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.     

科技英语翻译对专业知识的要求

本文从词汇、表达方式和语法结构理解三方面论述了专业知识对科技英语翻译的重要性,同时也简要说明了语言知识也很重要,两者缺一不可,相辅相成。     

水下浇注混凝土灌注桩灌注事故预防及处理

水下混凝土灌注桩在桥梁基础结构中应用广泛，但其施工工艺复杂，受影响因素较多，作者根据多年施工经验，对水下混凝土灌注桩灌注事故预防及处理做出几点分析和总结。     

复杂多电源管理技术及在DSP系统中的应用

随着DSP技术的发展,多电压,大电流,复杂的上下电次序等问题使电源管理成了DSP系统设计中必须首先解决的难题。描述DSP系统的供电原则,结合具体设计,描述电源控制管理的解决方案和具体实现。     

偏压、浅埋、破碎带围岩进洞施工技术探讨

结合司马台隧道施工实例,探讨偏压、浅埋、破碎带围岩进洞施工方法及施工工艺。     

加强高职院校实验教学培养适应企业需求的"双技"人才

提高高职学生的能力素养,培养适应企业需求的技术型、技能型人才是每一个高职院校的培养目标。实验教学是高职院校培养“双技”人才的基地,为学生提供了充分施展才能的空间和平台。     

南水北调中线工程总干渠吴庄隧洞的设计

根据吴庄隧洞所处的地形及各项水力要素,确定出隧洞的多项参数,体现出无压引水隧洞设计所需考虑的问题.     

铁路货车技术管理信息系统段级应用系统现状与分析

介绍了铁路货车技术管理信息系统中段级应用系统的现状和不足之处，提出了改进建议。