351 research outputs found

    Investigations on the microstructures and properties of Cu–Al–Mn–(Cr, V, Ti)shape memory alloys

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    摘要 Cu–Al–Mn基形状记忆合金具有良好的塑性和形状记忆性能,且成本低并易于切削加工,因此具有极其广阔的应用前景。然而,Cu–Al–Mn基形状记忆合金的临界应力以及疲劳强度都比较低,阻碍了其更多的发展应用。本论文采用合金化方法以Cu–Al–Mn合金为基体,分别添加了Cr、V和Ti元素,制备了Cu–Al–Mn–Cr、Cu–Al–Mn–V和Cu–Al–Mn–Ti三个体系的合金,并逐步采用金相、EPMA、XRD、DSC、压缩、TMA等测试方法,对各合金体系的微观组织结构、相变特性、力学性能和形状记忆性能进行了系统的研究。主要结论如下: (1)Cu–Al–Mn–Cr系合金具有可逆的马氏体相变,...Abstract Cu–Al–Mn-based SMAs have been applied in several practical applications for the advantages of easy fabrication, good shape memory properties and low manufacturing cost. However, the critical stress for stress-inducing martensitic transformation and the fatigue strength of Cu–Al–Mn SMAs are very low, which limit their further practical applications. In this study, three types of C...学位:工程硕士院系专业:材料学院_工程硕士(材料工程)学号:2072014115013

    Key Technologies And Application Research Of Control And Real-time Monitoring Tasks In Smart Home Web Of Things

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    随着移动互联、云计算等技术的发展以及人们生活水平的提高,近年来智能家居市场获得长足发展,出现了大批新型产品,越来越多的用户通过智能设备无线接入互联网,实现内容的获取及相互之间的交互,一定程度上满足了大家的需求,但还普遍存在实时特性差、对于Web支持有限、大量使用私有协议或底层协议、标准兼容性低、设备互联互通困难的问题。 本课题针对智能家居中的两类典型应用场景,将Web协议和架构引入物联网领域,构建出具有开放性和松耦合特性的智能家居物维网(WebofThings,WoT)应用架构,研究工作取得以下创新点: 1.构建了一种不依赖于操作系统的嵌入式REST服务器,将智能家居的各类操控建模为资源表...With the development of mobile Internet, cloud computing and other technologies as well as the improvement of people's living standards, in recent years, the growth of smart home market is substantial, there are a large number of new products be shown for customers, more and more users use smart devices to wireless access the Internet to achieve contents and interaction between users which meet pe...学位:博士后院系专业:信息科学与技术学院_信号与信息处理学号:201317008

    Research on the Application of Interactive Digital Image Design in Public Information Communication: Using Catering Advertisement as An Example

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    互联网时代的到来以及计算机智能软硬件的普及,使得我们接触到的文字信息日趋减少,人类已经慢慢地从通过文字获取信息跨越到从图像、声音、感知的多维空间中了解世界。在视觉时代背景下,作为一个全新的设计语言,相比于单纯的文字和图片的简单组合,数字影像具有更强大的唤起能力。随着数字技术的日趋成熟和大众审美水平的提高,人们不再满足于被动接受信息的受众角色,而是渴望在参与和互动中获取信息的同时成为信息的传播者。由于大众对获取信息主动性的追求,数字影像的可交互化设计功能得到越来越多的重视并广泛运用到信息传播的各个领域。 本论文从分析公共信息传播方式的演变出发,探究了公共信息传播走向可交互数字影像时代的发展原因...With the advent of Internet and the popularity of computer intelligence, we have less access to the text information. Human beings have slowly understood the world from images, sound and perception of the multi-dimensional space instead of the text. In the visual age, as a new design language, comparing to simple combination of text and pictures, digital images are more powerful to evoke. With the...学位:艺术学硕士院系专业:艺术学院_设计学学号:1862014115362

    A Post-colonial Perspective of The Good Earth

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    《大地》以二十世纪初的中国社会作为背景,讲述了王龙一家在各种灾难中挣扎抗争的故事,它真实地反映了中国农村的面貌以及人与土地的密切关系。本文采用后殖民主义理论视角,从《大地》的主题、女性地位以及生活文化等方面分析作品的后殖民主义特征,并从赛珍珠的双重文化身份探究了她创作的动机,最后指出《大地》是传播中国文化的伟大作品,它架起了中西方文化交流的桥梁。With the early twentieth century's Chinese society as the background,The Good Earth describes how the family of Wang Lung struggle to fight against numerous disasters,truly reflecting the reality of Chinese rural areas during that period and illustrating the close bond between human and land.By using post-colonialism,this paper intends to analyze post-colonial features manifested in The Good Earth,including the themes,the status of women and the traditional customs.Meanwhile,the writing motive of Pearl S.Buck is examined from exploring her dual cultural identity.Finally,it restates that The Good Earth is a great work to spread Chinese culture and serves as a bridge between the East and the West

    A Study on Internal Control Evaluation System of Off-site Branch of Bank X

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    在全球经济一体化、自由化的过程中,金融风险急剧放大,作为金融业主体的商业银行,经营目标日趋多元化导致缺乏足够的资源有效应对金融风险。因此,健全有效的内部控制已经成为商业银行防范风险最重要的一道防线。结合作为第三道防线的内部审计理念,建立并完善内部控制评价体系,对保护商业银行资产完整性、保障资源流动性和保护经营合规性等方面具有重要的意义。 本文选择X银行的异地分支机构内部控制管理状况作为切入点,采用实证研究法和对比分析法,从内部审计的视角出发,试图完善X银行内部控制评价体系,以解决内控评价得分难以真实反映异地机构内控管理水平的问题。 本文首先对X银行异地分支机构的内部控制环境、管理现状和管理...In the process of financial liberalization and economic globalization,financial risk amplified rapidly. Because of the diversification of the manage goals, Chinese commercial banks, as the financial main body, haven’t input enough resources to adapt to the new risk management. So the effective internal control management has already become to the first defense line for commercial banks guarding ag...学位:管理学硕士院系专业:管理学院工商管理教育中心(MBA中心)_工商管理硕士(MBA)学号:1792009115087

    Investigation on bone cell-biomaterial interaction by biochip techniques and in-situ physicochemical methods

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    现代微系统技术及各种原位物理化学方法,为生物表面/界面的研究提供了前所未有的机遇和全新的研究层次。本工作致力于应用发展的微流控和微电极阵列(MEA)生物芯片、原子力显微镜(AFM)、电化学阻抗谱(EIS)和衰减全反射傅立叶红外光谱(ATR-FTIR)等先进技术,从不同的侧面和层次研究骨细胞与生物材料相互作用过程及机制。 主要研究内容有:(a)建立昆明小鼠的原代颅骨成骨细胞和长骨骨髓基质干细胞(rMSCs)的培养,并应用于新型复合生物材料的研究;(b)考察微流控生物芯片中流体状态(静止和流动)对人类骨髓基质干细胞(hMSCs)成骨分化的影响;(c)应用微加工技术制备微图案化的表面薄膜,应用AF...Microsystems and in-situ physicochemical methods are providing new opportunity and different sides in understanding of biological interface. The emphases of this thesis are to study bone cell-biomaterial interaction, by developed microfluidic chip, microelectrode array (MEA) chip, atomic force microscopy (AFM), electrochemical impedance spectroscopy (EIS) and attenuated total reflectance fourier t...学位:理学博士院系专业:化学化工学院化学系_物理化学(含化学物理)学号:B20042502

    A Development Study of Fujian Time-honored Brands

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    中国在与世界经济接轨的同时,塑造了一批具有中国特色的老字号,如福建福州的“郑兴利”剪刀、“许顺兴”锣鼓、“同利”肉燕、“聚春园”佛跳墙、“鼎鼎”肉松、“大福星”鱼丸;福建厦门的“鼓浪屿”馅饼、“黄金香”肉松……等品牌。但光阴荏苒,岁月流转,再提起这些老字号时,人们只能记起它们曾经有过的辉煌,如今,它们有的风光不再,有的步履蹒跚,有的销声匿迹……时间成就了老字号,时间也让不少老字号黯然失色。 面对福建老字号发展的严峻形势,鉴于福建老字号“经济价值和文化价值的统一体”的特殊身份,本文首先客观地调查分析了当今福建老字号的品牌困境,并以福州、厦门两地市为例,进行深入研究与探讨,希望本文能为有关机构重...A great number of China Time-honored Brands had been set up when China’s economy was being in line of global economy. These brands exhibit this national characteristic, and Fujian Time-honored Brands also show the spirit of Fujian Province. In Fuzhou, there are Zheng Xingli Scissors, Xu Shunxing Gong and Drum, Tongli Meat Yan, Ju Chun Yuan Fotiaoqiang(Steamed Abalone with Shark Fin and Fish Maw in...学位:新闻与传播硕士院系专业:新闻传播学院广告学系_传播学学号:X200610400

    The Relevance Between Corporate Governance and Correction Bulletins for Annuals

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    内容摘要近年来,我国证券市场上颇为频繁的出现着年报“打补丁”的现象,即上市公司在年报发布之后,以临时公告的形式再对其做出更正或补充,而年报补充更正公告通常都表明了先前已经发布的年报中存在着错误或遗漏,更为严重的是,年报补充更正公告可能是上市公司管理者的故意行为——管理层借助这一手段来延缓不利信息的披露时间。实际上,无论哪种情况,“补丁”公告都降低了会计信息的披露质量。公司治理与会计信息披露之间存在着密切的关系,其完善程度制约着会计信息披露的质量,完善的公司治理结构可以减少年报补充更正公告发布的几率,进而提高会计信息披露质量。本文共分为四个部分:1.对国内外学者关于财务重述、“补丁”公告的研究现...Abstract In recent years, the “patch” of annals frequently arose. Listed companies often make supplement or correction to the financial statement they just released. The emergency of complementarity and correction bulletins usually means that there are possible error or neglect in the originally annals, and even badly, it sometimes becomes a good choice of managers to delay the disclosure of ne...学位:管理学硕士院系专业:管理学院企业管理系_企业管理(含财务管理、市场营销、人力资源管理)学号:2005130120

    The Feasibility Study on Rising Block Pricing: The Case of Henan Province

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    在我国电力行业进行市场化改革的进程中,居民用电一直处于受保护的状态。长期以来,居民用电采用的都是统一的定价模式,其平均价格也大幅度低于供应成本,而长期低电价一直是通过工业用电和商业用电的高电价来补贴实现的。在这种模式下,收入水平高且往往用电较多的家庭得到了更多的用电补贴,而收入水平低、用电少的家庭只能得到很少的补贴。这不仅导致了分配格局的不公,也与很多发达国家的情况不一致。同时,为了补贴居民用电而继续提高工、商企业的用电价格也是不现实的,因为这不仅会提高我国工业企业的生产成本,降低企业的竞争力,也会削弱我国吸引投资的能力。因此,尝试新的居民用电定价模式成为了我国电力改革的一个主要方向。而在现有...In the process of market reform of China's electricity power industry, residential electricity consumption has always been in protected status. Over the years, residential electricity is priced in a uniform pattern and the average prices are substantially lower than their costs. The gap has been in the long term filled through high prices of industrial electricity and commercial electricity. In th...学位:经济学硕士院系专业:经济学院经济研究所_产业经济学学号:2902007115041

    浅述中外个人金融业务之比较及发展战略

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    目前,我国商业银行把拓展个人金融业务作为其业务发展的重要组成部分,且竞争越来越激烈。虽然有大幅改革,但是与成熟的外资银行相比,差距仍然很大。国内商业银行在发展个人金融业务过程中,应吸取经验,加大改革力度,以迎接国际竞争
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