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1.
IntroductionDecentralizedcontroltheoryalreadyexistsforlarge_scalesystems[1,2 ].ThereaftertheH∞robustcontroltheorywasappliedtosolvedisturbanceattenuationandreliablecontrolproblemsofsuchsystems[3~5 ]sothatfindingthecriticaloptimalparameterγ- 2crisanessentialstep ,hereγcristheoptimalH∞normofthesystem .ZhongandZhong[6 ]showedthattheLinear_Quadratic (LQ)optimalcontrolandKalman_Bucyfilteringtheoryareanalogoustostaticsinstructuralmechanics.Zhongetal.alsoshowed[7~ 9]thattheproblemofdetermini… 相似文献
2.
钟万勰 《应用数学和力学(英文版)》2000,(12)
IntroductionH∞controltheoryhasbeenwelldevelopedsincetheDGKFpaper[1],wherethefundamentalequationsforH∞ measurementfeedbackcontrolarederivedfromtheseparationprinciple ,asinLQGcontroltheory[2~ 5 ].However,thecomputationforfinitehorizon [0 ,tf]problemandthedetermi… 相似文献
3.
刘传汉 《应用数学和力学(英文版)》1997,18(10):987-995
I.IntroductionForaclassofhoundaryvalueproblemsofdifferentia1equation,whichiswidelyappIiedinmechanicswhereeC(O,eo),e,<<1,isasmalIperturbationparameter-andf(x),a(x)satisfytheNumericaltreatmentofproblem(l.l)wasgivenin[lO].[l2].In[lO].auniform1yconvergentdiff… 相似文献
4.
IntroductionSince 1 963 ,Lorenzfoundthefirstchaoticattractorinathree_dimensionalautonomoussystem[1],chaoshasbeenintensivelystudiedduringthelastdecades.Ithasbeendetectedinalargenumberofdynamicssystemofphysicalnature.However,manyeffectsareusuallyundesirableinpracticeforthesensibilityofchaos.Controllingchaoticsystemhasbeeninthefocusofattentionintheengineeringsociety[2~ 4 ].Manytechniquesandapproacheshavebeenstudiedtocontrolthechaoticsystem .Forinstance,OGYmethod[5 ],linearstatespacefeedback[6… 相似文献
5.
IntroductionIthasbeenratheralonghistorythattheBoundaryElementMethod (BEM )isappliedtosolvetheplaneelasticityproblems[1~2 ].However,theEBIE ,whichisequivalenttotheoriginalboundaryvalueproblem ,hasnotbeenfullyappreciatedandsolvedinBEMcommunity .TheconventionalboundaryintegralequationswithindirectvariablesarediscussedthoroughlyanditisshownthatthepreviousresultsarenotEBIE ,i.e .,sometimes,thereexistsnosolutionormorethanonesolutiontothem .Themainkeyliesintheexactformoftheexteriorproblems.I… 相似文献
6.
奚致中 《应用数学和力学(英文版)》1995,16(6):557-564
Sincethecycloneisextensivelyusedinindustry,themechanismofitsstreamhasbeeninvestigatedandanalysed.Buttheprocessofthepreviousdiscussionstaysattheleveloftwo-dimensionedmodelanalysis,withtheaddedconsiderationabouttheaxialIysymmetry.lntheseyears,somespecialistshavediscusseditinthelightofthetotalthree-dimensionview.Thispapertriestogivesystematicanddetai]edexp1anationsandtopresentacorrectresultofRef[1].I.GeneralEquationEstablishedFirstweestablishmathematicalexpressionofflowinthecyclone.Wecanimaget… 相似文献
7.
高岩 《应用数学和力学(英文版)》1998,(12)
I.IntroductionResearches'illnoncollft,rnlingfiniteelementmethodsalldtheircollvergellcepropertyabout.theplaneandthreedinlensiollalproblemshavebeenextrelllelyperltct.Sc\)eralmethodsofdesigningconvergelltbonconfol-"lingelementsbavebeenestablished,seeforinstance[1,2].Howerver,axisyllln7etricnonconformingnZethodsandtheirconvergcncearerescarclledulltilqtliterecently.b1viewofthelhctthataconvergencetheoryoftheaxisymllletricnonconlbrlllingelclllclltisestablishedill[31,itisPossibletoproposeanlcthodofth… 相似文献
8.
I.Introduction'In1969,KyFanl[Iprovedthefollowingwell-knownresultsonbestapproximation.Theorem1.1LetXbeanonemptycompactconvexsubsetofalocallyconvextopologicalvectorspaceEandf:X~Ebeacontinuousmapping.TheneitherfhasafixedpointinX,orthereexistapointyo6XandacontinuousseminormponEsucllthat0
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9.
王志华 《应用数学和力学(英文版)》1999,20(3):328-331
IntroductionInrecenttenyears,becauseoftheneedofthecontroltheoryandeconomics,thetheoryofdifferentialinclusionshasbeendevelopingfast,andsome~tresultSindifferenhalinclusionshavebeenobtained.Asystematicstudyondifferenhalinclusionscanbefoundin[l].Inordertosuitcontroltheory,thefollowingsendlineardifferentialinclusionswereconsideredin[2~4]:x'(t) Ax(t)6F(t,x(t)),a.e.teI,x(0)=xo'(l)xthereAgeneratesalinearsendgroup(compactorequicolltinuouS),XisasepotleBanachspaCe,I=[0,TiisanintervalofR,F:IxX~Zx\0i… 相似文献
10.
I.IntroduCtionAtpresent.autollomousinfillitedimensionaldynamicalsystemshavebeenthoroughlystLldicdilltllcory.andwidelyappliedinpracticel'-'1.Forthe11onautonomouscase,[5--91havesttldicd1ilocxistenceanddimensionestimateofattractorsofnonautonomouscase;[12].hasconsideredtileexislellceofinertialmanifolds.Theoretically,inertialmanifoldisaveryusefulInethodtodiscussthelongtimebehaviorofthesolutionstononautonomousinfinitedimcnsiollaldynamicalsystems.Butitcannotbeexpressedexplicitly.Soitisnotconvenient… 相似文献