Investigation and Development of the High-Efficiency Vertical Chip

GaN基LED一般生长在蓝宝石衬底上，由于蓝宝石是绝缘体和不良的导热物质，使得传统的正装芯片在大功率下工作时，容易因散热不佳导致失效。本论文利用外延转移技术把蓝宝石衬底更换成更好的导热导电衬底，制备成薄膜垂直芯片，以利于大电流，大功率下应用。 本论文所述芯片，使用ICPdamage作为电流阻挡层，使用基板键合技术将导电导热衬底和GaN结合，然后用激光剥离方式将蓝宝石衬底去除，为了增加出光效率，对GaN表面进行粗化。 我们发现PCB-ICP条件会导致垂直结构LED在老化过程发生漏电，通过更换镜面Mir的金属及EMMI&SEM分析，发现引起老化漏电的原因来源于镜面金属——Ag迁移所致，迁移通道...As GaN-base LED is usually grown on sapphire substrate, the conventional lateral chip is normally failed to be applied in high power application for the electrical insulated and poor heat conductor. We use epi-transfer technology to transfer the sapphire to a better thermal dissipation and conductive substrate and manufacture the vertical thin-film for the high power application。 The vertical thi...学位：博士后院系专业：物理与机电工程学院_微电子学与固体电子学学号：201217004

Technological Design and Application of Cylinder-block Production Line of 4110 Series Diesel Engine

介绍了4110系列柴油机缸体生产线的工艺设计概况,缸体关键部位所采用的工艺、设备及应用效果,希望能为柴油机缸体工艺设计工作提供些许参考。This paper introduces the process design profile of 4110 series cylinder-block production line,and the key parts'technology,equipment and the effect.In the hope that some references will been provided to the diesel engine designers

CuInS_2 Quantum Dot-Sensitized Solar Cells Fabricated via a Linker-Assisted Adsorption Approach

分别以Cu I和In AC3作为铜源和铟源,十二硫醇(ddT)作为硫源,采用直接加热法合成不同尺寸的Cu In S2(CIS)量子点.运用X射线衍射(Xrd),拉曼光谱(rAMAn),高分辨率透射电镜(HrTEM),紫外-可见(uVVIS)吸收光谱表征其相结构、形貌及光学性能.结果表明:制备的CIS量子点为黄铜矿结构,且随着时间的延长,量子点逐渐长大,吸收光谱的激子吸收峰逐渐红移,表现出量子尺寸效应.采用巯基乙酸为双功能耦联剂辅助吸附法制备CIS敏化的TI O2薄膜.通过衰减全反射红外光谱(ATr-fTIr)分析得出,巯基乙酸上的羧基与TI O2表面羟基连接,另一端上的巯基代替长链的ddT与CIS耦联,将CIS成功锚定在TI O2表面.该方法不仅操作简单,而且容易实现CIS在TI O2表面的吸附.太阳电池光电性能测试表明,粒径大小约为3.6 nM的CIS量子点表现出最优的吸附能力以及光电转换性能.进一步采用连续离子吸附层法对CIS敏化的TI O2薄膜进行Cd S包覆,光电转换性能大大提高,其效率达到2.83%,这主要源于Cd S的包覆钝化了CIS的表面缺陷,有效地降低了电子复合.Colloidal chalcopyrite CuInS2(CIS) quantum dots(QDs) were synthesized using copper(I) iodine(CuI) and indium(III) acetate(In Ac3) as metal cationic precursors, and dodecanethiol(DDT) as the sulfur source and solvent.The microstructure and optical properties of the prepared CIS QDs were characterized by X-ray diffraction(XRD), Raman spectroscopy, high-resolution transmission electron microscopy(HRTEM), and UVVis absorption spectroscopy.The results showed that the CIS consisted of chalcopyrite phase and exhibited Cu-Au ordering.With prolonged reaction time, the grain sizes of the QDs became larger and the absorption edges of the CIS QDs showed a red-shift owing to the size-induced quantum confinement effect.For the first time, DDT-capped CIS QDs with narrow size distribution were connected to the inner surface of mesoporous Ti O2 films via a thioglycolic acid(TGA)-assisted adsorption approach, which was simple and easy to carry out.The adsorption behaviors of both TGA and the CIS QDs on the Ti O2 films were detected by attenuated total reflectance Fourier transform infrared(ATR-FTIR) spectroscopy.The results indicated that TGA was adsorbed onto the surface of Ti O2 via COOH groups while the ―SH group was exposed outside, and replaced DDT at the surface of the CIS QDs, leading to the attachment between Ti O2 and CIS.It was revealed that the CIS QDs of ~3.6 nm in size exhibited the best light absorption capacity and photovoltaic performance.An over-coating of Cd S significantly improved the performance of the QDSSCs owing to decreased electron recombination, and a power conversion efficiency of ~2.83% was obtained.supportedbytheNationalNaturalScienceFoundationofChina(21073193;21273241;21376195); ProjectontheIntegrationofIndustry;EducationandResearchofGuangdongProvince;China(2012B091100476); ScienceandTechnologyResearchProjectofGuangzhou;China(2014J4100218)~

SWOT Value Appraisal Approach of Venture Firms

风险企业（VentureFirm），指伴随新技术革命浪潮的高涨而产生的一批新型企业，在风险极大的高新技术产业领域进行开发、生产和经营，通常具有高风险高收益的特征。20世纪80年代以来，风险企业在全球迅速发展。随风险企业的快速发展，投资者、企业管理者及监管部门对于风险企业价值评估的准确性要求也越来越高。 然而由于风险企业经营的不确定性和高风险性，应用传统企业价值评估方法往往无法对其价值进行准确评估。为了突破传统理论在风险企业价值评估中的局限，本文尝试引入管理学SWOT分析法和AHP层次分析法，建立一种新的风险企业价值评估方法——SWOT价值评估法。这种方法综合考察各种内部因素和外部因素，寻找出...Venture Firm is a kind of enterprise which emerges with the new technology. Most of those firms develop high-tech products or provide new services which also base on high-tech. They usually run with high risk as well as high revenue. Since 1980s, these venture firms have developed very fast. Investors, managers of the company and supervisors are heightening their request of exact information about...学位：经济学硕士院系专业：经济学院财政金融系_投资学学号：1562006115107

Synthesis and Related Reactions of Fullerene Chlorides

富勒烯的化学修饰研究早在1991年经典富勒烯C60得到宏量合成后就已经开始，目前富勒烯的功能化研究仍然很活跃。 本论文从富勒烯的氯化反应开始，探索了一系列IPR富勒烯氯化物的合成条件，并首次表征了氯化富勒烯C60Cl8和C60Cl10的结构，同时在高温高压条件下得到C60Cl30的两种异构体。将这种方法应用于高碳富勒烯C76的氯化，得到具有手性的高富勒烯氯化物C76Cl34，晶体结构表明其34个氯原子以双螺旋方式加成到C76的手性碳笼上。 在合成得到的氯化富勒烯中，以产量最高、性质相对稳定的Cs-C60Cl6为代表，研究了氯化富勒烯的多种反应，并得出结论：与苯及含活泼基团的芳香烃化合物进行...Chemical modification of fullerene has been studied soon after the macroscopic synthesis of C60, and goes on to be a hot area in fullerene science. This dissertation focuses on the chlorination of fullerenes which compared with bromo- and fluorofullerenes, is much less studied. We synthesized some chlorinated fullerene derivatives C60Cln (n = 8-14, even) by controlling molar ratio of C60 and iodi...学位：理学博士院系专业：化学化工学院化学系_无机化学学号：2052006015320

Design and Implementation of LAN Chat System Based on Socket

随着计算机网络技术的高速发展，各种基于网络的应用随之诞生，比如基于互联网的通信、信息发布、数据共享等等，同时也促进局域网的迅速发展和和局域网技术的广泛应用。为了高效、快速地处理各种事务，越来越多的企事业单位使用内部局域网进行工作，特别有些企业单位为了避免内部机密通过互联网泄露，只希望员工通过内部局域网进行沟通与交流。因此，为了实现内部的通信，较好的方式是在局域网内部必建立起即时通信IM(InstantMessaging),也就是聊天系统。本文基于Socket技术设计并实现一个局域网聊天系统。 本系统基于C/S模式，采用VC++编程语言，利用面向对象的设计思想， 在Windows平台上，将客...The rapid development of the information technology brings about a variety of Web-based applications, which the computer networks is applied to all businesses and trades, such as Internet-based communication, information dissemination, data sharing, and so on. At the same time, the LAN is also developed rapidly, the LAN technology has been widely used. In order to efficiently and quickly deal with...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223028

省际文化资本存量估算与经济增长效应研究

通过构建包含文化资本的内生经济增长模型,验证文化资本对长期经济增长的影响机制。在借鉴前人研究成果的基础上,将文化以资本的形式具体量化,在永续盘存法框架下估算出中国省际文化资本存量,并证明其存在较强的空间集聚现象。实证研究表明:现阶段中国文化资本对经济增长具有显著的促进作用,但不能排除两者存在非线性关系的可能性;分区域研究表明:中部地区文化资本产出弹性最高、西部地区次之、东部地区因文化资本过度集聚反而出现不显著的情况,这意味着不仅要加大文化领域的投入,还更应该合理配置文化资本在地区间的比重,以实现全局利益最优的目标。国家社会科学基金重点项目《我国能源开发利用的升级创新机制研究》(15AZD014);;中央高校(长安大学)基本科研业务费专项资金资助项目《基于资本服务视角的公共投入效率差异对地区经济俱乐部收敛的传导路径研究》(300102238624