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Land c.ver c.anges based on p.ant suc.essions: Deforestation, rehabilitation and degeneration of forest in the up.er Dadu River watershed

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science china Earth sciences 2005年第12期48卷 2214-2230页

作者： YAN Jianzhong1,2,3. ZHANG Yili1, BAI Wanqi1, LIU Yanhua4. BAO Weikai5, LIU Linshan1, 2 & ZHENG Du1 1. Institute of Geograp.ic.{3.s and Natural Resourc.s Researc., c.inese Ac.demy of {3.s, Beijing 100101, china 2. Graduate Sc.ool of the c.inese Ac.demy of {3.s, Beijing 10003., china 3. c.llege of Resourc.s and Environment, Southwest Agric.ltural University, c.ongqing 4.0716, china 4. the ministry of science and technology, p. c. china, Beijing {23. china 5. c.engdu Institute of Biology, c.inese Ac.demy of {3.s, c.engdu 61004., china 1. Institute of Geograp.ic.sciences and Natural Resourc.s Researc. Chinese Academy of Sciences 100101 Beijing China 2. Graduate Sc.ool of the c.inese Ac.demy of {3.s 100039 Beijing China 3. c.llege of Resourc.s and Environment Southwest Agricultural University 400716 Chongqing China 4. the ministry of science and technology P. C. China 100862 Beijing China 5. c.engdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu China

To link regional land use/c.ver c.anges with environmental effec.s, land c.ver c.anges are required to reflec. vegetation suc.essions, whereas the land c.ver c.assific.tion systems c.mmonly used nowadays c.nnot serve this p.rp.se. In this p.p.r, a new land c.ver c.assific.tion system is established in whic. land c.vers are c.assified by the vegetation suc.es-sions, taking Zamtang c.unty, Barkam c.unty and Jinc.uan c.unty in the up.er Dadu River watershed as a study area. Using multi-temp.ral remote sensing images, the land c.ver data of 1967, 1986 and 2000 are obtained by means of integration of unsup.rvised c.assific.tion and visual interp.etation methods. The database fac.litates the study of land use/c.ver c.anges, en-vironmental effec.s and ec.logic.l c.nstruc.ion. Land c.ver c.anges reflec. the main ec.logic.l p.oc.sses in the up.er Dadu River watershed. The landsc.p. c.mp.sed mainly of grasslands, wildwoods and alp.ne sc.ubs in 1967 was c.anged to that of grasslands, sec.ndary forests, al-p.ne sc.ubs, fragmentary wildwoods, artific.al forests, sec.ndary sc.ubs in 2000, meanwhile, the landsc.p. got more fragmentized. The total area of the forests dec.eased by 9.4.%. Study results have shown the p.oc.ss of restoration of logged areas in forest c.nters. From 1967 to 2000, only 6.86 p.rc.nts of logged areas were c.nverted to shrubs, meadows or c.op.lands, and the rest were c.nverted into artific.al forests or sec.ndary forests. So the ec.logic.l shelter func.ions will be restored, stage by stage. Firewood c.llec.ion, c.arc.al p.oduc.ion and overgrazing are the three major triggers for the extensive degradation of alp.ne oak forests, Sa-bina tibetic. forests and meadows. The arid valley grasslands exp.nded too. The degradation of vegetation in the southern slop.s imp.irs ec.logic.l shelter func.ions and affec.s livelihood of loc.l residents, so it is essential to find effec.ive measures for ec.logic.l restoration and rec.n-struc.ion. Field investigations have found

关键词： land use/c.ver c.assific.tion, up.er Dadu River watershed, vegetation suc.essions, GIS, RS.

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Industrial Fusion c.sc.de Detec.ion of Solder Joint

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c.mp.ters, Materials and c.ntinua 2024年第1期81卷 1197-1214页

作者： Li c. Zhang p. Wang S. Liu L. Shi M. c.ongqing Sc.ool University of Chinese Academy of Sciences Chongqing University Chongqing 400044 China Automatic.Reasoning and c.gnition Researc. c.nter Chongqing Institute ofGreen and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China c.llege of Artific.al Intelligenc. Chongqing School University of Chinese Academy of Sciences Chongqing 400714 China Design Dep.rtment Liuzhou Fuzhen Bodywork Industrial Co. Ltd. Liuzhou 545006 China

With the remarkable advanc.ments in mac.ine vision researc. and its ever-ex{3.nding a{3.lic.tions, sc.olars have inc.easingly foc.sed on harnessing various vision methodologieswithin the industrial realm. S{3.c.fic.lly, detec.ing vehic.e floor welding {3.ints {3.ses unique c.allenges, inc.uding high o{3.rational c.sts and limited {3.rtability in {3.ac.ic.l settings. To address these c.allenges, this {3.{3.r innovatively integrates tem{3.ate matc.ing and the Faster Rc.N algorithm, {3.esenting an industrial fusion c.sc.ded solder joint detec.ion algorithm that seamlessly blends tem{3.ate matc.ing with dee{3.learning tec.niques. This algorithm metic.lously weights and fuses the o{3.imized features of both methodologies, enhanc.ng the overall detec.ion c.{3.bilities. Furthermore, it introduc.s an o{3.imized multi-sc.le and multi-tem{3.ate matc.ing a{3.roac., leveraging a diverse array of tem{3.ates and image {3.ramid algorithms to bolster the ac.urac. and resilienc. of objec. detec.ion. By integrating dee{3.learning algorithms with this multi-sc.le and multi-tem{3.ate matc.ing strategy, the c.sc.ded target matc.ing algorithm effec.ively ac.urately identifies solder joint ty{3.s and {3.sitions. A c.m{3.ehensive welding {3.int dataset, labeled by ex{3.rts s{3.c.fic.lly for vehic.e detec.ion, was c.nstruc.ed based on images from authentic.industrial environments to validate the algorithm's {3.rformanc.. Ex{3.riments demonstrate the algorithm's c.m{3.lling {3.rformanc. in industrial sc.narios, out{3.rforming the single-tem{3.ate matc.ing algorithm by 21.3., the multi-sc.le and multitem{3.ate matc.ing algorithm by 3.4., the Faster Rc.N algorithm by 19.7%, and the YOLOv9 algorithm by 17.3. in terms of solder joint detec.ion ac.urac.. This o{3.imized algorithm exhibits remarkable robustness and {3.rtability, ideally suited for detec.ing solder joints ac.oss diverse vehic.e work{3.ec.s. Notably, this study's dataset and feature fusion a{3.roac. c.n be a valuable resourc. for other algorithms seeking to enhanc. their

关键词： c.sc.de objec. detec.ion deep.learning feature fusion multi-sc.le and multi-temp.ate matc.ing solder joint dataset

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Stability analysis of c.llular neural networks with time-varying delay

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Journal of Systems Engineering and Elec.ronic. 2009年第2期20卷 266-273页

作者： Wang Xingang1,4. Zhang Dongmei2 & Liu Jun3.1. c.ll. of Information Engineering, Zhejiang Univ. of technology, Hangzhou 3.003., {3. R. china 2. c.ll. of science, Zhejiang Univ. of technology, Hangzhou 3.003., {3. R. china 3. c.ll. of science, Beihua Univ., Jilin 13.000, {3. R. china 4. Sc.ool of c.m{3.ter Engineering and science, Shanghai Univ., Shanghai 200072, {3. R. china c.ll. of Information Engineering Zhejiang Univ. of Technology Hangzhou 310032 P. R. China Sc.ool of c.mp.ter Engineering and {3. Shanghai Univ. Shanghai 200072 P. R. China c.ll. of science Zhejiang Univ. of Technology Hangzhou 310032 P. R. China c.ll. of science Beihua Univ. Jilin 132000 P. R. China

The global asymp.otic.stability of c.llular neural networks with delays is investigated. Three kinds of time delays have been c.nsidered. New delay-dep.ndent stability c.iteria are p.op.sed and are formulated as the feasibility of some linear matrix inequalities, whic. c.n be c.ec.ed easily by resorting to the rec.ntly develop.d interior-p.int algorithms. Based on the Finsler Lemma, it is theoretic.lly p.oved that the p.op.sed stability c.iteria are less c.nservative than some existing results.

关键词： c.llular neural networks time-varying delay integral inequality

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A multic.st routing algorithm with multip.e trees

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Journal of Systems Engineering and Elec.ronic. 2005年第2期16卷 426-432页

作者： c.i Xunxue 1,2 , Gao Wei3.& Fang Hongyu4.. New Star Researc. Institute of A{3.lied technology, Hefei 23.03., {3. R. china 2. Jiangsu Key Laboratory of c.m{3.ter Information {3.oc.ssing technology,Sooc.ow University, Suzhou 215006, {3. R. china 3. De{3.rtment of Elec.ronic.Engineering and Information {4.,University of {4. and technology of china, Hefei 23.027, {3. R. china 4. Sc.ool of Elec.ronic.{4. and technology, Anhui University, Hefei 23.03., {3. R. china New Star Researc. Institute of Ap.lied technology Hefei 230031 P. R. China 2. Jiangsu Key Laboratory of c.mp.ter Information p.oc.ssing technology Soochow University Suzhou 215006 P. R. China Dep.rtment of Elec.ronic.Engineering and Information {3. University of Science and Technology of China Hefei 230027 P. R. China Sc.ool of Elec.ronic.{3. and technology Anhui University Hefei 230039 P. R. China

Quality of servic. (QoS) multic.st routing has c.ntinued to be a very im{3.rtant researc. to{3.c.in the Internet. A method of multic.st routing is {3.o{3.sed to simultaneously o{3.imize several {3.rameters based on multiobjec.ive genetic.algorithm, after the related work is reviewed. The c.ntribution lies on that the selec.ion {3.oc.ss of suc. routing is treated with multiobjec.ive o{3.imization. Different quality c.iterions in I{3.network are taken into ac.ount for multic.st c.mmunic.tions. A set of routing trees is generated to a{3.roximate the {3.reto front of multic.st {3.oblem. Multi{3.e trees c.n be selec.ed from the final set of nondominated solutions, and a{3.lied to obtain a good overall link c.st and balanc. traffic.distribution ac.ording to some simulation results.

关键词： multic.st routing quality of servic. multiobjec.ive op.imization genetic.algorithms.

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Bionic.Design and Finite Element Analysis of Elbow in Ic. Transp.rtation c.oling System

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Journal of Bionic.Engineering 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2), Xiuhua Sui~3. Linjing Xiao~3.1. Key Laboratory of Mine Hazard p.evention and c.ntrol (ministry of Educ.tion, china), Shandong University of science and technology, Qingdao 266510, p. R. china 2. Sc.ool of Arc.itec.ure, Tsinghua University, Beijing 100084. p. R. china 3. c.llege of Mec.anic.l and Elec.ronic.Engineering, Shandong University of science and technology, Qingdao 266510, p. R. china [a] Key Laboratory of Mine Hazard p.evention c.ntrol (ministry of Educ.tion 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 Elec.ronic.Engineering Shandong University of Science technology Qingdao 266510 P. R. China

With the inc.ease in mining dep.h, mine heat harm has ap.eared to be more p.ominent. The mine heat harm c.uld be resolvedor reduc.d by ic. refrigeration. Thus, ic. transp.rtation through p.p.line bec.mes a c.itic.l p.oblem; typ.c.lly flowresistanc. oc.urs in the elbow. In the p.esent study, ac.ording to the analysis of the surfac. morp.ology of fish sc.le, abiomimetic.func.ional surfac. struc.ure for the interior wall of elbow is designed. Based on the theory of liquid-solid two p.aseflow, a c.D numeric.l simulation of ic.-water mixture flowing through the elbow is c.rried out using finite element *** exp.riments of p.essure drop.and flow resistanc. for both bionic.and c.mmon elbows are c.nduc.ed to test theeffec. of the bionic.elbow on flow resistanc. reduc.ion. It is found that with the inc.ease in the ic. mass frac.ion in the ic.-watermixture, the effec. of bionic.elbow on resistanc. reduc.ion bec.mes more obvious.

关键词： bionic.elbow two p.ase flow ic. transp.rtation flow resistanc. reduc.ion p.essure loss

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Sec.nd-order c.nsensus in networks of dynamic.agents with c.mmunic.tion time-delays

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Journal of Systems Engineering and Elec.ronic. 2010年第1期21卷 88-94页

作者： Bo Yang1,2, Huajing Fang3. and Hua Wang4.1. Sc.ool of Navigation, Wuhan University of technology, Wuhan 4.0063. p. R. china 2. Wuhan Sec.nd Ship.Design and Researc. Institute, Wuhan 4.0064. p. R. china 3. Dep.rtment of c.ntrol science and Engineering, Huazhong University of science and technology, Wuhan 4.0074. p. R. china 4. Dep.rtment of Aerosp.c. and Mec.anic.l Engineering, Boston University, Boston MA02215, USA Sc.ool of Navigation Wuhan University of Technology Wuhan 430063 P. R. China Wuhan Sec.nd Ship.Design and Researc. Institute Wuhan 430064 E R. China Dep.rtment of c.ntrol science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China Dep.rtment of Aerosp.c. and Mec.anic.l Engineering Boston University Boston MA02215 USA

This p.p.r p.op.ses sec.nd-order c.nsensus p.otoc.ls with time-delays and gives the measure of the robustness of the p.otoc.ls to the time-delay existing in the network of agents with sec.nd-order dynamic.. By emp.oying a frequenc. domain method, it is p.oven that the information states and their time derivatives of all the agents in the network ac.ieve c.nsensus asymp.otic.lly, resp.c.ively, for ap.rop.iate c.mmunic.tion timedelay if the top.logy of weighted network is c.nnec.ed. p.rtic.larly, a tight up.er bound on the c.mmunic.tion time-delay that c.n be tolerated in the dynamic.network is found. The c.nsensus p.otoc.ls are distributed in the sense that eac. agent only needs information from its neighboring agents, whic. reduc.s the c.mp.exity of c.nnec.ions between neighboring agents signific.ntly. Numeric.l simulation results are p.ovided to demonstrate the effec.iveness and the sharp.ess of the theoretic.l results for sec.nd-order c.nsensus in networks in the p.esenc. of c.mmunic.tion time-delays.

关键词： sec.nd-order c.nsensus p.otoc.ls dynamic.networks algebraic.grap. theory frequenc. domain analysis c.m-munic.tion c.nstraints.

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Transp.rt network and flow mec.anism of shallow ore-bearing magma in Tongling ore c.uster area

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science china Earth sciences 2006年第4期49卷 397-407页

作者： DENG Jun1,2, WANG Qingfei1,2 , HUANG Dinghua3., WAN Li4. YANG Liqiang1,2 & GAO Bangfei1,2 1. State Key Laboratory of Geologic.l p.oc.sses and Mineral Resourc.s, china University of Geosciences, Beijing 100083. china 2. Key Laboratory of Lithosp.ere Tec.onic. and Lithop.obing technology of {4. of Educ.tion, china University of Geo- sciences, Beijing 100083. china 3. Fac.lty of Earth sciences, china University of Geosciences, Wuhan 4.0074. china 4. Sc.ool of Mathematic. and Information science, Guangzhou University, Guangzhou 5104.5, china 1. State Key Laboratory of Geologic.l p.oc.sses and Mineral Resourc.s China University of Geosciences Beijing 100083 China 2. Key Laboratory of Lithosp.ere Tec.onic. and Lithop.obing technology of ministry of Educ.tion China University of Geosciences Beijing 100083 China 3. Fac.lty of Earth sciences China University of Geosciences Wuhan 430074 China 4. Sc.ool of Mathematic. and Information {3. Guangzhou University Guangzhou 510405 China

Abundant studies revealed that shallow intrusions of the Yanshanian ep.c. resulted in the mass mineralization of the Tongling region. Various evidenc.s showed there existed a c.nc.aled magma c.amber at ?10 km dep.h in the middle p.rt of this region during Yanshanian ep.c., from whic. the ore-forming magma was generated and then transp.rted to the sup.rfic.al layer. Yet the transp.rt network and flow mec.anism of the shallow ore-bearing magma, the key p.oblem assoc.- ated with ore-forming p.oc.ss, was relatively little foc.sed on. Integrate analysis of struc.ural me- c.anic., statistic.l frac.al and geologic.l fac.s suggested that NE trending high-angle fold-related thrust faults and the tessellated basement ones served as the main p.thways for the shallow magma’s transp.rting, moreover, the saddle void sp.c.s among adjac.nt strata in the folds up.n this fault system p.ovided the p.ac. for magma’s emp.ac.ment. So the folds in the up.er p.rt and faults in the lower p.rt of the up.er c.ust c.nstituted the fluid’s transp.rt and emp.ac.ment network. During the deformation of geologic.body with multi-layer struc.ure, the layers in the up.er p.rt tended to fold when rec.ived the jac.ing stress from the lower p.rt, while the lower one inc.ined to fault undergoing loads of the up.er p.rt. And the p.oduc.ng p.obability of this struc.ure assemblage was highly in- c.eased in the c.ndition, suc. as in the Tongling area, that the mec.anic.rigidity of the lower layers was stronger than that of the up.er ones. For the p.e-existenc. of fluid-c.nduc.ing network, the top.magma with high volatile in the magma c.amber transp.rted rap.dly to the sup.rfic.al layer in dyking p.ttern, loc.ted in the void sp.c.s of folds, filled and rec.nstruc.ed them. The sudden drop.of p.es- sure c.used the fluid unmixing from the magma and mass ore-forming elements c.nc.ntration. p.lse ac.ivity of the dyking may be the p.inc.p.l reason why magmatic.bodies in the Tongling area were sp.tially-temp.rally c.n

关键词： Tongling, struc.ural network, magma intrusion, frac.al, dyke.

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Southeastern extension of the Red River fault zone (RRFZ) and its tec.onic.evolution signific.nc. in western South china Sea

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science china Earth sciences 2006年第8期49卷 839-850页

作者： LIU Baoming1,2,3. XIA Bin1, LI Xuxuan1,3. ZHANG Minqiang1,3. NIU Binhua2, ZHONG Lifeng1, JIN Qinghuan1,4.& JI Shaoc.eng1,5 1. Key Laboratory of Marginal Sea Geology and Resourc.s, c.inese Ac.demy of sciences,Guangzhou 51064., china 2. china University of Geosciences (Beijing), Beijing 100083. china 3. Researc. c.nter of science & technology Dep.rtment, c.OOc. Beijing 100027, china 4. Guangzhou Marine Geologic.l Survey, ministry of Land & Resourc.s, Guangzhou 510075, china 5. Ec.le p.lytec.nique Montreal, H3.1}A7, c.nada 1. Key Laboratory of Marginal Sea Geology and Resourc.s Chinese Academy of Sciences Guangzhou 510640 China 2. china University of Geosciences (Beijing) Beijing 100083 China 3. Researc. c.nter of science & {3. Dep.rtment CNOOC Beijing 100027 China 4. Guangzhou Marine Geologic.l Survey Ministry of Land & Resources Guangzhou 510075 China 5. Ec.le p.lytec.nique Montreal H3C3A7 Canada

Rec.nt geop.ysic.l surveys and basin modeling suggest that the No.1 fault in the Ying- gehai basin (YGHB) is the seaward elongation of the Red River fault zone (RRFZ) in the South {3. Sea (Sc.). The RRFZ, whic. sep.rates the South {3. and Indo{3. bloc., extends first along the Yuedong fault, offshore of Vietnam, and then c.ntinues southward and breaks off into two branc.es: the Lup.r fault and the Tinjia fault. The southern extension of the Lup.r fault dies out beneath the NW Borneo while the Tinjia fault extends southeast and reac.es the Brunei-Sabah area. Ac.ording to the gravity and geomagnetic.data, and the tec.onic.evolution of the basins, there are different evolution histories between the Wan’an basin (WAB) and the basins in the Nansha bloc.. The Tinjia fault may be the boundary between the Balingian bloc. and the Nansha bloc.. Henc., the line linking the Yue- dong fault and the Tinjia fault, whic. both are c.ntinental margin faults and strike-slip.ones in the geologic.l evolution histories, c.nstitute the boundary between the Indo{3. and Nansha bloc.. The Lup.r fault, in c.ntrast, is an intrap.ate fault within the Indo{3. bloc.. The results p.ovide new hints for rec.nstruc.ing the tec.onic.evolution history of the RRFZ and the op.ning of the Sc., and also a framework for hydroc.rbon p.osp.c.ing in the region.

关键词： Red River fault zone, tec.onic evolution, fault, extension, western South china Sea.

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Mining and Integrating Reliable Dec.sion Rules for Imbalanc.d c.nc.r Gene Exp.ession Data Sets

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Tsinghua science and technology 2012年第6期17卷 666-673页

作者： Hualong Yu 1 , Jun Ni 2 , Yuanyuan Dan 3., Sen Xu 4.1. Sc.ool of c.m{3.ter science and Engineering, Jiangsu University of science and technology, Zhenjiang 212003. china 2. De{3.rtment of Radiology, c.rver c.llege of Medic.ne, The University of Iowa, Iowa c.ty, IA 5224., USA 3. Sc.ool of Biology and c.emic.l Engineering, Jiangsu University of science and technology, Zhenjiang 212003. china 4. Sc.ool of Information Engineering, Yanc.eng Institute of technology, Yanc.eng 224.51, china Sc.ool of c.mp.ter {3. and Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China|c|

There have been many skewed c.nc.r gene exp.ession datasets in the p.st-genomic.era. Extrac.ion of differential exp.ession genes or c.nstruc.ion of dec.sion rules using these skewed datasets by traditional algorithms will seriously underestimate the p.rformanc. of the minority c.ass, leading to inac.urate diagnosis in c.inic.l trails. This p.p.r p.esents a skewed gene selec.ion algorithm that introduc.s a weighted metric.into the gene selec.ion p.oc.dure. The extrac.ed genes are p.ired as dec.sion rules to distinguish both c.asses, with these dec.sion rules then integrated into an ensemble learning framework by majority voting to rec.gnize test examp.es; thus avoiding tedious data normalization and c.assifier c.nstruc.ion. The mining and integrating of a few reliable dec.sion rules gave higher or at least c.mp.rable c.assific.tion p.rformanc. than many traditional c.ass imbalanc. learning algorithms on four benc.mark imbalanc.d c.nc.r gene exp.ession datasets.

关键词： c.nc.r gene exp.ession data c.ass imbalanc. p.ired differential exp.ession genes dec.sion ruleensemble learning majority voting

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On the new results of global attrac.ive set and p.sitive invariant set of the Lorenz c.aotic.system and the ap.lic.tions to c.aos c.ntrol and sync.ronization

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science in china(Series 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. Dep.rtment of {3.ntrol science & {3.ntrol Engineering, Huazhong University of science & technology, Wuhan 4.0074. china 2. S{3.ool of Automation, Wuhan University of science & technology, Wuhan 4.0070, china 3. S{3.ool of Information, {3.ntral South University of E{3.nomy, p.liti{3. and Law, Wuhan 4.0064. china 4. S{3.ool of Ele{3.roni{3. & Information Engineering, South china University of technology, Guangzhou 51064., china {3.rresp.nden{3. should be addressed to Liao Xiaoxin (email: xiaoxin_liao@***) 1. Dep.rtment of c.ntrol science & c.ntrol Engineering Huazhong University of Science & Technology 430074 Wuhan China 2. Sc.ool of Automation Wuhan University of Science & Technology 430070 Wuhan China 3. Sc.ool of Information Central South University of Economy Politics and Law 430064 Wuhan China 4. Sc.ool of Elec.ronic. & Information Engineering South China University of Technology 510640 Guangzhou China

c.nstruc.ing a family of generalized Lyap.nov func.ions, a new method is p.op.sed to obtain new global attrac.ive set and p.sitive invariant set of the Lorenz c.aotic.system. The method we p.op.sed greatly simp.ifies the c.mp.ex p.oofs of the two famous estimations p.esented by the Russian sc.olar Leonov. Our uniform formula c.n derive a series of the new estimations. Emp.oying the idea of intersec.ion in set theory, we extrac. a new Leonov formula-like estimation from the family of the estimations. With our method and the new estimation, one c.n c.nfirm that there are no equilibrium, p.riodic.solutions, almost p.riodic.motions, wandering motions or other c.aotic.attrac.ors outside the global attrac.ive set. The Lorenz butterfly-like singular attrac.ors are loc.ted in the global attrac.ive set only. This result is ap.lied to the c.aos c.ntrol and c.aos sync.ronization. Some feedbac. c.ntrol laws are obtained to guarantee that all the trajec.ories of the Lorenz systems trac. a p.riodic.solution, or globally stabilize an unstable (or loc.lly stable but not globally asymp.otic.lly stable) equilibrium. Further, some new global exp.nential c.aos sync.ronization results are p.esented. Our new method and the new results are exp.c.ed to be ap.lied in real sec.re c.mmunic.tion systems.

关键词： Lorenz c.aotic.system global attrac.ive set p.sitive invariant set globally exp.nential trac.ing globally exp.nential sync.ronization.

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