检索结果-南通市图书馆

Str.ng Limit Theor.ms for.Oscillation Moduli of p.-p.ocess and Cumulative Hazar. p.ocess under.Tr.ncation and Censor.hip.with Ap.lications

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 1999年第2期15卷 235-244页

作者： Liuquan Sun Yong Zhou, Institute of Ap.lied Mathematics, Academia Sinica, Beijing 100080, p. r. china Institute of Ap.lied Mathematics Academia Sinica Beijing P. R. China

In this p.p.r.we obtain exact r.tes of unifor. conver.ence for.oscillation moduli and Lip.chitz-1/2 moduli of p.-p.ocess and cumulative hazar. p.ocess when the data ar. subject to left tr.ncation and r.ght censor.hip. Based on these r.sults, the exact r.tes of unifor. conver.ence for.var.ous typ.s of density and hazar. function estimator. ar. der.ved.

关键词： Tr.ncation and censor.hip Oscillation modulus p.-p.ocess Cumulative hazar. p.ocess Ker.el estimator

Tr.nscendence of Cer.ain Tr.gonometr.c Ser.es

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2002年第3期18卷 481-488页

作者： Yao Chen ZHU Academy of Mathematics and System Sciences. The Chinese Academy of Sciences, Beijing 100080. p. r. china Academy of Mathematics and System Sciences The Chinese Academy of Sciences Beijing P. R. China

In this p.p.r.the tr.nscendence of values of cer.ain tr.gonometr.c ser.es with algebr.ic coefficients and its der.vatives at algebr.ic p.ints is p.oved under.a gener.l condition dep.ndent only on the coefficients. The... 详细信息

关键词： Tr.nscendence Tr.gonometr.c ser.es Linear.indep.ndence Number.field

Char.cter.sing the Accur.cy of Multivar.able r.finable Functions via the Symbol Function

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2001年第2期17卷 277-286页

作者： Qiu Hui SHENG School of Mathematics and Comp.ter.Science. Hubei Univer.ity, Wuhan. 430062. p. r. china Institute of Mathematics. Academy of Mathematics and Systems Science. Academia Sinica. Beijing 100080. p. r. china Han Lin CHEN Institute of Mathematics, Academia Sinica, Beijing 100080, p. r. china School of Mathematics and Comp.ter.Sciences Hubei University Wuhan 430062 P. R. China Institute of Mathematics Academy of Mathematics and Systems Science Academia Sinica Beijing 100080 P. R. China Institute of Mathematics Academia Sinica Beijing 100080 P. R. China

Sup.ose that f（x）=（f1（x）,....fr.x））T, x∈r. is a vector.valued function satisfying the r.finement equation f（x）=∑ ck f（2x-k） with finite set of Zd and some r.r.matr.cex ck. The r.quir.ments for.f to hav... 详细信息

Sup.ose that f（x）=（f1（x）,....fr./sub>（x））p.Tp., x∈r.sup.dp. is a vector.valued function satisfying the r.finement equation f（x）=∑ ck f（2x-k） with finite set of Zp.dp. and some r.r.matr.cex ck. The r.quir.ments for.f to have accur.cy p.ar. given in ter.s of the symbol function m（ξ）.

关键词： Accur.cy Symbol r.finable functions

Absolute Stability of Gener.l Lur.e Contr.l Systems with Multi-Nonlinear.Feedback Ter.s

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2001年第4期17卷 649-656页

作者： Zuo Xin GAN Wei Gao GE Institute of Systems Science, Chinese Academy of Sciences, Beijing 100080, p. r. china Dep.r.ment of Ap.lied Mathematics, Beijing Institute of Technology, Beijing 100081, p. r. china Institute of Systems Science Chinese Academy of Sciences Beijing 100080 P. R. China Dep.r.ment of Ap.lied Mathematics Beijing Institute of Technology Beijing 100081 P. R. China

In this p.p.r. the p.oblenl of absohlte stability for.gener.l Lur.e contr.l systems with multi- nonlinear.feedback ter.s is investigated. Fr.m the Lyap.nov function ap.r.ach. new necessar. and sufficient conditious and some p.actical sufficient conditions of absolute stability ar. der.ved. which imp.ove the absolute stability for.the set. A numer.cal examp.c illustr.tes the effectiveness of the p.op.sed r.sults.

关键词： Gener.l Lur.e system Multi-nonlinear.feedback Absolute stability

Boundedness of Solutions in Asymmetr.c Oscillations via the Twist Theor.m

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2001年第2期17卷 313-318页

作者： Yi Qian WANG Institute of Mathematics. Academy of Mathematics and Systems Sciences. Chinese Academy of Science, Beijing 100080 p. r. china Institute of Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Science Beijing 100080 P. R. China

In this p.p.r.we consider.the boundedness of all the solutions for.the equation x'+ax^+ -bx^-=f(t). wher. f(t) is a smooth 2π-p.r.odic function, a and b ar. p.sitive constants (a≠b).

关键词： Boundedness Asymmetr.c Canonical tr.nsfor.ation Twist theor.m

Finite Tr.velling Waves for.a Semilinear.Degener.te r.action-Diffusion System

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2001年第4期17卷 603-612页

作者： Shu WANG Cheng Fu WANG Dang LUO Dep.r.ment of Mathematics, Henan Univer.ity, Kaifeng 475001, p. r. china Institute of Mathematics, Academy of Mathematics and System Sciences Chinese Academy of Sciences, Beijing 100080, p. r. china Dep.r.ment of Mathematics, Suzhou Univer.ity, Suzhou 215006, p. r. china Dep.r.ment of Basic Science, Nor.h china Institute of Water.Conser.ancy and Hydr.electr.c p.wer. Zhengzhou 450045, p. r. china Dep.r.ment of Mathematics Henan University Kaifeng 475001 P. R. China Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 P. R. China Dep.r.ment of Mathematics Suzhou University Suzhou 215006 P. R. China Dep.r.ment of Basic Science North China Institute of Water Conservancy and Hydroelectric Power Zhengzhou 450045 P. R. China

In this p.p.r. the existence and nonexistence of finite tr.velling waves （FTWs） for.a semilinear.degener.te r.action-diffusion system (uiαit=uixx-multip.y fr.m j=1 to N ujmij, x∈r. t>0,i=1,. . . ,N （Ⅰ） is stud... 详细信息

In this p.p.r. the existence and nonexistence of finite tr.velling waves （FTWs） for.a semilinear.degener.te r.action-diffusion system (uip.αip.t=uixx-multip.y fr.m j=1 to N ujp.mijp., x∈r. t>0,i=1,. . . ,N （Ⅰ） is studied. wher. 0ir.m j=1 to N mij>0, i, j=1, . . . ,N .Necessar. and sufficient conditions on existence and lar.e time behaviour. of FTWs of （Ⅰ） ar. obtained by using the matr.x theor.. Schauder.s fixed p.int theor.m, and up.er.and lower.solutious method.

关键词： Finite tr.veling waves Degener.te r.action-diffusion system Global solution Blow up

On the Simp.e Connectivity of Fatou Comp.nents

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2002年第4期18卷 625-630页

作者： Chun Lei CAO Yue Fei WANG Institute of Mathematics. AMSS. Chinese Academy of Sciences. Beijing 100080. p. r. china Institute of Mathematics AMSS Chinese Academy of Sciences Beijing 100080 P. R. China

We shall show that for.cer.ain holomor.0}ic map., all Fatou comp.nents ar. simp.y con- nected. We also discuss the r.lation between wander.ng domains and singular.ties for.cer.ain mer.- mor.0}ic map..

关键词： Fatou set Julia set Connectivity Singular.ty

Tr.ncation Analysis for.the Der.vative Schr.dinger.Equation

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2002年第1期18卷 137-146页

作者： XU p.ng Cheng CHANG Qian Shun GUO Bo Ling Academy of Mathematics and System Sciences. Chinese Academy of Sciences. Beijing 100080. p. r. china Institute of Ap.lied p.ysics and Comp.tational Mathematics. p. O. Box 8009. Beijing 100080. p. r. china Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 P. R. China Institute of Ap.lied p.ysics and Comp.tational Mathematics 8009 Beijing 10080 P. R. China

The tr.ncation equation for.the der.vative nonlinear.Schr.dinger.equation has been dis- cussed in this p.p.r. The existence of a sp.cial heter.clinic or.it has been found by using geometr.cal singular.p.r.ur.ation the... 详细信息

关键词： Der.vative nonlinear.Schr.dinger.equation Geometr.c singular.p.r.ur.ation theor. Melnikov's technique

A Note on the Singular.Limit of the Exact Contr.llability of Dissip.tive Wave Equations

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2000年第4期16卷 601-612页

作者： Yup.ng Tang Xu Zhang Dep.r.ment of Mathematics, Daxian Teacher.s College, Daxian 63500 Sichuan. p. r. china School of Mathematics, Sichuan Univer.ity. Chengdu 610064. Sichuan. p. r. china Academy of Mathematics and Systems Sciences, Chinese Academy of Sciences Beijing 100080. p. r. china Dep.r.ment of Mathematics Daxian Teacher's College Daxian 635000 Sichuan P. R. China School of Mathematics Sichuan University Chengdu 610064 Sichuan P. R. China Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100080 P. R. China

In this note we analyze the exact contr.llability of singular.y p.r.ur.ed damp.d wave equations under.mor. gener.l geometr.c contr.l condition than that of [1]. We show that the null contr.llability of the heat equati... 详细信息

关键词： Contr.llability Singular.p.r.ur.ation Heat equation Wave equation