模拟电路拓扑可测性设计与分析

本文根据HuangzF等提出的模拟电路故障拓扑可测条件,建立了拓扑可测性设计间题的 图论模型并给出了一种简便算法,讨论了可测性分析的方法并证明了对使用撕裂法处理大网络 十分有用的主子网可测性关系定理。      

等值单元和等值单元定理

本文给出了等值单元、广义状态量、伴随广义状态量等新概念,提出了等值单元定理。      

一种建立弹性力学变分原理的新方法

本文提出一种直接利用弹性力学的基本方程、边界条件建立各种变分原理的新方法,较好地解 决了弹性力学各种变分原理的建立问题。文末还将本法与拉格朗日乘子法作了简单的比较,指 出了拉氏乘子法的一些局限性。      

Conceptual framework for Comparing University baccalaureate programmes in shipping management

For a long time, a maritime education meant the education of a mariner where technical knowledge of seafaring was taught. However, shipping has evolved into a global and sophisticated business where two kinds of managers are required: one that deals with the operation of the vessel and the other that deals with the shore-side business. The education landscape for shipping has also evolved with time. A mariner’s education has evolved from apprenticeship on a ship to a professional certificate from maritime academies. The shore-side business is traditionally staffed by master mariners that made the career transition from sea to shore but the current staffing trend is to employ graduates schooled in business and/or management. It has been long recognised that shore-side business personnel should ideally be also knowledgeable in vessel operations. Under this scenario, several maritime degree programmes have cropped up around the world to bridge the knowledge gap of shore-side business personnel. This paper provides an overview of the evolution of maritime education and selected maritime degree programmes around the world and proposes a conceptual framework for comparing the programmes. The conceptual framework serves as a guide for evaluating maritime education and an aid to curriculum design where choices of courses need to be made to fit into a 3-year or 4-year study programme.     

数字电路板时序电路测试方法

文章通过分析时序电路测试方法,研究了时序电路的功能测试方法。实现了时序电路功能的计算机辅助分析,提取时序功能模块的状态转换图。采用有向图作为的时序电路功能测试模型,采用图论的方法生成时序电路的功能验证测试向量。     

自航式声诱饵对抗声自导鱼雷效能仿真分析

作为潜艇对抗反潜声自导鱼雷的重要装备,自航式声诱饵的战斗使用对最终效果有着重大影响。在简述自航式声诱饵对抗声自导鱼雷基本原理的基础上,建立了潜射自航式声诱饵对抗反潜鱼雷动态过程的多个仿真数学模型,对在声诱饵不同参数下的潜艇生存概率进行了仿真,对模拟结果进行了分析,对潜射自航式声诱饵的作战使用提出了建议。     

燃料电池汽车电液转向系统改制及实施

文章主要介绍燃料电池汽车电液转向系统的改制及实现过程,综合分析改制方案的优缺点,并简要介绍可编程逻辑控制器及其优点。     

基于AutoCAD的船体横剖面几何参数的计算方法

本文介绍应用AutoCAD的绘图和计算功能，提出一种新的船体横剖面的绘制方法。通过对按此法绘制船体横剖面图进行简单的处理，可快速、准确地计算出船体横剖面的几何参数。     

高等级公路维护机械设备现状及发展方向的探讨

本文在广泛搜集国外公路维护所用机械设备的有关资料及国内已通车的主要高速公路调查了解的基础上,对调查情况和资料进行综合整理并提出自已的看法     

城轨交通乘客资讯系统

为满足人们在乘坐城市轨道交通工具的过程中，对不间断接收新闻等一系列资讯信息的需求，不断提升服务水准和服务水平，体现以人为本的宗旨，建立乘客资讯系统是完全必要的。为此对乘客资讯系统的现状、功能和组成方案进行研究和探讨。