国有股流通问题及解决方案浅析

国有股的流通问题一直是影响我国经济改革深化和证券市场持续健康发展的一把悬剑，然而管理层对这一问题也一直保持“押后再审”的态度。其中，最主要的原因是，庞大的国有股流通将对还不成熟的中国证券市场产生强大的冲击。因此，寻找一条既不影响证券市场健康发展，又能有效解决国有股流通问题的途径，是当前我国证券界面临的最为紧迫的任务之一。 本文回顾了我国上市公司国有股的形成及带来的问题，分析了现行国有股减持的方式及一些创新方案，提出了总体思路—明确目标、确定价格、阻止新增问题、逐步处理历史遗留问题，彻底解决国有股的流通。 本文共分四章： 第一章主要介绍了我国证券市场股权结构的历史沿革及遗留问题。 第二章...学位：工商管理硕士院系专业：管理学院工商管理教育中心_工商管理硕士(MBA)学号：19961502

Design and Implementation of Industry and Commerce Administrative Management System

工商行政管理部门作为党领导下一个政府职能机构，在经济高速发展的今天，面对多元化的市场主体、科技化的市场交易行为、多样化的市场营销方式、激烈化的市场竞争、国际化的社会主义市场，如何在监管与执法领域中为企业和广大人民群众提供高效、快捷的服务，已经成为迫在眉睫的问题。因此，建立工商行政管理系统是工商行政管理紧随经济发展的必要手段，工商行政管理系统在工商行政管理中的应用具有现实意义。 论文以某市工商管理局辖区监管为背景，研究工商管理部门在监管与执法领域中与企业的服务问题。论文采用理论与实践相结合的研究方法，借鉴和吸收了一线城市比较成熟的理论及研究成果。 论文首先论述了本课题研究的背景、现状及意义，...Currently, as a functional organization, the administration for industry and commerce is facing with a marker full of various entities, technological transactions, diversity, competition and globalization. Therefore, it is urgent for it to provide efficient and fast service to the enterprises. To establish the industry and commerce management system is necessary and also has a practical significan...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X200923000

海底管线中多相流动的实验研究

本文叙述了模拟气水或油气水多相管流流态的实验装置;它试图利用控制气水或油气水的流量和压力参数的方法来实现管内的各种流态如气泡流;弹状流;分层流;波状流;环雾流等。用差压式传感器来测量管子的压降。装置建成后还可开展油气输运中关键装备如气水(气油)分离装置;混相计量仪和混相增压泵的性能研究

基于克隆选择算法的面向程序路径测试数据生成方法

面向程序路径的测试数据自动生成技术是软件测试自动化的关键技术之一。文中结合程序分支函数叠加法和克隆选择算法的全局搜索性,提出一种基于克隆选择算法的面向程序路径测试数据生成方法。希望能够借助克隆选择算法具有多样性、记忆性、可实现快速全局优化搜索的优点,设计一种新的面向程序路径的测试数据自动生成方法。对算法的原理和实现做了详细描述,并将其与传统的基于遗传算法、模拟退火算法来实现软件测试数据自动生成方法进行实验对比,证实了该方法能较快地生成指定路径的测试数据

Study of Intelligent Multimedia Display System for Classic Chinese Poetry

以中国古典诗词为研究对象,首次尝试将自然语言处理、计算诗学和计算机动画等相关研究成果相结合来解决古典诗词的动画自动生成。首先使用基于SVM和协同学习的分类器对古诗风格、题材以及时间进行自动判定。随后在使用flASH ACTIOnSCrIPT 3.0脚本实现动画自动生成的基础上,利用共现关系对生成的动画进行动画元件的补充,并提出古诗场景划分方法。实验表明,提出的方法初步解决了古典诗词的动画自动生成问题,也为后继的相关研究提供了理论依据和实验基础。Focusing on classical Chinese poetry, the authors firstly achieve the combination of NLP, computing poetics and computer animation to solve the automatic animation generation of classical poetries.The authors firstly automatically determine the poetry style, subject matter and the time using SVM-based and collaborative learning classifier.After the achievement of automatic animation generation by using Flash Actionscript 3.0 script, using co-occurrence relationship supplies animation elements and gives poetry scene classification method.The results show that the proposed methodology initially solves the automatic generation of classical poetry animation, and provides a theoretical basis and experimental foundation for subsequent research.国家科技支撑计划(2012BAH14F03); 教育部博士点基金(20130121110040)资

基于PXA270嵌入式系统的Windows CE引导程序设计

PXA270处理器是一款Intel公司新近推出的32位微处理器,具有高性能、低功耗等优点,已开始广泛应用于以手持终端为代表的嵌入式系统开发中。Windows CE是目前手持终端等嵌入式系统主要采用的操作系统之一,要在基于PXA270处理器的手持终端产品中实现Windows CE系统的设计开发,关键在于如何设计实现Windows CE引导程序(即E-boot)。本文首先介绍基于PXA270处理器的嵌入式系统开发板(ARM-XMU)的基本架构和引导程序启动的基本原理、流程,分析该嵌入式系统启动所需的E-boot代码及其关键技术问题,并根据PXA270处理器的频率配置及存储器控制等特性,通过移植及优化,设计出适用于ARM-XMU开发板的引导程序,验证实现了一种基于Windows CE的手持终端系统

A Review on the Younger Dryas Event

发生在12.9~11.6 kA bP的一次北半球气候快速变冷——新仙女木(yd)事件在过去30年来一直是古气候研究的热点。当下由于人类活动引起全球变暖,研究类似的快速气候变化事件及其触发机制对于预测未来气候变化具有重要意义。然而时至今日,科学界对yd事件的发生时间、气候效应、触发机制及其全球性意义依然存在很大争议。对比多个高分辨率记录探讨了yd事件的发生时间及其年代学意义,详细总结了南、北半球中高纬地区及低纬地区近年来新发现的yd事件的记录及其气候效应,重点讨论了yd事件触发机制假说的发展与争议,并结合yd事件的研究现状提出了未来研究热点和重要方向。The Younger Dryas(YD) event which lasted from 12.9 ~ 11.6 ka BP is a rapid return to near-glacial conditions with a major impact on global climate that punctuated last glacial-Holocene transition period.The YD event was firstly found in records of mid-high latitude Northern Europe and North Atlantic vicinities and later identified broadly in North Pacific Oceans,Asia,North America,tropics and even in South Hemisphere.The mechanism of YD event is not clear although tremendous efforts have been paid over the past 30 years.Even the precise timing,duration and global impact remain ambiguous.The understanding of the magnitude of YD-like event in temporal and spatial scales andits forcing mechanism may help us to forecast the possible environmental and ecological impacts in global scale due to anthropogenic forcing.This article reviewed the progress of studies on the YD event,including the most recent dating of the onset and geographic pattern of climatic impacts,and particularly the triggering mechanisms proposed in recent years.The disparities of precise dates among records for the YD onset may result from counting mistakes,regional environmental responses and rapid fluctuation of atmospheric14 C.Globally,the YD event was characterized by abrupt climate change with increasing anomalies in magnitude toward the poles and opposite signs between Hemispheres,which modulated by bipolar seesaw mechanism.It is generally accepted that the YD event is caused by a slowdown Atlantic Meridional Overturning Circulation(AMOC).However,the triggering mechanism of this slowdown is debatable.Besides the earliest hypothesis of Lake Agassiz outburst,alternative mechanisms such as meltwater discharge into Arctic Ocean,extraterrestrial impact or atmospheric circulation forcing have been proposed under various supportive evidences.Tropical processwas suggested to play an additional role in abrupt climate change,of which high latitude was thought to be the modulator.The newest hypothesis suggested that YD event was an integral part of natural climate oscillation rather than a freak excursion.Finally,future directionstohave a complete understanding of the mechanisms of YD event are provided.国家自然科学基金项目重大研究计划“南海水体硝酸盐动力学与水团示踪”(编号:91328207);国家自然科学基金面上项目“中国边缘海沉积物氮同位素时空变化与控制因子”(编号:41176059)资

Preparation and Characterization of Sinter-Resistant RhSm2O3/SiO2 Catalyst and Its Performance for Partial Oxidation of Methane to Syngas

以乙酰丙酮铑(Rh(acac)_3)和乙酰丙酮钐(Sm(acac)_3)为前驱体,用浸渍法制备了Rh/SiO_2和Rh-Sm_2O_3/SiO_; 2催化剂。采用原位红外光谱、热重分析、低温N_2吸附、X射线粉末衍射、高分辨透射电子显微镜、H_2-程序升温还原和X射线光电子能谱等实验技术对催; 化剂的制备过程,比表面积和物相以及Rh与Sm_2O_3间的相互作用进行了表征,并以甲烷部分氧化制合成气为目标反应对催化剂的稳定性进行了考察。研究; 表明:以Rh(acac)_3和Sm(acac)_3为前驱体采用简单的浸渍法即可制备出Rh平均粒径为2.3; nm且具有良好抗烧结性能的Rh-Sm_2O_3/SiO_2催化剂。在浸渍过程中乙酰丙酮化合物通过与SiO_2表面羟基形成氢键而负载于载体表面。S; m(acac)_3在SiO_2表面的单层负载量(质量分数)约为31%,对应于Sm_2O_3的质量分数约为15%,只要Sm(acac)_3的质量分; 数低于这一阈值,均可保证分解后生成的Sm_2O_3以高分散形式负载于SiO_2上,且不会因高温(800; °C)焙烧而团聚。高分散于SiO_2表面的Sm_2O_3与Rh之间存在强的相互作用,可显著提高Rh的分散度,防止其在高温反应条件下烧结,进而使低; Rh负载量的催化剂表现出良好的甲烷部分氧化制合成气反应活性和稳定性。Rh/SiO2 and Rh-Sm2O3/SiO2 catalysts were synthesized by the conventional impregnation method using rhodium acetylacetonate (Rh(acac)(3)) and samarium acetylacetonate (Sm(acac)(3)) as precursors. The preparation and catalytic properties, as well as the interaction between Rh and Sm2O3, were characterized in detail by in situ infrared spectroscopy (IR), thermogravimetric analysis (TG), N-2 physisorption (Brunauer-Emmett-Teller (BET) method), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (H-2-TPR) and X-ray photoelectron spectroscopy (XPS). The performance of the catalysts for the partial oxidation of methane (POM) to syngas was also investigated. The results showed that a sinter-resistant Rh-Sm2O3/SiO2 catalyst with an average Rh particle size of similar to 2.3 nm could be synthesized using the conventional impregnation method with Rh(acac)(3) and Sm(acac)(3) as precursors. The surface silanol groups of SiO2 acted as the centers to interact with M(acac)(3) (M=Rh, Sm) molecules when SiO2 was impregnated in the M(acac)(3) solution, leading to the formation of a hydrogen-bonded M(acac)(3) layer on the SiO2 surface. In this experiment, the monolayer coverage of Sm(acac)(3) on the SiO2 surface was equal to a Sm(acac)(3) loading (mass fraction) of approximately 31%, which in turn corresponded to a Sm2O3 loading of approximately 15%. When a Sm(acac)(3)/SiO2 sample with Sm(acac)(3) loading below 31% was heated in air to approximately 360?, the monolayer Sm(acac)(3) species decomposed into highly dispersed Sm2O3 species on the SiO2 surface, which displayed superior stability against sintering at high temperature. No aggregation of the Sm2O3 species was observed even when the sample was heated to 800 degrees C in air. The strong interaction between the highly dispersed Sm2O3 and Rh plays a key role in increasing the dispersion of Rh species in the catalyst and preventing the Rh species from sintering under high temperature conditions. This factor should also be responsible for the superior activity and stability of the Rh-Sm2O3/SiO2 catalyst with extremely low Rh loading for the catalytic partial oxidation of methane to syngas.国家重点基础研究发展规划项目（2013CB933102）,国家自然科学基金（21473144,21373168）,国家基础科学人才培养基金项目（J1310024）及教育部创新研究团队项目（IRT_14R31）资

Optimization of Fermentation Conditions of Marine Algicidal Bacterium Microbulbifer sp. BS03 by Uniform Design

采用均匀设计法设计和二次多项式逐步回归分析,对一株高效杀塔玛亚历山大藻微泡菌bS03(MICrObulbIfEr SP.)产杀藻活性物质的发酵培养条件进行优化.通过单因素实验筛选出碳源、氮源、PH、培养时间和接种量为显著影响因子,并对5个显著影响因子采用u15(155)水平对培养基进行优化.结果表明bS03最适发酵培养条件为:蔗糖8 g/l,蛋白胨10.50 g/l,初始PH值7.5,培养时间32 H,接种量3.00%.验证试验结果显示,在此条件下该菌发酵液的干重为4.725 g/l,较优化前增加了31.35%,ld50为0.768%,较优化前降低了25.14%.研究结果为杀藻活性物质以及杀藻机理的研究奠定了理论基础.The optimal parameters of fermentation conditions of marine bacterium Microbulbifer sp.BS03 producing algicidal substances against Alexandrium tamarense were obtained by using Uniform Design and quadric polynomial regression methods.Five main factors were achieved through single factor experiments,that is,carbon source,nitrogen source,pH,incubation time and inoculum size.The U15(155) design result showed the optimum conditions of experiment were as follows: sugar 8 g/L,peptone 10.5 g/L,initial pH 7.5,incubation time 32 h,and inoculum size of 3.00%.According to the verification experiment,under the optimal conditions,the dry biomass was 4.725 g/L which was increased by 31.35% and LD50was 0.768% which was decreased by 25.14% compared with those of the basic fermentation conditions.This outcome will help us to separate active substances from complex components in medium and thus to reveal the mechanism of algicidal activity in the future.国家自然科学基金项目(Nos.40930847;31070442);福建省自然科学基金项目(Nos.2012J01150;2010J01223);福建省教育厅项目(No.JA10232);莆田市科技计划项目[No.2011S09(4)]资助;theOpenFundoftheKeyLaboratoryoftheMinistryofEducationforCoastalandWetlandEcosystemsofXiamenUniversity(CWel0902)---

MnO/Nitrogen-doped graphene composite cathode for high performance lithium oxygen batteries

本文采用水热法制备了MnO/氮掺杂石墨烯复合材料. 作为非水锂空气电池的正极催化剂, 该复合材料表现出了优异的电化学性能以及循环稳定性.; 在充放电电流密度为0.05 mA cm~(-2)时, 其能量效率高达84.6%, 远高于目前文献所报道的非贵金属催化剂的能量效率,; 也超过了基于贵金属的催化剂. 其氧还原反应(ORR)和氧析出反应(OER)的过电势分别仅为0.11和0.41 V.; 扫描电子显微镜(SEM)和透射电子显微镜(TEM)结果表明, 所制备的MnO纳米颗粒能够均匀地分散在氮掺杂石墨烯的表面.; 密度泛函理论(DFT)计算揭示, MnO(100)面是主要的催化活性面, 其理论ORR和OER的过电势分别仅为0.21与0.24 V,; 充放电电势差为0.45 V, 与实验结果0.52 V相当.MnO/nitrogen-doped graphene (MnO/NG) composite cathode was fabricated by; a facile one-pot method as cathode catalyst for non-aqueous lithium; oxygen batteries. It exhibited superior electrochemical performance with; higher round-trip efficiency and better cyclic stability. It showed a; high round-trip efficiency of 84.6% at the current density of 0.05 mA; cm~(-2) with the discharge and charge overpotentials of 0.11 and 0.41 V,; respectively. Through scanning electron microscopy, transmission; electron microscopy and X-ray photoelectron spectroscopy, it was; confirmed that MnO nanoparticles were homogeneously dispersed on NG; surface. The density functional theory calculations demonstrated that; the superior electrochemical performance of MnO/NG might be attribute to; the exposure of stoichiometric MnO (100) surface, with the ORR and OER; overpotential only to be 0.21 and 0.24 V, respectively. The; discharging-charging voltage gap is 0.45 V, in good agreement with the; experimental value of 0.52 V.国家重点基础研究发展计划; 国家自然科学基金; 国家基础科学人才培养基