6,474 research outputs found

    Fabrication and Doping of Freestanding Si-O-C Composite Films by Precursor Method and Their Application in LED Devices Packaging

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    LED作为第四代光源,因其尺寸小、响应快、亮度高、节能环保等诸多优点展现出较广阔的应用前景。LED向着高功率、高密度封装的方向发展,散热问题至关重要,散热效果差导致芯片结温过高、荧光粉量子产率降低、发光波长偏移及器件老化等问题。大功率LED散热主要集中在封装材料的研究、热界面材料的选择、封装结构的合理设计及冷却系统的优化等方面。而散热基板作为其重要封装材料,要求具有高绝缘性、高导热性、高平整性以及与芯片衬底匹配的热膨胀系数等特性。因此,本文主要针对封装材料中的高热导散热基板材料进行研究,主要工作如下: 首先,先驱体聚碳硅烷(PCS)经熔融纺膜、氧化交联、高温预烧、高温烧结工艺制得自支撑硅氧碳...Light Emitting Diode (LED) as the fourth generation light source has presented several advantages over traditional light sources such as small size, fast response, high-brightness, long lifetime, energy-saving and environment-friendly. LED is also explored as one of the most outstanding solid-state light device and attracts more focuses and studies. Nowadays the power and package density of LED a...学位:工学硕士院系专业:材料学院_工程硕士(材料工程)学号:2072013115010

    Design and Implementation of Vehicle Management System of A Government

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    在行政工作中,行政后勤对各部门相关物资、环境、财务、生活等各项事务进行管理,是行政机关管理中非常重要的一环,做好行政部门后勤工作是行政办公管理有条不紊运行的关键。作为机关后勤资源管理的重要方面,车辆管理主要实现对车辆使用人、车辆自身等资源的管理和调配。随着公务派车数量的不断增加,单纯的人工管理已经满足不了事业发展的需求,因此,应用信息化技术来实现办公自动化,推进车辆信息管理,提高办公效率,更加有效地为群众、企业服务,已经成为了行政机关的一项亟待解决紧迫任务。 基于上述背景分析,本文基于MVC思想,采用VisualStudio和SQLServer设计和实现一套政府机关车辆管理系统。论文遵循软件...In administrative work, administrative logistics departments related materials, environment, finance, manage the affairs, such as life is a very important part of the administrative management, completes the administrative department of logistics is the key to the administrative office management in an orderly way to run. As an organ of logistics resource management important aspect, mainly realiz...学位:工程硕士院系专业:软件学院_软件工程学号:X201323109

    Study on the Problems and Countermeasures of Individual Income Tax Collection and Administration in China--Taking L City as An Example

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    随着我国市场经济的不断发展,社会经济建设取得了丰硕成果,居民收入随之提高,与之相关的个人所得税税收收入也连年增长。个人所得税已成为我国最具活力和潜力的税种之一,同时成为了社会关注程度最高、改革呼声最强的一个税种。然而由于我国的个人所得税征管工作起步较晚,发展还不成熟,存在诸如征管力度不到位、配套制度不健全、纳税人的纳税遵从度较低、逃税严重以及征管方式不科学等弊端,因此,个人所得税征管亟待行之有效的改革和持续不断的完善。 论文从介绍个人所得税征管相关基础理论入手,为下文的论述打下了基础;之后进行了个人所得税征管问题的问卷调查研究,对调查问卷的情况进行了说明,又对调查问卷对象的基本情况进行统计分...As China's market economy continues to develop, the social and economic construction has achieved fruitful results and the individual income increased generally, individual income tax revenues associated with growth in recent years also. Individual income tax has become one of China's most dynamic and potential taxes, as well as becoming the highest degree of social concern, one of the strongest c...学位:经济学硕士院系专业:经济学院_税务硕士学号:1552013115190

    A New Portable Platform Based on Target-responsive DNA Hydrogel and Gold Nanorods

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    即时检测(Point-Of-CareTesting,POCT)是一种能够在事发地取样、快速分析并得到准确结果的新型检测技术。裸眼检测因其结果直观、无需昂贵复杂的仪器等优点成为即时检测发展的一个重要方向。金纳米棒(AuNRs)由于局域表面等离子体共振效应(LSPR),在可见-近红外区有非常强的光谱吸收能力,且不同尺寸的AuNRs能够呈现出橘色、灰色、蓝绿色、紫红色等不同的颜色。因为人们对光谱上颜色的变化比对颜色深浅变化更为敏感,因此AuNRs的这一特性在可视化结果读取方面具有很大的优越性,基于此,我们以AuNRs作为显色底物构建了多色可视化检测平台。由于AuNRs作为多色显色底物的关键之处在于能...Point-of-care testing (POCT) is a new detection method, which can quickly get results on site. Because of intuitive results and no need of expensive equipment, naked-eye detection has become one of the most potential signal output methods for POCT. Due to local surface plasmon resonance (LSPR), gold nanorods (AuNRs) exhibit orange, gray, green, blue, purple, and other color. Since human eyes are m...学位:理学硕士院系专业:化学化工学院_分析化学学号:2052014115152

    Service Quality Management in Company A: A Six Sigma Theory Perspective

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    产品与服务质量是满足市场需求和维系组织生存发展的基本条件。质量竞争既是对市场的竞争,更是争夺客户的竞争。当今社会的价格竞争和产品质量竞争已趋于同质化,因此提升服务质量成为体现企业差异化的必然途径,服务质量竞争已经成为企业竞争的焦点。在目前的竞争环境下,服务质量管理理念不仅成为世界上众多优秀公司获得竞争优势的利器,而且成为这些公司生存和发展的文化基础。 随着近年来,中国出口增速减缓与全球海运能力过剩,世界航运市场已变为了买方市场,航运业竞争更趋激烈。货物托运人也向承运人提出更高的要求,承运人需要提供更为良好的服务,来更好地满足托运人的专业化运输需求。A公司作为典型的传统的国际集装箱运输公司,正...Product and service quality are the basic conditions to meet the market demand and maintain survival of organization. Nowadays, price competition and product quality become homogeneous. Therefore improving the quality of service has become an inevitable pathway of reflecting business diversification. Service quality competition has become the focus among enterprises. In the current competitive env...学位:工程管理硕士院系专业:管理学院_工程管理硕士学号:1772013115111

    Research on the Legal Problems of the Trust Transference of Contractual Management Rights of Rural Land in China

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    土地承包经营权的流转关乎农民的生存大计和农村社会的稳定。土地承包经营权信托的兴起与推广一方面为农村土地改革带来了契机,使农村土地的投资功能和经济价值得以激活,也为农民增加农地收益开辟了一条新途径,然而另一方面却面临土地承包经营权理论与信托理论的衔接问题,同时也给农村社会保障的问题带来了新的挑战。实践中土地承包经营权信托发展迅速,然而却做法各异,不利于信托当事人的权利保护以及信托关系的稳定,需要法律制度供给的完善以及社会配套保障机制的到位,以使土地承包经营权信托在保障农民生存权益的基础上健康有序进行。 论文第一章主要论述信托与土地承包经营权流转的关系,认为信托是土地承包经营权流转的方式之一,同...The transference of contractual management right of rural land relates to the survival of farmers and rural social stability. The emerging and spreading of trust of contractual management right of rural land on the one hand bring an opportunity for rural land reform, activating the investment function and economic value of rural land, and also opening up a new way for farmers to increase income of...学位:法律硕士院系专业:法学院_法律硕士学号:1302013115025

    Study on the Comprehensive Textbook of Cultural Factors for Teaching Chinese as a Second Language —Taking New Practical Chinese Reader Textbook (5) (6) \ Developing Chinese Advanced Comprehensive Course (Ⅰ)(Ⅱ)as Examples

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    上世纪60年代起,由于社会语言学、功能语言学、社会心理学等学科的发展,第二语言教学界发生了文化研究的转向,受此影响,上世纪80年代初我国对外汉语教学界也发起了一场关于语言教学和文化教学的大讨论,掀起了一场“文化热”。经过30余年的探索和研究,有关文化因素的定性、定位、定量的研究涌现出了很多成果,但多集中在理论层面,有关文化因素的具体分析及编写设计则较为薄弱。本文在前人研究的基础上,运用文献研究、典型案例、数据统计、描写分析等方法,以综合教材为切入点,选取了两套使用率较高的综合教材《新实用汉语课本》(5)(6)[刘珣主编.新实用汉语课本[M].北京:北京语言大学出版社,2002.]、《发展汉语》...Affected by the development of the sociolinguistics, functional lingu-stic and social psychology in the last 60’s, the importance of cultural items has been recognized already. As a result of this, a lively discussion was initiated in the Chinese TCSL field about instruction of language and culture in 1980’s. After 3o years’ research, abundant achievements about quantitative, positioning and anal...学位:教育学硕士院系专业:海外教育学院_汉语国际教育硕士学号:2652013115133

    The Research of IPC microenterprise finance

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    中小企业贷款难、融资难的问题在我国一直普遍存在,是继产业调整、体制改革后,甚至先于就业问题的重大社会问题。微小企业贷款更难,这个难从表面看起来主要是由于小额贷款业务“成本高、风险大”。其实通过合理的信贷技术,是可以解决以上的微小企业对于信贷机构来说的“不利”因素。通过近20年的小额信贷发展,从面向贫困人口,逐渐向可持续发展的、微型的小企业、个体户、农户等经济体发展,信贷技术研究也从相应的从“福利派”“向着‘商业派’”发展。我国的信贷技术伴随着我国金融体制的转变和金融理念,不断升级。德国IPC公司在微小贷款领域的成功经验,称为“IPC微贷模式”,我国2005年的“中国商业可持续微小企业融资项目”...The small and medium-sized enterprise loan and financing difficulties have been widespread in China. These difficulties are major social issues before the employment problem following the industrial adjustment and reform. There are more difficulties for small business / micro enterprise loans, which seem to be mainly due to "high cost and high risk" for small business loans from the surface. In f...学位:工商管理硕士院系专业:管理学院_工商管理硕士(高级管理人员工商管理硕士)学号:X201315623

    The Design and Implementation of BMS PDA Subsystem

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    随着国民经济的持续高速发展,尤其在商务交流和旅游业的推动下,国内的民航运输也在不断发展壮大。21世纪的今天,以计算机技术为代表的信息技术在社会各界得到日益广泛和深入的应用,促使其迅速地由生产过程自动化向企业管理信息化转变。在这种环境下,民航信息化已经成为一种众所期待的趋势。民航信息化不仅在提高服务质量和管理效率、提高公司的核心竞争力方面效果显著,更能进一步保障飞行安全。而且,随着航空公司的不断发展,外基地和外站数量持续增加,民航信息化能更好的进行集团式的数据管理。 在此背景下,本论文以具体业务需求为依托,在.NET、WinCE平台上开发出了适用于掌上端的航班行李管理系统(BaggageMan...With the sustained and rapid development of the national economy, especially in the encouragement of business communication and tourism, the domestic civil aviation transportation is also in the constant development.Today in the 21st century,computer technology, as a representative of the information technology in enterprise management, design and manufacture, is playing a huge role in the promoti...学位:工程硕士院系专业:软件学院_软件工程学号:X201323173
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