早期的企业应用程序使用数据库表和表之间的外键关系进行实体建模。
Early enterprise applications used database tables and foreign-key relationships between them to model entities.
三维建模有三种方法：线框建模法、曲面建模法及实体建模法。
There are three methods of modeling in three dimensions: wireframe modeling, surface modeling, and solid modeling.
但是，数据库实体建模者却只关注静态属性？操作对他们而言是非实质的东西。
Database entity modelers, however, concern themselves solely with the static attributes — the operations are immaterial to them.
水龙头提环实体建模与有限元分析对其结构设计和性能改进十分重要。
It is very important to improve structural design and performance of entity modeling and finite element analysis of the swivel bail.
虚拟制造；灌装生产线；实体建模；OPE机制； 虚拟漫游；
Virtual Manufacturing; Beverage-packaging Production Line; Solid Modeling; OPE Rule; Virtual Walkthrough;
采用ABAQUS非线性有限元分析软件对这两种结构形式进行实体建模。
Two kinds of structure models are built based on ABAQUS nonlinear finite element software.
为了与工程实际相符合，本文采用三维实体建模，几何尺寸与工程实际相符；
Three-dimensional solid modeling method is introduced in this paper for good result, and the geometrical size of the model is consistent to the true value.
借助MDT三维实体建模系统和面向对象的编程技术实现特征建模的系统原型。
Finally, the system prototype for the feature modeling is realized in the MDT system.
有多少设计是限于创造工具而被迫选择了正切的造型形式(比如有切线限制的实体建模软件)？
How many are tangentially sculpted because of the tools of creation (tangent-restricted solid modeling software)?
通过绘制实例，快速准确地利用AUTOCAD2006进行零件机械臂的实体建模。
Through the example, carries on the entity modeling of components mechanical arm fast and accurately use AUTOCAD2006.
用PRO - E软件对进气弯管，带分流叶片的叶轮及有叶片扩压器进行了实体建模。
Using software PRO-E to build the model of the impeller, diffuser with blade, entering air elbow, volute.
功能梯度材料实体建模过程中，需要对材料成分方程系数进行不断修改以满足设计要求。
During the modeling for functional gradient materials, one needs to modify continually the coefficient of material composition functions to satisfy the design requirements.
在治理框架的环境中，对各种组织实体建模，并且就权力和决策制定而言，定义他们互相之间的关系。
Within the context of the governance framework, the various organizational entities are modeled, and their relationships to each other, in terms of authority and decision-making, are defined.
利用三维建模软件对振动筛进行实体建模，并利用有限元方法，对模型结构进行合理简化。
The so1id models of vibrating screen have been built by using 3D software and predigested by using finite element method.
本文提出了基于变量和表达式定义的三维实体建模方法，并采用这个方法实现了一个模板工具。
The thesis develops a method of solid modelling based on defining variables and expressions and implements a template tool.
齿廓曲线尤其是齿根过渡曲线的构建是渐开线圆柱齿轮三维实体建模的难点，也是其关键问题。
The model of gear profile curve and gear transition curve are the difficult but key point of gear 3d solid model.
国名经济动员预案演练系统中，医院实体建模与仿真的目的是模拟医疗抽组预案的制定和执行过程。
The purpose of modeling and simulation of hospital entity in the national economy mobilization pre-draft exercising system is to simulate the enacting and executing process of the medical pre-draft.
本文以蜗杆、蜗轮及分度凸轮等具有空间曲面轮廓的蜗杆类零件为研究对象，探讨了该类零件的实体建模问题。
This dissertation focuses on the solid modeling of the Worm-Type Parts, such as the worm, worm wheel, indexing CAM, and so on, which has spacial surface.
讨论了仿真系统的译码器、基于特征的加工数据库、实体建模以及仿真驱动等组成模块实现的关键技术和方法。
The overall architecture of the system consisted of code interpreter, modeling module, feature database of turning based on STEP-NC and simulation drive is established.
锅炉三维造型系统是锅炉CAD应用系统的子系统，三维实体建模是进行有限元分析和空间管路干涉检查的基础。
The solid modeling system is subsidiary to "Boiler CAD Application System". 3D Solid modeling is basis of FEM analysis and pipe line interference check.
目前带压密封夹具设计理论存在一定缺陷，本文分析并指出在UG软件环境下进行夹具设计和实体建模的优越性。
This article analyzes the limitation about the design theory of the on-line pressure sealant clamps and the advantage of the clamps design and modeling at platform of UG.
为了简化该实例，我们将只为 BankAccount的几个属性和TransactionHistory实体建模。
To simplify the example, we will model only a few attributes of the BankAccount and TransactionHistory entities.
采用采矿特征库进行矿山三维建模，可极大地降低矿山工程人员的技术要求，显著地简化矿山建模的过程，提高矿山实体建模的速度。
Adopting the mining feature library greatly reduce the technique requirement on mining engineers, obviously simplify the mine modeling process, thus greatly enhance the speed of solid mine modeling.
运用ANSYS软件对空心板桥水泥混凝土铺装层进行实体建模，并针对铺装层破坏形式开展力学分析，提出铺装层破坏的解决办法。
ANSYS software is used to make a substantial pattern of hollow concrete slab lay. Solution is put forward to solve the damage to the lay by mechanical analyzing of the damage style to the surface lay.
利用UG软件对运煤车进行实体建模，在AD AMS软件中对运煤车进行动态仿真，对其起动转矩和几个关键部分的受力进行了分析。
This paper built the solid model of a coal car with UG software, made dynamic simulation by ADAMS, and measured the starting torque and the forces on several key parts of the coal car.
综合利用三维实体建模技术与数据库技术，在计算机仿真模型中，构建了包括毛坯、刀具、夹具及机床等部件的“真实”数控加工仿真环境。
The nc machining simulation environment, including roughcast, tools, fixture and machine tool modeling, is constructed in computer by combining three-dimensional entity modeling and database method.
研究的具体思路为：利用专业三维CAD软件进行实体建模，然后通过与CAD软件进行信息交换来得到实体信息并进行实体重现，以找到一种替代实体建模的方法。
The main idea of this paper is to find a way to reduce the work of development of solid modeling for FEA software by exchanging information with CAD software.
对于传统的建模技术，例如实体关系图或数据流程图，没有可用的特定测试技术会过时。
For traditional modeling techniques, such as entity relationship diagram or data flow diagram, no specific test techniques are available to date.
这些分组增强了建模实体的可复用性。
These groupings increase the reusability of the modeling entities.
这些分组增强了建模实体的可复用性。
These groupings increase the reusability of the modeling entities.
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