几何约束

几何约束与影像分割相结合的快速半自动房屋提取

House Semi-automatic Extraction Based on Integration of Geometrical Constraints and Image Segmentation

最后，本文从视频编码的角度研究了序列图像间的几何约束，主要是序列中两幅图像之间的对极几何约束和三幅图像之间的三线性约束。

Finally , geometrical constraints in image sequences , mainly including Epipolar geometry and Trilinear constraint , are studied from the view of video coding .

几何约束条件在变形B样条曲线造型中的实现

Realization of Geometry Constraints in Deformable B-spline Curve Modeling

几何约束条件下的变形B样条曲线光顺拟合

Fair Fitting of B-spline Curve with Geometry Constraint Condition

一个非凸几何约束的Plateau问题之存在性

The Existence for a Plateau Problem with Nonconvex Geometrical Constraint

三维人脸标志点定位方面，提出了一种基于连续ShapeIndex特征和几何约束的标志点定位方法。

In the part of " feature points location ", a method based on continuous Shape Index and geometric restriction is proposed .

有理Bézier曲线的几何约束修改

Modification to the shape of rational B é zier curve with geometric constraint

提出用CAD约束和尺寸驱动技术分析平面机构的运动.采用CAD的几何约束、尺寸约束、尺寸方程和尺寸驱动技术，构造一些典型平面连杆模拟机构。

By using the constraint and dimension driven concept in CAD software , some type of simulation for planar mechanisms is created .

针对在基于物理变形的B样条曲线造型中施加几何约束的问题，提出了基于自由度转换的解决方法。

In order to solve the problem of B-spline curve modeling based on physically deforming with geometry constraints , a method of freedom degree transformation is presented .

几何约束下TIG焊焊枪姿态研究

Research of pose of TIG welding gun under geometric restriction

基于约束的设计在现代CAD系统中占据着越来越重要的地位，几何约束满足技术则是其关键与核心。

Constraint based design is now playing an increasingly important role in modern CAD systems , while GCS ( Geometric Constraint Satisfation ) is its key technique .

最后，基于上述研究，我们运用面向对象的设计方法实现了一个二维参数化设计系统，为构造全约束的CAD系统提供了技术基础，此系统体现了几何约束的动态管理思想。

Finally , based on the research above , the author accomplishes a 2D parametric design system with the help of oriented-object thinking to support full-constraint CAD system .

本文利用DM分解算法和吴方法从代数可解的角度给出一个确定几何约束求解中参数的有效范围的算法。

This paper proposes a new parallel technology , which is based on DM-decomposition to solve the problem of geometric constraint .

SolidWorks具有几何约束和尺寸驱动等参数化设计功能，及支持鼠标动态拖动。

Solidworks possess the abilities of geometry restriction , dimension drive and supporting mouse dynamic drag .

先采用CAD的几何约束、尺寸约束、尺寸方程和尺寸驱动技术，构造平面3-RRR3自由度机器人的模拟机构。

By adopting the geometric constraint , the dimension constraint and the dimension driving techniques of CAD , the simulation mechanism for planar 3-RRR robot with 3-DOF was firstly constructed .

使用C++和C语言建立零件的装配关系库和几何约束识别算法，实现了在系统中零件进行装配时装配关系和几何约束关系的建立。

The use of C + + and C language to build the assembly relation database and the geometric constraint recognition algorithm , Implements the system of parts for assembly assembled relationship and geometric constraint relationship .

换一种提法是，虽然边界约束DT能够满足边界几何约束，但不能保证严格满足边界拓扑约束。

So boundary constrained Delaunay triangulation satisfy boundary geometric constraint , but can not strictly satisfy boundary topology constraint .

研究内容如下：（1）基于CAD几何约束和尺寸驱动技术，提出建立并联机器人模拟机构的计算机辅助几何法，研究了相关的基本理论；

By using the geometric constraints and dimension driving techniques in CAD software , a novel computer aided geometric approach is put forward for designing the computer simulation mechanisms of parallel manipulators .

介绍了塑料注射成型模具CAD软件中变量装配的关键技术，并给出了装配设计中几何约束和工程约束实例。

The key technology of variable assemble in CAD software for plastic injection mold is introduced . Examples of the geometry restrains and the engineering restrain in the assemble design are given .

变量化技术是当代CAD技术的核心，以实现变量化设计为目的的几何约束求解有多种方法，但它们都存在一定的局限性。

Variational design is the kernel of contemporary CAD technology . There are many solving methods for geometric constraint solving at the aim of variational design , but they all have some limitations .

并运用AutoCAD二次开发技术，将几何约束求解器CBA和CAD绘图平台有机结合，实现全参数化绘图。

Finally , the fully parametric drafting system is realized by organically integrating the geometric constraint solver ( CBA ) and AutoCAD based on the second development technology for AutoCAD .

研究了基于几何约束的Bézier曲面优化问题，对单点和多点约束的问题，提出了一种通过修改控制点的约束优化方法。

This paper investigates the optimal shape modification of B é zier surfaces by geometric constraints . A constrained optimization method based on changing the control points of the surfaces is presented in this paper .

基于最优控制理论原理和Navier-Stokes方程，研究了气动/几何约束条件下多设计变量的翼型气动优化设计问题。

Based on the optimal control theory and Navier-Stokes equations , aerodynamic design of airfoil with multi-constraint conditions , such as aerodynamic and geometric constraint conditions , is studied .

基于偶图的DM分解的判定算法，可以判定几何约束问题的欠、过、完整约束性，并可以确定欠、过约束发生的位置。

The arithmetic , which based on the DM decomposition of bigraph , could distinguish the problem is under , over or complete constraint and find the position , where under or over constraint happens .

第三章：研究了MDT的约束机制，分析了MDT支持的三种约束：尺寸约束、几何约束和装配约束的特点。

In the third chapter , the constraints mechanism of MDT is studied . Dimension constraints , geometric constraints and assembly constraints of MDT are analyzed .

在最优设计中，桥梁的性态约束和几何约束都是根据AASHTO来确定的。

All behavior and side constraints specified in the AASHTO bridge code are considered in the optimum design process .

结合ISO／TC213的特征类型和变动几何约束理论，提出了面向尺寸链的变动几何约束网络及其生成方法。

Combined with new feature type defined by ISO / TC 213 and Variational geometric constraints ( VGC ) theory , a kinds of Variational geometric constraints network ( VGCN ) faced to dimension chain is proposed .

本文的方法同样适用于波色-爱因斯坦凝聚中的拟晶格孤立子（Proposedlatticesolitons）存在性的研究。另外，本文的第三部分应用山路引理研究了二维几何约束磁墙模型解的存在性。

Finally , Our approach also can be applied to research the proposed lattice solitons in Bose-Einstein condensates . Besides , In this paper , the third chapter uses Mountain Pass Lemma to proof existence of solutions in two-dimensional geometric constraint magnetic wall model .

目前主流的CAD软件都是基于参数化或变量化的特征造型系统，而在特征造型系统中特征修改后的有效性维护是特征造型的关键性问题，几何约束求解技术是最重要的技术之一。

The current mainstream CAD software is feature modeling system based on the parameter or variable-oriented , but in the feature modeling system , the effectiveness of the modified feature maintenance is the key to the feature modeling . Geometric constraint solving technology is one of the most important technologies .

该算法的特征检测器和描述符均采用SIFT算子，使用稳定性好和准确率高的对极几何约束去除误匹配点对，利用相关系数微调匹配点对。

SIFT operator is used as both the detector and descriptor of SIFT-based image registration algorithm . Using epipolar geometry , which has good stability and high accuracy , removes false matching points . Then , fine-tune the matching points using correlation coefficients .