Optically variable characteristics research and automatic identification exploration of security thread in new RMB

光变防伪技术因其突出优点而逐渐被世界各国应用于货币防伪，人民币自第五版发行以来一直采用该防伪技术，其主要表现在光变面额数字及光变安全线上。光变防伪技术主要分为光致变色、偏振光变、衍射光变以及干涉光变，人民币采用干涉光变的方式。干涉光变利用了光学薄膜的随角异色效应，主要表现为不同角度观察下会呈现出不同的颜色。干涉光变又可分为碎膜式光变防伪和整膜式光变防伪，碎膜式光变防伪是将光学薄膜粉碎后与油墨混合制成光学变色油墨，例如2005版人民币上的面额数字；整膜式防伪是将光学薄膜镀制在PET基片上，再凹印到货币上，例如2015版人民币上的光变安全线。 光变防伪作为“一线防伪”技术很容易被人眼识别，但是对...Because of its outstanding advantages, optically variable anti-counterfeiting technology has gradually used in currency security for the world. Since 2005, the RMB has been adopting this anti-counterfeiting technology, which is mainly reflected in the optically variable denomination numbers and optically variable security threads. Optically variable anti-counterfeiting technology is mainly divided...学位：工学硕士院系专业：信息科学与技术学院_微电子学与固体电子学学号：2312014115310

Design and Implementation of Electronic Commerce Platform for Small and Medium-sized Enterprises

随着信息技术的集成化和信息网络化的不断发展，信息不仅已经成为企业发展的决定性因素，而且还是最活跃的驱动因素。电子商务是企业信息化的一个重要实现平台，利用电子商务、网络营销手段招商引资、开拓贸易是信息化发展的必然趋势。从总体上看，中国电子商务应该说还处在一个初级阶段，企业特别是中小企业对电子商务应用能力目前还相对比较薄弱。 近几年来，新疆中小企业如雨后春笋，蓬勃兴起。它以投资少，见效快，高就业，适应市场快，管理便捷等特点成为新疆经济领域的一只生力军，新疆中小企业的发展虽已取得长足进步，但仍存在诸多严重的问题。如传统信息渠道占主导地位，现代信息方式采用少等，技术进步及创新意识缺乏，研究开发投入低...Along with the information technology integration and information network development, information has become a decisive factor of enterprise development, but also the most active driving factors. Electronic commerce enterprise informationization is an important realization platform, the use of electronic commerce, network marketing, capital attraction, develop trade is an inevitable trend. From l...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023025

The Influence of the Change of External Environment on Financing Constraints——The Perspective Based on Headquarters Migrations

金融危机之后，我国面临的“中小企业融资难”的问题再次凸显，成为制约我国经济发展的问题之一。企业外部融资环境作为影响企业融资的重要因素之一，对其研究也被赋予了新的意义。 本文从我国各地区之间经济发展水平不同以及社会文化存在差异的现状入手，结合我国在2001年之后的新一轮总部迁移浪潮，并以迁移这一动态的视角对外部环境因素进行研究。选取2004-2013年之间进行总部迁移的A股上市公司作为样本，并根据迁移的方向以及地理跨度进行分组。首先以新的视角验证投资-现金流敏感性与公司融资约束之间的关系，而后分别研究了市场环境、社会文化环境的变化对公司融资约束的影响，最后分析外部环境的整体变化对公司融资约束的...After the financial crisis, the problem of financing which was confronted by middle and small-sized enterprises was highlighted and restricted the development of our country’s economy. Studying external financing condition which influenced the corporate finance, was also given a new meaning. Taking the differences of economic development level and social culture in various regions into account, ...学位：管理学硕士院系专业：管理学院_财务学学号：3212011115059

Photodegradation of dissolved anthracene and pyrene in a mixture and the effect of surfactant on the photodegradation of dissolved anthracene or pyrene

多环芳烃（Polycyclicaromatichydrocarbons,PAHs）是环境中常见的持久性有机污染物，主要由人类活动产生，可通过生物链积累，最终对人类健康造成危害。本文首先介绍了PAHs的性质、危害、来源以及天然水环境中PAHs的主要环境行为，综述了PAHs在液相介质中的光降解研究进展；然后介绍了表面活性剂的结构、性质及其应用，其中着重综述了表面活性剂在环境科学中的应用；随后介绍了荧光分析法在PAHs相关研究中的应用。在上述讨论的基础上提出了本论文的设想及研究内容，即选择蒽（An）和芘（Py）作为模型分子，利用荧光分析法考察溶解态混合组分An和Py在水、人工海水（Simulated...Polycyclic aromatic hydrocarbons (PAHs) are common persistent organic pollutants that are mainly produced by human activities in environment. They pose a potential threat to human health through bioaccumulation via food chains. In this dissertation the properties, hazards, sources and dominant environmental behaviors of PAHs in aquatic environment were presented firstly. Secondly, photodegradation...学位：理学硕士院系专业：海洋与环境学院环境科学与工程系_环境科学学号：2122005130221

A Research on Improvement of Salary System For SZ Company

薪酬体系是现代企业管理制度的重要组成部分。薪酬体系是否科学、合理和具有激励性，直接关系着企业员工的积极性和公司竞争力的提升，同时也对企业的生存和发展有着深远的影响。因此，科学合理的薪酬体系设计，是企业吸引、留住和激励员工，实现公司人力资源战略的重要环节，也是企业实现整体发展战略的一项迫切任务。 本文以SZ公司薪酬体系的改进设计为研究对象，运用现代薪酬设计的相关理论，首先分析了该公司薪酬现状和现行薪酬体系存在的问题。其次，以促进公司转型发展、创新发展和跨境发展为目标，在对公司所在的证券行业外部薪酬水平调查的基础上，结合企业实际，从固定薪酬和浮动薪酬两方面，分前台部门（业务部门和研发部门）和中后...Salary system is an important part of the modern enterprise management system. It is directly linked with employee’s motivation which enhances enterprise’s competitiveness and has to be set up in a scientific, reasonable and incentive way. It strongly influences the survival and development of a company. Therefore, to establish scientific salary system is the key part for strategic human resources...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：1792011115094

Early Termination of BCH Codes Aided Iterative Decoding Algorithm for LDPC

在传统的卫星广播系统中,信道纠错通常采用bCH码级联ldPC码的方案以达到良好的误码率性能,例如dVb-S2系统。作为内码的ldPC码通常采用迭代译码,且迭代次数较高才能实现比较好的系统性能。借助bCH级联ldPC的结构,文中提出了将bCH检错嵌套进ldPC每一次迭代译码过程中的新的迭代译码结构。仿真结果表明,新算法以较低的bCH码检错运算复杂度换取了ldPC码迭代次数的明显下降,从而极大降低了迭代译码总体复杂度和译码时延,且整体纠错性能与原始ldPC译码后bCH纠错的算法相比基本保持不变。In conventional satellite broadcasting systems,e.g.DVB-S2,the error-correction schemes are often based on the concatenation of BCH and low-density parity-check(LDPC) codes,so as to obtain excellent bit error rate(BER) performance.As the inner codes,LDPC codes are traditionally decoded by iterative algorithms with many iteration cycles.In virtue of the concatenated structure of BCH and LDPC codes,a novel iterative decoding structure involving the embedment of BCH error-check function into each iterative cycle of LDPC is proposed.Computer simulations show that the iteration number of LDPC decoding with the proposed algorithm is obviously smaller than with traditional algorithm,thus greatly lowering the additional complexity of BCH error-check codes.Therefore,the total complexity and latency of the iterative decoding could be sufficiently reduced,while the similar system BER performance is maintained

EFFECTS of SURFACTANTS ON PHOTODEGRADATION of DISSOLVED ANTHRACENE

本文利用荧光法研究了表面活性剂十二烷基硫酸钠(SdS)和聚氧乙烯月桂醚(brIJ35)溶液以及水溶液中蒽(An)的光降解,初步探讨了brIJ35溶液中An的光降解机理.结果表明,An在不同表面活性剂胶团中的增溶位点不同,对其光降解的影响显著.实验证实An在brIJ35溶液中的光降解是一个由激发三重态发生且无自由基产生的过程,与其在水溶液中的光降解机理一致.The photodegradation processes of anthracene (An) in aqueous solution with or without the surfactants,such as SDS or Brij35 were studied by fluorimetry.The preliminary photodegradation mechanism of An in Brij35 solution was also investigated.The results showed that the location where An resided in micelles of surfactants remarkably influenced the photodegradation process of dissolved An in surfactant aqueous solutions.The mechanism of An decomposition started by excited triplet state of An but without radicals involved in Brij35 solution.It is quite similar to the photodegradation mechanism of An in aqueous solution.国家自然科学基金(No.20577037;20777062);高等学校博士学科点专项科研基金(200803840015