Research for value chain theory applied in corporate strategy analysis

价值链理论强调价值链的各项业务活动间的联系不仅存在于企业价值链内部，而且存在于企业价值链与供应商和渠道商的价值链之间。因此，竞争不是发生在企业之间，而是发生在企业各自的价值链之间。只有对价值链的各个环节（业务流程）实行有效管理的企业，才有可能真正获得市场上的竞争优势。本文研究价值链理论在企业战略分析中的应用，运用价值链理论分析工具，从产业层面、公司层面和运营层面对企业的发展战略进行分析。通过对产业价值链的分析，明确产业的战略控制环节和企业在产业链中的定位，为企业在制定前向或后向一体化发展策略提供支持；通过对公司价值链分析，结合公司所处的内外部环境分析，确定企业所拥有的资源和独特的能力是否与公司...Value chain theory emphasizes that the interconnection of corporate activities exists not only in the inner corporate value chain, but also among the corporate value chain and the vendors’ or wholesales’ value chain. Competitions occur in different corporate value chains instead of corporations. Those who manage the sectors of value chain (business procedure) effectively and efficiently could atta...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：20021519

固体表面液滴热毛细迁移的实验研究

首先从理论方面推导了固体表面液滴热毛细迁移速度、临界半径的关系式,然后通过实验的方法系统的研究不同的液滴在二氧化硅底板上的热毛细迁移行为。液滴静置在一个固体表面上时,会出现部分润湿,完全润湿和不润湿的情况。对于部分润湿来说,可用Young方程来描述三相线处的静态接触角。由于固体基底表面非均质性或液滴的热动力学因素等,液滴会出现接触角滞后现象。当固体表面存在温度梯度时,液体的表面张力随温度

数据挖掘的技术与商业定义及其研究对象

本文在对数据挖掘考察的基础上,从技术角度和商业角度对数据挖掘的概念予以界定,并探讨了数据挖掘在知识发现中的地位,明确了数据挖掘的对象和对该领域的研究方向.国家社会科学基金资助(03BTJ014);; 国家统计局统计科学研究重点项目基金资助(LX2002-2

澳大利亚战略政策研究所网络安全领域研究及对 中国智库的启示

摘要：[ 目的 / 意义 ] 自《关于加强中国特色新型智库建设的意见》发布以来，国内学者对西方 知名智库进行了全面、深度的研究，取长补短，积极发展中国特色新型智库，但对除欧美之外的 智库研究较少。因此笔者以澳大利亚权威智库澳大利亚战略政策研究所（ASPI）为研究对象，介绍 了 ASPI 在网络安全与信息化领域的研究成果，为我国智库的发展提供借鉴。[ 方法 / 过程 ] 本文主 要使用了文献调研和网络调研的研究方法，介绍了 ASPI 的发展历程，梳理了近年来其在新兴科技 领域的研究成果。[ 结果 / 结论 ] ASPI 共有 7 大研究领域，主要包括国防战略与国家安全、反恐、 国际网络政策、国际计划、风险与应变、北部与澳大利亚安全以及战略警务和执法计划。在新兴科 技领域，ASPI 极为关注与中国的合作和竞争关系研究。ASPI 在人员流动与合作机制、国际交流与 合作、社交媒体利用等方面的经验值得国内智库学习和借鉴。</p

Experimental Study on the Combined Evaporation Effect and Thermocapillary Convection in a Thin Liquid Layer

The coupling mechanisms and flow characteristics of thermocapillary convection in a thin liquid layer with evaporating interface were studied. The planar liquid layer, with the upper surface open to air, was imposed externally horizontal temperature differences. The measured average evaporating rates and interfacial temperature profiles indicated the relative importance of evaporation effect and thermocapillary convection under different temperature gradients. A temperature jump was found at the interface, which was thought to be related to the influence of evaporation effect. All above mentioned results were repeated in a rarely evaporating liquid to compare the influence of evaporation effect

The Data Sorting for Data Mining and Its Application

本文从统计学的角度对事务性数据库进行了描述,提出了加权构造综合属性函数方法,对事务项进行了排序分析,并用该方法对某些区中国移动手机用户的消费情况进行了综合评价,得到了许多有意义的结果。In this article, we describe the transactional databasas form the angle of statistics.We next propose the weighted construction method of the generalized attribute function for the transactional databases and analyse the data sorting of the transaction. Then we use the method to give a overall assessment on the consumption of China Mobile customers in some district of China,and gain a lot of meaningful results.国家社会科学基金资助(03BTJ014);; 国家统计局统计科学研究重点项目基金资助(LX2002-2

Analysis and computation of ESI coefficient of planar waveguide based on field matching

首次采用了场的最小二乘方 (LSE)和最小均方误差 (LMS)判据寻找平板波导的等效阶跃折射率 (ESI)模型 ,并通过它预测了平板波导的传输特性。计算结果表明 ,原始波导与等效波导场分布在具有最大近似性的基础上 ,ESI模型可以在一定范围内有效的预测平板波导的传输特性。归一化频率与第一个高阶模的截止频率之比在小于 0 7的情况下 ,用上述两种判据找到的ESI模型预测传输常数相对误差小于 0 0 1 % ,预测归一化传输常数的相对误差小于 1 0 %。A method to find Effective Step-Index(ESI) model based on field matching criter ia of least-square-error(LSE) and least-mean-square(LMS) error is put forward, and the propagation quality from ESI coefficients is predicted. When the ESI model a n d the original waveguide have the best approximated field distribution, the prop agation quality of planar waveguide efficiently can be predicted based on ESI mo del in specific range. When the ratio between normalized frequency and cut-off fre quency of the first higher model is lower than 0.7, the relative error of predic t ing propagation constant from the ESI model is less than 0.01%, and the relative error of predictiong normalized propagation constant is less than 10%

Sessile Drop in Microgravity: Creation, Contact Angle and Interface

We present in this paper the results obtained from a parabolic flight campaign regarding the contact angle and the drop interface behavior of sessile drops created under terrestrial gravity (1g) or in microgravity (mu g). This is a preliminary study before further investigations on sessile drops evaporation under microgravity. In this study, drops are created by the mean of a syringe pump by injection through the substrate. The created drops are recorded using a video camera to extract the drops contact angles. Three fluids have been used in this study : de-ionized water, HFE-7100 and FC-72 and two heating surfaces: aluminum and PTFE. The results obtained evidence the feasibility of sessile drop creation in microgravity even for low surface tension liquids (below 15 mN m (-aEuro parts per thousand 1)) such as FC-72 and HFE-7100. We also evidence the contact angle behavior depending of the drop diameter and the gravity level. A second objective of this study is to analyze the drop interface shape in microgravity. The goal of the these experiments is to obtain reference data on the sessile drop behavior in microgravity for future experiments to be performed in an French-Chinese scientific instrument (IMPACHT)

Interfacial temperature discontinuities in a thin liquid layer during evaporation

Recent measurements of the temperature profiles across the liquid-vapor interface of a steady evaporating liquid were performed in a thin planar liquid layer subjected to externally imposed horizontal temperature differences when the interface was open to air. Temperature discontinuities have been found to exist at the interface with an growing tendency as the imposed horizontal temperature difference increasing. Under the co-influence of thermocapillary convection and evaporation effect, a thin layer of 0.5 mm thick with approximate uniform temperature was found just below the liquid-vapor interface. Repeated experiments and further comparisons of the interfacial temperature profiles for different spatial positions along the streamwise center line and varying depths of the liquid layer were also carried out. And the temperature discontinuity was found related to the temperature in liquid phase, which was strongly influenced by the coupling of thermocapillary convection and evaporation effect

基于多聚化重组抗原的检测戊型肝炎病毒IgM与IgG抗体的ELISA的建立及初步评估

建立并评估分别检测戊型肝炎 (戊肝 )病毒IgM与IgG抗体的捕获法及间接法ELISA。以原核表达的多聚化重组HEV蛋白为抗原 ,建立戊肝捕获法IgMELISA(E2 -IgM )和间接法IgGELISA(E2 -IgG)。利用 2 9只实验感染猴系列血清及多份临床急性肝炎血清、正常人血清以及单克隆抗体评估所建立的方法的敏感性与特异性 ,并与商品化试剂 (Genelabs公司抗 -HEVIgG和IgM试剂 ,GL -IgG/GL -IgM )进行比较。 2 9只恒河猴E2 -IgM和E2-IgG的阳转率均为 10 0 % ,其中 75 %在感染后 4周内阳转 ,均早于ALT异常时间。E2 -IgM持续 2～ 14周 ,平均6周 ;E2 -IgG在 70周时仍无一阴转。GL -IgG阳转率为 79 3% ( 2 3/ 2 9) ,多数晚于ALT异常时间 ,平均持续约18周 ,但最长为 1只在感染后 70周时仍为阳性。用E2 -IgM试剂盒检测 92 8份正常人血清 ,仅 2份OD值略高于0 2。检测 5 10份临床急性肝炎血清 ,可明显将其区分为 2个部分 ,一个部分OD值小于 0 2 ,其OD值分布与正常人相似 ;另一个部分OD值大于 0 4,共 131份 ,其中 10 9份大于 1 0。可能分别对应于急性肝炎中的非戊肝患者和戊肝患者。 119份非甲～丙急性肝炎中 ,E2 -IgM阳性 5 7份 ,GL -IgM阳性 2 9份 (E2 -IgM均阳性 )。 5 0 6 0份普通人群血清的E2 -IgGOD值在 0 2以下 ,形成一个