561 research outputs found
The Research on the Performance and Preparation of High Temperature Lanthanum Doped Molybdenum Wire for Automotive Lamps
作为汽车灯用导杆,钼与玻璃封接是一项很特殊的应用,被用于不同封接方式的钼导杆,对其质量与性能有不同的要求。 钼导杆表面质量、裂纹及高温性能是玻璃封接过程需要控制的三个关键参数。例如,钼导杆与石英玻璃封接要承受将近1700℃的封接温度,这就要求钼导杆具有良好的高温性能;当它与硬质玻璃封接时要钼导杆贯通灯体,这就要求材料表面不能存在缺陷及裂纹,以达到密封完好、不漏气。 本文对汽车灯用高温钼镧丝的制备工艺及性能进行研究,并建立了工艺控制规范和产品标准。本研究工作和取得的成果主要包含以下几个方面: 首先,进行了钼丝再结晶温度研究,得出钼镧丝的再结晶温度范围在1550~1800℃左右,用起始再结晶...As automotive lamp guide bar, molybdenum wire indicated a very special application when they were sealed with the glass. It is well known that different using of molybdenum sealing guide rod had different quality and performance requirement. Surface quality, splits and high temperature performance are the key quality characteristics and determining factor of the molybdenum guide rod when they wer...学位:工程硕士院系专业:材料学院_工程硕士(材料工程)学号:X201219302
Analysis of chromosomal karyotypes in cases of cytogenetic counseling and leukemia disea
目的:应用染色体分析技术对厦门地区的遗传咨询者以及白血病患者进行染色体核 型分析,以了解厦门地区染色体病发生状况、对优生优育工作提供实验依据以及通过染 色体核型分析对白血病患者的诊断、治疗和预后提供实验依据。方法:对遗传咨询者采 用外周血淋巴细胞培养法,对白血病患者采用骨髓细胞短期培养法,G显带。结果:2005 年至2008年厦门地区遗传咨询者染色体病发生率为19.11%。其中,不良孕产组的染色 体异常率为7.77%;性发育不良组的染色体异常率为25.28%;智力低下组的染色体异常 率为47.76%;因家族遗传病史而排除染色体病组的染色体异常率为13.63%。较1990年 至20...Objective: Analysis chromosomal karyotypes in cases of cytogenetic counseling and leukemia disease ,in order to improve fertility or help to diagnosis、therapy and prognosis of disease in Xia Men.Methords: Chromosomes were prepared after 72 hours culture of blood or 24 hours culture of marrow.G-banding was used to analyze karyotypes.Results:Abnomalities frequency was 19.11% in cases of cytogenetic...学位:理学硕士院系专业:生命科学学院生物学系_生物化学与分子生物学学号:20052600
A Political and Economics’ Analysis on Carbon-Tariff Measures
21世纪以来,在世界金融危机、全球气候变暖的背景下,欧美等发达国家争相推出基于碳的边境税措施,旨在对那些没有实施强制性减排国家的高能耗、高排放商品征收碳关税。碳关税的提出迅速引起了世界范围的关注,各国观点不一,颇有争议。欧美等发达国家以公平竞争、碳泄露等原因积极推动碳关税的征收;相反,以中国、印度为代表的发展中国家则普遍认为该措施是一项以保护环境为借口的新贸易壁垒,对此表示强烈反对。 本文基于碳关税提出背景及概念的分析上探索碳关税的合法性。目前,WTO并没有给碳关税的性质作一个明确的解释,其本质及合法性依然是一个非常模糊的命题,各国对此争论不已。本文对WTO相关规则进行研究分析,认为碳关税的...Entering into 21st century, under the background of worldwide financial crisis and global warming, the European and American developed countries propose carbon-motivated border tax adjustment, levying carbon tariffs on imported high energy consumption and high emission goods from the countries which don’t implement compulsory carbon emission limits policies. The proposition attracts attentions fro...学位:经济学硕士院系专业:经济学院国际贸易系_国际经济学学号:1572009115162
Research on Interactive Relation between Natural Disasters, Society and Economy in Jianghuai Region
中文提要自然灾害是指自然力对人类社会造成的损害。明清时期江淮地区的自然灾害主要包括水、旱、蝗、潮、瘟疫、地震、大风、冰雹、雪灾和低温霜冻等。本文以灾害为切入点,试图对明清时期的自然灾害与江淮地区社会经济互动过程作一系统而深入地考察,以冀对丰富历史研究内容以及今天江淮地区的社会经济发展和防灾减灾大有裨益。全文以灾害的生成与人类的应对为主线,分置七章。第一章论述明清时期江淮地区的生态环境和人文环境。自然灾害的发生是自然这一外营力作用于人类社会的过程,是自然因素和社会因素共同作用的结果。一方面,江淮地区过渡性的地形、气候、水系是造成该地区多灾的重要自然地理因子。而南宋以来的黄河夺淮又扰乱了江淮地区的...ABSTRACT Natural disaster refers to damage brought by natural forces to human society. In Ming and Qing dynasties, natural disasters in Jianghuai Region (the area between Yangtze River and Huai River) included flood, drought, disaster brought by locusts, plague, earthquake, gale, hale, heavy snow, and unexpected frost. With natural disasters as a starting point, the author of th...学位:历史学博士院系专业:人文学院历史系_专门史学号:B20010200
The Analysis of the Volatility and Relevance of Chinese Stock Index and American Stock Index Under The Financial Crisis
美国次贷危机所引发的全球金融危机,席卷全球,各大市场摇摇摆摆,不但金融市场受到冲击,而且直接冲击了实体经济。美国次贷危机影响深远,其引发的全球金融危机现在成为街谈巷议的热门话题,不但民众热衷于谈论,政府部门更是积极应对,采取多种措施进行预防危机的进一步扩大及危机对经济的更大更具破坏性的冲击。覆巢之下,焉有完卵,在经济化全球化的今天,无论是发达国家还是发展中国家,也无论是新兴市场经济国家还是转型国家,只要是世界经济体系中的一员,这次金融海啸对于它们的影响都是深远的,冲击都是巨大的。经济的发展,伴随着资本市场的繁荣,在华尔街金融危机下,世界股票市场波动加剧,风险加大。 笔者选取中美两国间的重要股...The financial crisis which caused by the subprime mortgage crisis is sweeping up the world。The chief stock markets are shocked by the crisis badly. Not only the finance is damaged badly , but also the real economy is very bad. The crisis of the finance has a far-reaching consequences. Now , the finance crisis is becoming the hot topic by the people , and the government is managing to take measures...学位:经济学硕士院系专业:经济学院金融系_金融学(含保险学)学号:1562006115101
Design and Implementation of Gui Zhou ATMB OA System
地处西南的贵州省风景优美,非常适合旅游业的发展。随着航班量日益增加,负责空中交通管制任务的民航贵州空管分局的日常工作量也在增加。以往的纸质办公模式已无法紧跟这一趋势的变化,于是需要研究开发一套协同办公系统。这套系统旨在提高民航贵州空管分局的日常工作效率,且以办公业务为基础,满足该分局的实际需要。以下是本文主要分析和研究的各项内容。 1、本文主要介绍了该课题的研究背景和意义,指明了电子政务的优点和缺点,并结合国内外的发展情况,介绍了IBMLotusDomino开发平台。同时,指明了民航贵州空管分局的五点业务需求:即个人办公,信息服务,公文管理、综合管理和系统管理。 2、以Domino群件系统...Guizhou province is located in the southwest of china. The scenery in Guizhou province is beautiful and very suitable for the development of tourism. With the increase of flights, the daily work of Guizhou Air Traffic Management Sub-bureau (ATMB)which responsible for the air traffic control is increasing. The traditional paper-based office model has been unable to keep up with the change of this t...学位:工程硕士院系专业:软件学院软件工程系_工程硕士(软件工程)学号:X201223085
The Research of Marketting Sale's Tactics For PS Sheet In Chinalco
随着中国市场经济体制改革的进一步深化,各行各业的竞争逾演逾烈,作为印刷用PS版基市场更是如此。该产品是属于铝加工板块中技术含量较高的品种,不仅是一个资金密集型产品,还是一个必须具备较高技术工艺水平的产品。 在20世纪90年代以前,我国印刷行业所使用的印刷用PS版基主要被德国、日本等发达国家的企业所垄断。90年代以后,随着中国铝加工行业的技术进步和设备更新,有为数不多的中国企业,如中国铝业公司下属的中铝西南、中铝瑞闽可以生产该产品,这在一定程度上冲击了进口产品的垄断经营。这些企业为民族工业的发展起到积极的作用,而且在价格上很有竞争优势,产品供不应求,具有较高的附加值。 进入21世纪以来,随着...With the deepening of the marketing economic system innovation in China, the competition in all fields is very acuity. So is the PS sheet market. This product is the high-technical required in the aluminium process, not only huge amount needed, but also high-grade technical supported. Before the nineties of the zoth century, this market was controlled by the developed country such as Germany a...学位:工商管理硕士院系专业:管理学院工商管理教育中心(MBA中心)_工商管理硕士(MBA)学号:X20021545
The Mechanism of the Group of Seven’s Macroeconomic Policy Coordination and Its Evolution
随着经济全球化程度的日益加深以及国际金融市场的迅速发展,各国之间的经济联系日益紧密,宏观经济政策的溢出效应也愈加明显。一方面,一国或地区的宏观经济政策与其他国家或地区宏观经济的联系日益紧密,这增加了各国宏观经济政策的执行难度,客观上要求各国之间进行政策协调。另一方面,当发生系统性的冲击比如金融危机时,任何一国都无法单独处理这一情况,而必须与其他国家联合起来,进行宏观经济政策协调,以共同应对冲击。 协调的收益是政策制定者们决定协作的基础,国际经济政策协调的效果如何,为提高政策协调效果应采取怎样的协调方式等问题得到理论界的广泛关注。实际问题刺激产生了大量的理论研究和应用研究,以试图分析和估计政策...With deepening economic globalization and the rapid development of international financial markets,spillover effect of the macroeconomic policies between different countries has become more and more apparent. On one hand, the fact that a country’s macroeconomic policies would not only effect its own economy but also effect other countries’ through international trade and capital mobility increases...学位:经济学硕士院系专业:经济学院国际贸易系_世界经济学号:1572007115079
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