Research on introduction of Smart Beta products in A-Share Market ——Based on the empirical research of A-share Smart Beta Indexes

指数并不特指具有特定编制方法的指数，其主要是通过对传统市值加权指数在选股和权重分配方面进行优化，在指数化管理的同时，力求相比传统市值加权指数能够产生超额收益，它代表的是对传统投资理念和指数投资理念进行融合的趋势。虽然国外发达市场SmartBeta产品已初具规模，但国内仍处于起步阶段，占指数类产品的整体规模偏低，如何借鉴海外经验并基于A股实践，筛选符合现阶段国内投资者偏好的SmartBeta指数进行产品开发已成为当下国内资产管理机构面临的重大机遇。本文首先梳理指数化投资的理论演变过程，并介绍指数基金的基本概念、分类与评价体系。紧接着分析国内外市场指数产品，尤其是SmartBeta产品发展的历史与...the fusion trend of traditional investment theories and Passive index investment. Although Smart Beta products have taken a significant proportion of index products in overseas market, they are still in their infancy stage in domestic market. How to learn from overseas counterparts and develop some suitable Smart Beat products in accordance with the present stage of A-share market has become a big...学位：工商管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792013115077

Structural Studies of Nuclear Receptor Nur77 Dimerization

核受体超家族是一类进化上相关并且能够与特定的DNA片段相互结合的转录因子。隶属于这一超家族的孤儿核受体Nur77，在各种不同刺激的诱导下，调控细胞生长、分化、凋亡，并在生物体发育的过程中发挥重要的作用，近年来已经成为一个重要的潜在药物靶点被广泛地研究。典型的核受体在受到特定的刺激下，若与相应配体结合，会以其配体结合结构域(LBD)为主发生同源或异源二聚化，并通过与DNA上被称之为应答元件的特定序列结合，发挥转录激活的生理功能。Nur77能够以单体、同源二聚体、异源二聚体三种方式分别与相应的应答元件结合，然而其具体的二聚化机理尚未被揭示。 第一个部分的研究中，我们研究已经被本实验室解析、具有高...Nuclear receptor superfamily consists of transcription factors that are evolutionarily related and can interact with specific DNA fragments. As a member of this super family, orphan nuclear receptor Nur77 participate in regulation of cell growth, differentiation, apoptosis under various stimuli and play an important role in development process. In recent years, Nur77 becomes a widely studied poten...学位：理学硕士院系专业：生命科学学院_细胞生物学学号：2162011015394

Body Type Consciousness and Its Relationship to Purchasing and Wearing Behavior of Clothing : Comparison between Korean and Japanese Female Students [Part I] : Body Type Consciousness Seen in Korean and Japanese Female Students

This paper examines the difference between Korean and Japanese female students in thelr body type consciousnesses. A questionnaire surveywas conducted for this purpose. The number of valid replies was 484.The results are as follows:(1) With respect to body size, Korean female studentsshow a tendency to be taller, heavierand larger waisted.(2) Female students both of countries are generally dissatisfied with their body types. Some significant differences were, however, found between them. Japanese female students are more dissatisefied with their figures, upper bodies and faces than Korean female students. While Korean female students are more dissatisfiedwith their heights.(3) Generally there was a wider gap betweenthe real body type and the ideal body type in Japanese female students. With respect to lower body, students of both countries feel a great gap betweenthe ideal and the real

渤海典型生态灾害的发展变化特征及演变趋势

渤海是中国的内海,受海岸带地区人为活动的影响,海域生态环境退化严重,其主要表现为海洋生态灾害频发。本文对渤海近年典型生态灾害,如赤潮、大型藻类及水母发生的时空分布特征进行了总结,结合水环境变化,对其演变趋势进行了评估,并提出了相应的防控应对建议

FPGA-based hardware design for scale-invariant feature transform

[[abstract]]This paper proposes a novel hardware design method of scale-invariant feature transform (SIFT) algorithm for implementation on field-programmable gate array (FPGA). To reduce the computing costs, Gaussian kernels are calculated offline for use in Gaussian filters. To eliminate low-contrast points, the inverse of a Hessian matrix is required for hardware implementation, which results in poor performance because dividers are needed. To solve this problem, this paper presents a new mathematical derivation model to implement the low-contrast detection, avoiding the use of any dividers. For the implementation of the normalization module, a large number of dividers are required by traditional methods, which adversely affects the computational efficiency. This paper presents a new architecture using only one divider to implement the normalization function in hardware. Thanks to the parallel processing architecture proposed to design the image pyramid, SIFT detection, and SIFT descriptor, the computational efficiency of the SIFT algorithm is significantly improved. As a result of the proposed design method, the requirement of logic elements in the FPGA hardware is greatly reduced and system frequency is significantly increased. Experimental results show that the proposed hardware architecture outperforms existing techniques in terms of resource usage and computational efficiency for real-time image processing.[[notice]]補正完

Development and Clinical Trial of a High-Sensitive and Broad-Spectrum Immunoassay for Hepatitis B Surface Antigen

我国由于HBV感染者众多，存在一定比例的低病毒载量的无症状携带者及感染早期的带毒者；而其也成为了HBV输血后传播的主要来源，这种情况无疑对HBsAg诊断试剂的灵敏度提出了更高的要求。同时，众多的感染者也为突变毒株的出现提供了温床；尤其是近年来乙肝疫苗、免疫球蛋白及核苷类药物等的广泛应用更加快了HBsAg突变株尤其是“a”表位突变株的出现。而传统的HBsAg诊断试剂主要采用针对“a”表位的特异性抗体，对突变毒株的检出能力有限，加之部分突变株不能被现有疫苗保护，从而给临床诊断和血液安全带来巨大威胁。当前欧美推出的一些改进型HBsAg检测试剂已经能检出部分HBsAg突变株，但是其检测灵敏度与检测野生...China is a high-endemic area of HBV in which there are many AsCs with low viral load and newly infected persons in the window phase who are the main source of transfusion- transmitted HBV. Consequently, HBsAg assays with higher sensitivity need to be developed to overcome this problem. Meanwhile, such a vast number of infected individuals are reservoirs of HBV mutants. Moreover, under the influenc...学位：理学硕士院系专业：生命科学学院生物医学科学系_细胞生物学学号：2162007115191

Research on Ambiguity grade of the Noun in Modern Chinese

歧义度是本文的核心论题，我们对其理论背景、定义、计算方法和影响因素做了系统论述。歧义度源于计算机词义消歧，词义消歧指用计算机自动给多义词标注一个确定的义项，是自然语言处理领域一个十分重要又十分困难的课题，也是当前研究的热点问题。我们注意到不同多义词的消歧结果差异巨大，有的多义词可以轻易得到很高的消歧正确率，有的词则难以实现。多义词这种体现在词义消歧难易程度的差异是由其内在语义属性决定的，这种内在属性就是歧义度。 在词汇语义学视角下，歧义度可以看做多义词的一个客观状况，它体现多义词义项间组合关系差异大小，在更深层次上体现了义项间语义关系亲疏远近的差异，多义词义项组合关系趋同则其歧义度高，反之就...Ambiguity grade is the core topic of this article. In the research, we systematically discussed and analyzed its theoretical background, definition, calculation methods and influence factors. Ambiguity grade derives from computer word sense disambiguation which means automatic sense tagging to polysemous words by computer. We note that there are huge differences of disambiguation results among dif...学位：文学博士院系专业：人文学院中文系_汉语言文字学学号：1022008015038

Biochemical Identification and Phylogenetic Analysis of Haloalkane Dehalogenases in Alcanivorax

摘要 柴油食烷菌AlcanivoraxdieseloleiB-5T是本课题组分离鉴定的一株重要的石油降解菌，具有潜在的环境意义和生物学意义。实验发现柴油食烷菌B-5能够利用多种卤代烷烃为唯一的碳源和能量来源进行生长。 1．柴油食烷菌B-5中的HLDs基因克隆表达与酶学特性分析 本文中表达、纯化了柴油食烷菌B-5中的两个推定的HLDs，DadA和DadB；检测了这两个酶的底物范围和酶活特性；测定了DadB的稳态动力学常数、最适温度和最适pH；使用动态光散射技术分析了DadB在不同pH的溶液中的稳定性；通过同源建模研究了DadB酶学特征的结构学基础。 DadA在已鉴定的HLDs中具有最严格...Abstact Alcanivorax dieselolei B-5T is an important oil degradation bacteria strain isolated and identified by our group and has potential meanings in environmental improvement and biological study. Carbon source experiments showed A. dieselolei B-5 can use a variety of halogenated alkanes as sole carbon and energy source for growth. 1. Cloning, expression and enzymatic analysis of HLDs in A. di...学位：理学博士院系专业：生命科学学院生物化学与生物技术系_生物化学与分子生物学学号：2172008015042