Japanese perspective of driver information systems

A perspective view of of Japanese R&D activities of Driver Information Systems is given from the standpoint of developing joint projects by public and private sectors. First, a brief history of the R&D activities is illustrated from above mentioned standpoint. Then, two major projects, AMTICS and RACS, and the social backgrounds of these projects are explained. In order to give a clear idea of both projects some technical details are treated.Based on the history and the present status of the developments, the basic design conceptions of Japanese Driver Information Systems are explained and several factors or reasons which have influenced to the design conception are discussed. Then, the promoting systems of the R&D activities are generally explained and present status of the projects and future problems in developing more advanced systems are also handled. A brief discussion on the establishment of international standard is also mentioned as a final comment.     

对中国未来10年道路交通安全状况分析与初步预测

笔者从中国现代道路交通系统的发展现状与道路交通安全状况出发，以过去10多年中国汽车、摩托车保有量的发展轨迹为基础，对中国未来一定时期（2004～2015年）机动车保有量的发展变化及政府采取不同管理对策条件下的道路交通安全状况的发展水平进行了预测。结果表明：政府管理对策对道路交通安全状况变化具有决定性影响。     

航海类高职院校“船舶管理”课程实践教学的思考与实践

航海类高职院校“船舶管理”课程的实践教学在学生船员职业品质和法律素质的形成与发展过程中具有重要作用。“船舶管理”课程实施多种实践教学环节,达到全方位、立体化的教育教学效果和课程目标的实现。     

Finite-difference simulation of green water impact on fixed and moving bodies

A numerical method was developed to predict the water impact pressure caused by green water phenomena. The density function method was employed in the framework of a locally refined overlapping grid system. The simple problem of a rectangular body placed in regular waves was considered and the simulation results were compared with tank experiments. Good agreement with experiment was shown for wave–body interactions and for the pressure values at three different positions on the body. The case of a rectangular body with a vertical wall on the deck was also considered and the comparison showed satisfactory agreement. It was demonstrated that this method could be extended to a moving body problem, in which the body was free to undergo heave, pitch, and surge motions.     

建筑项目管理信息化意义重大

随着中国加入WTO,大量外资项目引进以及经济持续高速发展,中国工程项目在基建、房产、公路、水利、能源、勘测等方面的规模和数量急剧增长。与此相比,工程项目管理中的信息技术开发和应用水平并没有"与时俱进"。     

T型管节点焊趾表面裂纹扩展行为的三维断裂力学分析

本文对海上平台T型管节点焊趾三维空间翘曲表面裂纹问题用6869自由度、半带宽1187的特大规模作了三维有限元分析，计算了沿裂纹前缘的KⅠ、KⅡ和KⅢ分布。在此基础上，对焊趾表面裂纹的疲劳扩展行为作了分析，绘制了裂纹扩展特性曲线，并根据特性曲线对扩展寿命进行了估算。预测结果与海上平台管节点委员会的试验结果相符。     

总纵强度耦合作用下船体板架振动计算

船体在海上营运时，船体产生中拱状态弯曲和中垂状态弯曲，所以船体板架是处在复杂弯曲状态。以往船体板架振动计算都忽略了这种影响。本文讨论用有限元方法和原理应用于这类计算，推导了板架局部振动的计算方法，给出了计算实例。通过计算表明，本文方法可用于实际，为舰船振动校核计算提供了手段。     

关于海事人为因素的层次分析法

航海是一项有风险性的行业,船只在航行中遭遇自然灾害和意外事故导致人身和财产损失的情况是比较常见的。一直以来航运界都在企图找到发生海上事故的原因以减少损失、降低风险,在气候、环境、船舶结构、设备诸方面都做了研究,却收效甚微。其实再先进的船舶也得由人来操纵,人的素质高低对船舶航行的安全有着主要的影响。本文将探讨用层次分析法对导致海事发生的人为因素进行分析。     

曲线弯梁桥振动理论分析

利用广义坐标法和能量原理推导曲线梁桥的振动控制微分方程,解释曲线梁桥振动理论与直线梁振动理论的异同点,在推导质量矩阵的显式表达式过程中考虑截面扭转中心与截面形心的不一致。随后给出了曲线梁动力分析的有限元方法,并完成了相应电算程序的编制。最后通过实例分析并验证本文所提计算理论和计算方法的正确性。     

舰船综合电力推进监控系统研究

研究分析了舰船电力推进系统的发展历史及其特点。提出了舰船综合电力推进监控系统的二层网络体系结构。对主要子系统的功能进行了阐述,分析了系统的关键技术。指出由于综合电力推进系统在动力性、经济性、安全性以及灵活性等方面具有诸多明显的优势,它已成为21世纪舰船动力发展的主要方向。