Stochastic ordering and a class of multivariate new better than used distributions

A new characterization for the univariate class of new better than used ‘NBU’ distributions in terms of stochastic ordering is introduced. A multivariate version of this characterization is then used to define a multivariate class of NBU distributions. Basic properties of this class are derived. Comparisons and relationships of this new class with earlier classes are developed. Two multivariate new worse than used (NWU) classes of life distributions are defined and compared and their basic properties are studied.     

A class of test statistics for testing whether new is better than used

A class of test statistics Is proposed for testing that a life distribution Is exponential against that it is new better than used and not exponential, Consistency, unbiasedness and the asymptotic normality for the one class of class of test are proved. The efflication are compeled and compared with some otner statinties. The proposed test is shown to perform well against other tests.     

欧盟通用绩效评估框架及其对我国的启示

本文探讨欧盟通用绩效评估框架及其对我国的启示和借鉴意义.在总结多元实践模式的基础上,展示欧盟通用绩效评估框架的特点及其在国际实践中的地位;从总体结构、指标界定与考察因素、计分方法三个方面,展示欧盟通用绩效评估框架的内容结构;阐述欧盟通用框架的实施程序及其特点;讨论欧盟通用绩效评估框架的应用及其发展趋势,以及欧盟通用绩效评估框架对我国的启示和借鉴.     

现代汉语与土家语常用合成词结构比较

汉语和土家语虽同属汉藏语系,但二者的语族语支不同。通过对现代汉语与土家语常用合成词结构的比较,探讨二者的类型和差异,从而找出现代汉语与土家语之间的内在联系和规律,这对研究土家族语言文化具有重要的现实意义。     

A Dynamic Discrimination Information Based On Cumulative Residual Entropy And Its Properties

In this article, we introduce a measure of discrepancy between two life-time distributions based on cumulative residual entropy. The dynamic form of this measure is considered and some of its properties are obtained. The relations between dynamic form and some well-known concepts in reliability such as mean residual life-time, hazard rate order, and new better (worse) than used are studied.     

Optimal Acquisition and Sorting Policies for Remanufacturing

The condition of the used items acquired by remanufacturers is often highly variable, and sorting is an important aspect of remanufacturing operations. Sorting policies—the rules specifying which used products should be remanufactured and which should be scrapped—have received limited attention in the literature. In this paper, we examine the case of a remanufacturer who acquires unsorted used products as needed from third party brokers. As more used items are acquired for a given demand, the remanufacturer can be more selective when sorting. Thus, two related decisions are made: how many used items to acquire, and how selective to be during the sorting process. We derive optimal acquisition and sorting policies in the presence of used product condition variability for a remanufacturer facing both deterministic and uncertain demand. We show the existence of a single optimal acquisition and sorting policy with a simple structure and show that this policy is independent of production amount when acquisition costs are linear.     

汽车主锥总成刚度调节研究

给出了汽车主锥总成圆锥滚子轴承刚度调节的计算和测量模型，得出了刚度调节规律，实现刚度调整垫圈的最优选择。提供的测量模型和一些典型特性曲线具有重要参考价值。     

"江郎才尽"新解

自钟嵘《诗品》评江淹才尽后,古今论者从不同的角度探讨了其才尽的各种原因。本文依据江淹创作历程的发展轨迹及其情感的起伏变化,认为江淹才尽的根本原因在于其主体心志的衰竭与情感的枯萎。     

Bayes and empirical bayes estimation of the probability that z > x + y

Let X, Y and Z be independent random variables with common unknown distribution F. Using the Dirichlet process prior for F and squared erro loss function, the Bayes and empirical Bayes estimators of the parameters λ(F). the probability that Z > X + Y, are derived. The limiting Bayes estimator of λ(F) under some conditions on the parameter of the process is shown to be asymptotically normal. The aysmptotic optimality of the empirical Bayes estimator of λ(F) is established. When X, Y and Z have support on the positive real line, these results are derived for randomly right censored data. This problem relates to testing whether than used discussed by Hollander and Proshcan (1972) and Chen, Hollander and Langberg (1983).     

古代汉字形体歧异现象的处理——兼对王力主编《古代汉语》某些注释商兑

本文以王力主编的教材《古代汉语》对古今字、通假字、异体字的注释中值得商榷之处为例，说明对古文中经常出现的汉字形体歧异的现象，在进行注解或编纂辞书时应注意结合具体汉字的产生历史、形体结构、本义与引申义之间的关系等因素加以较全面的考察，才能尽可能稳妥地把各类性质不同的古书汉字形体歧异现象区别开来，并给以准确的解释和说明。