Dynamic Simulation of a Smart Crank and Slider Mechanism

In this paper, a smart crank and slider mechanism is analyzed mostly from a dynamic view. By means of dynamic explicit finite element method, 3D nonlinear structure is simulated. It is proved that the mechanism can effectively accomplish smart movement prescribed. And in order to ensure reciprocal movement with higher frequency, measures should be taken to avoid over heating of parts. Compared with internal energy, kinetic energy of total rigid body is dominating, and Y direction equivalent rigid velocity is much higher than X direction velocity. Equivalent rigid velocity of all parts is consistent with respective movement condition. For both energy and velocity, slider effect is dominating. Three direction equivalent inertia force oscillates. Force amplitude in Y -direction is comparitively the greatest.     

Maritime accident investigation and temporal determinants of maritime accidents: A case study

This paper presents the results of an investigation into temporal determinants of maritime accidents based on a data-set obtained from the proceedings of formal inquiries in the former German Democratic Republic (GDR). The results show that there is no statistically significant outcome between the probability for an accident and the time of watch. Thus the results do not confirm previous studies, which reported significant time of day effects.The outcome of this study indicates that marine inquiries can provide useful data for an analysis of underlying causes of maritime accidents. It is suggested that accident inquiries should be extended into the area of watch systems employed and should record the hours of work and of rest of the officers on the watch involved in a maritime accident.     

The role of professional associations in shipping

This article is in three parts. The first covers the historical development of qualifying associations. The second covers the particular role of maritime institutions that include The Royal Institution of Naval Architects, The Institute of Marine Engineering Science and Technology and The Nautical Institute. The third and final section considers the future for maritime professional associations in the context of international shipping.     

装配式公路钢桥承载力的有限元分析

指出装配式公路钢桥设计中所采用的简化计算方法的不足,使用大型有限元软件ANSYS对其受力情况和承载力进行了分析,并与简化计算方法作了对比,得出了一些规律性的结论,对实际应用具有指导意义。     

从红海海难看海事管理中的"海恩法则"

2006年2月2日午夜，载有近1400人的埃及“Al Salam 98”号（“萨拉姆98”号）客轮在红海海域沉没，该客轮在红海失事之后，根据埃及运输部长2月13日的声明，“萨拉姆98”号事故共造成611人失踪，发现411具尸体，仅387人幸免于难。     

某电厂一期铁路专用线磁铁矿采空区分布特征与治理

在分析已收集既有采空区资料基础上，进行采空区地表塌陷测绘，用物探成果对采空区分布特征进行详细划分，再用钻探对物探成果进行验证。通过综合勘察方法，初步查明了线路通过处采空区的分布范围、规模，并提出了整治措施。     

车站MQ确报系统故障诊断

围绕车站MQ确报系统安全稳定运行,根据车站MQ工作模式Server、Client、Server/Client、Server/Client/Client,对Scounix、Windows、AIX、VMS环境下车站MQ确报系统安全管理、故障诊断处理步骤以及系统维护注意事项进行了探讨.     

基于UML的C4ISR传感器动态处理模型仿真

现代军事仿真需要建立军事对抗活动中的各类模型，包括武器平台模型、作战模型以及决策模型等，传感器功能仿真模型在系统的开发和研制过程中具有重要意义。如何建立出有效的传感器处理模型来保证信息输入的可靠性和真实性是各类C^4ISR系统都面临的问题，使用统一建模语言（UML）对传感器处理模型进行可视化建模，首先使用用例图和顺序图对C^4ISR系统中2维或者3维传感器工作流程建模，然后使用活动图对整个处理流程和每个处理流程来描述问题的细节，为系统分析员、设计人员和开发人员提供了不同的分析问题、解决问题的视角，使从事C^4ISR系统传感器仿真研究的相关人员可以参考该文提出的模型进行软件开发。     

羽肠粉制取氨基酸的研究

在１００℃，６ｍｏｌ／Ｌ的硫酸作用下，含硬质粗蛋白很高的羽肠粉经１０ｈ水解可制得氨基酸态氮含量为５．２ｍｇ／ｍＬ的氨基酸。其水解液 的酸可用氧化钙中和至微酸性。过滤后的滤液经稀释做为农作物叶面喷施的有机液体肥，而剩余的滤渣亦可做缺硫土壤用的固体肥料。