查询词典 model theory

Therefore, this chapter, in the first place, discusses the axiomatization of theory ofevolution and introduce in detail Williams' axiomatic system about evolution. Insecond place, it discusses the dissipative theory and the hypercycle theory. Thisdiscussion is actually about a kind of semantic which is the molecular model.

因此，在这一章，首先，对进化理论的公理化形式进行讨论，详细介绍了Williams进化论的公理系统；其次，讨论耗散结构理论和超循环论，实际上是讨论了关于进化论的演绎公理系统的一种语义或分子层次的模型。

This part introduces some basic theories about MBO including Berle and Means model, property rights economics theory, incentive mechanism theory and the cost of agents theory.

更多存在合理性的有力支持，为管理层收购能够解决经营者激励不足、代理人成本过高等问题提供了基本的理论依据。

The study also summarizes the theories of rural population flow both home and abroad from the economic perspective, and makes the model of the rural population flow in the background of politics, Economy, society and culture in the transition period of China upon the binary economic structure theory, by-business theory,"push-draw"theory, anticipated revenue hypothesis, new labor force move and other population flow theories. Through the empirical analysis the study has demonstrated the economic motivations of population flow in the rural areas of Henan Province.

文章总结了国内外从经济方面研究农村人口流动的基本理论，特别是在二元经济结构理论、兼业理论、"推——拉"理论、预期收入假说、新劳动力转移理论等人口转移理论的基础上，结合中国转型期的政治、经济、社会、文化背景，构建了转型期中国农村人口流动的理论模型；经过实证分析，对河南省农村人口流动的历史过程和现状有了较为全面的认识，这对河南省农村人口流动的经济动因有了明确的认识。

The study also summarizes the theories of rural population flow both home and abroad from the economic perspective, and makes the model of the rural population flow in the background of politics, Economy, society and culture in the transition period of China upon the binary economic structure theory, by-business theory,"push-draw"theory, anticipated revenue hypothesis, new labor force move and other population flow theories.

文章总结了国内外从经济方面研究农村人口流动的基本理论，特别是在二元经济结构理论、兼业理论、"推——拉"理论、预期收入假说、新劳动力转移理论等人口转移理论的基础上，结合中国转型期的政治、经济、社会、文化背景，构建了转型期中国农村人口流动的理论模型；经过实证分析，对河南省农村人口流动的历史过程和现状有了较为全面的认识，这对河南省农村人口流动的经济动因有了明确的认识。

Firstly, reviews the American blockbuster development the history, analyzes it from the theory and the practice to have the development inevitability, and elaborates the achievements of the American blockbuster from the cultural, artistic and commercial dimensions, and then reveals its external manifestations as an important cultural industry in the United States. Secondly, discusses choicely and emphases the successful elements of the American blockbuster: the operational ideas, marketing strategies and industry chain model, the three-parts binds into the indivisible entirety, which shows the internal motivation of its continuing development. Thirdly, analyzes our country movie's development present situation, and elaborates its exist deficiency, and inspects and analyzes the question which existed in the practice development, which will provide the theory and the practice foundation for as follows. Finally, combines the analysis and understanding of the American blockbuster in theory and the current development situation of the domestic film, it puts forward several noteworthy viewpoints about the future development of China's film industry.

首先，以考察的眼光回顾美国大片发展的历史，从理论和实践上分析其发生发展的必然性，并分别从文化、艺术、商业三个维度阐述了它所取得的成就，揭示了它作为美国重要文化工业的外部表现形态；然后，有选择有重点的论述美国大片具有的成功元素：制作中的运作理念、发行中的营销策略及其产业链模式，这三者联结成一个不可分割的整体，透析出美国大片得以不断发展的内在动因；接下来，分析了我国电影的发展现状，阐述了其存在的不足之处，考察和分析了在实践发展中存在的问题，为下文提供了理论和实践基础；最后，通过对美国大片在理论上的探析与把握，结合当下国内电影发展状况，提出了我国电影产业在未来的发展中值得注意的几点看法。

The paper investigates finite element theory、mechanical vibration theory、thermal mechanics theory. It analyzes and researches torpedo car structure through summarizing the practical project experience. This paper establishes the reasonable finite element computing model. So as to make sure the computation gets analysis results more accurate.

本文研究了有限元理论、机械振动理论、计算机辅助工程分析方法和热力耦合理论，在总结实际工程经验的基础上对混铁车罐体结构进行分析研究，建立了合理的有限元模型，以求达到相对精确的分析结果。

The present paper through to the value investment theory's formation and the development discussion, to the value investor behavior characteristic's elaboration, using the behavior finance theory from the expectancy theory, the flock of sheep effect, responded excessively, the reverse operation model and so on four aspects and have carried on the contrast congenially to the value investment, theoretically explained why the value investment idea does have the sophistication.

本论文通过对价值投资理论的形成与发展的探讨，对价值投资者行为特征的阐述，运用行为金融理论从期望理论、羊群效应、过度反应、反向操作模型等四个方面对价值投资与投机进行了对比，从理论上解释了价值投资理念为什么具有先进性。

After the guide part, the author uses one chapter to hackle and evaluate the typical theories in global marketing field, which conclude global marketing theory, global service marketing theory and service customization theory structure and model.

随后，作者用了一章的篇幅，系统的梳理和评价了全球营销领域内各个阶段具有代表性的全部理论，包括全球营销理论、全球服务营销理论以及服务定制化理论，逐步点明对于本研究的参考价值。

There is mutual contradiction between direction estimation of user's signal and power allocation among all users in the beamforming algorithm. A twice game beamforming algorithm based on game theory is proposed to deal with it. Beamforming game algorithm mathematics model is constructed. During the first game, direction of signal and power allocation are mapped the game theory as "player", which are modeled as the problem of maximin function and obtain direction estimation first. Then during the second game, power allocations of different users are described as a multi-user game. Power updated algorithm is designed. The existence and uniqueness of the Nash equilibrium in the twice game beamforming algorithm based on game theory are proved by mathematics derivation.

摘要针对波束成形算法中，用户的信号方向估计值和用户之间的功率分配存在着相互矛盾，本文提出了一种基于博弈论的二次博弈波束成形算法，构建了波束成形博弈算法数学模型，首先在第一次博弈的时候，将波束成形算法中的信号方向和功率分配映射为博弈论数学模型中的"局中人"，将其建模为函数的极大极小值求解问题，先求解出信号方向；然后在第二次博弈的时候，将不同用户的功率分配过程描述为一个多用户的博弈过程，设计了功率分配更新算法，通过数学推导论证了纳什平衡点的存在性和唯一性。

The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究内容和取得成果如下：(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值，其结果与理论值一致，从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性；(2)在研究内聚应力等相关理论的基础上，推导出了研究尺度与材料弹性模量的近似关系，并确定了介观尺度上的弹性模量；(3)在宏观尺度上建立了全局有限元计算模型和子模型，得到了裂纹尖端应力应变场分布，结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的；(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型，得到了裂纹尖端断裂过程区的微观应力应变场；(5)当应力强度因子为30MPa.m1/2时，分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响，结果表明，裂纹扩展长度对试样整体应力应变分布影响不大，而对裂纹尖端区域有较大影响；(6)介。。。

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