501 research outputs found

    Study on Substructure Topology Optimization and VirtualPrototype Technology and Their Application for Wheel Loader Structure

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    大型装备的优化问题是近几十年来学术和工程界研究的热点,根据优化目标的不同,发展出众多优化理论和计算方法。 以结构静力学和动力学为基础,有限元方法为工具的结构优化,特别是结构拓扑优化是近年来结构优化领域中的前沿课题,在计算方法上,子结构理论成为解决大规模和复杂结构有限元计算的有效手段。 结合结构动力学和机构运动学的虚拟样机技术是代替物理样机对产品进行创新设计优化的数字化设计方法,用以缩短产品开发周期、降低成本、改进质量。 装载机是我国工程机械领域生产规模最大的产品。本文结合相关课题,以轮式装载机为研究对象,对装载机机罩进行了基于子结构的有限元分析和拓扑优化;对装载机工作装置进行了运动特性研...Optimization of the large equipment is the hotspot in academic and engineering fields in recent decades,according to the different optimization objectives,many optimization theories and algorithms has developed. Based on the kinematics and dynamic,structure optimization,especially topology optimization by Finite Elment Analysis is the advanced report in structural optimize field in recent years, ...学位:工学硕士院系专业:物理与机电工程学院机电工程系_机械设计及理论学号:1992008115294

    Limited liability company shares transfer contract problems probing

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    随着现代公司的发展壮大,股权已成为社会财富的重要法律载体,股权流转日益频繁。公司通过签订股权转让合同的形式转让股权既可以确保老股东顺利退出公司,又可促成新股东平稳加盟,在促进社会财富流转方面有着诸多的益处。股权转让指向的公司既包括有限责任公司,也包括股份有限公司(含上市公司)。与有限责任公司相比,股份有限公司尤其是上市公司的股权流通性更强。然而,鉴于我国司法实践中数量最多、法律关系最复杂的股权转让纠纷案件往往发生在有限责任公司,本文拟就有限责任公司股权转让合同存在的问题作一初探,通过对几种特殊情形下的有限责任公司股权转让合同进行剖析,提出了看法和建议,以期望有益于有限责任公司股权转让合同问题的...With the development of modern company, Equity has become important laws carrier of social wealth, equity transfer increasingly frequent. The company through the form of signed stock transfer contract can ensure the old partner exit a company smoothly, But also contributed to a new shareholder joining in smoothly, and has many benefits to promote circulation of social wealth. Equity transfer point...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:1362008115079

    尚德敬业求真启思导创育人──记我国著名高等教育学家潘懋元先生

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    本文从“高度的热情、高尚的品格、高深的学问、高明的教法和高超的口才”五个方面对我国著名的高等教育学家潘公元先生的德、识、才、学、能进行了全方位的评述

    preliminary exploration on the importance and cultivation of the subject consciousness of sketch

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    在中国传统文化的背景下,作画过程中画家的主体意识早已得到了文化界相当程度的重视。虽然写生的行为在中国画坛自古就有,然而写生的概念和作为美术基础教学的写生方式实际上是西方的舶来品。面对以造型的准确为依据的西方写生体系,作画者是否应当坚持探寻写生过程中自我的主体意识?如果说,探寻作画者的主体意识对写生本身以及作画者的艺术发展是不可替代的,那么如何在写生过程中培养作画者的主体意识呢? 基于以上的疑问,本文尝试进行初步地探索。作画者的主体意识对其写生过程中的各个阶段都有着关键的意义。第一部分主要阐述了写生中作画者主体意识的重要性;第二部分以塞尚写生实践的探索为例,分析如何在写生过程中探索和培养自我的...In Chinese traditional culture under the background of the painting process, the subject consciousness of painter already got considerable attention to cultural circles. Although the act of sketch in China since ancient times, however the sketch and the concept as the basic teaching of art painting method is actually western import. In the face of the accurate modeling based on Western painting sy...学位:文学硕士院系专业:艺术教育学院美术系_美术学学号:1862009115307

    迷狂与距离——由理性与感性在艺术中的作用而产生的对艺术价值标准的认识

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    艺术究竟是受感性支配还是由理性控制?艺术能完全脱离现实吗?作为老百姓和一些艺术初学者,面对艺术市场的的不完善以及天马行空五花八门的艺术品,又该如何判断?我们应该如何看待纷繁复杂的艺术世界?本文通过分析感性和理性因素在艺术中的不同作用,简要论述了作者个人对艺术价值标准的看法。帮助艺术类初学者和艺术工作者妥善处理好在学习与工作中面临的感性与理性的变化与矛盾

    Design and Implementation of LIMS Based on B/S

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    国家重点实验室一直是我国基础研究的主力军,它的建设极大地改善了我国 基础研究的工作条件,在提高我国知识创新能力,发展高新技术,推动学科发展, 培养和聚集优秀人才,维护国家安全,参与国际合作与竞争等方面发挥了重要作 用。随着国家重点实验室建设及其研究工作的深入开展,管理工作的作用逐渐受 到人们的重视,在每个实验室配备一套网络化的管理信息系统以提高管理工作的 效率成为一个必需条件。 论文从实验室信息管理系统应用的角度出发,深入研究探讨国家重点实验室 信息化建设的目的,做出了详细的需求分析,明确了系统所应具备的功能。并在 此基础上规划出系统架构,明确了以面向对象方法为软件开发方法、以...State key Laboratories are the main force of the basic research of our country. Its construction has greatly improved the working conditions of the basic research of our country. And it plays an important role in improving our country’s capability of knowledge innovation, development of high-tech, promotion of the development of science, train and gathering outstanding ta...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X200923042

    STUDY ON MOUNTIAN BROAD-LEAF FOREST of WARM THARACTER of NAITIAN IN TONGAN,XIAMEN

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    据对2个100M2样地统计,共含维管束植物66种分属32料58属.群落区系以樟、茜草和山茶等科的属种居多数;热带、泛热带地理成分分别占总属数的44.5%和33.3%.树种以米槠、木荷、青冈和红勾栲为主,林下多见九节木、朱砂根等雨林种类,显示群落是当地基带植被南亚热带雨林向高海拔山地常绿阔叶林过渡的类型.This paper deals with the floristic composition, structure and synthetical features of tree species on the mountian broad-leaf forest of warm tharacter of Naitian in Tongan, Xiamen.According to the surveys of 200m2 in 2 plots, there are 66 species of vascular plants belonging to 58 genera in 32 families.Analysis of floristic geographical elements indicated that the percentage of tropical and pan-tropical elements (such as the genera of Lauraceae, Rubiaceae and Theaceae, etc.) are dominant, making up 44.5% and 33.3% of the total numbers of genera respectively.The community of Naitian in Tongan is Chiefly Castanopsis carlesii, C.lamontii, Schima su-perba, Cyclobalanopsis glauca and Engelhardtia roxburghiana, etc.Analysis of floristic composition indicated that this forest is the transition type from foundational vegetation zone of south ?subtropical rain forest to mountion evergreen broad-leaf forest on higher altitude

    Design Method Rooted in Psychology——The Source and Application of Aldo Rossi's Architectural Works

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    意大利建筑师阿尔多罗西的城市建筑作品研究对今天的建筑设计存在重要的指导作用。本文通过对心理学潜意识的介绍,对罗西的具体建筑手法进行分析:面对不同的城市环境,建筑应使用有差别的设计手法,进一步产生不同的心理感受。最后立足当下,对两个当代相关建筑进行分析,希望对城市建筑的心理学手法探索与运用有所帮助。Aldo Rossi is an important Italian architect. He has an important guiding role in today's urban architectural design. Through the introduction of psychology unconscious, this paper aim to analysis Aldo Rossi's architecture work: facing the different urban environment, the method of architecture design should be changed to bring different psychological feelings. Then two contemporary architecture works will be introduced to explore the application of the method based on the present

    界面上的特异离子效应

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    结合物理化学教科书的相关章节,介绍卤化钠在固/液和气/液界面中的特异离子效应,提出在物理化学基础教学过程中应适当地结合相关领域的最新进展,拓宽学生的知识视野,更好地激发学生的学习兴趣。国家基础科学人才培养基金项目(No.J1210014
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