用于海底观测网络的海缆远程供电系统的可靠性

提出了串联恒流和并联恒压两种适合应用于海底观测网络的远程供电系统方案;在相同条件下,利用算法分别完成了两种系统的可靠性设计与分配方案,并根据各子单元的分配可靠度计算了两种系统各节点的供电可靠度。分析结果表明：相比于并联恒压远供系统,串联恒流远供系统对子单元的要求相对较低,而各节点的供电可靠度相对较高,说明串联恒流远供系统更适合应用于我国的海底观测网络建设。     

Some comparisons of residual life of coherent systems with exchangeable components

Most of the research, on the study of the reliability properties of technical systems, assume that the components of the system operate independently. However, in real life situation, it is more reasonable to assume that there is dependency among the components of the system. In this article, we give sufficient conditions based on the signature and the joint distribution of component lifetimes to obtain stochastic ordering results for coherent and mixed systems with exchangeable components. Some stochastic orders on dynamic (or conditional) signature of coherent systems are also provided. © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 549–556, 2014     

用非概率理论分析混合不确定性结构的可靠性

针对不确定性结构可靠性分析中的输入变量分布参数具有不确定性和输入变量为区间模型的混合不确定性结构展开研究。考虑到可用信息最少的情况,将分布参数的不确定性描述为区间模型。通过等概率转换方法将随机变量与其分布参数进行分离,使问题转化为随机与区间变量混合的可靠性问题,建立了混合不确定性问题的可靠性分析模型。基于非概率可靠性理论,建立混合不确定结构分析模型的二级极限状态函数并结合Kriging代理模型建立了高效的求解方法。将所建立的混合不确定模型应用于飞行器结构的不确定性分析中,验证了所建模型的合理性和所提方法的高效性和准确性。     

Limiting survival functions of self‐similar structures

We show the existence of a unique analytic single parameter limiting survival function arising from the repeated composition of a coherent structure as the number of components tends to infinity. Examples include the repeated composition process of the bridge structure. © 2003 Wiley Periodicals, Inc. Naval Research Logistics, 2004.     

核试验地震核查的模糊逻辑推理综合识别方法

建立了一种增强性模糊推理方法,用来满足综合地震事件识别判据的需求。利用这种推理方法进行了地震事件模糊逻辑推理综合识别方法研究,给出了方法的框架。实例研究表明这种综合识别方法在核试验地震监测中有减少可疑事件数量的能力。     

A unified model incorporating yield,burn‐in,and reliability

The correlated improvement in yield and reliability has been observed in the case studies on integrated circuits and electronic assemblies. This paper presents a model that incorporates yield and reliability with the addition of a burn‐in step to explain their correlated improvement. The proposed model includes as special cases several yield and reliability models that have been previously published and thus provides a unifying framework. The model is used to derive a condition for which yield functions can be multiplied to obtain the overall yield. Yield and reliability are compared as a function of operation time, and an analytical condition for burn‐in to be effective is also obtained. Finally, Poisson and negative binomial defects models are further considered to investigate how reliability is based on yield. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004.     

基于模糊理论的武器系统可靠性分析和评价

武器系统可靠性是指在规定条件下和规定时间内完成规定功能的能力。传统的可靠性计算方法是基于概率论的,其失效概率通常应根据第一手的数据。然而,实际上不可能收集到足够的数据,一般是依靠专家的经验来判断估计,这类判断通常与模糊性密切相关。本文基于可靠性理论和模糊数学的原则和方法,建立了一套计算串联系统和并联系统的模糊可靠度的计算公式。应用模糊数对武器装备系统单元可靠性予以模糊评价,并采用模糊可靠性计算模型,对武器系统可靠性进行模糊分析和计算。通过对一高炮武器系统的应用分析,证明了该方法的可行性。     

基于调整型的战术导弹批检试验抽样方案设计

为通过批检试验准确检验导弹的质量,提出基于调整型的战术导弹批检试验抽样方案设计思路。调整型抽样检验方法的应用,可适时调整抽样方案的宽严程度,提高检验效率,并为订货方和生产方提供适当的风险保护,把抽样检验和导弹的质量变化联系在一起形成一个动态检验过程。     

浅谈高中奥林匹克生物学科竞赛的辅导

近年来,高中生物奥赛在全国各地蓬勃发展,但对其研究的文献并不多,特别是缺乏来自一线教师的经验介绍,使许多优秀的经验得不到发扬和推广。这就造成了许多有兴趣的生物教师,不知道如何辅导本校的学生参加生物奥赛活动,事倍功半,致使教师和学生都错过了一个体现自我价值的重要途径。针对这一现状,本文以"高中生物学联赛"为例子,谈谈在高中如何辅导生物奥赛,希望对大家辅导有所帮助;也希望从中引起更多优秀教师的关注,可以分享到他们的成功经验。     

中亚来华留学生汉语学习动机差异性分析

本文通过对新疆师范大学的中亚来华留学生学习动机进行调查,用差异性检验方法,从性别、学历方面进行数据统计分析,从而发现问题,得出结论,为留学生汉语学习动机问题的研究提供参考。