113 research outputs found

    Design and Implementation of Supply Chain Management System for Medicine Circulation Enterprise

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    随着世界经济的发展和人类健康受到更多的重视,医药流通企业在人类健康活动中起着越来越重要的作用。随着计算机和网络信息技术的发展,推动信息产业成为全球最具活力的产业,企业信息化极大地提高了企业的组织能力和经营效果。那么处于当前社会环境和经济环境下的企业需调整自身组织结构,用信息技术来武装自己,以适应不断变化的外部环境,快速响应个性化的客户需求。在医疗流通行业竞争日益激烈的今天,长龙药业和所有的企业一样将面临比过去更加激烈的市场竞争和更严峻的挑战。市场已发出报警信号,为提升企业竞争力和快速响应能力,迅速引入新的经营理念,改进现行管理模式,尽最大可能引进信息化系统,从而使得企业从传统的成本控制和个性化...With the development of the world economy and human health, more and more attention has been paid to the development of the pharmaceutical circulation enterprises in human health activities, which plays an increasingly important role in the development of human health. With the development of computer and network information technology, the information industry has become the most dynamic industry...学位:工程硕士院系专业:软件学院_软件工程学号:X201323133

    A Study on the Relationship between International Trade and Economic Growth in Fujian Province

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    伴随全球一体化的进程不断加快,国际分工日益深化,对外贸易作为拉动经济的三驾马车之一,对一国以及区域经济增长的促进作用与日俱增。在现有的科研成果中,关于对外贸易与经济增长关系的研究,绝大多数的国内外学者都对进出口贸易对经济增长有促进作用持认同观点,具体就中国而言,改革开放以来经济持续而高速的增长的事实已经充分证明对外贸易对于经济增长的积极作用。但是目前针对国内各个地区和省份对外贸易与经济增长的相互影响有待进一步的研究。基于以上分析,本文选择福建省作为研究对象,希望通过对福建省进出口贸易与经济增长之间的关系分析研究,弄清二者的因果关系与互相促进关系,同时能够有针对性的提出适合福建省经济更好、更快发...With the process of globalization accelerating and international division of labor deepening, international trade as one of stimulating economic troika , the promotional effect of it on economic growth has become increasingly apparent. In the current research on the relationship between international trade and economic growth, the vast majority of scholars are of the import and export tra...学位:经济学硕士院系专业:经济学院_政治经济学学号:1532011115202

    我国大学组织结构变革的现状研究

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    从大学的决策体制、执行体制、咨询体制和监督反馈体制四个维度出发对我国大学组织结构变革的现状进行调查研究,调查结果显示虽然我国大学组织结构变革已经取得了一定的进步,但还是存在着一定的问题,其中最主要的方面就是在变革过程中过分注重物和机构的更新,忽视了人的维度和制度层面的更新,即便是强调了制度变革,但也分离了制度与人性之间的关系

    对外贸易与增长动态关系研究——以福建省为例的实证分析

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    通过规范的动态经济计量分析方法,以福建省1981—2011年的相关数据为例,研究了对外贸易与经济增长之间的长期均衡关系及短期动态变化规律。结果表明:外贸与经济增长存在长期稳定的均衡协同关系,且这种关系具有反向的修正机制;对脉冲响应函数的分析表明,进出口贸易对福建经济增长都具有促进作用,相对而言,出口贸易对经济增长的促进作用要大于进口贸易对福建省经济增长的促进作用

    非水溶剂溶胶-凝胶法制备的纳米卤氧化镧在甲烷氧化偶联反应中的应用

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    采用非水溶剂溶胶-凝胶法制备了具有四方晶体相结构的纳米LaOX(X=Cl,Br).X射线粉末衍射和扫描电子显微镜结果表明,纳米LaOX样品的形貌规整、粒径均匀(平均粒径约为47nm).在甲烷氧化偶联(OCM)反应中,纳米LaOX显示出比常规尺度LaOX更高的催化活性和C2选择性,且纳米LaOX具有良好的稳定性.此外,常规尺度下,LaOBr催化剂活性和C2选择性高于LaOCl;纳米尺度下,两催化剂活性相差不大,但LaOBr上C2选择性明显更高

    Application of Ion Chromatography to Electrooxidation Process of Glyoxal

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    基于离子色谱原理,成功地研发出一种适用于乙二醛电氧化过程主要物种快速检测的新技术。研究表明,该技术不仅具有设备简便,检测快速灵敏和选择性高等优势,而且还能实现同时测定多种组分的目的。检测灵敏度小于0 5mg/L,保留时间、峰高、峰面积的变异系数均小于2%;对各物种回收率的检测结果为97%~103%。离子色谱电导检测技术的成功研发为乙二醛电氧化过程物种的实时、快速检测提供了便捷的分析手段,这对电合成体系的生产指导和过程评价具有重要意义。Based on ion chromatography theory,a new technology has been developed to separate and determine glyoxal and glyoxylic acid which are the main substances in the electrooxidation of glyoxal to glyoxylic acid.Experimental results demonstrated that this technology exhibits not only the advantages such as simple equipment,high sensitivity and high selectivity,but also the performation of determining simultaneously a mixture of several substances.The detecting sensitivity is less than 0.5 mg/L and the coefficients of variation of retention time,peak height and peak area outperform two percent.The recoveries of the detected substances are all ranged between 97% and 103%.Ion chromatography with a conductivity detector was successfully used as a convenient analytical means for the speedy and simultaneous detection in the process of glyoxal electrooxidation.This may be of importance in the guidance and evaluation for the electrosynthesis system.厦门市科技攻关项目基金资助(3502Z2001);; 国家自然科学基金资助(90206039

    Ni的化学态对甲烷部分氧化反应机理的影响:能学分析

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    采用键指数归一-平方势(UBI-QEP)法对不同化学态Ni上甲烷部分氧化反应中各可能基元步骤进行了能学计算研究.结果表明,反应的速度控制步骤与金属Ni的化学态有关.还原态Ni上CO形成的反应速度控制步骤为表面上CH_3与O物种间的缔合,而带部分正电荷的Ni上CO形成的反应速度控制步骤则为甲烷氧助解离形成表面CH_xO物种.还原态和带部分正电荷的Ni中心在表面上共存时,反应的速度控制步骤将取决于表面CH_3形成与表面CH_3、O物种缔合两反应间的竞争,其竞争的强弱涉及Ni的化学态.此外,反应活性中心向正电荷的Ni转化时,会导致表面C和O及H和H物种缔合的活化能显著降低,有利于CO、H_2的形成,而表面CH_x物种解离则变得不容易,表面积炭受到明显的抑制

    Nano-lanthanum Oxyhalide Prepared by Nonaqueous Sol-Gel for Oxidative Coupling of Methane

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    LaOX (X = Cl, Br) nanoparticles with tetragonal crystal structure were successfully prepared via sol-gel approach with non-aqueous solvents. Characterizations by X-ray powder diffraction and scanning electronic microscopy show that the LaOX nanoparticles are regularly in shape and highly uniform in size with an average diameter of about 47 nm. For oxidative coupling of methane (OCM), the nanosize LaOX catalysts have higher methane conversion and C(2) selectivity than the LaOX catalysts with conventional size and show good stability in activity and selectivity during the catalyst life test at 650 degrees C. At conventional size, the methane conversion and C(2) selectivity for OCM over the LaOBr catalyst are higher than that over the LaOCl catalyst, and at nanosize, there is not so much difference in methane conversion between LaOBr and LaOCl. However, the C(2) selectivity for OCM reaction over LaoBr is significantly higher than that over LaOCl, especially at low temperature.National Basic Research Program of China (973 Program)[2010CB732303]; National Natural Science Foundation of China[21033006, 20923004, 20373054

    Influence of Ni Chemical States on the Partial Oxidation Mechanism of Methane: An Energetics Analysis

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    An energetics analysis of the possible elementary steps involved in the partial oxidation of methane (POM) over different chemical states of Ni was carried out using the unity bond index-quadratic exponential potential (UBI-QEP) method. The results show that the rate determining step for the partial oxidation mechanism of methane is related to the chemical state of the Ni. Over reduced Ni the rate determining step for CO formation is the association of surface CH(3) species with surface O species. Over a partial positive charged Ni surface the rate determining step is that methane dissociates into the CH(x)O species with the assistance of oxygen. Over the reduced and partial positive charged Ni sites in coexistence, however, the rate determining step depends on the competition between the formation of surface CH(3) species and the recombination of surface CH(3) species with surface O species. This competition is related to the chemical states of the Ni sites. If the partial positive charged Ni sites are predominant on the surface, the recombination of surface C species with surface O species and the recombination of surface H atom species favor CO and H(2) formation because of decreasing barriers. The surface CH(x) species does not dissociate easily and surface carbon deposition is significantly inhibited.National Natural Science Foundation of China[21033006, 20923004]; Natural Science Foundation of Fujian Province, China[2007J0168]; National Key Basic Research Program of China (973)[2010CB732303

    中国物理海洋学研究70年:发展历程、学术成就概览

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    本文概略评述新中国成立70年来物理海洋学各分支研究领域的发展历程和若干学术成就。中国物理海洋学研究起步于海浪、潮汐、近海环流与水团,以及以风暴潮为主的海洋气象灾害的研究。随着国力的增强,研究领域不断拓展,涌现了大量具有广泛影响力的研究成果,其中包括:提出了被国际广泛采用的"普遍风浪谱"和"涌浪谱",发展了第三代海浪数值模式;提出了"准调和分析方法"和"潮汐潮流永久预报"等潮汐潮流的分析和预报方法;发现并命名了"棉兰老潜流",揭示了东海黑潮的多核结构及其多尺度变异机理等,系统描述了太平洋西边界流系;提出了印度尼西亚贯穿流的南海分支(或称南海贯穿流);不断完善了中国近海陆架环流系统,在南海环流、黑潮及其分支、台湾暖流、闽浙沿岸流、黄海冷水团环流、黄海暖流、渤海环流,以及陆架波方面均取得了深刻的认识;从大气桥和海洋桥两个方面对太平洋–印度洋–大西洋洋际相互作用进行了系统的总结;发展了浅海水团的研究方法,基本摸清了中国近海水团的分布和消长特征与机制,在大洋和极地水团分布及运动研究方面也做出了重要贡献;阐明了南海中尺度涡的宏观特征和生成机制,揭示了中尺度涡的三维结构,定量评估了其全球物质与能量输运能力;基本摸清了中国近海海洋锋的空间分布和季节变化特征,提出了地形、正压不稳定和斜压不稳定等锋面动力学机制;构建了"南海内波潜标观测网",实现了对内波生成–演变–消亡全过程机理的系统认识;发展了湍流的剪切不稳定理论,提出了海流"边缘不稳定"的概念,开发了海洋湍流模式,提出了湍流混合参数化的新方法等;在海洋内部混合机制和能量来源方面取得了新的认识,并阐述了混合对海洋深层环流、营养物质输运等过程的影响;研发了全球浪–潮–流耦合模式,推出一系列海洋与气候模式;发展了可同化主要海洋观测数据的海洋数据同化系统和用于ENSO预报的耦合同化系统;建立了达到国际水准的非地转(水槽/水池)和地转(旋转平台)物理模型实验平台;发展了ENSO预报的误差分析方法,建立了海洋和气候系统年代际变化的理论体系,揭示了中深层海洋对全球气候变化的响应;初步建成了中国近海海洋观测网;持续开展南北极调查研究;建立了台风、风暴潮、巨浪和海啸的业务化预报系统,为中国气象减灾提供保障;突破了国外的海洋技术封锁,研发了万米水深的深水水听器和海洋光学特性系列测量仪器;建立了溢油、危险化学品漂移扩散等预测模型,为伴随海洋资源开发所带来的风险事故的应急处理和预警预报提供科学支撑。文中引用的大量学术成果文献(每位第一作者优选不超过3篇)显示,经过70年的发展,中国物理海洋学研究培养了一支实力雄厚的科研队伍,这是最宝贵的成果。这支队伍必将成为中国物理海洋学研究攀登新高峰的主力军
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