构建生态宜居的海滨港口城市——天津滨海新区十一五市政交通建设成就回顾

天津滨海新区是天津市重要的生态宜居型海滨港口城市。该文首先介绍了天津市总体规划对于滨海新区空间发展功能定位以及道路交通网络格局,然后回顾了十一五期间滨海新区市政交通基础设施建设概况,包括道路、交通、城镇等方面的建设成就。最后阐述了一些重点工程的技术特点。     

京张城际铁路八达岭车站方案研究比选

京张城际铁路在穿越军都山地段时,考虑长城景区和延庆县市郊运输需要而设八达岭站,设计分别对地面、地下站位方案进行研究比选,在地下站方案中研究了延庆方向联络线出线方案、车站到发线有效长方案、车站埋深方案、车站结构形式方案,并进行综合分析比选,通过多层次、多方案比选,推荐采用方案Ⅱ。     

Westrace联锁系统与LED信号机接口电路的探讨

天津地铁1号线正线Westrace联锁系统VLOM模块的安全热灯丝检测与非安全冷灯丝检测功能与LED信号机接口的解决方案的探讨。     

银行业务软件测试评价研究

运用系统工程方法,结合银行业务软件的特点,为银行业务软件的测试建立指标体系,用层次分析法确定各指标的权重,并用可能-满意度法计算各指标的满意度,最后通过计算综合满意度对测试作出评价。     

钢筋混凝土简支梁碳纤维布加固机理研究

针对钢筋混凝土简支梁的损伤,承载力下降,需要补强加固。文章介绍了碳纤维布的物理力学特性,阐述了碳纤维布钢筋混凝土简支梁的加固机理。通过应力—应变关系分析,确定了碳纤维布加固层的应力分布规律和梁体端部锚固长度的计算方法。     

清洁能源 大陆集团动力总成系统的使命

<正>以"清洁能源"为愿景和使命的大陆集团动力总成事业部将战略焦点放在了提升传统发动机燃油效率,以及推进电气化技术发展上。去年9月,中国政府发布了第五阶段的轻型汽车污染物排放限值及测量方法(国五标准),将中国汽车行     

Cross-sectional shape design and optimization of automotive body with stamping constraints

At conceptual design stage, automotive body is usually simplified as a frame structure, which consists of thinwalled beams (TWBs). Therefore, the most important issue is to determine the cross-sectional shape of TWBs under the requirement of mechanical properties. However, design engineers mostly depend on their experience or repeated modification to design the cross-sectional shape of TWBs. So this paper presents a rapidly cross-sectional shape design and optimization method to satisfy the demand of mechanical properties and meanwhile minimize the weight of TWB. Firstly, cross-sectional mechanics property formulations are summarized. Especially, the torsional rigidity formulation of three-cell cross section is derived for the first time in this paper. Secondly, the shape optimization model is created to minimize the weight of TWB and improve the mechanical properties, which is solved by genetic algorithm. Moreover, three stamping constraints, draft angle, chamfer radius and assembly, are introduced to promote the cross-sectional shape more practice. Lastly, numerical examples verify the effectiveness of the optimization model and show the application in structural modification of automotive frame.     

Overseas Investment:The Resources Needs To Lead The Financial And Manufacturing Industries

American subprime crisis has evolved into a global financial crisis, dragging the entire economy, hitting the fictitious economy the most.Under such a situation,the world's investment environment changes inevitably as a result. In talking about the influence of the financial crisis upon China,the most immediate consequence     

建筑企业利润流失原因浅析

针对目前建筑企业利润率持续走低,不少企业经营艰难,勉力维持的现状,结合多年工作经验对建筑企业利润流失的原因从外部环境和内部管理两大方面进行了详细的分析,并提出了一些建设性的建议。     

压力传感器自动检定系统设计

针对压力传感器检定过程中实验数据量大,处理流程复杂,容易产生人为误差这一现象,建立了一套压力传感器自动检定系统.介绍了该系统的工作原理、系统组成和基于Labwindows/CVI的自动检定软件设计方法.该系统实现了压力传感器检定过程中的测试数据自动采集和记录、检定数据自动处理、结果打印等功能.压力传感器自动检定系统与传统的检定方法相比,不但提高了检定效率,减少了人为误差,而且对检定系统的准确度和稳定性也有了提高,同时使整个检定系统更加系统化、规范化.