模型理论

Firstly, the random walk problem is introduced and the solution is schemed out theoretically. And then, the equivalent RC circuit for thermal analysis is discussed as the IC package is divided into many small blocks at the desired level of granularity. The techniques of analyzing the equivalent RC network by random walk algorithm are then discussed. At the same time, an equivalent model for thermal analysis is set up according to an IC chip. The proposed method is then applied to this model for both steady and transient analysis. Two speedup strategies, pseudo parallel walking and walk results reuse, are proposed sequentially to improve the algorithm performance.

首先简述随机行走问题的基本概念，给出问题的理论解法；然后讨论基于三维网格划分的IC芯片热等效阻容网络模型，着重分析随机行走算法在热等效模型中的应用，并建立一个实际芯片的热等效模型，采用随机行走算法模拟计算模型的稳态温度分布和瞬态温度变化；最后针对随机行走算法应用中的不足，提出了伪并行行走和结果重用2种加速技术。

When the geometric similitude ratio of the model to the prototype was determined and the loading similitude condition was satisfied by using similitude theory in structure modeling and experimental techniques, the prototype soil parameters were derived according to the model test result. The vibrating wheel compelled by harmonic exciting force was treated as a lumped mass vibrating system by equation equity method. By using this mechanical model in vibrating compaction, soil parameters were identified according to the equivalence of vibrating differential equation. The curve fitting method of amplitude versus frequency response was used for dynamic simulation based on the systematic dynamic equation of vibrating roller-soil system.

用相似理论与模型试验法在确定了模型与原型之间的几何相似比并满足载荷相似条件后，根据模型试验结果推导出了原型土体参数；用方程对等法把受简谐激振力作用的振动轮等效为集中质量振动系统，以此作为振动压实过程的力学模型，根据振动微分方程的等效条件进行识别；用幅频特性曲线拟合法以振动压路机－土壤系统动力学方程为基础，用计算机进行动态仿真。

As an often used physical model with good theoretical and practical values, StreeterPhelps model has been widely used to study water quality. However, in some special water areas the utilitization of StreeterPhelps model has some limitation as confirming reaeration coefficient often comes from tests in rivers with fast water flow speed with no consideration of wave effects. Furthermore, in practical research in Three Gorges Reservoir, the changing rule of COD appears abnormally. In some water areas far from pollution source, the value of COD changes with time, but does not follow the exponential attenuation rule. This phenomenon can not be explained by former modified StreeterPhelps model.

StreeterPhelps模型是目前进行河流水质研究常用的物理模型，具有良好的理论和实用价值，然而在某些特定水域，该模型的应用受到限制，主要原因是复氧系数的取定多在水流速度较大情况下得到的，而未考虑水面波动对复氧系数的影响，另外，在实际研究过程中发现三峡库区COD变化的规律出现异常：在离排污口相当远的水域，COD随时间变化趋势并不是指数衰减，而是在某个常值附近微小摆动，以往很多修正过的StreeterPhelps模型都无法解释这个现象。

However, in some special water areas the utilitization of StreeterPhelps model has some limitation as confirming reaeration coefficient often comes from tests in rivers with fast water flow speed with no consideration of wave effects. Furthermore, in practical research in Three Gorges Reservoir, the changing rule of COD appears abnormally. In some water areas far from pollution source, the value of COD changes with time, but does not follow the exponential attenuation rule. This phenomenon can not be explained by former modified StreeterPhelps model.

StreeterPhelps模型是目前进行河流水质研究常用的物理模型，具有良好的理论和实用价值，然而在某些特定水域，该模型的应用受到限制，主要原因是复氧系数的取定多在水流速度较大情况下得到的，而未考虑水面波动对复氧系数的影响，另外，在实际研究过程中发现三峡库区COD变化的规律出现异常：在离排污口相当远的水域，COD随时间变化趋势并不是指数衰减，而是在某个常值附近微小摆动，以往很多修正过的StreeterPhelps模型都无法解释这个现象。

Through the study of the trends of development of modern Western science methodology, the paper analyses the main features of three methodological models: prestippositionalist model of logics , relativist model of history and integrated model of logics and history.

本文以马克思主义观点审视现代西方科学方法论的演变趋势，揭示了现代西方科学方法论三大模型——预设主义的逻辑模型、相对主义的历史模型以及逻辑与历史相结合模型——的主要特征，并对西方各派方法论的成就与兴衰的缘由，作出了理论的概括和系统的评估。

Workflow process model consists of logic layer and semantics layer, and workflow pattern is the summarization and generalization of all the repetitiously used conjunctive symbols and its conjunctive relationship in the logic layer of a workflow process model.

本文在考察和比较了国内外各种关于工作流建模理论研究的基础上，针对实现工作流管理系统这一目标所涉及的工作流元模型、工作流过程模型等几个核心问题，在前人研究成果的基础上，对工作流元模型的可扩展性、工作流过程模型建模中存在的问题以及工作流管理系统的实现等方面开展了深入的研究工作。

In light of the analysis of the traditional methods of model representation and model composite, a novel theory of model representation and model composite based on Agent technology was proposed.

在分析当前模型表示与模型复合方法的局限性基础上，结合Agent技术，提出了基于Agent的模型表示与模型复合理论。

A new method to development of on-line model of coiling temperature control on the runout table was discussed.

本文提供了一个建立卷取温度控制模型的新方法，即从输出辊道带钢温降理论模型的解析解出发，构造在线模型，然后对在线模型的结构、参数进行显著性检验，最后提出了控制方案。

Experimental studiesThis experiment adopts the chronic serum sickness MsPGN animal model improved and combine it with damp and hot model to establish experimentalrat foundation that contain deficiency of Yin and damp and hot . Compared the biochemisty and organizing such index as the shape , etc at the different stage of the model metioned above with those facts of MsPGN rat to find out the relationship between deficiency of Yin damp and hot and MsPGN on the development of illness and the role in MsPGN course, know the disease machine of MsPGN and treat MsPGN for Chinese medicine, screen the effective square medicine and establish the experiment foundation.

实验研究本实验采用改良的慢性血清病MsPGN动物模型，将其与具有一定实验研究基础的大鼠阴虚，湿热证模型有机结合起来，建立大鼠实验性MsPGN阴虚湿热蕴结证的病证结合模型，通过与单纯实验性大鼠MsPGN模型不同造模阶段的生化、组织形态等指标的比较，探讨阴虚湿热蕴结与MsPGN发病的关系及其在MsPGN发病过程中的作用，为中医认识MsPGN的病机及治疗MsPGN，筛选有效方药奠定理论基础。

On the base of these work, the theory and technique which deal with ecological modeling, two-dimension ecological dynamic model and stochastic eutrophication model was researched thoroughly.

在此基础上，较为深入地研究了富营养化生态模型、二维生态动力学模型、随机富营养化模型和面污染模型所涉及的理论和技术问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。