共查询到20条相似文献,搜索用时 15 毫秒
1.
A CLASS OF SINGULARLY PERTURBED BOUNDARY VALUE PROBLEMS FOR NONLINEAR DIFFERENTIAL SYSTEMS 总被引:27,自引:0,他引:27
MO Jiaqi 《系统科学与复杂性》1999,(1)
Considerthesingularlyperturbednonlinearproblemfory=(y1,…,yn)oftheformwhereεisasmallpositiveparameter,f=(f1,…,fn),g=(g1,…gn),fi(x,y')≡fi(x,y'1,…,y'n),gi(x,y')≡gi(x,y'1,…,y'n),A=(A1,…,An),B=(B1,…,Bn).ManyauthorssuchasHowes[1],O'DonnelllZ],Lin[3],Mo[4--7]andothershavediscussedthisproblemundervarioussituationsusingthemethodofdifferentialinequalities.Thispaperconcernsaclassofboundaryvalueproblemsfornonlineardifferentialsystemsusingtheiterationmethodandthetheoryofdifferentialinequaliti… 相似文献
2.
FORWARD-BACKWARD STOCHASTIC DIFFERENTIAL EQUATIONS, LINEAR QUADRATIC STOCHASTIC OPTIMAL CONTROL AND NONZERO SUM DIFFERENTIAL GAMES 总被引:1,自引:0,他引:1
WUZhen 《系统科学与复杂性》2005,18(2):179-192
In this paper, we use the solutions of forward-backward stochastic differential equations to get the explicit form of the optimal control for linear quadratic stochastic optimal control problem and the open-loop Nash equilibrium point for nonzero sum differential games problem. We also discuss the solvability of the generalized Riccati equation system and give the linear feedback regulator for the optimal control problem using the solution of this kind of Riccati equation system. 相似文献
3.
GAO Hang 《系统科学与复杂性》1995,(4)
ONACLASSOFANISOTROPICDIFFUSIONEQUATIONSONACLASSOFANISOTROPICDIFFUSIONEQUATIONS¥GAOHang(DepartmentofMathematics,FudanUniversit... 相似文献
4.
SUNChuren 《系统科学与复杂性》2005,18(1):111-118
It is difficult to judge whether a given point is a global maximizer of an unconstrained optimization problem. This paper deals with this problem by considering global information via integral and gives a necessary and sufficient condition judging whether a given point is a global maximizer of an unconstrained optimization problem. An algorithm is offered under such a condition and finally two test problems are verified via the offered algorithm. 相似文献
5.
CUI Shangbin 《系统科学与复杂性》1995,(3)
POSITIVESOLUTIONSFORDIRICHLETPROBLEMSOFSINGULARSEMILINEARELLIPTICEQUATIONS¥CUIShangbin(DepartmentofMathematics,LanzhouUnivers... 相似文献
6.
XIANG Xiao ling 《系统科学与复杂性》2000,(1)
1.IntroductionManyphysicalsystems,suchajsthemodynamics,electrodynamics,populationbiology,aregovernedbydifferentialequations,integrodifferentialequationsormoregenerallyfunctionaldifferentialevolutionequationsonBanachspace.Associatedoptimalcontrolprobl... 相似文献
7.
DING Yanheng LI Shujie 《系统科学与复杂性》1992,(2)
In this paper,we prove the existence of multiple periodic solutionsfor a class of singular Hamiltonian systems with sublinear terms via variationalmethods. 相似文献
8.
HE Xiaoliang WANG Miansen Department of Mathematics. Xi''''an Jiaotong University Xi''''an China 《系统科学与复杂性》1993,(2)
In this paper. we are concerned with the stability and control problem for aclass of second-order linear systems in Banach space. First. a criterion for the exponentialstability of a first-order linear system is presented. Then. the exponential stability as wellas some properties of a class of second-order linear systems is proved. At last. the feedbackcontrol of this class of systems is investigated. 相似文献
9.
YU Nairun WANG Miansen ZHU Guangtian Department of Basic Courses Northwest Textile Institute Xian China Department of Mathematics Xian Jiaotong University Xian China Institute of Systems Science. Academia Sinica Beijing China 《系统科学与复杂性》1993,(2)
In this paper, a class of flexible systems of beams with coupled bending andtorsional vibrations, which has important applications in the dynamics of aircraft is dis-cussed. The existence and uniqueness of the solution for this class of systems are proved,where the spectral analysis method and the unconditional base theory are used, and asufficient condition for the asymptotic stability of the closed-loop system is obtained bymeans of the (D) class operators theory. 相似文献
10.
ZHENG Yufan CAO Li Applied Mathematics Research Laboratory East China Normal University Shanghai China 《系统科学与复杂性》1993,(3)
The notion of ranking was initiated into control theory by Glad a few yearsago. In this paper we mainly discuss one kind of rankings and study its invarianceproperties. This kind of rankings is closely related to the structure algorithm. The relationsbetween invariants of this kind of rankings and the invariants given by other studies, e.g.the invertibility indices of a system and so on, are examined. As applications of rankings,we deal with some well-known problems in "ranking technique". In this paper we mainlyintroduce a new method rather than solve new problems. 相似文献
11.
YANG Enhao 《系统科学与复杂性》1995,(4)
BOUNDONSOLUTIONSTOTHEGENERALSYSTEMOFVOLTERRA-TYPELINEARINTEGRALINEQUALITIESINSEVERALVARIABLESANDITSAPPLICATIONSTOINTEGRO-PART... 相似文献
12.
In this paper,we discuss the optimal control of growth rate for a class of population systems governed by nonlinear degenerate parabolic equations.Given an ap-propriate cost functional,we prove the existence of the optimal growth rate and give some necessary conditions for optimal growth rate. 相似文献
13.
In this paper, supposing that the received signals at the input are of the formv(t)=s_1[t, x_1(t)]s_2[t, x_2(t)]+n(t) where s_i are FM signals (i=1, 2), a novel cross-coupledphase-locked loop (CCPLL(M)) and its mathematical model are obtained. The globalqualitativestructural analysis of the mathematical model of the first-order loop, the acqui-sition region and synchronization region of the first-order loop, and the synchronizationregion of the second-order loop are obtained. 相似文献
14.
We consider optimal birth control for the McKendrick equation of population dyna-mics.It consists of optimizing a system described by a first order partial differential equationwith nonlo-cal bilinear boundary control.Approximate minimum principles are obtained usingEkeland's vari ational principle. 相似文献
15.
ZHANG Fubao 《系统科学与复杂性》1998,(2)
1.IntroductionandLemmasThree-pointboundaryvalueproblems(BVPforshort)forthreeorderdifferentialequationsareveryusefulincertainpracticalworkandattractcloseattentionextensively,see[l--41.Recently,in[11,GuptaandLakshmikanthamstudiedthefollowingthree-pointBVP:U'(x)=f(x,ulU',U)--e(x),(l)u(0)=u(n)=u(1)~0,(2)wheref:[0,1]xR3-RdoesnothavetobecontinuousandnE(0,1).ThemainresultisthefollowingTheoremLetfsatisfyCarntheodory'sc.nditions[1]andthefollowingconditions:i)3a,b,cER,or(x)ELI[0,1],suchthatfo… 相似文献
16.
GUO Baozhu 《系统科学与复杂性》1996,(4)
THEOPTIMALCONTROLOFAGE-DEPENDENTPOPULATIONDYNAMICSBASEDONPARITYPROGRESSION¥GUOBaozhu(DepartmentofAppliedMathematics,BeijingIn... 相似文献
17.
STOCHASTIC ADAPTIVE SWITCHING CONTROL BASED ON MULTIPLE MODELS 总被引:1,自引:0,他引:1
ZHANGYanxia GUOLei 《系统科学与复杂性》2002,15(1):18-34
1 IntroductionIn an uncertain and complex environment, the approach of "optimal" switching is often usedfor making decisions through predicting and comparing the effects of multiple schemes. In thearea of control, the mu1tipIe model approach, which has been used to improve estimations andcontrol accuracies, can be traced back at least to 1960s--1970s(see, e.g., [1l--[3l). Some practicalapplications have also been reported[4,']. In adaptive control, switching cootroller based onmultiple models… 相似文献
18.
ZENGLuchuan 《系统科学与复杂性》2004,17(4):500-510
The purpose of this paper is to introduce and study a new class of generalized strongly mixed implicit quasi-variational inequalities in Hilbert spaces, which includes the known class of generalized mixed implicit quasi-variational inequalities as a special case. By applying the auxiliary variational principle technique, the existence of solutions for this class of quasi-variational inequalities is proved. Moreover, a new iterative algorithm for computing approximate solutions is constructed and the convergence criteria for this iterative algorithm are also established. 相似文献
19.
LIUZihui CHENWende 《系统科学与复杂性》2004,17(1):86-95
The possible weight hierarchies of ternary codes of dimension 4 satisfying thealmost chain condition are completely determined in this paper. 相似文献
20.
SHI He 《系统科学与复杂性》1999,(Z1)
1.NotationsLetR3,1betheMinkowskifour-dimensionalspacewithcoordinatesx=(x')x',x',x').ThemetricdsZ=Zgijdx'dxjofR3'1isgivenbygll=gab=gb3=l,g'=--1,andgij~0fori/j.Letgi(2)betheLiealgebraofgroupSU(2).Theanti-Hermitianrepresentationsofabasisofgi(2)aretakenasfollows:inwhichi=n.Theconnectionisa1-forminwhichThereare12unknownfunctionsA,Thecurvaturetensorsaregivenbyinwhichoj=0/oxj,j=l,2,3,4.TheYang-MillsequationofSU(2)onR3)1is(see[1])TheYang-Millsequationconsistsof12equationsYMjk=0,j~1,2,3,4,k~… 相似文献