algor.thm and its extended for. ar. ap.lied to the classifications of building mater.als and enter.1}ises r.sp.ctively.

关键词： intuitionistic fuzzy set inter.al-valued intuitionistic fuzzy set hier.r.hical cluster.ng intuitionisticfuzzy aggr.gation op.r.tor distance measur..

Op.imal guar.nteed cost contr.l for.fuzzy descr.p.or.systems with time-var.ing delay

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2008年第3期19卷 584-591页

作者： Tian Weihua1,2.& Zhang Huaguang3.1. School of infor.ation Science and Engineer.ng, Nor.heaster. univ., Shenyang 110004,{2. 2. Dep.. of Automatic Contr.l, Shenyang Inst. of Engineer.ng, Shenyang 11013.,{2. 3. School of infor.ation Science and Engineer.ng, Nor.heaster. univ., Shenyang 110004,{2.. (r.ceived December.2., 2.06) [a]School of infor.ation Science and Engineer.ng Nor.heaster. univ. Shenyang 110004 p. r. china [b]Dep.. of Automatic Contr.l Shenyang Inst. of Engineer.ng Shenyang 11013. p. r. china [c]School of infor.ation Science and Engineer.ng Nor.heaster. univ. Shenyang 110004 p. r. china

Based on the delay-indep.ndent r.le, the p.oblem of op.imal guar.nteed cost contr.l for.a class of Takagi-Sugeno （T-S） fuzzy descr.p.or.systems with time-var.ing delay is studied. A linear.quadr.tic cost function is consider.d as the p.r.or.ance index of the closed-loop.system. Sufficient conditions for.the existence of guar.nteed cost contr.ller. via state feedback ar. given in ter.s of linear.matr.x inequalities （LMIs）, and the design of an op.imal guar.nteed cost contr.ller.can be r.duced to a convex op.imization p.oblem. It is shown that the designed contr.ller.not only guar.ntees the asymp.otic stability of the closed-loop.fuzzy descr.p.or.delay system, but also p.ovides an op.imized up.er.bound of the guar.nteed cost. At last, a numer.cal examp.e is given to illustr.te the effectiveness of the p.op.sed method and the p.r.ect p.r.or.ance of the op.imal guar.nteed cost contr.ller.

关键词： fuzzy descr.p.or.systems op.imal guar.nteed cost contr.l time-var.ing delay linear.matr.x inequalities (LMIs).

New adap.ive quasi-sliding mode contr.l for.nonlinear.discr.te-time systems

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2008年第1期19卷 154-160页

作者： Wang Weihong1,2.& Hou Zhongsheng3.1. School of Tr.?c and Tr.nsp.r.ation, Beijing Jiaotong univ., Beijing 100044,{2. 2. Dep.. of Automation, Taiyuan univ. of Science & Technology, Taiyuan 03.02.,{2. 3. Advanced Contr.l Systems Lab, School of Electr.nics and infor.ation Engineer.ng, Beijing Jiaotong univ., Beijing 100044,{2. [a]School of Tr.ffic and Tr.nsp.r.ation Beijing Jiaotong Univ. Beijing 100044 P. R. China [b]Dep.. of Automation Taiyuan Univ. of Science & Technology Taiyuan 030024 P. R. China [c]Advanced Contr.l Systems Lab School of Electronics and Information Engineering Beijing Jiaotong Univ. Beijing 100044 P. R. China

A new adap.ive quasi-sliding mode contr.l algor.thm is develop.d for.a class of nonlinear.discr.te-time systems, which is esp.cially useful for.nonlinear.systems with vaguely known dynamics. This design is model-fr.e, and is based dir.ctly on p.eudo-p.r.ial-der.vatives der.ved on-line fr.m the inp.t and outp.t infor.ation of the system using an imp.oved r.cur.ive p.ojection typ. of identification algor.thm. The theor.tical analysis and simulation r.sults show that the adap.ive quasi-sliding mode contr.l system is stable and conver.3.nt.

关键词： quasi-sliding mode contr.l adap.ive contr.l model-fr.e contr.l p.eudo-p.r.ial-der.vative

Ce-and La-dop.d p.lymetallic layer.d double hydr.xides for.enhanced oxygen evolution r.action p.r.or.ance at high cur.ent density

在线全文

学校读者我要写书评

暂无评论

Science china Chemistr. 2024年第8期67卷 2586-2598页

作者： r.nel r.Kimaka p. p.ng Wang Miao He Senyao Meng Jiasai Yao Huawei Li Cheng Yang Zhenxing Li State Key Labor.tor. of Heavy Oil p.ocessing College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China

p.lymetallic layer.d double hydr.xides ar. p.omising cost-effective catalysts for.the oxygen evolution r.action(OEr. due to their.ver.atile anionic and cationic tunability. Never.heless, sever.l challenges p.r.ist, notably, issues r.lated to low electr.cal conductivity, p.or.catalytic activity, and stability, esp.cially at high cur.ent density. Her.in, we r.p.r. the design of Ce-and Ladop.d Co Ni Fe-layer.d double hydr.xide(Ce La Co Ni Fe-LDH) nanosheets thr.ugh a facile and scalable in situ self-assembly str.tegy that disp.ays enhanced OEr.activity. Exp.r.mental and theor.tical investigations p.ovide insights into the imp.ct of Ceand La-dop.ng by comp.r.ng Ce Co Ni Fe-LDH, La Co Ni Fe-LDH, and p.istine Co Ni Fe-LDH, all synthesized using the same methodology. These r.sults r.veal that dop.ng Ce^(3.)and La^(3.)into Co Ni Fe-LDH substantially imp.oves its electr.nic str.ctur.,r.sulting in enhanced conductivity, mor. oxygen vacancies(Vo), electr.n inter.ction, and active site for.ation. Consequently,significantly r.duced over.0}tentials of 175, 3.4, and 4{13. m V at 10, 100, and 500 m A cm^(-{13., r.sp.ctively, and a highly stable cur.ent density of 1{13. h in 1 M KOH wer. achieved. Notably, these p.r.or.ance metr.cs sur.0}ss those of unmodified LDHs and ar. comp.titive with many lanthanide-dop.d tr.nsition metal-based LDH electr.catalysts, as well as noble metal catalysts like r.thenium catalysts. This wor. r.p.esents a p.oneer.ng effor. in dop.ng Ce^(3.)and La^(3.)ions into a functional Co Ni Fe-based electr.catalyst, offer.ng insp.r.ng OEr.p.r.or.ance and scalability p.tential.

关键词： layer.d double hydr.xides oxygen evolution r.action lanthanide nanosheet high cur.ent density

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

在线全文

学校读者我要写书评

暂无评论

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 {2.. of Defense Technology, Changsha 410073.{3. 2. Unit 63.80, Luoyang 471003.{3. coll. of Electr.nic Science and Engineer.ng National Univ. of Defense Technology Changsha 410073 P.R. China Unit 63.80 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.l{2.al theor. and the nor. theor., the gr.y distance {3. ap.r.ach, which is based on the gr.y distance {3. quantity of a samp.e and the aver.ge gr.y distance {3. quantity of the samp.es, is p.op.sed in this ar.icle. The definitions of the gr.y distance {3. quantity of a samp.e and the aver.ge gr.y distance {3. 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. devi{2., 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 {3. 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.lic{2. 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.

Bionic Design and Finite Element Analysis of Elbow in Ice Tr.nsp.r.ation Cooling System

在线全文

学校读者我要写书评

暂无评论

Jour.al of Bionic Engineer.ng 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2., Xiuhua Sui~3. Linjing Xiao~3.1. Key Labor.tor. of Mine Hazar. p.evention and Contr.l (Ministr. of Education, china), Shandong {2. of Science and Technology, Qingdao 2.6510, p. r. china 2. School of Ar.hitectur., Tsinghua {2., Beijing 100084, p. r. china 3. coll.ge of Mechanical and Electr.nic Engineer.ng, Shandong {2. of Science and Technology, Qingdao 2.6510, p. r. china [a] Key Labor.tor. of Mine Hazar. p.evention Contr.l (Ministr. of Education China) Shandong University of Science Technology Qingdao 266510 P. R. China [b] School of Architecture Tsinghua University Beijing 100084 P. R. China [c] College of Mechanical Electr.nic Engineer.ng Shandong University of Science Technology Qingdao 266510 P. R. China

With the incr.ase in mining dep.h, mine heat har. has ap.ear.d to be mor. p.ominent. The mine heat har. could be r.solvedor.r.duced by ice r.fr.ger.4}. Thus, ice tr.nsp.r.ation thr.ugh p.p.line becomes a cr.tical p.oblem; typ.cally flowr.sistance occur. in the elbow. In the p.esent study, accor.ing to the analysis of the sur.ace mor.0}ology of fish scale, abiomimetic functional sur.ace str.ctur. for.the inter.or.wall of elbow is designed. Based on the theor. of liquid-solid two p.aseflow, a CFD numer.cal simulation of ice-water.mixtur. flowing thr.ugh the elbow is car.ied out using finite element *** exp.r.ments of p.essur. dr.p.and flow r.sistance for.both bionic and common elbows ar. conducted to test theeffect of the bionic elbow on flow r.sistance r.duction. It is found that with the incr.ase in the ice mass fr.ction in the ice-water.ixtur., the effect of bionic elbow on r.sistance r.duction becomes mor. obvious.

关键词： bionic elbow two p.ase flow ice tr.nsp.r.ation flow r.sistance r.duction p.essur. loss

Contour.r.p.esentation based on wedgelet

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2006年第2期17卷 251-257页

作者： Liu Zeyi~1, Sun Ziqiang~ 2.3., Xu Ling~2.& p.ng Xiang~ 4,5 1. Dep.. of mathematics of Science {3.., Shenzhen {2.., Shenzhen 518060, p.r. china 2. Dep.. of mathematics of Science {3.., Tianjin {2.., Tianjin 3.0072. p.r. Ch ina 3.Tianjin For.ign Studies {2.., Tianjin 3.02.4, p.r. china 4. Inst. of Op.oelectr.nics, Shenzhen {2.., Shenzhen 518060, p.r. china 5. National Lab of p.ecision Measur.ment Technology and Instr.mentation, Tianjin 3.0072. p.r. china Dep.. of mathematics of Science coll. Shenzhen Univ. Shenzhen 518060 P. R. China Dep.. of mathematics of Science coll. Tianjin Univ. Tianjin 300072 P. R. China Tianjin For.ign Studies univ. Tianjin 300204 P. R. China Inst. of Op.oelectr.nics Shenzhen Univ. Shenzhen 518060 P. R. China National Lab of p.ecision Measur.ment Technology and Instr.mentation Tianjin 300072 P. R. China

Aiming at the shor.comings of the existing wedgelet comp.ession ar.thmetics, a novel contour.r.p.esenting algor.thm based on wedgelets is p.esented in this p.p.r. Fir.tly the inp.t image is binar.zed and the most op.imized wedgelets ar. found by means of quadtr.e fr.mewor.. Then the contour. ar. r.constr.cted by ap.lying the wedgelets, the data volume is comp.essed, and the shor.comings of the contour.r.p.esentation based on nor.al wavelet ar. amelior.ted, the better.effect for.the visualization is obtained, too.

关键词： wedgelet binar.zation quadtr.e.