润滑工程中可压缩广义雷诺方程

本文证明了由[1]所建立的可压缩流动广义雷诺方程广义解的存在性、非负解的唯一性以及解对边界数据的单调依赖性。     

热传导问题的变分原理和广义变分原理

本文针对热传导问题,首先从微分方程及定解条件出发,利用加权余数法导出其变分原理;然后利用拉格朗日乘子法,吸收第一类边界条件,从而得出其广义变分原理;最后,给出平面和轴对称问题下的推论。     

光测弹性理论中的耦联变分原理和广义耦联变分原理

在本文中,应用拉格朗日乘子法和高阶拉格朗日乘子法[1],我们系统地导出了光测弹性理论中的耦联势能原理,耦联余能原理和具有二类和三类变量的广义耦联势能原理和广义相联余能原理。     

广义弹塑性梁理论及接触问题中的对偶变分不等式

为研究摩擦接触问题，本文建立了一个具有二类独立变量的二维弹塑性梁模型，由此提出了一个新的非线性二次互补性问题。其中的外部互补性条件定义了自由边界；而内部互补性条件则控制弹塑性分界面。文中证明了此二次互补问题等价于一非线性变分不等式，并导出了其对偶变分不等式。     

大位移非线性弹性理论的变分原理和广义变分原理

在前文中[1],作者首次提出了大位移非线性弹性力学的位能原理和余能原理,以及各种完全的和不完全的广义变分原理.但在约束条件和欧拉条件上,证明和叙述都不很明确,有时甚至把原来应该是欧拉方程的误认为是约束条件,如余能驻值原理中,应力位移关系原应是欧拉方程,但把它当作了变分约束条件.这就是说:我们把余能驻值原理约束得超过了必要的要求.还有,在所有变分原理中,应力应变关系式都是不参加变分的约束条件,亦即,他们是从已定应力导出应变或从已定应变导出应力的约束条件.这一点,在文[1](1979)中,并未明确指出.本文并将用高阶拉氏乘子法,导出更一般的广义变分原理(1983)[2].本文使用V.V.Novozhilov的有关非线性弹性力学的成果(1958)[3].     

一类非牛顿流体流动问题的变分原理和广义变分原理

本文将钱伟长教授[1]的不可压缩粘性流的最大功率消耗原理推广到一类特殊的非牛顿流体─-广义牛顿流体的流动问题,并采用识别的拉氏乘子法来解除变分约束条件,导出其广义变分原理。     

凑合反推法和弹性理论中的多变量广义变分原理

详细介绍了如何应用凑合反推法(semi-inverse method)构造弹性理论中的两类独立变量的广义变分原理(包括熟知的Hellinger-Reissner变分原理,Hu-Washizu变分原理)及三类独立变量的广义变分原理(钱伟长广义变分原理) 。应用凑合反推法还可以清楚地看出各变量之间的约束关系,从而再一次证明了Hu-Washizu变分原理实际上是两类独立变量的广义变分原理。     

粘性流体力学的变分原理和广义变分原理

本文建立了不可压缩和可压缩粘性流体力学问题的变分原理,即最大功率消耗原理和它们的广义变分原理.     

关于广义变分不等式与广义拟变分不等式

本文在非常一般的框架下,建立了极大极小不等式,广义变分不等式和广义拟变分不等式,证明了解的存在定理,且它们是在非紧集上得到的,从而推广和改进了[3～13]中的相应结果.     

Solvability of the Reynolds Equation of Gas Lubrication

The first boundary-value problem for the Reynolds equation of the theory of gas lubrication with smooth data is studied. The existence and uniqueness of a solution are established. Bibliography: 7 titles.     

Initial-Boundary Value Problem for the Reynolds Lubrication Equation

The nonstationary Reynolds equation of the theory of gas lubrication is considered. The existence and uniqueness of a solution to the initial-boundary value problem for this equation are established in the case of sufficiently smooth data. Estimates for the solution are obtained for large bearing numbers. Bibliography: 8 titles.     

Unconstrained Methods for Generalized Nonlinear Complementarity and Variational Inequality Problems

In this paper, we construct unconstrained methods for the generalized nonlinear complementarity problem and variational inequalities. Properties of the correspondent unconstrained optimization problem are studied. We apply these methods to the subproblems in trust region method, and study their interrelationships. Numerical results are also presented.     

扰动广义向量变分不等式解的半连续性

本文通过标量化的方法在Hausdorff拓扑向量空间中讨论了扰动广义向量变分不等式解的下半连续性.     

Strict Feasibility for Generalized Mixed Variational Inequality in Reflexive Banach Spaces

The purpose of this paper is to investigate the nonemptiness and boundedness of solution set for a generalized mixed variational inequality with strict feasibility in reflexive Banach spaces. A concept of strict feasibility for the generalized mixed variational inequality is introduced, which recovers the existing concepts of strict feasibility for variational inequalities and complementarity problems. By using the equivalence characterization of nonemptiness and boundedness of the solution set for the generalized mixed variational inequality due to Zhong and Huang (J. Optim. Theory Appl. 147:454–472, 2010), it is proved that the generalized mixed variational inequality problem has a nonempty bounded solution set is equivalent to its strict feasibility.     

广义F-互补问题及其与变分不等式问题的等价性

在Banach空间中引入了一类广义F-互补问题,研究了它与一类变分不等式问题的等价性关系,给出了此类变分不等式问题的解的存在唯一性定理.     

Well-Posedness for Variational Inequality Problems with Generalized Monotone Set-Valued Maps

In this paper, we introduce two new classes of generalized monotone set-valued maps, namely relaxed μ–p monotone and relaxed μ–p pseudomonotone. Relations of these classes with some other well-known classes of generalized monotone maps are investigated. Employing these new notions, we derive existence and well-posedness results for a set-valued variational inequality problem. Our results generalize some of the well-known results. A gap function is proposed for the variational inequality problem and a lower error bound is obtained under the assumption of relaxed μ–p pseudomonotonicity. An equivalence relation between the well-posedness of the variational inequality problem and that of a related optimization problem pertaining to the gap function is also presented.     

A New Hybrid Generalized Proximal Point Algorithm for Variational Inequality Problems

In this paper, we propose a modified Bregman-function-based proximal point algorithm for solving variational inequality problems. The algorithm adopts a similar constructive approximate criterion as the one developed by Solodov and Svaiter (Set Valued Analysis 7 (1999) 323) for solving the classical proximal subproblems. Under some suitable conditions, we can get an approximate solution satisfying the accuracy criterion via a single Newton-type step. We obtain the Fejér monotonicity to solutions of VIP for paramonotone operators. Some preliminary computational results are also reported to illustrate the method.     

大应变固结理论的分区变分原理及其广义变分原理

土体材料本构特性的差异问题与大变形问题是分析岩土材料变形特性的基本问题．根据有限变形的描述方法构筑土体结构大变形固结方程,证明了大变形固结的变分原理A·D2应用分区子结构的连续条件,推导固结理论的分区变分原理．引用Lagrange乘子法构筑并证明了大变形固结问题在无约束状态下的广义分区变分原理．