90 research outputs found

    Study of Customer Relationship Managment at EHS Shipping Company

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    厦门作为中国东南沿海重要的港口城市和海峡西岸经济中心,经过近十年的高速发展,物流业发达,航运企业众多。在当前运力严重过剩,竞争异常激烈的形势下,客户成为航运企业最重要的资源。如何对客户资源进行有效地管理是所有航运企业面临的重要问题。 客户关系管理(CRM)理论为解决该问题而指明了方向,CRM理论的核心思想是“以客户为中心”,通过改进对客户资源的有效管理来提高客户服务水平,达到提高企业竞争能力的目的。EHS船务公司作为中小型航运企业典型代表,是本文的研究对象。为了促进公司信息化管理的进一步深化,提升公司的综合实力与竞争力,本文提出一套适用于EHS船务公司的CRM解决方案及评测指标,希望能够为其...Being one of the most busy ports located along the S.E. coast of China, as well as the economic centre along the west coast of the Taiwan Strait, Xiamen City has rapidly developed in the past ten years in its logistic industry with more and more shipping companies follow up. However, the rapid increasing of its shipping capacity is exceed its markets demand. Driven by the keen competition, shippi...学位:工程硕士院系专业:管理学院管理科学系_物流工程学号:X200815300

    炸药装药撞击起爆低速气炮模拟实验系统

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    本文建立的低速气炮模拟实验系统可以实现炸药装药撞击起爆基本现象的定性、定量观测。延长载荷作用时间是用低速气炮模拟炸药装药发射安全性的技术关键。本文用高压气垫式缓冲器能延长载荷作用时间,模拟膛压波形。低速气炮实验结果证实,炸药装药撞击时发生了变形、剪胀、局部破坏、气体压缩等一系列力学变化;这些力学变化在一定条件下导致炸药局部爆炸。载荷与缺陷是影响含缺陷装药撞击起爆的基本特征量

    Factors affecting urban renewal in high-density city : case study of Hong Kong

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    2010-2011 > Academic research: not refereed > Publication in policy or professional journalVersion of RecordPublishe

    煤与瓦斯突出的二维模拟实验研究

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    介绍了自行设计、加工的模拟煤与瓦斯突出的二维实验装置及配套的压力数据自动采集处理系统。在二维模拟实验装置上做了一系列的实验。实验发现,煤样的破坏存在"开裂"和"突出", 两类典型的破坏形式, 破坏阵面的前沿以拉伸强间断的形式向外传播。煤体破坏的初期是轴对称的, 而后则只在某一方向上向外扩展, 而且破坏阵面的扩散速度是逐渐衰减的, 不存在恒稳推进。在煤体破坏过程中, 应力重新分布, 并有4种不同的应力转移形式。这些结论对于认识煤与瓦斯突出的机理是十分有益的。F8T1R5

    SiO2对Al2O3凝胶纤维相变的影响

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    以尿素催化 硅 酸 乙 酯 水 解 制 得SiO2溶胶。29SiNMR、27AlNMR、FT-IR、TEM、DTA、XRD和SEM等对SiO2溶胶、Al2O3凝胶纤维化学结构和微观结构研究结果表明,该SiO2溶胶稳定性好,含有大量的单硅酸Si(OH)4,能和Al2O3表面的Al—OH反应生成Al—O—Si键而有效地将其包裹,从而阻止了过渡态Al2O3微晶的相互接触,抑制了α-Al2O3的成核和生长

    Concentration Protile of Etchant Measured by Microelectrode Technique in the Process of Chemical Micromachining

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    利用微圆盘电极技术,测定了KBr、L-胱氨酸和硫酸组成的刻蚀溶液体系中Pt电极表面电化学氧化产生的刻蚀剂Br2浓度分布,为约束刻蚀剂层技术(CELT)中刻蚀体系的选择和优化提供更直观的依据.GaAs表面CELT微加工实验证明了用微圆盘电极测得的表面刻蚀剂的浓度分布趋势与微加工实验所得到的结果一致.A carbon-disk microelectrode was used to investigate the surface concentration profile of etchant Br2, which was electrogenerated on the Pt working electrode. The steady state reducing currents of Br2 at different distances away from the Pt electode was measured. The concentration profile was estimated from the current-distance variation curves as a function of different sampling times. Experimentally determined concentration profiles are in good agreement with those estimated from the microetching results. The microelectrode technique has offered a good method to choose suitable etching solution for chemical micromachining.国家高新技术发展规划(863项目)(2002AA404170);; 福建省自然科学基金计划资助项目(E0520001

    Numerical simulation of the fracture process in ceramic FPD frameworks caused by oblique loading

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    Using a newly developed three-dimensional (3D) numerical modeling code, an analysis was performed of the fracture behavior in a three-unit ceramic-based fixed partial denture (FPD) framework subjected to oblique loading. All the materials in the study were treated heterogeneously; Weibull's distribution law was applied to the description of the heterogeneity. The Mohr-Coulomb failure criterion with tensile strength cut-off was utilized in judging whether the material was in an elastic or failed state. The simulated loading area was placed either on the buccal or the lingual cusp of a premolar-shaped pantie with the loading direction at 30 degrees, 45 degrees, 60 degrees, 75 degrees or 90 degrees angles to the occlusal surface. The stress distribution, fracture initiation and propagation in the framework during the loading and fracture process were analyzed. This numerical simulation allowed the cause of the framework fracture to be identified as tensile stress failure. The decisive fracture was initiated in the gingival embrasure of the pontic, regardless of whether the buccal or lingual cusp of the pontic was loaded. The stress distribution and fracture propagation process of the framework could be followed step by step from beginning to end. The bearing capacity and the rigidity of the framework vary with the loading position and direction. The framework loaded with 90 towards the occlusal surface has the highest bearing capacity and the greatest rigidity. The framework loaded with 30 towards the occlusal surface has the least rigidity indicating that oblique loading has a major impact on the fracture of ceramic frameworks. (C) 2015 Elsevier Ltd. All rights reserved

    A 3D numerical simulation of stress distribution and fracture process in a zirconia-based FPD framework

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    In this study, a numerical approach to the fracture behavior in a three-unit zirconia-based fixed partial denture (FPD) framework was made under mechanical loading using a newly developed three-dimensional (3D) numerical modeling code. All the materials studied were treated heterogeneously and Weibull distribution law was applied to describe the heterogeneity. The Mohr-Coulomb failure criterion with tensile strength cut-off was utilized to judge whether the material was in an elastic or failed state. For validation, the fracture pattern obtained from the numerical modeling was compared with a laboratory test; they largely correlated with each other. Similar fracture initiation sites were detected both in the numerical simulation and in an earlier fractographic analysis. The numerical simulation applied in this study clearly described the stress distribution and fracture process of zirconia-based FPD frameworks, information that could not be gained from the laboratory tests alone. Thus, the newly developed 3D numerical modeling code seems to be an efficient tool for prediction of the fracture process in ceramic FPD frameworks. (C) 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 96B: 376-385, 2011

    Concentration protile of etchant measured by microelectrode technique in the process of chemical micromachining

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    A carbon-disk microelectrode was used to investigate the surface concentration profile of etchant Br-2, which was electrogenerated on the Pt working electrode. The steady state reducing currents of Br-2 at different distances away from the Pt electode was measured. The concentration profile was estimated from the current-distance variation curves as a function of different sampling times. Experimentally determined concentration profiles are in good agreement with those estimated from the microetching results. The microelectrode technique has offered a good method to choose suitable etching solution for chemical micromachining

    《难经》并非解答今本《内经》疑义之作

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    自古以来,大多研究《难经》的学者都认为它是解答《内经》疑义的著作。在今天,这种观点得到进一步的介绍和论述。然而,现在也有学者并不认同这种观点,但是他们的论证却并不十分可靠,以致近几十年出版的《难经》教材以及相关医史著作中,仍然认为《难经》是阐释《内经》要旨之作。本文从《难经》问难中针对的"《经》言"出发,将八十一难分为三大类,即问难并非针对"《经》言",问难中所称引"《经》言"未必见于今本《内经》,以及所引"《经》言"虽见于今本《内经》,解答却与今本《内经》内容相冲突或重复,进而从这三方面出发,通过对文献的体例和内容进行比较分析,以期寻找《难经》并非是解答《内经》疑义之作更为可靠的证据
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