国产轻型汽车排放现状与分析

本文综述了国产轻型汽车的基本情况，指出轻型汽车的排气污染物是造成汽车对大气污染的最主要来源，根据试验结果评述了国产轻型汽车的排放现状，然后进行了试验分析，最后简要介绍了影响汽车对大气污染的各种因素。     

汽车车身柔性装焊生产线探讨

阐述了建立汽车车身柔性生产线的必要性，指出了车身装焊生产线是汽车车身柔性生产的关键，从工艺设备、工装夹具、机械化输送及自动控制几个方面控制实现柔性汽车装焊生产线的措施。分析了柔性装焊生产线－车身生产发展的趋势，论证了计算机是实现柔性自动控制的核心。     

汽车弯道制动试验响应分析

汽车弯道制动是一种危险而复杂的工况，其复杂性表现在影响因素多和评价方法两方面。文中通过试验，分析了影响汽车弯道制动性能的主要因素。从试验结果来看，用稳定性和偏移量两个评价指标，可以较全面评价汽车弯道制动性能。     

Transient responses of a VLFS during landing and take-off of an airplane

The transient elastic deformation of a pontoon-type very large floating structure (VLFS) caused by the landing and take-off of an airplane is computed by the time-domain mode-expansion method. The memory effects in hydrodynamic forces are taken into account, and great care is paid to numerical accuracy in evaluating all the coefficients appearing in the simultaneous differential equations for the elastic motion of a VLFS. The time-histories of the imparted force and the position and velocity of an airplane during landing and take-off are modeled with data from a Boeing 747-400 jumbo jet. Simulation results are shown of 3-D structural waves on a VLFS and the associated unsteady drag force on an airplane, which is of engineering importance, particularly during take-off. The results for landing show that the airplane moves faster than the structural waves generated in the early stage, and the waves overtake the airplane as its speed decreases to zero. The results for take-off are essentially the same as those for landing, except that the structural waves develop slowly in the early stage, and no obstacle exists on the runway after the take-off of airplane. The additional drag force on an airplane due to the elastic responses of the runway considered in this work was found to be small in magnitude.     

公路工程不同报价评标办法结果的经济合理性分析

根据交通部颁布的“公路工程施工招标投标办法”及有关文件,采用3种不同标底对某项工程的投标报价进行评定,并对评定结果进行分析,研究探讨最适合市场经济特点的科学评标办法。     

Parallel computing with domain decomposition for the vehicle crashworthiness simulation

The research presented in the paper deals with explicit nonlinear finite element calculation with domain decomposition for vehicle crashworthiness simulation. This is very important for vehicle design. Parallel computing is an efficient solution method to speedup and enhance the solving ability of large-scale numerical simulation. In this paper, a cost-effective domain decomposition method based on contact balance is presented, and the algorithm flowchart including contact computing is provided, and the parallel computing process and communication overhead are analyzed. Furthermore, scalability of the parallel computing method on different hardware platforms, the SGI Onyx 3800 and the ShenWei cluster, is studied. Finally, the effect of different domain decomposition strategy on vehicle crashworthiness simulation computing efficiency is presented. To end users, the research results should provide a reference for vehicle design and choosing appropriate hardware platform and computing software.     

基于SWOT分析的广西沿海铁路公司保价运输策略

应用SWOT分析法对广西沿海铁路股份有限公司保价运输具有的优势和劣势,面临的机会和威胁进行系统分析,探索在现有内外部环境下,保价运输营销策略应重点选用增长型策略（SO）和扭转型策略（WO）,即：扩大市场、保护现有市场份额、提高市场占有率的战略来巩固现有市场地位,开拓新市场。     

船载直升机着船预报系统及评估方法

介绍船载直升机着船预报系统的硬件组成和几种常用的预报方法,提出一种基于微成分分析的新的预报方法。最后,对综合考虑横摇和纵摇2种运动的着船预报效果进行评估。     

利用机车信号数据分析补偿电容工作状态

为了弥补ZPW-2000移频轨道电路补偿电容动态检测盲区,通过实践验证并总结了利用机车信号数据分析站内侧线股道补偿电容工作状态的方法,从技术方法上解决了利用机车信号数据分析来弥补站内侧线股道处于动态检测死角问题,为分析ZPW-2000移频轨道电路补偿电容工作状态提供一种新方法。     

CTC与列控中心通信故障的处理方法

针对一起典型CTC与列控中心系统通信故障的原因分析和处理过程,提示了在系统设计和维护中应注意的相关问题。