This model could capture geometric constraints effectively and distinguish user's intentions automatically in the process of drawing graph theory so as to realize parametric design of apparel pattern. 此模型能有效捕捉并自动识别服装制板过程中反映用户设计意图的几何约束关系,实现服装纸样的参数化。
Influence of Geometric and Graph Theoretical Measures on Land Classification Using High-Resolution Remote Sensing Images 几何和图论特征对高分辨率遥感影像土地利用分类的影响
Automated geometric deduction is the core of intelligence CAD technology. By using computer, the automated geometric deduction generates graphs satisfying the aim of designer automatically, and can provide the graph which is created automatically when the constraints are changed with the modifying of some results. 几何自动推理是智能化CAD的技术核心,几何自动推理是指利用计算机,自动生成满足设计者意图的图形,它能够提供因修改而导致约束改变时图形的自动生成。
To Solve Drawing Geometric Graph Problems With Oblique Projection 用斜投影解决画法几何图解问题
After tracing and analyzing the geometric structure of control system block diagram, thereby the corresponding topological structure is generated by graph analyzer. 图形分析器通过对控制系统方框图的几何结构进行跟踪探索和结构分析,生成相应的拓扑结构。
The parametric geometric model of product based on constraint is set up, and the solving model based on constraint network graph for the product geometric model is proposed; 通过对几何约束系统的简化,建立了基于约束的产品几何模型及其存储结构,并提出了基于几何约束网络图的产品几何模型的求解模型。
In geometric transformation of a matrix Chinese character, the continuity of its graph would be lost if a raster point ( pixel) is transferred into a new one just as in vector-mode. 对点阵汉字实施几何变换,若以象元(栅格点)为单位,简单地按矢量变换(即一一对应)方式处理,会破坏汉字图形的连续性。
It relates to the concept, system, geometric model, graph function, artwork of CAD, and the development of some new concepts and new technologies. 涉及到CAD/CAM的概念、系统、几何模型、图形功能、计算机辅助设计工艺过程以及相关新概念和新技术的发展。
Implementation of Model of Network Geometric Graph for Traffic Plan Support Software 交通规划支持软件中网络几何图形模型的实现
A promising approach to processing geometric constraints ambiguity based on the comprehension of graph has been put forward. 提出一种基于图形理解的几何约束二义性处理的自组织方法。
Finally, we carried out a comprehensive analysis of the features of all kinds of defects, and succeeded to represent geometric features of four types of defects in a graph, which helps to further pattern recognition. 最后,对各种疵点特征值进行了综合分析,用聚类分布的几何形状特征可以有效地表征四类疵点,为进一步的模式识别奠定基础。
The hierarchy and representation of geometric constraints, the Geometric Constraint Graph ( GCG) and the Secondary Constraint Graph ( C2) are proposed to represent solid models. The design intent is embodied in the GCG and the C2. 本文讨论了几何约束的层次性及其表示,并且对几何约束同设计意图的关系进行了研究,提出了基于CSG/GCG/B-rep的模型表示。
Interactive Geometric Graph Modelling 交互式几何图形造型
2D geometric constraint modelling based on graph structure 基于图结构描述的几何约束模型的研究与建立
While clipping the line and arc segments with the window in a plane geometric graph, we discuss the condition of crossing, the getting of the effective crossing point and a kind of rapid way to judge the visibility about an end point on the clipped segment. 在以图形块为窗口对直线段和圆弧裁剪的过程中,讨论了窗口边(直线段、圆弧)和被裁剪线段的相交条件,有效交点的获取和被裁剪线段端点可见性的快速判断方法。
The main work should include the module of traffic network geometric graph, index of line segments, graphic database management and BP tree's application in the module. 主要内容包括:交通网络几何图形人机界面模块TNGM、线段检索与图形数据管理、BD树在TNGM中的应用。
Based on analyzing the relationship between functional surfaces and associations and geometric tolerances, a representation method of geometric constraints is presented based on the graph theory. 在分析和讨论功能表面及其联系与形位公差之间的关系的基础上,探讨了基于图论的几何约束的表示方法;
It can be used to split nonregular geometric graph and complex continuous one, to generate triangle element and quadrangle element, and to regularize the element. 该算法可以同时生成三角形单元和四边形单元,还能对单元形状进行规则性调整。
This paper analyses the geometric significance of improved Coates Graph and gain formula and introduces a method to obtain the flow graph directly from network. A comparison is made by the author between the improved Coates Graph and Mason Graph. 本文对改进的Coates图及增益公式的几何意义进行了分析,并介绍了直接从网络获得流图的方法,同时与Mason图进行了比较。
The general geometric constraint graph based on assembly features presents a clear model for solving geometric constraint satisfaction problems and avoids the shortcomings of hypergraph and fuzzy characteristics commonly met in the ordinary geometric constraint graph. 基于装配几何特征的广义几何约束图,避免了传统几何约束图的超图性质和模糊性,为几何约束满足问题提供了一个清晰的分析模型。
With the spline curve as the basic element of 3D garment design, three relations: same-point, symmetry and self-symmetry are firstly introduced as the constraints of garment geometric elements, then a constraint graph is established to describe the relations of garment geometric elements. 采用样条曲线作为基本几何元素,建立了三维服装几何约束关系。以此为基础构造了三维服装的约束图,有效地表达了几何元素及其相互关系。
When graphs are decomposed, the system deduces productive rules and decomposing operations to, be used from geometric properties of the graph so that better graph decomposition can be obtained. 图形分解时,系统根据当前图形的几何特性,推断出要应用的产生式规则和对图形要施加的分解操作,因此可以得到一个较好的图形分解。
Based on the features of garment, three relations are firstly introduced as the constraints of garment geometric elements, then a constraint graph is established, which describes the relations of garment geometric elements. 以约束关系为基础,建立面向服装的几何约束图,有效地表达服装几何元素及其相互关系。
This paper proposes a parametric patter-making model based on the geometric constraints graph, builds the data structures and accomplishes constraint solving algorithms. 本文提出了一个基于几何约束图的纸样参数化制板模型,并给出模型的数据结构和约束求解算法。
This model is created dynamically based on the process of a pattern design, to extract geometric constraints that exist in the pattern, analyzed and summarized this relationship, and give the establishment of geometric constraint graph and solution method. 此模型根据服装设计过程动态建立,在交互式制板系统的基础上,提取服装纸样中存在的几何约束关系,分析归纳,建立几何约束图,最后给出求解方法。
To improve efficiencies of freeform feature modeling, a geometric constraint solving algorithm of semantic feature modeling was presented in this thesis. In this algorithm, feature dependency graph was analyzed to recognize tetrahedron and triangle sub-problems. 为提高自由特征建模效率,提出一种语义特征造型中针对自由特征几何约束问题的求解算法。
The method of representation ( geometric representation) was researched. Based on the model of feature primitives of multivariate graph information, the graph feature primitives is extracted. 在基于多元图特征基元表示的一般化表示模型基础上,提取出了表征多元图的几何特征基元。
The usage of the methodology includes three phases: parts 'approximate geometric graph acquisition, reverse design and optimization of higher mode curve. 该方法分为:零件近似几何图形的获取、高次曲线的反求和优化设计三个阶段。
Because all geometric graph primitives in OpenGL are described according to their vertex, we not only have to access every Cell but also have to obtain coordinates of all points by GetElement() when we want to render a triangle. 由于OpenGL中所有的几何图元都是根据他们的定点(vertex)来描述的,因此要绘制三角形,除了要访问到每个Cell,还必须得通过GetElement()方法获得每个点的坐标。
Then an automatic individual pattern-generated system based on geometric constraint graph is designed and developed in order to generate individual patterns which fit customers 'body shape. 并设计了一种基于几何约束图的特殊体型服装样板自动生成系统,从而生成符合顾客体型的个性化服装样板。