Selective Maintenance in System Reliability with Random Costs of Repairing and Replacing the Components

In this paper we consider the problem of determining the optimum number of repairable and replaceable components to maximize a system's reliability when both, the cost of repairing the components and the cost of replacement of components by new ones, are random. We formulate it as a problem of non-linear stochastic programming. The solution is obtained through Chance Constrained programming. We also consider the problem of finding the optimal maintenance cost for a given reliability requirement of the system. The solution is then obtained by using Modified E-model. A numerical example is solved for both the formulations.     

粤港澳合作打击有组织犯罪的新路径——以经济领域的防控策略为视角

获取垄断性经济利益是有组织犯罪的最终目的，雄厚的经济实力反过来又推动着有组织犯罪的发展。因此，粤港澳在合作打击有组织犯罪方面，应当将经济领域的防控策略作为重中之重、急中之急，从完善经济体制与管理制度、联手打击洗钱犯罪活动、对有组织犯罪实施财产刑等多方面着手，以真正取得釜底抽薪、斩草除根的效果。     

Computing the probability of hash table/urn overflow

We analyze the probability of a random distribution of n balls into m urns of size b resulting in no overflows. This solves the computational problem associated with a classical combinatorial extreme-value distribution. The problem arose during the analysis of a technique, called perfect hashing, for organizing data in computer files. The results and techniques presented can be used to solve several problems in the analysis of hashing techniques     

试论幸福感与健全人格的关系

幸福感是一种人格特质.它具有某种神经生理结构,决定着个人的行为,是一种可以与其他特质相对区别的人格特质,是健全人格的一个重要因素.幸福感也可以表现为个人的心理状态,因情境的变化而改变.     

审美－自由的需要，生命的升华

本文以辩证唯物主义为理论基础,借助精神分析和完形心理学的研究成果,指出由于艺术作品中的力的结构与人的心理"力"的结构存在着异质同构的关系,故审美教育对实现完美人格,达到精神自由和生命的升华具有重要意义.     

再论国共"党内合作"的维持与破裂

依据若干重要历史资料 ,重新审视国共“党内合作”的维持与破裂是非常必要的。国共“党内合作”关键是外力作用的结果 ,它是国共合作的“唯一形式” ,而非“最好形式” ;国共“党内合作”得以在“病态”中维持 ,在主观上共产国际的“坚持”和在“挤柠檬汁”理论指导下采取机会主义的平衡策略是根本的和直接的原因 ;国共“党内合作”的基础和条件决定了合作的历史阶段性 ,不应过分强调国共合作破裂的个人责任     

Perfect simulation for correlated Poisson random variables conditioned to be positive

In this paper we present a perfect simulation method for obtaining perfect samples from collections of correlated Poisson random variables conditioned to be positive. We show how to use this method to produce a perfect sample from a Boolean model conditioned to cover a set of points: in W.S. Kendall and E. Thönnes (Pattern Recognition 32(9): 1569–1586, 1999), this special case was treated in a more complicated way. The method is applied to several simple examples where exact calculations can be made, so as to check correctness of the program using ²-tests, and some small-scale experiments are carried out to explore the behaviour of the conditioned Boolean model.     

"CAJ-CD规范"修改及推广过程中应注意的问题--从湖北省文科学报执行"CAJ-CD规范"情况谈起

湖北省文科学报较早地整体性地采用了"CAJ-CD规范",但在执行过程中,仍然有不尽人意的地方.这除了部分学报对"CAJ-CD规范"认识上有偏差,甚至是没有吃透"CAJ-CD规范"以外,"CAJ-CD规范"本身存在的缺陷以及在推广过程中的不足也是造成这种情况的重要原因.因此,必须在加强对"CAJ-CD规范"的学习的同时,进一步完善"CAJ-CD规范",加大"CAJ-CD规范"的推广力度,力争使"CAJ-CD规范"成为国人撰写学术论文的通用格式,而不仅仅是学术期刊的一种编排格式.     

On Inverse Problems of Optimum Perfect Matching

As far as we know, for most polynomially solvable network optimization problems, their inverse problems under l ₁ or l norm have been studied, except the inverse maximum-weight matching problem in non-bipartite networks. In this paper we discuss the inverse problem of maximum-weight perfect matching in a non-bipartite network under l ₁ and l norms. It has been proved that the inverse maximum-weight perfect matching under l norm can be formulated as a maximum-mean alternating cycle problem of an undirected network, and can be solved in polynomial time by a binary search algorithm and in strongly polynomial time by an ascending algorithm, and under l ₁ norm it can be solved by the ellipsoid method. Therefore, inverse problems of maximum-weight perfect matching under l ₁ and l norms are solvable in polynomial time.     

高校公用计算机实验室的管理与维护

高校公用计算机实验室数量多、单间实验室面积大、机器台数多、使用的软件涵盖了几乎各个学科,使用者程度不同,除了承担教学任务外,还承担各类不同的计算机统考任务,如何有效地管理和维护好这些计算机是一件非常重要的事情。以琼州学院电子信息工程实验中心公用计算机实验室的管理和改革为实例,论述了高等学校公用计算机实验室的管理与维护,从实践本身对如何提高软硬件的运行效率,保证实验教学正常、高效地开展进行探讨.