cagd 中文意思是什麼

cagd 解釋
計算機輔助幾何設計
  1. 1 farin g. curves and surfaces for cagd - a pratical guide. 5th edition, morgan kaufmann publishers, 2002

    我們綜合利用廣義特徵向量擬合和距離函數，給出一種動態隱式曲線曲面重構的初值指定方法。
  2. Based on a systematic discussion on the contents, characteristics and the up - to - now accomplishments of these three operations in cagd, we present our researches in three ways as follows : ( 1 ) efficient evaluation for parametric curves and surfaces based on generalized ball bases based on the generalization of mathematical model of surface lofting program in the consurf system, two generalized ball surfaces and the recursive algorithms for evaluating them are given. furthermore, the conversion algorithms from bezier form of a surface to these two generalized ball forms are presented

    在系統地論述cagd中此三類運算的內容、特點、已有研究成果的基礎上，就以下三方面給出了研究成果： （ 1 ）基於廣義ball基的參數曲線曲面快速求值以前英國航空公司consurf系統機身模線程序數學模型的推廣為基礎，定義了兩類廣義ball基曲面，給出了求值的遞推演算法，推導了b zier曲面到這兩類曲面的轉換演算法
  3. And then we found and testified two examples, in which the connections in n - variable mean fam - ily, countable mean family and continuous mean family are shown. the theory in this paper prepares for the further application in convex analysis, numerical approximation, cagd, probability and statistics. etc

    文中還給出了連續平均族的兩個具體的實例，對這兩組平均族進行了證明，並找出了其中蘊含的連續平均族與可數平均族、 n元平均族之間的聯系等等
  4. Design examples of rfd, 2005. http : joo - haeng. etri. re. kr geolix bezierribfan. 3 farin g. curves and surfaces for cagd : a practical guide

    對于bezier曲線而言，它的肋形是從給定曲線中提取的另一種bezier曲線。
  5. Parameter form becomes mainstream of geometric design because of characteristic such as : simple construction, easy computation, etc. while near 20 years research illustrates implicit form has advantage that parameter one has n ' t. in this paper only the application and properties of implicit curves in cagd have been researched

    參數形式以其構造簡單，計算容易等特點而流行於世並成為幾何設計的主流，然而近20年的研究與使用經驗表明隱式形式也有參數形式無法比擬的優點，本文僅就隱式曲線在計算機輔助幾何設計中應用及性質進行了分析和研究。
  6. The widely used basis functions in cagd, such as bernstein, b - spline and nurbs basis, are all normalized b - basis

    Cagd中廣泛使用的表示曲線曲面的基函數，如bernstein基、 b樣條基、 nurbs基等均為規范b基。
  7. Normalized b - basis, namely optimal normalized totally positive basis, plays an important role in cagd, for it possess positive properties such as variation diminishing, convex - hull, affine invariance, tangency to the control polygon at the endpoints and b - algorithm

    規范b基即最優規范的全正基，因其具有凸包性、仿射不變性、最優保形性，端點插值性及b演算法等重要性質，在cagd中起著重要的作用。
  8. As the foundation of computer - aided geometric design ( cagd ), it is important to improve the way of the generating algorithms for curve and surfaces

    系統地討論了曲線曲面的逐點生成演算法，介紹了直線的一般生成演算法及該演算法的推廣演算法，並對其進行了改進。
  9. This thesis makes an in - depth study in three types of operations - evaluation for bezier curves and surfaces, offset approximation for bezier curves and rational bezier curves, degree reduction for nurbs curves and surfaces, all of which are of great importance in cagd researches

    本文圍繞cagd領域中的三類佔有重要地位的運算? ? b zier曲線曲面求值運算、 b zier曲線及有理b zier曲線等距變換以及nurbs曲線曲面的降階變換問題展開深入研究
  10. As a result of the require of cagd in airplane, automobile shipping and electrical appliance etc, fairing of curves and surfaces has become the hot subject in all over the world. this paper presents a new method for fairing of curves based on fitting the derivative of second order of curves. several practicality examples has been given to show the advantage of this arithmetic

    本文針對目前曲線光順演算法存在的問題，提出了一種採用最小二乘法來擬合曲線型值點列的二階導數曲線，然後通過兩次積分來反求光順曲線思想的曲線光順演算法，並給出了實際的算例來說明本文演算法的優越性。
  11. 11 gormaz r, laurent p j. some results on blossoming and multivariate b - splines. multivariate approximation : from cagd to wavelets, world sci

    由於只需要求解一個帶線性約束的最小二乘問題，因此該方法具有速度快，數值穩定性好的特點。
  12. 3 zhang c, cheng f, miura k. a method for determing knots in parametric curve interpolation. cagd, 1998, 15 : 399 - 416. 4 fritsch f n, carlson r e. monotone piecewise cubic interpolation

    文章以四組有代表性的數據為實例，通過定義節點用樣條函數方法構造三次參數樣條曲線，將新方法與向心參數化法修整弦長參數化法和二次精度方法進行了比較。
  13. Surface and surface intersection ( 551 ) is one of the key tasks in cagd

    曲面求交（ ssi ）是cagd中的一個重要課題。
  14. The degree reduction of parametric curves / surfaces is a key problem for computer aided geometric designed ( cagd )

    參數曲線曲面降階是計算機輔助幾何設計與製造中的研究熱點之一。
  15. From that time on, the idea of multi - resolution analysis has been widely applied to cagd and many achievements have been obtained

    從此，多分辨分析的思想被廣泛地應用到cagd中，並且取得了很多研究成果。
  16. The main results in this paper are as following : 1. summarize the develop and actuality of cagd. introduce the meaning and foreground in fairing of curves and surfaces

    在綜述幾何造型原理的基礎上，回顧幾何造型技術的發展趨勢和現狀，並介紹了曲線曲面光順技術的意義和發展前景。
  17. The importance that uses " geometric design and calculate ( gdc ) " rather than " computer aided geometric design " is explained. because the concept " geometric design " ca n ' t completely depict cagd which has not only the strictly mathematic theory but also the important applied background

    並在此基礎上說明了用「幾何設計與計算」這個概念來代替「計算機輔助幾何設計」的意義，這是因為僅有「幾何設計」的概念還不足以刻畫「計算機輔助幾何設計」這樣一個既有嚴格數學基礎又有重要應用背景的學科。
  18. This paper profoundly studies surface developablity on new a set of curves in the field of cagd and pays attention to the methods of developabe surface modeling and surface development on c - b zier curve. the research achievements and main contents are as follows : 1

    完成的主要研究內容和結果如下：一、回顧了可展曲面的概念和性質，系統敘述了cagd中可展曲面造型和復雜曲面展開方法的發展和理論及應用研究成果。
  19. At present, there is no cad / cam software for non - axisymmetric filament winding in china. this paper researches into method to design fiber paths of non - axisymmetric filament winding, generalizes splines in traditional cagd, successfully applies them to the fiber path design of winding elbows, presents mathematical principles and methods of winding elbows, and develops a cad / cam system for elbow fabrication

    本文研究了非軸對稱纏繞的纖維路徑設計方法，推廣了傳統cagd中的樣條技術，並成功地應用於纏繞彎管的路徑設計中；提出了復合材料彎管的纖維纏繞數學原理和方法，並研製開發了一套纏繞彎管cad cam系統。
  20. On the study of interpolation algorithm and cagd theory, two interpolation algorithms are analyzed, basic spline and nurbs interpolation, and thrice basic spline interpolation algorithm is proposed to realize path planning. the simulation of industrial robot is also important in the research of robotics, which displays the robot model on the computer screen and facilitates the devise of robot

    在機器人運動空間的插值演算法和計算機輔助幾何設計理論的基礎上，分析了兩種直接插值演算法： b樣條和nurbs曲線插值演算法，提出一種三次b樣條插值演算法來實現工業機器人運動路徑規劃，提高了插值的精度和計算速度。
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