查询词典 triangular bream

In this paper, according to the data format of surface in mechanics analysis software and based on computer aided geometric modeling, we present a novel intersection and trimming algorithm based on triangular discrete surface to realize the complex modeling of pneumatic membrane structure.

本文按照力学分析软件中曲面表示的数据格式，辅以计算机辅助几何造型的基础，提出了一种基于三角离散的曲面求交和裁减算法，实现了充气膜结构复杂外形的造型工作。

An approach to generate arc spline tool path of triangular mesh surface was proposed.

提出了三角网格表面数控加工圆弧样条刀轨生成方法。

It is proved that it can generate multi-axis NC machining tool-path for all kinds of triangular mesh surface models accurately and efficiently.

实例证明，该算法刀轨生成精度高，运行速度快，且适用于各种复杂三角网格曲面模型多轴数控加工刀轨的生成。

These two kinds of methods resolved many problems in modeling and make it feasible to build the model of triangular Bezier surface.

由于三角曲面对数据拓扑关系具有较宽的适应性和良好的保形性，使三角曲面特别适合于描述产品外形中自由曲面部分，这也正是逆向工程CAD建模中最难处理的部分。

The boiling behaviors on vertical surface and inside triangular channels were visualized with a digital video camera.

池沸腾时，气泡在加热表面产生、长大并自然脱离；当沸腾在有限空间进行时，气泡的生成和脱离受到限制，气泡会受到壁面的挤压而变形。

Based on these split models, some incontinuous problems during the process of approximating the triangular Bezier surface by a group of plane triangles were presented and solved.

提出了Bezier三角曲面在分割和线性近似过程中的不协调性判别法则和处理方法。

The original medical images are segmented after preprocessing, and the segmented objects are 3D reconstructed as triangular surface.

系统通过读取医学切片图像，在图像预处理、分割、表面重建、平滑与简化后生成解剖真实的几何模型和有限元网格。

According to the generated hierarchical information between three-dimensional data,we can construct the surface triangular grid and execute three-dimensional modelling on the object.

采用模板匹配的方法识别用户手势，采用容差环的方法识别用户输入的物体轮廓，根据生成的三维数据之间的分层信息构建物体表面三角网格，对物体进行三维建模。

This paper studied deeply on 3D reconstruction and visualization. Based on the detailed analysis of the MC algorithm, which is used for extracting Iso-surface from volume data field, this paper presented a new method of directional smoothing and triangular curved surface reconstruction.

为了在微机上实现较好的三维重建效果与理想的交互显示速度，本文主要研究内容和结论如下：首先，对三维重建与可视化技术进行了深入研究，在对用于从体数据场提取等值面的经典MC算法深入分析的基础上，提出了等值面方向平滑处理与三角B－B曲面重构方法。

Reverse engineering ; CAD ; triangular Bézier surface ; surface reconstruct

反求工程； CAD ；三角Bézier曲面；曲面重构

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。