Market reaction to non-tradable share desterilization:An explanation based on liquidity shifts

从2006年6月19日第一笔股改限售股解禁事件开始，股改限售股解禁己渐渐成为全社会关注的焦点。从宏观层面看，限售股解禁将给我国资本市场带来什么冲击？从微观层面讲，不同公司限售股解禁的市场冲击会相同吗？本文试图从流动性的角度来分析这些问题。 理论上，资本市场中存在流动性溢价现象。如果股票流动性低，投资者应该会为持有流动性不佳的股票而得到补偿。大多数的实证研究都证明了流动性是影响股票预期收益率的一个重要因素。因此，本文研究的主要目的就是希望能够找到流动性变化和限售股解禁的累计异常收益率之间的相关关系。 本文的研究分两个部分。第一部分用事件研究法对本文选择的2624个解禁样本进行分析。一方面，回...Since the first non-tradable shares became tradable on June 19, 2006, the desterilization of non-tradable shares came to our sight gradually. Questions such as what impact the selling off would bring to the market and whether the react would be different among different individual company. This thesis tries to answer from the prospective of liquidity shifts. Theoretically, liquidity premium exist...学位：经济学硕士院系专业：经济学院金融系_国际金融学学号：1562007115147

1,2-二苯基乙二胺及与脱氢乙酸缩合生成的席夫碱化合物对映体的高效液相色谱法拆分

福建省自然科学基金资助项目(C0510001

ECC testing platform based on layering principle

纠错技术是现代通信系统不可缺少的技术,针对目前纠错码测试可重构性要求高和测试数据量大的特点,提出了一种针对纠错码的基于分层原理的软硬件联合测试平台。采用分层的设计结构,使得该平台具备高度的可重构性,能够在不同纠错码测试之间进行迅速重构。利用高速的PCI数据采集卡PCI-7300A在PC和fPgA之间进行数据传输,并在PC和fPgA端对数据进行分层封装和添加校验与确认—重传机制,以此保证数据高速、顺序、无差错地传输。通过利用该平台对多进制ldPC码进行测试,结果表明,在传输时钟为20MHz的时候,平台吞吐量达到446.83MbIT/S。The error correcting technology is indispensable in modern communication system.In this paper,in order to meet the high reconfigurable requirement of current error correcting test,a new error correcting codes(ECC)test platform was proposed based on the layer principle and the hardware-software co-design.The layering design construction enables the platform of high reconfiguration ability,which reconfigures quickly between the different ECC.In order to ensure the high-speed,ordinal and error-free data transmission,high-speed PCI data collection card PCI-7300A was used to transmit data between PC and FPGA,and the data was packaged layeredly and the parity bit and confirm-retransmission mechanism was added between port of PC and FPGA.Through the testing of non-binary LDPC by using this platform,the results show that the throughput of the platform reach to 446.83 Mbps when the transmit clock is 20 MHz.福建省重点科技项目(2006H0039);重庆市科委自然科学基金项目(CSTC;2007BB2387)---

Bioactivity of Polysaccharide from Cyclocarya paliurus (Batal.) Iljinsk Leaves in Reducing Blood Sugar

采用超声波萃取法 ,从胡桃科植物青钱柳中提取一种具有降血糖活性的多糖复合物 ,提取物得率为9.6 %。用四氧嘧啶糖尿病小鼠模型验证了青钱柳多糖的生物活性 ,ig青钱柳提取物 4周后 ,小鼠血糖值比糖尿病模型组降低了 41.3 %。葡萄糖耐量实验表明 :青钱柳多糖能增强糖尿病小鼠对葡萄糖的耐受力A hyperglycemia animal model was successfully established by treating normal Kunming mice with alloxan(ig). These mice were orally administrated by the polysaccharide from Cyclocarya paliurus (Batal.) Iljinsk (CPs), which was extracted by ultrasonic method. The extract is brown with the yield of 9.6% . It was demonstrated that the extract is able to significantly reduce the fasting serum glucose in alloxan diabetic mice by 41.3%. The capability of glucose tolerance is improved by the polysaccharide ideally.江西省自然科学基金 (0 12 0 0 18);; 厦门大学现代分析科学教育部重点实验室开放基金共同资

社会网络环境下用户参与图书馆数字资源组织与整合的需求调查——以部分高校为例

设计三套内容基本相同的问卷,就高校图书馆用户、专家、馆员对社会网络环境下用户参与的图书馆数字资源组织与整合的认识、需求和应用,从不同角度开展调查。根据调查数据和发现的问题,提出建议:强化用户宣传教育,倡导体验式技能培训;借助用户力量,加强数字资源组织质量控制;嵌入用户环境,推动数字资源组织与整合的学科化;挖掘用户需求,促进数字资源组织与整合的个性化。国家社科基金项目“社会网络环境下用户参与的图书馆数字信息资源建设模式研究”(项目编号:11BTQ043)成果之

湍流研究最近半世纪的一些发展

内容一、绪言(Ⅰ)研究湍流的意义(Ⅱ)国外开展湍流研究的情况二、湍流理论的进展(Ⅰ)先把流体动力学方程组平均的理论(a)1950年以前发展情况简述(1)Reynolds方程和混合长度理论(2)各向同性湍流的统计理论(3)具有剪应力的普通湍流理论(b)最近的剪切湍流的半经验理论(c)最近的湍流统计理论(1)E.Hopf理论(2)R.H.Kraichnan直接相互作用理论(8)Lewis等人的分子运动理论(4)Meecham理论。(5)S.Grossmann重正化群法(8)陈善谟统计动力学重复级串

3D vision measurement based on shape from silhouette

提出了一种将SHAPE frOM SIlHOuETTE(SfS)技术应用在三坐标机上的新方法,即用摄像机获取图像,用三坐标机作移动平台,构建视觉测量系统,应用SfS技术对物体进行三维测量。该视觉测量系统扩展了坐标机功能,扩大了其应用范围。实验结果表明,该视觉测量系统具有SfS技术和坐标机两者的优点,重构物体三维模型的过程简单快捷,精度高于0.4MM,其结果可作为坐标机智能测量的基础,是一种非常实用的方法。Shape from Silhouette(SfS) is a passive non-contact 3D measurement method,which is used in 3D modeling and reverse engineering etc.Using SfS method,a simple,low cost,efficient and accurate 3D information acquisition system can be established and the request of the surface material of the object that is measured is low.Compared to laser scanning,SfS can also measure an object with hole.A new method that Shape from Silhouette is applied to measure the objects in coordinate metrology is proposed,that is the vision measurement system is made up of the camera,the coordinate metrology and SfS.Intelligent measurement is carried out on the vision measurement system to 3D reconstruction and consequently the precision is improved.The functions of coordinate metrology are expanded and the applications of coordinate metrology are enlarged by the system.The running experiment results on the vision measurement system show that this system has SfS and coordinate metrology's advantages.The approach to 3D reconstruction is very efficient and the accuracy is higher than 0.4mm.This approach is a much applied way and it can be a foundation of intelligent measurement

Fabrication of patterned carbon nanotubes with adjustable arrays through controlled mesoscopic dewetting

E-mail Addresses: [email protected], we report the synthesis of aligned carbon nanotube (CNT) bundles with adjustable arrays by a non-lithographic and low-cost strategy. A polystyrene/ferrocene patterns on silicon (Si) substrate was prepared through controlled mesoscopic dewetting of dilute polystyrene/ferrocene solution. A variety of regular patterns, including ladder, stripe and scale, were synthesized simply by changing the solution concentration. Ultraviolet (UV) irradiation effectively cross-linked polymer skeleton and made it suitable for structure-directing agent. In the sequent pyrolysis, polystyrene skeleton was decomposed and ferrocene was converted into the skeleton of inorganic patterns simultaneously. Aligned CNT bundles guided by the catalytically functionalized inorganic patterns were initiated to grow. This methodology opens up a new avenue for fabricating CNT arrays in a simple and controllable manner. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.National Natural Science Foundation of China 50703032 51035002 20974089 Program for New Century Excellent Talents of Ministry of Education of China NCET-08-0475 Natural Science Foundation of Fujian Province 2009J0602

Fabrication of multi-level carbon nanotube arrays with adjustable patterns

通讯作者地址: Li, L (通讯作者),Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Chem & Chem Engn, Xiamen, Peoples R China 3. Natl Inst Adv Ind Sci & Technol, Next Generat Device Team, Res Ctr Photovolta Technol, Tsukuba, Ibaraki 3058568, Japan 电子邮件地址: [email protected] carbon nanotube (CNT) arrays with adjustable patterns were prepared by a combination of the breath figure (BF) process and chemical vapor deposition. Polystyrene-b-poly(acrylic acid)/ferrocene was dissolved in carbon disulfide and cast onto a Si substrate covered with a transmission electron microscope grid in saturated relative humidity. A two-level microporous hybrid film with a block copolymer skeleton formed on the substrate after evaporation of the organic solvent and water. One level of ordered surface features originates from the contour of the hard templates; while the other level originates from the condensation of water droplets (BF arrays). Ultraviolet irradiation effectively cross-linked the polymer matrix and endowed the hybrid film with improved thermal stability. In the subsequent pyrolysis, the incorporated ferrocene in the hybrid film was oxidized and turned the polymer skeleton into the ferrous inorganic micropatterns. Either the cross-linked hybrid film or the ferrous inorganic micropatterns could act as a template to grow the multi-level CNT patterns, e. g. isolated and honeycomb-structured CNT bundle arrays perpendicular to the substrate.National Natural Science Foundation of China 50703032 51035002 20974089 Ministry of Education of China NCET-08-0475 Natural Science Foundation of Fujian Province 2009J0602

Patterned Carbon Nanotubes with Adjustable Array: A Functional Breath Figure Approach

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China 3. Chinese Acad Sci, Shanghai Inst Organ Chem, Shanghai 200032, Peoples R China 电子邮件地址: [email protected], [email protected] is of paramount importance in many areas of modern science and technology. As a valuable part in miniaturized devices, large-scale aligned CNTs with serial port configuration is highly desirable. Here, we reported that the synthesis of a pair of patterned carbon nanotubes with the shape of serial port by CVD starting from different breath figure templates, cross-linked polymer matrix and ferrous inorganic micropatterns. The growth mechanism of the isolated CNT bundles is attributed to the selectively interfacial aggregation of the ferrocene to the walls of the cavities, a so-called Pickering-emulsion effect, whereas the honeycomblike skeleton of the dense CNT arrays develop from the catalytically functionalized hexagonal edges. This synthesis strategy exemplifies a new possibility for making use of CNTs to fabricate functional carbons with unique geometry or specific properties in a controllable way. We expect that the methodology can be also applied onto the fabrication of patterned graphene.National Natural Science Foundation of China 50703032,20974089 Natural Science Foundation of Fujian Province 2009J06029 Ministry of Education of Chin