A Research on Information System on eCMMS Business Model of F-Company

在网络、信息高度发达的时代，企业越来越注重信息系统的建设与应用。然而，很多企业在信息系统的建设应用方面并没有达到预期的目的和效果，它们的信息系统并没有协助提升公司的核心竞争力，也没有为公司创造和保持竞争优势。 造成企业信息系统建设应用不理想的因素有多种，根本原因就是许多公司的信息系统并没有从商业应用的角度去整体规划与业务匹配的信息系统，企业还处在被动式的IT服务过程中，使企业的信息系统杂而乱。 基于此背景，本文以F公司为案例，对F公司基于业务模式的信息系统的状况进行研究分析。F公司作为世界最大的3C产品制造企业，正是凭借独特的业务模式（eCMMS）取胜。F公司在信息系统应用方面表现如何，又...In the era of information and net, more and more corporations gradually realize and emphasize the application of information system. However, many cases show that it did not still reached the goal and performance on application of information system, information system didn’t not only improve the corporation’s core competence but also not help corporation to create and keep the strength. What...学位：工商管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792012115081

浅议行政性垄断及其成因与对策

行政性垄断作为计划经济的产物 ,给我国市场经济体制的运行带来极大的破坏。通过分析行政性垄断的特征、表现形式及成因 ,依据我国具体情况 ,有针对性地提出了对策措施

A NEW EXPLOITATION METHOD FOR GAS HYDRATE IN SHALLOW STRATUM: MECHANICAL-THERMAL METHOD

天然气水合物是国家的战略能源之一.天然气水合物分解相变使其开采难度高于常规化石能源.国际天然气水合物试验性开采表明通过降压、注热等方法难以满足商业化开采的需求,尤其在水合物位于浅层、软土情况下,持续稳定且高效率的热量供给是其瓶颈.天然气水合物机械-热联合开采是一种新概念模式,即通过粉碎水合物沉积物通过管道输运并在内部分解,这样既增加了传热的表面积,又利用海水热量和对流传热提高了能量供给效率.分析表明:利用该方法开采时水温过高会导致水合物分解过快而产生不稳定流,温度过低又导致水合物二次生成或结冰;水流流速既要能使被粉碎的水合物沉积物颗粒悬浮和流动,又不能导致流动失稳.为了实现高效安全的机械-热水合物开采,经过初步分析提出原位水合物地层粉碎的颗粒直径设定在0.1~1.0cm 之间,控制水流速度为0.22~0.67m/s,温差保证在5 K以上,混合物中水的体积分数大于0.85

Advances in study of mechanical properties of gas hydrate-bearing sediments

Gas hydrate (GH) is defined as the crystalline solid, or clathrate hydrate, which are formed by some kinds of low mass molecular gases, such as methane, carbon dioxide, and hydronitrogen, with water at relatively high pressure and low temperature conditions. Gas hydrate-bearing sediments (HBS) are some sand, clay and mixed sediment containing gas hydrates. Advances in the study on the mechanical properties of HBS are summarized mainly in aspects of the laboratory test, in-situ investigation, and theoretical model. Firstly, the main factors are discussed including the structure of GH, formation method and matrix characteristics of HBS; Secondly, progress on the laboratory tests and results are discussed, which mainly includes the tri-axial tests with the natural and synthesized HBS samples, the acoustic tests for measuring the elastic coefficients, the tests for investigating the effects of main factors such as the gas and water contents and soil types on the strength of HBS. Thirdly, for in-situ investigations, including the geophysical surveying, in-situ tests (such as downhole tests) and results are summarized; Fourthly, several theoretical models for estimating the mechanical properties of HBS are introduced; At last, the emphases and the tendency in the future study on the mechanical properties of HBS are discussed

盖层特性对CO_2埋存逃逸速度的影响

CO2地下埋存盖层逃逸是判定其埋存可行性的重要因素之一。通过理论分析分别建立了盖层渗透、盖层裂隙或者油井、盖层扩散三种气体逃逸与盖层特性之间的关系,并进行了盖层特性对三种逸出方式的影响分析,以及三种逃逸快慢之间的对比。结果表明:初期以渗透逃逸为主,但随着埋存年限的增加,气体盖层渗透减弱,扩散逃逸占主要地位

Preliminary study on electric resistance of hydrate-bearing sediments

电阻法是探测水合物的一项有效技术手段。通过模拟试验,研究水合物沉积物电阻特性与水合物饱和度等因素的关系,对水合物勘探及储量估算具有重要的意义。通过试验室制样获得粉细砂和黏土骨架的含四氢呋喃(四氢呋喃)水合物土样并对其电阻进行研究。结果发现,当沉积物孔隙中不含液体且骨架的干密度小于一定值时,水合物沉积物的电阻随水合物质量含量的增加而减小,变化范围随干密度的增加而减小;当沉积物孔隙中水合物和液态四氢呋喃共存时,合成试样的四氢呋喃体积分数越大,孔隙中液态四氢呋喃越多,沉积物电阻也就越大,且随水合物饱和度的增加而减小

基于组合评价模型的分析

摘 要: 本文界定了现代服务业的范围, 采用层次分析的方法建立了现代服务业综合实力的评价指标体系, 并且利用 层次分析法和因子分析法, 确定了各评价指标的权重。据此对我国各省市 2005 年现代服务业的综合实力进行了评价, 并提 出了发展现代服务业的建议。Abstr act: This paper defines the scope of modern service industry and establishes a system of evaluation index for the com- prehensive strength of modern service industry with the method of AHP. Moreover, it has determined the weight of each index in the system by using the methods of AHP and factor analysis. Accordingly, we evaluate the comprehensive strength of modern ser- vice industry in China's various provinces and cities in 2005 and put forward some suggestions for the development of modern service industry

Two New Compounds Isolated from A Seaweed-associated Fungus, Aspergillus sp. AF044

目的:研究海藻真菌 ASPErgIlluS SP. Af044 的化学成分。方法:通过色谱层析柱对提取物进行分离纯化, 并通过波谱解析(一维、二维的核磁共振谱和质谱)确定化合物的结构。结果:分离纯化得到3个化合物, 分别鉴定为6-HydrOXy-5-METHOXy- 3-METHyl-3, 6-dIHydrO-2H-PyrAn-4-CArbOXylIC ACId (1), 8, 9-dIHydrOXy-8, 9-dEOXyASPyrOnE(2) And PEnICIllIC ACId(3)。结论:化合物 1和 2 是首次发现的新化合物。化合物 3 在多种真菌菌株中分离得到。] AIM: To study the chemical constituents of the seaweed fungus Aspergillus sp.AF044.METHODS: The fermentation extract was isolated and purified by column chromatography (MPLC, Sephadex LH-20, normal Si gel).RESULTS: Three compounds (1 - 3) were isolated and determined as 6-hydroxy-5-methoxy-3-methyl-3, 6-dihydro-2H-pyran-4-carboxylic acid (1), 8, 9-dihydroxy-8, 9-deoxyaspyrone (2) and penicillic acid (3) based on their spectral data (1H, 13C, HMQC, HMBC, 1H-1H COSY and NOE).CONCLUSION: 1 and 2 are new compounds; Penicillic acid was isolated from many fungi.ThisprojectwassupportedtheKeyGrantofChineseMinistryofEducation(No.306010)---

Experimental study of the sea floor damage due to gas escape in hydrate dissociation

海床下水合物分解可能造成大量的生成气体泄漏.气体渗漏一方面造成海床表层的破坏;另一方面使得海水密度减小造成海上一些结构的安全隐患.本文通过实验研究泄漏气体在水中上升过程中的扩散行为,以及渗漏对海底粉砂土海床的破坏规律.考虑压力,盖层厚度在渗漏气体对盖层土体形态破坏的影响,获得了气体在水中上升过程中的扩散角的特点,以及气体泄漏导致的海床冲刷坑范围随气体压力、土层厚度的变化规律,可以为进一步的研究和工程应用提供参考. 更多还

九龙江流域地表水锰的污染来源和迁移转化机制

锰是人体必需微量元素,但近年来河流湖库等地表水锰超标现象时有发生,威胁供水安全.本文于2016—2017年在福建省九龙江流域开展水系沿程梯度调查及机理实验,结合历史监测资料综合研究,探明九龙江锰含量的时空分布与迁移转化规律,揭示九龙江锰的污染来源、超标成因与调控机制.结果表明,溶解锰高值及超标站位集中在北溪上游矿区支流和干流部分水库,且主要发生在枯水期;上游矿区支流颗粒锰含量最高,随后从上游到下游沿程递减,且与总悬浮颗粒物(TSM)和pH显著正相关(p7.8)环境促进亚热带红壤颗粒富集锰,大量富锰颗粒进入pH逐渐下降的河流下游和电站库区后向溶解锰转化,从而导致锰超标.河流下游及库区pH值下降的主要原因包括酸沉降、酸性废水排放、富营养化条件下有机物分解等.研究结果为我国地表水锰污染防控、饮用水安全保障与流域水环境综合管理提供科学依据.国家重点研发计划(No.2016YFC0502901);;福建省环保科技计划项目(No.2016R017)~