Currently, feature is employed by most of the parametric solid modeling systems which are the kernel modeling system of the network-centric CAD systems.
目前网络CAD系统的核心造型系统大多是基于特征的参数化造型系统。
The solid modeling system is subsidiary to "Boiler CAD Application System". 3D Solid modeling is basis of FEM analysis and pipe line interference check.
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 disadvantage of the traditional formal languages is that they are used by people who possess a solid mathematical knowledge, but they are difficult to use for a modeling system.
传统规范语言的劣势在于，它们是由拥有稳固数学知识的人员使用的，使用它来建模系统很困难。
The technique system of intelligent sketching is presented, including the pen based natural gesture interface, free-hand sketching input, sketching recognition and sketch based solid modeling.
构建出智能草图的技术体系，包括基于单笔划的自然手势界面，徒手草图输入，草图识别与基于草图的几何建模。
In this way, we not only can guarantee vivid solid modeling, but also can save computer resource, and accelerate virtual CNC system running.
这样，既保证了逼真的实体模型，又节省了计算机资源，从而提高了系统的运行速度。
Furthermore, 3d - Sketch based solid creating, the management of 3d - Sketch in 3d - Modeling system and the parameterization of 3d - Sketch were discussed in this paper.
在此基础之上，对基于3维草图的实体生成及其在3维造型系统中的管理方式与参数化进行了研究。
The study of automatic exchange between modeling and data of 3-D solid modeling based on feature and dynamics system.
本文论述了基于特征的三维实体造型与分析系统之间的模型及数据自动转换的问题。
For the numerical simulation and mechanism modeling of combustion system involve the gas-solid flow principle, existing models are to complex to be suitable for design and optimizing of CFB unit.
循环流化床锅炉燃烧系统的数值模拟和机理建模涉及到对气固两相流方式下燃烧过程的理解和描述，已有的机理模型都十分复杂，不适合用于现场控制系统设计和优化。
For the numerical simulation and mechanism modeling of combustion system involve the gas-solid flow principle, existing models are to complex to be suitable for design and optimizing of CFB unit.
循环流化床锅炉燃烧系统的数值模拟和机理建模涉及到对气固两相流方式下燃烧过程的理解和描述，已有的机理模型都十分复杂，不适合用于现场控制系统设计和优化。
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