模型

A 3-D EVP model is generalized from the 1-D EVP model according to the rule of Lagrange's dissipative rate function occurring in the 1-D EVP model. Compared with experimental data obtained from consolidation-undrained triaxial shear creep test, the present 3-D EVP model is verified to be valid.

参照一维EVP模型的Lagrange耗散率函数所呈现出来的规律，把一维EVP模型推广到三维EVP模型，并与三轴不排水剪切蠕变试验数据相比较，验证了本文三维EVP模型的合理性。

The model belongs to the conceptual model, and is a parameter distribution model, too.

该模型属于概念性模型，又是参数分布模型，在塔里木河各子流域的使用中，发现存在一些问题，使模型不够合理，计算精度也不理想。

For the model,three sub-models,which are domain knowledge description,concept set and relation set,are realized by combined with the definition of Domain Ontology.

结合领域本体的定义，对数据——知识转换模型从领域知识基本描述、概念集合和关系集合三个角度加以分析，实现了相关的子模型，从而得出了完整的数据——知识转换模型，并基于该模型给出了具体的数据——知识转换文本。

The math models of the tree structure chart and the net structure chart are formed by describing the different road state abstractly.The tree structure chart model is presented without consideration of U structure and ring structure. This kind of model has a notable feature: there is a line only between the two dot in the chart, which means that there is only one road from one point to another point in expressway ,so the tree structure chart is called "single roads chart".

在不考虑U型路段和环路的情况下，提出了高速公路的树状结构图模型，该模型具有一个显著的特点：图中两点之间有且仅有一条连线，这意味着由高速公路上的一个地点到达另一个地点仅有一条通路，也称这种高速公路树状结构图为"单路径图"；考虑到包含U型路段和环路的高速公路路况，提出了高速公路的网状结构图模型，这种模型可抽象成一个连通图，即图中任意两点之间至少有一条直线相连，这意味着由高速公路上的一个地点到达另一个地点有多条通路，也称这种高速公路网状结构图为"多路径图"。

The thesis reviews the concerned study status of domestic and overseas first, then make factor analysis for ice flood, Partial Least-square model, Artificial Neural Network based on Genetic Algorithm model, Support Vector Machine model for ice drift, ice freeze and ice break are established. The results are reasonable and precise.

首先阐述了国内外有关研究现状，然后对影响黄河宁蒙段凌汛的三大因素(热力因素、动力因素、河势因素)进行了理论分析，在此基础上分别对流凌日期、封河日期和开河日期研制了偏最小二乘回归模型、改进人工神经网络模型和支持向量机模型，试预报结果表明，所建立模型精度高，预报结果令人满意。

Firstly, we consider SIQR epidemical models with continuous and pulse vaccinations; the reproduction numbers have been obtained for those models; by using Dulac function, we prove the global stabilities of equilibrium of SIQR model with continuous vaccination. In the SIQR epidemical models with pulse vaccinations, we have also discussed the existence of the infection-free periodic solution, the global stabilities of the infection-free periodic solutions, and the effectiveness of pulse vaccination and continuous vaccination policies has been compared for the two models.

文中首先考虑具有连续免疫接种和脉冲免疫接种的SIQR传染病模型，分别获得了它们各自的基本再生数；利用Dulac函数方法证明了具有连续免疫接种的SIQR模型无病平衡点的全局渐近稳定性；在脉冲免疫接种下SIQR传染病模型里，讨论了无病周期解的存在性，证明了该周期解的全局渐近稳定性，并且对连续和脉冲接种下的SIQR传染病模型的接种效率进行了比较。

Next, a few important friction models in common use are discussed, including six static and seven dynamic friction models. The forms, characteristics and applicability of these models are discussed in detail.

其次， 系统地介绍了几种较为重要的、常用的摩擦模型，包括6种静态摩擦模型和7种动态摩擦模型，并对每一种模型的构成，特点和适用范围等进行了较为详细地论述。

Taking the conceptual model in electrostatics and the conditional model in mechanics as two examples,the author points out that the process of selection and abstraction of the major and minor factors is the premise to the establishment of a model.

理想模型是物理学研究的重要方法之一。从静电学中的概念模型和力学中的条件模型的数量关系，分析了主、次要因素的取舍及其抽象是建立模型的前

The sixth, this thesis synthetically utilizes many kinds of modern statistical method and the econometrics model to research how policy event affect stock market influence, especially it has successfully applied the condition VaR model, Hesin test, BDS test, recursion BDS test, VAR model and pulse response analysis, EGARCH model and news response curve in the empirical analysis, and obtains some regular conclusion.

六、将多种现代统计方法和经济计量方法综合运用于政策事件影响中国证券市场波动问题的研究中，特别是成功地应用了条件VaR模型、Hsieh检验、BDS检验、递归BDS检验、经济计量模型、VAR模型及脉冲响应分析、EGARCH模型及其消息反应曲线等方法，得出了若干有意义的结论。

Constructing geometric model of analyzed object is the first step of mesh generation, in this research subject, we mainly analyze the medical encephalon CT picture ,so we select digital instrument to extract border characteristic points from encephalon CT picture and create the analyzed object geometric model.

进行网格剖分首先要建立分析对象的几何模型，鉴于本文的分析对象是医学脑CT扫描图像，为此采用数字化仪从脑CT扫描图像中提取边界特征点，以此形成分析模型的边界轮廓，从而建立分析模型的几何模型。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。