指数族非线性模型最大似然估计的相合性和渐近正态性

本文我们提出了一些正则条件, 这些条件减弱了Zhu and Wei (1997)文中的条件. 基于所提的正则条件, 我们证明了指数族非线性模型参数最大似然估计的相合性和渐近正态性. 我们的结果可被认为是Zhu and Wei (1997)工作的进一步改进.     

非线性再生散度模型的渐近性质

对非线性再生散度模型,给出了类似于Ｆａｈｒｍｅｉｒ＆Ｋａｕｆｍａｎｎ（１９８５）和Ｗｅｉ（１９９８）的正则条件．基于这些正则条件,证明了最大似然估计的存在性、强相合性和渐近正态性,推广了已有文献的工作．     

一类趋化性生物模型行波解的存在性与正则性

研究了一类趋化性生物模型行波解的存在性和正则性.通过直接计算得到了其行波解存在的充分必要条件;在一定条件下,研究了行波解的正则与非正则的性质;在特殊情形下给出了行波解的显式解.     

一类零膨胀广义线性模型极大似然估计的相合性与渐近正态性

讨论了响应变量为单参数指数族且在零点处膨胀的广义线性模型的大样本性质,对其参数进行了极大似然估计,给出了一些正则条件.基于所提出的正则条件,证明了模型参数极大似然估计的相合性与渐近正态性.     

弱序列式回缩(LM)-空间的特征

本文研究Retakh's条件(M_0),正则性和弱序列式回缩性之间的关系．对于(LM)-空间,弱序列式回缩性等价于正则性加上一个介于(Q_0)和(M_0)之间的条件对于(LN)-空间,我们获得了更满意的结果,证明了弱序列式回缩性等价于正则性加上条件(M_0),也等价于一个非常弱的正则性条件加上条件(M_0)(见文献[1-28])．     

一类线性算子族在在t>0上的紧性

考虑了C1-正则半群{S(t)}t≥0和C2-正则半群{T(t)}t≥0之差Δ(t)=S(t)C1-T(t)C2在一定假定条件下的紧性.     

一类非线性椭圆组的弱解的部分正则性

本文在较弱的椭圆条件(H_1)和更一般的增长条件(H_5)下,证明了二阶非线性椭圆组弱解的C~(1,σ)-部分正则性.     

二维波动方程部分Dirichlet边界控制正则性的数值分析

通过数值方法,研究边界充分(逐段)光滑区域上的二维波动方程在部分Dirichlet边界控制下的正则性问题.数值结果表明:在所选条件下,系统是Salamon-Weiss意义下正则的.     

E-理想拟正则半群

本文定义了一类拟正则半群,所谓E-理想拟正则半群;给出了它以及它的两类特殊情形(E-左正则性拟正则半群,E-半格性拟正则半群)的特征;建立了它们的结构定理,并作为推论获得了左正则带的结构以及带的已知结构(文献[1],Petrich,1967)。     

Retakh条件(M0)与弱(序列式)紧正则性

本文研究了弱(序列式)紧正则诱导极限与凸弱(序列式)紧正则诱导极限.满足Retakh条件(Mo)的(LF)-空间必为凸弱(序列式)紧正则的,但未必为弱(序列式)紧正则的.对于弱序列式完备Frechet空间的可数诱导极限,Retakh条件(Mo)蕴涵弱(序列式)紧正则性.特别地,对于Kothe(LF)-序列空间Ep(1≤p<∞),Retakh条件(Mo)等价于弱(序列式)紧正则性.对于这类空间,利用Vogt的有关结论,给出了弱(序列式)紧正则性的特征.     

Regularity conditions for constrained extremum problems via image space

Exploiting the image-space approach, we give an overview of regularity conditions. A notion of regularity for the image of a constrained extremum problem is given. The relationship between image regularity and other concepts is also discussed. It turns out that image regularity is among the weakest conditions for the existence of normal Lagrange multipliers.     

Linear regularity and ?-regularity of nonconvex sets

In this paper, we discuss some sufficient conditions for the linear regularity and bounded linear regularity (and their variations) of finitely many closed (not necessarily convex) sets in a normed vector space. The accompanying necessary conditions are also given in the setting of Asplund spaces.     

Optimality and Duality for Invex Nonsmooth Multiobjective programming problems

We consider nonsmooth multiobjective programming problems with inequality and equality constraints involving locally Lipschitz functions. Several sufficient optimality conditions under various (generalized) invexity assumptions and certain regularity conditions are presented. In addition, we introduce a Wolfe-type dual and Mond–Weir-type dual and establish duality relations under various (generalized) invexity and regularity conditions.     

拟似然非线性模型中最大拟似然估计的强相合性

This paper proposes some regularity conditions. On the basis of the proposed regularity conditions, we show the strong consistency of maximum quasi-likelihood estimation （MQLE） in quasi-likelihood nonlinear models （QLNM）. Our results may be regarded as a further generalization of the relevant results in Ref. [4].     

On the weak regularity of semigroup rings

Sufficient conditions are obtained under which the semigroup ring of a semigroup, in particular, of an inverse semigroup, is weakly regular. For some inverse semigroups and some orthodox semigroups, the necessary and sufficient conditions for the weak regularity of the semigroup rings are found. A problem is mentioned especially which is much more difficult for weak regularity than for regularity. Only a partial solution of this problem is given for weak regularity.     

具有非连续性系数的两相不可压缩可混溶问题的有限元法

Two phase ,miscible,incompressible flow in porous media is governed by a system of nonlinear partial differential equations. Many numerical methods have been given by didierent authors to this system,hut these methods need very high regularity conditions. Actualty,in most practical applications these regularity conditions couldn‘t be satisfied. In this paper,the problem of discontinuous coefficients with lower regularity conditions is considered and the error estimates are demonstrated.     

The partial regularity for minimizers of splitting type variational integrals under general growth conditions i. the autonomous case

We consider splitting type variational problems with general growth conditions and prove the partial regularity (and the full regularity in 2D) of minimizers in the case of x-dependence. The results obtained generalize the results of Bildhauer and Fuchs concerning such problems with power growth conditions. Bibliography: 17 titles.     

On variational problems with obstacles and integral constraints for vector-valued functions

The authors prove existence and regularity for vectorvalued solutions of n-dimensional variational problems with boundary conditions, integral constraints, and obstacles as side conditions. Main emphasis is given to the regularity proof in the case n=2 generalizing a well known technique due to C. B. Morrey. In addition, a regularity result is stated for the general n-dimensional case.Dedicated to Hans Lewy and Charles B. Morrey, Jr.