Ιshikawa迭代程序对拟压缩映射的稳定性

在P -一致凸的Banach空间内 ,证明了Ishikawa迭代程序对拟压缩映射是T -稳定的     

多媒体API函数在VFP中的应用

Windows API函数在编程中有着极为广泛和重要的作用，笔者重点介绍了三个多媒体API函数在VFP中的使用，并给出了一则应用实例．     

General Lagrange multiplier theorems

A cone constraint is used to develop a general Lagrange multiplier theorem for normed linear spaces. Conditions for the payoff functional multiplier to be less than zero are given for Banach spaces. Sufficiency theorems involving Lagrange multipliers are developed for abstract programming problems. Generalizations of certain properties of convex functions will be used for optimization problems.     

Asymptotic joint distribution of the largest roots of several multivariate F matrices I. Quasi-independent case

An asymptotic expansion of the joint distribution of k largest characteristic roots C_M⁽ⁱ⁾(S_iS₀^?1), i = 1,…, k, is given, where S'_is and S₀ are independent Wishart matrices with common covariance matrix Σ. The modified second-approximation procedure to the upper percentage points of the maximum of C_M⁽ⁱ⁾(S_iS₀^?1), i = 1,…, k, is also considered. The evaluation of the expansion is based on the idea for studentization due to Welch and James with the use of differential operators and of the perturbation procedure.     

A multidimensional Newton-Raphson method and its applications to the existence of asymptotic Fn-estimators and their stochastic expansions

Given a suitable function F_n we define a class of estimators called asymptotic F_n-estimators (i.e., estimators which approximate the solution of F_n(θ) = 0). It is proved that this class is nonvoid if appropriate regularity conditions are fulfilled and if one has at hand a suitable initial estimator. Furthermore, it is shown that F_n-estimators admit a stochastic expansion (which enables to give results on asymptotic expansions for the distribution of these estimators).     

当代党史研究的理论指南——三论"三个代表"的时代价值

江泽民在建党 80周年重要讲话中论述的“三个代表”思想 ,是当代党史研究的理论指南。首先 ,它为党史研究提供了科学的历史认识和评判尺度 ;其次 ,它从“理论创新”和教育塑造后人两方面对党史研究功能进行了新概括 ;再次 ,它所构建的社会主义建设的历史哲学使党史研究真正成为一门科学 ,历史与逻辑相统一的分析方法等也为党史研究提供了科学的方法论指导     

同向双螺杆挤出熔融理论研究中对啮合区的处理

对啮合区的处理是同向双螺杆挤出理论研究中的难点之一。采用能量法计算啮合区对熔融过程的影响,并将这一影响引入熔融过程的非啮合区理论模型中,获得了比较接近实测数据的计算结果。     

Cold rolling mill process: a numerical procedure for industrial applications

The paper proposes a model for a cold rolling mill process in the full-film regime that uses lubricant emulsion sprayed on at the entrance of the strip. The aim of the model is to forecast the reduction of strip thickness versus the flow rate of lubricant given the other operation parameters. The model includes strip plastic deformation, lubricant flow and lubricant viscosity depending on pressure. The mathematical problem is a free boundary one and a numerical procedure, applied to an industrial plant, is presented with some results.     

网络环境下的导读工作

导讯工作的好坏,体现着图书馆服务质量的好坏,文章阐述了网络环境下的导读工作的重要性和必要性,介绍了网络环境下导读工作的方式方法、工作程序及应遵循的原则。     

营养治疗对慢性呼吸衰竭病人体液免疫功能的影响

探讨营养支持疗法对慢性呼吸衰竭并营养不良病人体液免疫功能的影响,结果表明,PN组的营养状况及体液免疫功能均明显上升（P＜0．05）,而对照级无显著化（P＞0．05）,免疫功能的上升有利于对呼衰的纠正。