查询词典 model theory

In the light of the complex, high-level and non-linear feature of the mathematical model which describe the transport of the coalbed methane, this paper study the fully-implicit solving method of the mathematical model in detail. Based on the complexity of the algebraic equations which are formed eventually, according to the alternating direction implicit difference pattern, this paper use the iterative method and the fully main element Gauss-Jordan eliminating method to solve equations, which is to use the iterative method to determine coefficient matrix and use the fully main element Gauss-Jordan method to solve th linear algebraic equation group, at the same time of studying the solving method of the mathematical model, according to the devising requirement of FORTRAN77 program structure, this paper draw up computer program and form the corresponding computer model, and verify the validity and reliability of the model in theory by operating the model.

重点研究了模型内、外边界及有关参数的处理，针对描述煤层甲烷运移的数学模型是一个复杂、高阶非线性数学模型的特点，详细研究了模型的全隐式求解方法，根据最后形成的代数方程组的复杂性，按交替方向隐式差分格式，采用迭代与全选主元高斯约当消去法相结合的方法求解方程：即确定系数矩阵采用迭代法，求解线性方程组时采用全选主元高斯约当消去法，在研究模型解法的同时按FORTRAN结构化程序设计的要求，编制计算机程序，形成相应的CBMRS计算机模型，并通过模型的运行从理论上证明了模型的正确性与可靠性。

Typical accident-causing" theories includes Heinrich" s Domino" s theory, its development by Bird, Adams and other people, progress of which is that it is deficiencies of management system that are the root cause in accident causation sequence. This is author" s idea resource and main method to produce the water traffic accident-causing theory . in addition, uncontrolled transferring of energy theory, applies widely in safety management scheme for water traffic; human error accident model can be used to analyze causes of collision accident and to take preventive measures; perturbation theory and multilinear event sequencing method is a very useful investigation method to water traffic accidents. All of these theories have contributed to the development of water traffic accident-causing theory. As to orbit intersecting theory, the paper thinks it extension of Domino s theory, although it exists independently.

有代表性的事故致因理论有海因里希因果连锁理论以及博德、亚当斯等人对该理论的发展，这些发展的主要进步是突出了管理缺陷是事故因果连锁中的基本原因，是本文分析和发展水上交通事故致因理论的主要思想来源和方法论；能量意外转移理论，广泛的应用在水上交通安全的各项具体管理制度中；人失误事故模型能用于指导对碰撞事故的原因分析和预防；动态变化理论及多线性事件连锁论对指导事故调查是较好的分析方法；轨迹交叉理论虽然以独立的理论形式存在，但本文认为其实质仍然是因果连锁理论的发展。

By applying game theory and contraction mapping theorem, a sufficient condition for the existence and uniqueness of Nash equilibrium in a multi-person non-cooperative game is proposed. Another implication in the sense of game theory is presented for the stability condition of supply-demand equilibrium in traditional economic theory. It can demonstrate the stability condition for supply-demand equilibrium in economic theory. So the stable supply-demand equilibrium of cobweb model in economics is in fact equivalent to the Nash equilibrium in game theory. That is a brand-new explanation for the conclusion in traditional economic theory.

应用博弈论中的有关理论与压缩映象定理寻求一类多ISP非合作对策纳什均衡存在、唯一的充分条件，给出了传统经济理论中供求均衡稳定性条件的对策论意义，证明了经济理论中的供求均衡稳定性条件；说明了经济学中蛛网模型的稳定供求均衡实际上就是对策理论中的纳什均衡，从而给出了传统经济理论中关于这一结论的新解释。

This paper studys channel resource reforger in this background, which adopts qualitative analysis and quantitative analysis, applies economy mathematics model of marketing theory linearity regressive model, Hotteline price competition model and profit – loss counterpoise theory.

本文正是基于这样的研究背景，采用定性与定量分析相结合的方法，应用市场营销理论、线性回归模型、豪特林价格竞争模型和盈亏平衡原理等经济数学模型，主要围绕着价格体系调整及中间商空间分布调整两个方面对渠道窜货问题进行了系统探索和研究。

Chapter 9 is conclusion and future prospect. There are five innovative findings in the paper. Firstly, the evolvement of extensions and connotations of two reengineering styles is analyzed based on their high risk, and finding their trends of amalgamation. With this, the concept of corporation reengineering is then redefined combining core competence theory and ideas of process change management, and decompounding it into two parts: pre-reengineering and post-reengineering. Its inner relationships are analyzed and explained by economics theory. Secondly, establishing a analysis framework of reengineering risks, risk factors of foreign BPR are analyzed and concluded systematically for the first time. Reengineering risks are divided into three parts: plan, design and executive based on process and project management, then risk factors system is abstracted. Thirdly, 72 reengineering corporations in Jiangsu province are investigated on risk condition. Furthermore, risk factors in every part are analyzed and reduced experimentally by factor analysis method, and a risk factors system to suit Chinese corporation's reengineering is established. Fourthly, setting up a choice model of reengineering projects, the objective optimization model is presented to ascertain the weigh of each factor, a method of sequencing reengineering projects is presented so that risk of each reengineering project can be evaluated and compared effectively. Fifthly, an integration relationship model among IT, BPR and strategy is established aiming at productivity paradox derivative from IT and its dual effects on BPR, IT investment priorities in BPR is narrated deeply.

本论文的创新点体现在五个方面：1）基于上述两种重组方式的高风险性，对它们的外延和内涵演变进行了分析，发现它们日益融合的趋势；然后结合核心能力理论和流程变革管理的思想对企业重组的概念进行了界定，将其分为&前重组&和&后重组&两部分，并对其内部关系进行了详细分析，同时应用经济学理论对其进行了解释。2）建立了重组风险的分析框架，并首次较为全面地分析和归纳了国外企业重组的风险因素，根据重组的过程和步骤以及项目管理的观点，将重组风险划分为计划、设计和执行3个部分，并在此基础上提炼出企业重组的风险指标体系。3）运用现场访谈、问卷调查的方法，调查了江苏省72家企业重组的风险情况，然后利用因子分析法对每一部分的每一风险因素进行实证分析，对风险指标进行了约减，建立了比较完善的适合我国企业的重组风险指标体系。4）建立了重组变革方案的选择模型，然后针对不同的重组方案提出了确定指标权重的目标优化模型，并基于三角模糊数之间两两比较的可能度概念，提出了一种重组方案排序法，从而可以有效地对各种变革方案的风险进行评估和比较。5）针对信息技术所造成的&生产率悖论&现象及其对重组的双重影响，建立了信息技术、企业重组和企业战略之间的整合关系模型，并对重组中信息技术投资的优先权问题进行了深入的阐述。

There are four parts in this thesis: the first mainly describes what in-service teacher education has changed in information age and the relationship between constructivism and web-based in-service teacher education; the second and the third are the main part of this thesis, mainly analyzing scaffolded instruction theory, and constructing a web-based scaffold theory model and its implementation model based these analyses, then discussing some problems those should be noticed in the development of web-based course; the fourth discusses a practical study for how to apply the model into practice.

论文分成四大部分：第一部分主要论述了在信息时代教师继续教育的变化以及建构主义理论与网络化教师继续教育的关系；第二部分和第三部分是论文的主体部分，主要针对支架式教学进行理论分析，并在分析的基础上建构了基于网络的支架模型及其实施模型，然后以此模型为指导论述了网络课程开发应注意的一些问题；然后在第四部分以前面的分析为基础进行了一个实例研究，以进一步探讨此模型的实际可行性。

Based on rail/wheel reaction and track/bride reaction theory and systems engineering theory, new vehicle-track and vehicle-track-bridge system dynamic models are established and discussed in details, including ballast track model and ballastless track model. The characteristics of the models are:(1) vehicle-track and vehicle-track-bridge system dynamic models are coupled in vertical and lateral;(2) track vibration on bridge is taken in account, track on bridge is considered as one or two layer continuous-point supported rail model, according to actual track structure, interaction between vehicle and bridge transfer from track structure;(3) three type of ballastless track models (tieembanked, elastic-tie-block, slab track) are presented;(4) models reflect the main feature of actual vehicle, track and bridge structure, the response computation frequency of models is relatively broad, which can be applied to analyze both low frequency and high frequency vibration.

基于轮轨相互作用和线桥相互作用特点，本文从系统工程角度出发建立了车辆、有碴轨道和无碴轨道、简支箱梁桥垂向和横向耦合系统动力分析模型，该系统模型具有以下特点：（1）车线、车线桥体系均考虑为垂向、横向耦合振动系统，车线间通过轮轨接触几何关系耦合，轨道与桥梁间通过轨道与梁体间的力与位移协调条件耦合；（2）充分考虑桥上线路在车线桥系统中参振作用，根据桥上线路轨道结构特点将桥上轨道结构模型具体化，即对桥上轨道结构视为多层支承体系，车桥间的动力作用通过轨道结构来传递；（3）建立了三种形式无碴轨道动力分析模型，即长轨枕埋入式、弹性支承块式和轨道板式无碴轨道模型；（4）系统模型详细，分析频带宽，适用范围较广。

The results show that Prandtl mixing length theory predicts airflows better than zero-equation model provided by Chen,and that Prandtl mixing length theory is more reasonable than zero-equation model provided by Chen but Chen's model seems easier to converge from the analyses of their construction.

由于该模型应用起来非常方便，并且计算量比标准K-ε模型小很多，它逐步受到工程研究人员重视。2001年，该模型被Fluent公司采用，并在其商用CFD软件Airpak修回日期：2006 07 11中采纳，对其在国际暖通空调领域内的广泛使用起了推动作用。

The first chapter of the thesis topics background analysis, a comprehensive grasp of the relevant literature, in-depth study of the question for laid a solid foundation; Chapter II from the perspective of China"s securities market, in-depth study of the volatility in the securities markets; Chapter III from Marcovitz portfolio theory, the capital asset pricing model and the arbitrage pricing theory systematic comparison, in-depth study of the International Securities Market Association theoretical basis, and then focus on the quantitative study of China"s emerging stock markets and the relevance of the surrounding market; this chapter use GARCH model family, pulse function, VAR model, market-related parameters , a smooth test, cointegration test, Granger causality test methods measure the volatility in the securities markets and the correlation with the degree of peripheral markets; Chapter IV in the face of China"s securities market volatility and market linkages with neighboring under the influence of the Chinese securities market from the current state of development of expounding China"s Permit Certificates of inevitability of the international market, Chinas securities market and to avoid the risk of the corresponding policy recommendations.

第一章系统分析论文的选题背景，全面掌握了相关的文献，为深入研究本问题奠定了坚实的基础；第二章从我国股票市场自身角度出发，深入研究我国股票市场的波动特性；第三章从马科维茨资产组合理论出发，对资本资产定价模型和套利定价理论进行系统比较分析，深入探讨了国际股票市场关联的理论，随后着重定量研究了我国新兴股票市场与周边市场的关联性；本章使用市场相关参数、平稳性检验、协整检验、Granger因果检验等计量方法测度了我国股票市场波动及与周边市场的关联程度；第四章基于我国股票市场波动及与周边市场的关联影响，从我国股票市场目前发展状况出发，阐述了我国股票市场国际化的必然性，并为我国股票市场的风险规避提出了相应的政策建议。

Hereon, Chapter Two expound some relevant theories about rural labour transfer in industrialization process, and focus on the theoretical mode of labour transfer in dual economic structure of developing country: Lewes dual economy theory, Ranis-Fei model, Jorgenson's model, M.P.Todalo's model, and"thrust-pull"theory.

其中：第二章阐述了工业化进程中农村劳动力转移的有关理论，重点阐述了发展中国家二元经济结构中劳动力转移的理论模式：即刘易斯二元经济理论、拉尼斯—费模式、乔根森模式、托达罗模式和&推—拉&理论。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失