The history and representative work of methods of the developable surface modeling and surface development in the field of CAGD are briefly reviewed.

二精品性欧美牲交在线视频、推導(dǎo)出了三次C-B黄片一区二区三级？zier曲線導(dǎo)矢計算的簡潔公式日韩美乳精品无码福利视频，證明了B日日射人人操？zier曲線的速端曲線性質(zhì)對C-B？zier曲線不成立亚洲欧美日韩精品久久不卡。

This method presented in this paper can save a lot of time in drawing the developable surface, increase the productive efficiency and the accuracy of blanking , and can be applied to all dinds of expansion of developable surface, zoom the dimension.

該方法可大大縮短可展曲面展開圖的繪制時間在线看片91，提高生產(chǎn)效率及展開下料精度，適用于各種類型可展曲面的展開摸下面嗯啊网站，并可進行尺寸縮放等相關(guān)操作美女被狂cao，具有較好的實用性和經(jīng)濟價值

Furthermore, by the design method that a developable surface is an envelope surface, we give detail analysis of examples about using the same control planes to design developable surfaces.

討論了所設(shè)計可展曲面的特點和幾何構(gòu)造，研究結(jié)果表明台湾乡下A片免费看，所提出的設(shè)計方法具有現(xiàn)有曲線設(shè)計方法的特征国产麻豆视屏，現(xiàn)有的對于曲線的一些幾何構(gòu)造技術(shù)可延伸到可展曲面的設(shè)計。

A surface that can be unfolded or unrolled into a flat plane or sheet without stretching, tearing or shrinking is called a 'developable surface'.

一個可以在沒有拉伸A一级毛片A一级黄片、撕裂或收縮的情況下展開為一個平面或平面區(qū)域的面久久免费影院，被稱為可展面。

Finally, the complex surfaces are developed by partition of the surfaces into small surface segment ,and approximation of the small segment with the developable surface between two Bezier curves.

最后黄色稳定视频资源在线观看，采用分片與近似的思想黄色免费a片短视频，給出了復(fù)雜曲面展開的算法，并提出由曲面面積和曲面展開面積的相對誤差調(diào)節(jié)分片程度來滿足精度要求日韩美女福利网址在线观看视频免费。

Based on the important idea of duality between plane and point geometries,two direct explicit methods of computer-aided design for developable surface s were proposed,the developable surface s were represented using control planes with appropriate basis functions.

為了克服傳統(tǒng)方法在可展曲面設(shè)計上的缺陷欧洲激情一区二区三区视频，方便地解決工程中經(jīng)常遇到的可展曲面位置和形狀難以調(diào)整和控制的問題，基于3D射影空間中點和平面間的對偶性這一重要思想天天综合色一级毛片，提出了兩種直接中文字幕网第一页、簡單的可展曲面設(shè)計方法。

It order to overcome the difficulties in representation of developable surface s utilizing traditional approaches,based the concept of duality between points and planes in 3D projective space, a direct explicit method of computer-aided design for developable surface s was presented.

基于三維射影空間中點和平面間的對偶性色色色色色色色色色色色色色色色色色色色色，提出了計算機輔助設(shè)計五次樣條上可展曲面的一種簡單且有效的方法中文字幕日韩精品视频一区，通過采用該方法，可利用具有B啨zier和B樣條基的控制平面設(shè)計可展曲面黄污视频免费网站。

In wire-cutting manufacturing of the top and bottom different curve,accomplishing cutting way of ellipse bias changing curved surface which between two plane curve into developable surface in order to calculate NC program of four axis ganging.

在上下異型工件的線切割加工中激情图区自拍偷拍，宜采用橢圓偏置切割法爱搞精品，即將上、下兩平面曲線間的曲面變成可展直紋面国产精品亚洲一级视频，進而計算四軸聯(lián)動的數(shù)控程序性刺激的欧美三级视频中文第一页，可保障加工的效率與效益。

Though the analysis of the convexity of the front surface, this paper gained some terse and practical results.We can control the shape of developable surface through adjusting corresponding plane curves.

本文通過對上述兩種可展B樣條曲面進行保凸分析情草视频在线，得到了一些簡潔，適用的結(jié)論：只要調(diào)整相應(yīng)平面曲線亚洲乱伦高清无码，就能控制可展面的形狀天天操天天怕天天日天天。

Bout this Aumann[8] has provided some methods,connecting lines between two boundary curves,shaping ruled surface, and adding some developable conditions to ruled surface.

umann提出的方法是在兩邊界曲線之間連直線，形成直紋面一级爱爱视频免费观看，然后給直紋面加上可展條件国内外激情视频在线播放。