Firstly , the typical parts , such as sliding bearings , are selected for example , then sliding bearings " 3d models of different forms are showed to the users to master the overall sliding bearings " structure 首先选择典型部件滑动轴承为切入口，将各种形式滑动轴承的二维模型的结构展示给用户，使用户全面的掌握滑动轴承的结构。
Analysis on two - and three - dimensional thermal - field of the coupling model of piston assembly and cylinder , including steady analysis and transient thermal analysis with 2 - d and 3 - d model and the stress and the deformation under the action of thermal load 分析中包括了二维模型的稳态传热分析、瞬态传热分析和三维耦合模型的稳态传热分析、瞬态传热分析，以及附带的热应力和热变形分析。
A two - dimensional model is proposed for simulation of gas phase cracking of 1 , 2 - dichloroethane ( edc ) to produce vinyl chloride monomer ( vcm ) in tubular reactor furnace , in which side reaction of coke precursor formation is taken into consideration 摘要建立了二氯乙烷在管式反应器中进行气相热裂解的二维模型，模型考虑了二氯乙烷热解生成氯乙烯的主反应和生成焦前体的副反应以及气体密度变化对裂解反应的影响。
For the complex topographical tailings dam , neither the complicated and changeable seepage field nor the action of three direction seepage factors at the same time can be fully reflected in the two - dimension model ; as a result the real seepage field cannot be acquired 摘要对于复杂地形的尾矿坝，由于二维模型不能充分反映复杂多变的渗流域，也不能考虑到三个方向渗流因素同时作用的影响，从而无法体现真正的渗流场。
The overview of green - wave model , braking effect and steering probability effect were generalized on the basis of the existing research on cellular automata traffic flow model . the affection of many factors to be considered in the practical traffic system was summarized 在已有的交通流元胞自动机模型研究的基础上，对二维模型中的绿波模型、刹车效应和转向概率效应进行了综述，总结了在实际的交通系统中需要考虑诸多因素的影响。
Furthermore , in order to improve the reusability and adaptability , the paper emphatically studies the 2 - d model - based sort frame and identification mechanism of software component and also presents correlative algorithms applying to optimize the component reuse during the practical exploitation 为了提高可复用软件构件的复用性和适应性，本文重点研究基于二维模型的构件分类结构及识别机理，给出了表征特征集生成算法、表征特征集分层算法和继承树生成算法。
Researches the feasibility of parametric design based on 3d modals , though at present , the research on parametric design is one of focus in the researches on cad system , but current parametric design is mostly based on the 2d modals , the research on 3d modals is barely of starting 目前参数化设计研究是cad系统研究的热点，但参数化设计研究主要是基于二维模型的基础之上，对于三维参数化设计的研究只是处于起步阶段。据此，本文研究了三维模型参数化设计的可行性。
First , a simple model that a cyclinder with convex ring pulling in a tube is constructed using the ansys software , by computing and analysis of three different models , a general method can be get to resolve this sort of problems . then a complete projectile 2d model is established using autocad and converted to ansys through . sat data format , then a 3d solid model and finite element model is set up , and the properties are also defined in ansys . the next step is the dynamics analysis of the driver and body in the process 通过研究简化模型? ?带凸缘的柱体在圆筒中挤进过程，共对三个模型? ?二维挤进模型、凸缘在光膛圆筒中挤进的三维模型、凸缘在线膛圆筒中挤进的三维模型进行有限元分析，得到一个对此类问题的通用分析方法；然后，运用autocad建立实际弹丸的二维模型，通过sat接口程序导入ansys ，在ansys中进行前处理，包括生成弹丸实体、建立线膛实体、划分网格，设定单元、材料、接触的类型及其它参数，生成ls - dyna的
These equations are verified by the measure data in nantong section in yangtse river , and the results are satisfied . on the base of the vertical mixing law , the part depth homogeneous mixing 2d numerical model has been developed , and it was used in the concentration field calculation . by use of the measure data of rbodemine - b tracer in yangtse river estuary , the comparison of value calculated with data measured has been made 该模型去掉了传统的全场水深平均二维模型污染源一出排放口便在水深方向上均匀混合的假设，而将计算水域划分为污染物浓度在垂向上达到部分水深均匀混合及全水深均匀混合两个区域，并将上述有关部分水深均匀混合及全水深均匀混合的基本规律的研究成果应用该模型中。
This paper studied two - dimension model of rotor and cylinder and builded the finite element model . generally take the rotor and the cylinder as control objects ， definite their boundary conditions ， solute their temperature fields ， and then analyst their bear expansions and distortions as well as thermal stress distribute ， to control the courses ， and keep the unit the most optimum operating condition . and put the theories into practice developed by c + + program , used as the important part of the online monitoring and management system of life of the steam turbine 本文对汽轮机转子和汽缸的二维模型的进行分析，建立有限元模型；将汽轮机转子和汽缸作为控制对象，确定其边界条件，求解其温度场，分析其热膨胀、热变形以及热应力分布；采用c + +语言编制汽轮机高压缸、中压缸以及缸体的温度场实时在线监测程序,作为汽轮机寿命在线监测与管理系统的核心部分，用以指导汽轮机的启停及运行过程，使机组可以安全的、经济的运行。
