Planning gamma accelerated degradation tests with two accelerating variables

Gamma accelerated degradation tests (ADT) are widely used to assess timely lifetime information of highly reliable products with degradation paths that follow a gamma process. In the existing literature, there is interest in addressing the problem of deciding how to conduct an efficient, ADT that includes determinations of higher stress‐testing levels and their corresponding sample‐size allocations. The existing results mainly focused on the case of a single accelerating variable. However, this may not be practical when the quality characteristics of the product have slow degradation rates. To overcome this difficulty, we propose an analytical approach to address this decision‐making problem using the case of two accelerating variables. Specifically, based on the criterion of minimizing the asymptotic variance of the estimated q quantile of lifetime distribution of the product, we analytically show that the optimal stress levels and sample‐size allocations can be simultaneously obtained via a general equivalence theorem. In addition, we use a practical example to illustrate the proposed procedure.     

不断赋予思想政治工作优良传统新的时代内涵

不断赋予思想政治工作优良传统新的时代内涵,必须准确把握赋予思想政治工作优良传统时代内涵的基本视阈、主要着力点和实践路径.     

领导干部要做依法办事的模范

依法办事是依法从严治军的重要内容。领导干部贯彻依法从严治军要求,必须做依法办事的模范,提高思想认识,牢固树立依法办事的观念;加强学习运用,切实提高依法办事的本领;坚持正确导向,努力营造依法办事的氛围;健全保障机制,不断促进依法办事的落实。     

以问责为载体促进军事训练创新发展

以问责为载体促进军事训练创新发展,要深刻认识推行军事训练问责的重大意义;积极探索军事训练问责的特点规律;努力提高军事训练问责的综合效益。     

不断提高党委贯彻党的根本制度的质量

提高党委贯彻党的根本制度质量,要把抓好民主集中制的学习作为防止和克服党委工作行政化的紧迫任务和基础工程来抓,打牢"一班人"思想基础;把深刻理解根本制度的科学内涵和基本要求作为防止和克服党委工作行政化的前提基础,切实澄清模糊认识;把加强检查督导作为防止和克服党委工作行政化的重要保证,切实发挥正副书记的表率作用和制度机制的约束作用.     

The assignment of storage locations to containers for a container stack

Assigning storage locations to incoming or reshuffled containers is a fundamental problem essential to the operations efficiency of container terminals. The problem is notoriously hard for its combinatorial and dynamic nature. In this article, we minimize the number of reshuffles in assigning storage locations for incoming and reshuffled export containers. For the static problem to empty a given stack without any new container arrival, the optimum reshuffle sequence is identified by an integer program (IP). The integer program captures the evolution of stack configurations as a function of decisions and is of interest by itself. Heuristics based on the integer program are then derived. Their competitiveness in accuracy and time are established by extensive numerical runs comparing them with existing heuristics in literature and in practice as well as with extensions of the existing heuristics. Variants of the IP‐based heuristics are then applied to the dynamic problem with continual retrievals and arrivals of containers. Again, numerical runs confirm that the IP‐based heuristic is competitive. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

落实“三个紧贴”战略要求 增强改进创新思想政治工作的实效

落实"三个紧贴"战略要求,增强改进创新思想政治工作的实效,必须深刻理解"三个紧贴"的科学内涵,真正把思想统一到胡主席的重要指示精神上来;坚持以科学发展观为统领,切实把握好改进创新思想政治工作的目标导向;始终围绕理论联系实际这个核心,努力增强思想政治教育的实效性;加大党委对这项工作的领导和指导力度,切实提高加强改进创新思想政治工作的质量.     

表面类裂纹缺陷与地磁场相对空间位置对漏磁场检测的影响

采用低频电磁场的有限元单元分析方法，分析铁磁性金属零件表面类裂纹缺陷与地磁场的空间相对位置变化对缺陷处漏磁场的影响，并通过试验进行了验证。结果表明：相对空间位置对漏磁场强度值影响较大，但对漏磁场强度曲线的变化特征影响不大。当缺陷与地磁场磁力线相互垂直时，漏磁场强度值最大；当缺陷与地磁场磁力线平行时，漏磁场强度值最小。这表明当采用漏磁场检测方法进行无损探伤时，零件的空间方向可能会影响探伤结果。     

《军语》选词范围的变异与规范问题浅析

《军语》选词对象的范围是军队各专业领域，包括各级指战员必须掌握的综合性用语和需要了解的专业性术语。在《军语》的实际编纂中，其选词范围的变异与规范并存。根据《军语》的性质，从主观和客观两方面的原因分析，《军语》选词范围变异主要涉及三个规范化问题。