4,041 research outputs found

    Study on Assessment Method of The Quality of Building Structure Design

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    我国的建筑业跟着城市化进程的快速推进得到了飞速发展,社会对建筑美感的追求也不断增强,越来越多的高层、日益复杂的建筑造型和环境作用使结构设计的任务更加困难。结构设计的综合性较强,需要考虑的因素众多,而这些因素又是相互制约相互影响的关系。例如要满足复杂的建筑造型,但也要尽可能保证结构的规则性和安全等性能要求;确保结构具有足够刚度承受荷载的同时还要确保结构的延性设计;要尽可能地使结构经济但也要确保结构的安全适用等。虽然在近十年时间里,计算机逐渐普及和计算性能得到了飞速发展,让即使再小的设计院也能对高层结构甚至超高层结构进行计算,但我国结构设计质量的水平差距过大的现象并未有所缓解。最主要的原因还是设计...With the rapid advancement of urbanization,Chinese Construction Industry has developed at full speed.Because of the growing pursuit of architecture aesthetics,there are more and more high-rise buildings with increasingly complex architectural shapes which makes building structure design more difficult.Structure design is quite comprehensive which needs to consider many factors.However,interaction...学位:工学硕士院系专业:建筑与土木工程学院_结构工程学号:2532014115177

    Design and Implementation of Enterprise Payment Management System.

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    在信息化时代,企业信息化的建设实现对国企改革和更好的经营起到了关键的作用,管理模式也发生着巨大的改变。在企业管理中,财务管理的不断完善优化有利于企业经营业绩提升和企业可持续发展,其中支付管理的改革尤为重要。支付管理系统是一个一体化的财务支付管理系统,因为要实现与已有系统的数据对接,在目前市场上企业有类似支付系统的很少,所以为企业设计开发一个能对公司资金支付全面监控和科学管理、流程简洁规范、可使支付集中高效的人性化支付管理系统显得非常必要。 企业支付管理系统是一个一体化的财务支付管理系统,通过对支付管理系统的调研分析,决定采用C#语言进行开发,jQuery技术作为前端框架,.NETFramew...In the information age, the enterprise informatization is critical for state-owned enterprises reform and management, along with the tremendous change of management mode. Constantly improvement and optimization of financial management is beneficial to enhance enterprise operation performance and sustainable development, especially payment management reform is particularly important during enterpri...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323131

    Research on method of model selection in basement of high-rise building structure design

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    随着建设规模的不断扩大和土建技术的进步,现代高层建筑地下室的形式越来越多样化,工程环境条件更加的复杂,地下室结构设计时所需考虑的因素更多、所需处理的问题更复杂。地下室结构在整体结构中所占的比重越来越大,所需工期越来越长,使得地下室结构方案的选择对整体结构的影响也越来越重。地下室结构选型是地下室结构设计中的一个重要环节,具有涉及因素多,不确定性大,各因素间相互关联性大等特点。随着建筑工程信息化的发展,迫切需要一个准确性高、覆盖面广、操作便捷的地下室结构方案选型决策辅助工具,帮助结构设计师全面、准确地开展地下室结构方案设计。 为此,本文提出一种全面、合理的地下室结构方案选型辅助方法。论文首先概括...With the continuous expansion of the scale of construction and with the progress of civil engineering,form of modern high-rise building basement become more diverse.Engineering environment conditions are more complex.When designing the structure of the basement,more factors need to be considered and more complex issue needed to be dealt with.The proportion of basement structure in the overall stru...学位:工学硕士院系专业:建筑与土木工程学院_结构工程学号:2532013115180

    Research on Structural Design and Mechanical Behavior of Double Arc Tooth Profile Harmonic Drive

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    谐波齿轮减速器是一种传动精度高、减速比大并能够在密闭空间传动的齿轮传动机构,应用领域广泛,尤其在航空航天领域有不可替代的优势。常用的渐开线齿廓齿根处会出现应力集中以及齿顶产生尖点啮合现象,影响其承载性能和啮合质量。双圆弧齿形谐波齿轮以其良好的承载能力与啮合性能逐渐成为研究热点,本文根据谐波齿轮设计理论设计了双圆弧谐波齿轮装置,并对其结构性能、接触特性以及动力学等方面的分析,探索相关规律,为后续在结构优化、增强啮合性能提供了一定的理论依据。 论文主要包括以下几方面内容: 1.基于齿轮啮合原理和柔轮弹性变形过程的分析设计双圆弧谐波齿轮。根据双圆弧齿廓谐波齿轮的运动关系,将柔轮的弹性变形过程融入...The harmonic drive(HD) reducer is a gear mechanism of high precision, large transmission ratio, the ability to work in a closed space. It has been used in various regions, especially in aeronautics and astronautics. The double arc tooth profile harmonic drive is becoming a hot area of research for its advantage in torsional stiffness and meshing performance. The paper designed a set of double arc ...学位:工学硕士院系专业:物理与机电工程学院_机械制造及其自动化学号:1992012115273

    Design and Implementation of Card Management Electric Vehicles Information System Based on Struts

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    电动车作为一种新型能源的交通工具,以其价格低、保养低、使用便利、易驾驶等特点,受到大众的喜爱,已经成为城市中重要的交通工具之一。但是,电动车数量的增加给社会也带来了较多的不便,由于电动车安全防护差、行车人交通意识差、被盗率高等问题,给交通部门带来较多繁琐的工作。需要开发对电动车管理的系统,对电动车实行编码,让电动车也有自己的“身份证”从而有效的管理电动车,因此开发以卡管车信息系统来管理电动车对社会的治安稳定有重要的意义。 系统基于Struts框架,采用Java语言、JSP技术、Hibernate框架技术,以及SQLServer2005数据库等,设计并实现了以卡管车信息系统。该系统涵盖了电动车...Electric vehicle is a new energy vehicles, with its low cost, low maintenance, convenient use, easy driving features, popular, has become one of the most important traffic tools in the city. However, the increase in the number of electric vehicles to the society also brought many inconvenience, because the electric safety protection difference, driving traffic consciousness difference, stolen rate...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323047

    Design and Research of the High-Speed Hardware Architecture of H.264 Intra encoder

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    视频以其直观、高效等特性在数字电视、移动通信领域有着广泛的应用,视频技术也因而成为近年来的研究热点之一。视频压缩技术作为视频技术的一种,极大的促进了高清晰视频在实时传输与存储方面的应用。新一代视频压缩标准H.264是目前应用最为广泛的压缩标准,相比之前的标准,新技术的采用使得H.264在压缩性能方面有了极大的提升。然而,H.264帧内编码算法较高的算法复杂度和较强的数据依赖性使得编码过程需要消耗大量的时间,这极大的阻碍了H.264标准在实时通信中的应用。硬件结构模型因具有高并行性的特点使其相比软件模型在速度上更具优势,因此H.264帧内编码器硬件结构的设计与研究有着很好的应用前景和科研价值。 ...Video has a wide range of applications in the field of mobile communication and digital TV for its intuitive and efficient, so that video technology has become a research hotspot in recent years. As a kind of video technology,video compression technology has greatly promoted the application of high definition video in real time transmission and storage. H.264 is currently the most widely used comp...学位:工学硕士院系专业:信息科学与技术学院_电路与系统学号:2312012115287

    Structure design of Fe/N/C electrocatalysts for oxygen reduction and its active sites study

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    热解型Fe/N/C作为最具潜力的非贵金属氧还原催化剂,其综合性能的进一步突破,对于推动低温燃料电池商业化应用具有极其重要的意义。不过,Fe/N/C催化剂仍面临着几方面的挑战。首先是传质扩散问题。Fe/N/C催化剂在燃料电池阴极的载量较高,其传质的难度远高于商业化的Pt/C(厚度100μmvs.10μm)。其次是对其活性位结构的认识。对活性位和反应机理的深入认识有助于进一步理性设计和提高Fe/N/C催化性能。然而,复杂、非均相结构、缺乏合适的表面表征技术和谱学技术,使得其活性位和催化机理研究止步不前。基于此,本文的工作主要分两部分展开:1)通过设计Fe/N/C催化剂的结构改善传质,包括制备复合碳...Pyrolyzed Fe/N/C is one of the most promising non-precious-metal catalysts for the oxygen reduction reaction (ORR), which is supposed to boost the commercialization of proton exchange membrane fuel cells (PEMFC). In spite of recent significant technological advances, a couple of major challenges remain on the way to the widespread application of Fe/N/C catalyst. The first challenge is mass transfe...学位:博士后院系专业:化学化工学院_物理化学学号:201417002
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