838 research outputs found

    Design and Implementation of Library Management System for Hezhou University

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    作为高校理论知识和科研文献存储的重要机构,图书馆充分发挥信息储存和现代化管理的优势,给予高校在科研和教学方面带来巨大的帮助。然而,传统的图书馆管理模式在日新月异的计算机网络发展中呈现老态,不能紧随计算机网络发展的步伐。这种新时代发展所带来的影响要求开始在传统的图书馆管理模式中进行改革,使新型的自动化信息管理方式将更加贴合应用需要。尤其是数字图书馆的出现和成型使得图书系统在自动化管理方面走向更为信息化的设计领域,各高校需要迫切地对传统的图书馆自动化管理模式进行变革,以满足广大师生的需要。 本文以贺州学院图书馆为背景。作者通过对信息技术发展作为高校图书馆管理能力提升的核心课题进行研究,分析相关课...Colleges and universities as an important mechanism of theoretical knowledge and scientific literature stored library full advantage of modern information storage and management, to give universities a huge help in scientific research and teaching. However, the traditional library management presented the old state in the ever-changing computer network development, we can not keep pace with the de...学位:工程硕士院系专业:软件学院_软件工程学号:X201123095

    The Preliminary Study of Function of Arabidopsis Gene SAV7

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    光和温度都是保障植物正常生长的极其重要的因素。植物为适应各种复杂多变的外界环境,已经进化出一套能够感应光和温度变化,并由此激发一系列的适应性反应机制。当植物种植过于密集而造成遮荫时,喜阳植物拟南芥会感应到光强以及红光:远红光的比例(R:FR)的下降,表现叶柄和下胚轴的快速生长,叶片偏下性生长的增强,以及叶绿素含量降低等变化,称为避荫综合症(ShadeAvoidanceSyndrome,SAS),使其逃离遮荫环境来竞争有限的光资源。同样,当环境温度升高时候(29℃),拟南芥也能感受到这样细微的变化,通过调整自身形态的变化,比如下胚轴和叶柄伸长,叶子偏下性生长增强等,最大限度地适应高温环境,以此来...Light and temperature are extremely important factors to regulate plant growth and development. In order to adapt changes in their ambient environment, plants have evolved a set of mechanisms to sense the changes in light and temperature, respectively, and then stimulate a series of responses to adapt themselves to those changes. When plants grown at high densities, Arabidopsis thaliana can percei...学位:理学硕士院系专业:生命科学学院_微生物学学号:2162013115249

    海岸带水体中莠去津在线快速检测传感器系统研制

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    采用分子印迹固相萃取,实现对海水中莠去津的高效分离富集,消除海水基体效应,以低检出限分子印迹聚合物膜离子选择性电极为传感器敏感元件,实现对莠去津的高灵敏电位检测,结合在线过滤等流动分析自动化处理 技术提高传感器体系分析效率,开发出了一类能够在线快速检测海水中莠去津浓度的新型电位型传感器系统。所开发的检测系统对莠去津检测的线性范围在5×10-10 ~4×10-9 mol L-1 ,检出限可达9×10-11 mol L-1 ,并最终成功应用于实际海水样品莠去津含量检测中

    Research about the national unified plan of the old-age insurance for urban workers

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    随着老龄化时代的到来,当前及今后很长一段时间养老问题是大多数国家都要面临的普遍问题。我国作为世界最大的发展中国家,我国老龄化问题呈现出一些自身的特点:老龄人口基数大、老龄人口增速快、高龄人口数量多、老龄人口区域分布差异大、老龄化与经济发展不协调。面对这些特点,如何有效解决养老问题事关重大,不仅关系国泰民生,社会和谐,还关系到全面建设小康社会能否顺利实现。城镇职工基本养老保险制度从建立至今,一直处于不断改革和完善中,经过多个阶段的发展以后最终建立起了“社会统筹+个人账户”模式;社会统筹从起初的县市级统筹发展到省级统筹,在省级统筹的状态下,基本养老保制度仍然存在诸多问题,突出的表现就是全国城镇职工...With the development of the aging population,for a long time in the present and the future,pension problem is that most countries face a common problem. China as the world's largest developing country, China's aging problem presents some own characteristics: large aging population base, faster growth of ageing population, a lot of elderly population, more large difference of regional distribution ...学位:管理学硕士院系专业:公共事务学院_社会保障学号:1392012115045

    The effect on enterprise’s effective tax rate of VAT replacing business tax in transportation industry ——Based on the analysis of listing Corporation financial data

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    为避免重复征税、保证抵扣链条完整,同时也为了达到结构性减税的目标, 我国开展了以“营改增”为重点的税制改革。从2012年1月1日起在上海开始试 点,8月扩大至全国10个省市,至2013年8月1日,全国税务系统已普遍施行 营改增,2014年1月1日起,铁路运输也进入营改增范围。至此,“营改增”已 覆盖交通运输业全行业。本文以交通运输企业作为考察样本,比较分析了改革前 后企业实际税负水平的变化情况,采用上市公司财务数据分析,探讨了改革的实 际影响,并对改革实践与政策目标是否相符等问题进行了讨论,以期为改革的进 一步深化提供参考。 我们分析了对交通运输业征收营业税时存在的突出问题,主...In order to avoid repeated taxation, ensure the credit chain integrity, at the same time in order to achieve the goal of structural tax cuts, China carried out " VAT replacing business tax " as the focus of the tax system’s reform. From January 1, 2012 began a pilot project in Shanghai, in August expanding to 10 provinces and cities nationwide, to August 1, 2013, the national tax system has be...学位:税务硕士院系专业:经济学院_税务硕士学号:1552012115179

    城镇职工基本养老保险碎片化的原因与对策

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    城镇职工基本养老保险制度从建立至今,一直处于不断改革和完善中,经过多个阶段的发展以后最终建立起了“社会统筹+个人账户“模式;社会统筹从起初的县市级统筹发展到省级统筹,在省级统筹的状态下,基本养老保制度仍然存在诸多问题,突出的表现就是全国城镇职工基本养老保险“碎片化“现象严重,各地缴费基数、费率不统一,导致各地负担、待遇不一,严重违背了社会保险的公平原则

    Economic Growth Model Analysis and Empirical Study of China——Based on Element System and Causality Analysis

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    经济增长是人类所关注的永恒课题,影响经济增长的因素很多,而且关系错综复杂,本文试图从经济要素系统的角度出发,在界定经济系统和相应的要素系统以及因果关系的本质的基础上,探讨要素系统与经济增长之间的互动关系。在实际分析中,本文将要素系统简化为人力资本和物质资本的系统,并对其进行量化处理,在此基础之上加入解释要素交互作用效应的乘积项,建立经济增长的系统模型,着重考察要素之间的交互作用对经济增长的互动关系,并进一步推导出基于交互项的经济增长动态误差修正模型。运用此模型,本文对我国的经济增长与投入要素的相互关系进行了实证研究,并探讨了我国经济增长与资本要素系统投入之间的长期均衡,以及短期波动的作用机制。...Economic growth is an eternal topic of human that always been focused on, which is affected by complex factors and relationships. This paper addresses that the study of economic growth should be base on the analysis of economic element system and causality research. In practice, use the quantifiable economic growth element system which is composed of human capital and material capital. And bui...学位:经济学硕士院系专业:经济学院计划统计系_数量经济学学号:20041003

    Design and Implementation of Valve Control Automatic Meter Reading System Based on C#.NET

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    本课题在广泛调研国内现有低压居民集抄系统(AMRS)的基础上,结合广西电网公司崇左供电局的低压居民集抄需求,在满足现有的自动抄表功能的基础上实现低压居民阀控集抄系统。整个系统的完成实现了原有的“先用电后收费”的传统模式向“先交费后用电”模式的转变,在电力营销抄表和收费环节实现了真正意思的减少人力资源、提高数据准确性、提高客户满意度等。 整个系统的设计与开发我主要完成以下工作: (1)在充分研究当前传统低压居民集抄系统的功能的基础上,对低压居民阀控集抄系统需要实现的功能进行了详细的分析。 (2)对整个低压居民阀控集抄系统的网络架构和程序架构进行了详细的设计,实现模块化开发、模块化维护和模块...This topic is to implement the Low-voltage Valve Control Set System based on the existing automatic meter reading function, combining the research of domestic existing low-voltage CCMS system (AMRS), and the demand collecting from customers of China Southern Power Grid in Guangxi Chongzuo Sales. The completion of the entire system is to change the traditional mode of payment from "use then pay" to...学位:工程硕士院系专业:软件学院软件工程系_工程硕士(软件工程)学号:X201223079

    Effects of pH on the PtRu/C Catalyst Prepared by Microwave-assisted Ethylene Glycol Process

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    以微波协助乙二醇工艺合成了碳负载不同粒径大小的PtRu/C纳米催化剂,主要考察了溶液pH值对PtRu粒子大小的影响.利用紫外可见光谱、能量散射X射线谱、透射电镜和X射线衍射谱对PtRu纳米催化剂进行了表征.结果表明,pH值是一个对PtRu粒子大小有着重要影响的因素.TEM结果显示随着溶液pH值的增加,PtRu粒径从3.5nm减小到1.5nm.当溶液pH值达到11.0时,由于金属粒子被保护,合成的催化剂中金属载量明显减少.溶液pH值在9.0左右合成的PtRu/C催化剂具有适宜粒径(2.4nm)和均匀分布的金属颗粒,具有最好的甲醇电氧化活性.PtRu nanoparticles supported on the carbon, with different mean particle sizes, were synthesized by microwave-assisted ethylene glycol process, the effects of pH on the PtRu/C catalyst were mainly investigated. UV-Vis spectroscopy, energy dispersive X-ray analysis, transmission electron microscopy, and X-ray diffraction were applied to characterize the PtRu nanoparticles. The solution pH had important influence on the metal particle size. TEM results indicated that the PtRu mean particle size decreased from 3.5 nm to 1.5 nm with the increase of pH value. However, when pH value reached 11.0, the metal loading of synthesized catalyst decreased distinctly because the metal nanoparticles were protected in solution. The results showed that the PtRu/C catalyst synthesized at pH ca 9.0, with appropriate particle sizes (2.4 nm) and homogenous dispersed particles, had the highest electrocatalytic activity for methanol electrooxidation among all the synthesized catalysts.国家自然科学基金(20673089);; 福建省科技重大专项(2005HZ01_3)资助项
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