吸引子的逼近

本文考虑耦合振子系统及对其按时间离散化(时间长为h)得到的离散动力系统.证明在一定条件下,这两个系统都有一维整体吸引子l和l_h.进一步证明当时间步长h→0时,l_h→l.     

锥上的逼近定理和不动点定理

设E是实Frechet空间,K是E上的锥,D是含θ点的开凸集,记DK=D(?)K,设映射T:(?)_k(?)E→2~k是连续凝聚映射,则存在u(?)使P(T(u)—u)=P(T(u)—(?)),其中P是集D的Minkowski泛函,作为本定理的应用,给出了一些新的不动点定理,同时,在适当条件下,本文给出了锥上的环上的一个逼近定理。     

Λ—极点存在性定理以及Hilbert空间中的正半定算子

Cesari,L.与Suryanarayana,M.B.[1]讨论了实Banach空间Z中的闭凸锥∧具有性质(π)时,空间Z中任何一个非空∧一有界集B的弱∧一极点的存在性问题,本文推广了[1]中引理4.1的结果,并讨论了Hilbert空间中正半定算子的强制性条件的特征性质以及利用[3]得到的变分不等式得到了一个∧     

多目标规划的Mond—Weir型对偶

本文主要讨论目标函数和约束函数都是Invex类函数的多目标规划的Mond-Weir型关于锥极解意义的对偶性,推广了Mond和Weir(1981),Egudo和Hanson(1987)的结论。本文提出了α—锥极解的概念,并讨论了关于多数α的带参考指标C的多目标规划的Mond—Weir型关于α—锥极解意义的对偶性问     

On a theory of micropolar protoelastic material bodies and constitutive equations for nonlocal micropolar elastic continua

In this paper the definition of micropolar protoclastic material bodies is given and with the help of the principle of virtual power, the variational principle of those bodies is derived. In terms of that same idea and the definition of micropolar protopotential presented here, the constitutive equations for nonlocal micropolar elastic continua are naturally derived.     

The finite-element-force method for solving plane problems of elasticity

Using elements in the form of arbitrary sectors, the author has devised a plan for solving plane problems of elasticity by the force method. The method is characterized by a smaller number of nodes, a more convenient computation and a perfect adaptability to the particular shape of the region in question.     

Positive solutions to （n-1,1） m-point boundary value problems with dependence on the first order derivative

Using the extension of Krasnoselskii＇s fixed point theorem in a cone, we prove the existence of at least one positive solution to the nonlinear nth order m-point boundary value problem with dependence on the first order derivative. The associated Green＇s function for the nth order m-point boundary value problem is given, and growth conditions are imposed on the nonlinear term f which ensures the existence of at least one positive solution. A simple example is presented to illustrate applications of the obtained results.     

全连续算子的歧点

本文得到全连续算子和锥映象的新的歧点和渐近歧点定理,并指出它们的固有值的某种全局特征．