液化气体船舶设计建造中值得注意的问题

针对液化气体船舶在检验中出现的问题,依据相关公约和法规,从船舶布置、破损稳性及消防等几方面分析液化气体船舶在设计、建造中应注意的若干问题。     

诊断系统在ECU开发中的应用

介绍诊断系统在带CAN总线ECU开发中的重要意义;阐述ECU诊断系统的设计要点,诊断系统在生产制造系统和售后维修的应用流程,DTC诊断测试的要点及作用。     

国际散化规则对化学品船设计的要求(一)

该文述及国际散化规则的制订过程和修正概况;逐章介绍规则的简要内容;最后阐述国际散化规则对设计和建造化学品船时的要求。     

探讨《地铁设计规范》中的几个问题

就《地铁设计规范》中涉及到的公共区防火分区、紧急疏散、扶梯跨变形缝等条文规定进行理解分析,认为存在有歧义或值得商榷之处,给出个人见解,希望能引起同行在该方面的探讨,促进规范对相关问题进一步明确。     

混沌扩频通信系统仿真

码分多址（CDMA）扩频通信系统的关键问题之一是如何选择优质的扩频码。文章采用Logistic映射方程产生混沌序列,对基于混沌序列的CDMA扩频通信系统进行仿真研究。结果表明,混沌序列具有生成简单,可用码组数目多、保密性能高等优点,可以很好地应用于扩频通信系统。     

明挖结构使用阶段的受力分析

结合《地铁设计规范》的相关条款,通过对明挖结构使用阶段是否考虑施工影响的两种受力分析方法的比较,指出它们的适用条件。     

《国际危规》34-08版修正案生效后包装运输环境有害物质的分类简介

第34—08版《国际危规》于2009年1月1日开始全球自愿实施,12个月后强制实施。环境有害物质的分类方法和标准调整之后,如何做好我国对环境有害物质的检测和分类工作,构建合理可行的监管体系,将直接关系到规则强制生效后的履约质量。文中对纯净物和混合物分类方法分别作了介绍。     

Calibration of safety factors for offshore wind turbine support structures using fully coupled simulations

The offshore wind industry experienced a boost during the last decade in terms of size of wind farms and rated capacity of the wind turbines: towers are getting taller and blades are getting longer, constantly facing new and complex challenges. Because of the relative immaturity of the wind industry, and the fact that the offshore design standards stemmed from the oil and gas industry, it is generally acknowledged that the reliability levels achieved, although not very well understood, might result in partial safety factors not optimal for OWT. This paper addresses this situation by studying the reliability levels delivered by the current standards and assessing the validity of the safety factors through a reliability-based code calibration. The combination of the low probability of failure imposed on the design of OWTs and the computational cost of the aero-elastic time-domain simulations brings out the need to develop new approaches for reliability analyses. In this paper, the reliability analysis is performed using a Kriging surrogate model to approximate the load-effect from the aero-elastic simulations converting expensive-to-evaluate limit state functions to explicit functions. Subsequently, a calibration of the safety factors is carried out using the probabilistic models from literature. The approach is applied to an industry-reference turbine and support structure. The results showed very low probabilities of failure for the most severe design cases and confirm that the safety factors from the IEC are mostly adequate.     

关于无配线车站码序设计方案优化研究

针对无配线车站进站信号机的2种布置(并置/差置)方式,分析了2种设置方式的优缺点,并对其发码过程中存在的问题进行了优化研究,对无配线车站的工程设计具有一定的参考意义。     

分路不良造成机车信号掉码故障分析与电路改进

针对轨道电路瞬间分路不良导致的机车信号掉码故障进行分析研究,提出站内电码化电路的改进措施,提高电码化电路的可靠性。