武汉近代教会学校发展概述

作为中国交通心脏的武汉，在近代也是西方教会对其实施文化影响的重要地区，但也因此促进了武汉教育发展。该文总结了西方教会在武汉办学的发展情况，叙述了几所著名的教会学校并分析武汉教会学校建筑特点。     

李顿调查团与南京国民政府国联外交得失

长期以来,史学界围绕南京政府对国联的外交政策问题,一直进行着广泛而热烈的讨论,但在对许多问题的认识上,观点并不一致.本文围绕南京国民政府国联外交的得失评价这一问题,分析李顿调查团来华期间及国联处理东北问题的最后阶段的活动,阐明:中国在国联外交上的成就孤立和打击了日本侵略者,从而使中国在道义上赢得了国际社会的同情和支持.     

城市规划设计院的责任与使命

随着我国经济体制的转变,各地城市规划设计院的管理模式呈现多样化的特征,但无论采用何种模式,城市规划设计院的责任与使命不能丢,职业道德不能沦丧。     

Robustness Validation – A physics of failure based approach to qualification

Product reliability is crucial to the success of a company. Product qualification today is based on standards that follow a stress-test driven approach, meaning pre-defined stress tests with pre-defined stress conditions. However, reliability requirements have increased, while at the same time both designs of semiconductor components and usage of these components in the applications have increasingly been pushed to the limits. This development raises the question, how far the standard procedures are still suitable for reliability assessment. Robustness Validation is an approach to a failure-mechanism-driven qualification that was primarily initiated by the automotive industry but has a much wider range of applicability. The paper will give an introduction to the basic ideas of Robustness Validation. Some limitations including statistical aspects will also be discussed.     

Excessive software development: Practices and penalties

This study focuses on the tendency to develop software excessively, above and beyond need or available development resources. The literature pays little attention to this issue, overlooking its crucial impact and penalties. Terms used in reference to excessive software development practices include over-requirement, over-specification, over-design, gold-plating, bells-and-whistles, feature creep, scope creep, requirements creep, featuritis, scope overload and over-scoping. Some of these terms share the same meaning, some overlap, some refer to the development phase, and some to the final system. Via a systematic literature search, we first demonstrate the poor state of research about excessive software development practices in the information systems and project management areas. Then, we suggest a framework consolidating the problems associated with excessive software development in three ‘beyond’ categories (beyond needs, beyond resources, beyond plans), describe and analyze their causes, consequences, boundaries and overlapping zones. Finally, we discuss the findings and present directions for future research.     

让建筑师愉悦成长 访浙江绿城东方建筑设计有限公司

面对当下过热的市场环境,浙江绿城东方建筑设计有限公司以推进中国建筑师职业化水平为企业使命,积极探索系统化的人才培养和管理创新体系。     

Optimal sequencing of warm standby elements

Warm standby redundancy has been used as an effective design technique for improving the reliability of a system while achieving the compromise between restoration cost and operation cost of standby elements. This paper considers the optimal standby element sequencing problem (SESP) for 1-out-of-N: G heterogeneous warm-standby systems. Given the desired redundancy level and a fixed set of element choices, the objective of the optimal system design is to select the initiation sequence of the system elements so as to minimize the expected mission cost of the system while providing a certain level of system reliability. Based on a discrete approximation of time-to-failure distributions of the system elements, the system reliability and expected mission cost are evaluated using an iterative procedure. A genetic algorithm is used as an optimization tool for solving the formulated SESP problem for 1-out-of-N: G warm-standby systems with non-identical elements. As illustrated through examples, results generated using the suggested methodology can facilitate the system reliability versus cost trade-off study, which can further assist in the decision making about the best standby policy for fault-tolerant system designs.     

面向战术飞机任务推演的威胁空间分析

根据战术飞机任务推演的特殊需求,文中提出了快速、逼真、交互式的威胁空间分析方法.首先介绍了战术飞机任务推演的概念,然后说明威胁空间分析的对象.在此基础上分别提出了武器系统威胁空间模型和非武器系统威胁空间模型:前者根据武器系统性能模型,考虑飞机雷达反射截面变化和地形遮蔽带来的影响,给出了探测类和歼毁类武器系统的威胁空间;后者给出了天气、地面碰撞、空中碰撞等威胁来源产生的威胁空间.接着提出威胁空间表达特有的方式,最后简单说明了推演系统的实现方法.     

一种改进的主动规则的系统执行模型

主动规则及规则处理机制一直是主动数据库研究的薄弱环节,主要表现为:(1) 语义不够丰富;(2) 缺乏基础语义;(3) 缺乏对规则处理的层次化和结构化的描述.为弥补上述不足,对规则处理机制赋予了丰富的规则延伸语义,根据语义的要求,用规则处理树层次化和结构化地描述规则处理过程对系统状态的影响.新的系统执行模型和扩展后的事务使我们能够提出一种支持丰富语义的规则处理算法.与其他规则处理算法相比,该算法实现了新语义,并利用了递归技术,能更好地吻合规则处理过程.