Algebraic curve is commonly used in CAGD. Traditional curve interpolation is in various forms of spline fuction. Although better result can be obtained by spline curve, the former two of elliptic, hyperbolic and parabolic shapes can not be represented by spline curve. An exploring research in this aspect is made in this thesis.

代數(shù)曲線是CAGD中經(jīng)常用到的曲線成人版麻豆无线视频在线看免费，以往的曲線插值基本上是采用樣條函數(shù)的形式，采用這種形式雖然能夠獲得很好的效果人人操人人干人人做，但樣條函數(shù)所能表達(dá)的形狀都是拋物線型欧美一级久久，對(duì)橢圓型與雙曲線型曲線的表示是無能為力的。

The cubic algebraic curves (the Bezier curve and B style curve, etc belong to the parameter curve) is apter to realize the curve transition and fitting to dispersed data than the cubic parametric curves.

比如參數(shù)曲面與平面的交線就是一條平面代數(shù)曲線欧美日韩国产在线mv；平面參數(shù)曲線的等距曲線也是一條代數(shù)曲線www.taohongbei.com。

In the term of unloading and opposite side loading, let the stress-strain curve have the same form of skeleton curve, the curve uses the last unloading point as its starting point, and uses soil's ultimate stress level as its asymptote. Then the hysteretic curve is constructed.

在卸載和反向加載時(shí)，采用與骨架曲線相同的函數(shù)形式亚洲二三区，并以前一次卸載開始點(diǎn)作為起點(diǎn)一级A片一级毛片一级人6，以土體的極限應(yīng)力水平作為漸近線，構(gòu)造出土體動(dòng)力本構(gòu)模型的滯回曲線谁有黄色网站久久久。

A novel design scheme for digital optical switch with high extinction ratio by employing S curve waveguide at the end of the Y branch ii proposed. Higher extinction ratio then that of the device without S curve waveguide is obtained by applying certain synchronous voltage to tie Y branch and the curve electrode of tie S curve waveguide.

文章提出一種關(guān)于非對(duì)稱電極低串?dāng)_數(shù)字光開關(guān)的新型設(shè)計(jì)方案日韩主播欧美精品视频，在Y分叉后端引入S彎曲波導(dǎo)，通過在Y分叉處的非對(duì)稱電極和彎曲波導(dǎo)的彎曲電極處施加一定的同步電壓国产小视频网址，實(shí)現(xiàn)了比沒有S彎曲的開關(guān)更低的串?dāng)_欧美偷操。

Curve C at the spot P(x0, y0) curvature is the maximal circle of the curve C tangency at the spot P(x0, y0). Contrail curve G of the center D of curvature circle entitles evolute of curve C.

曲線C在點(diǎn)Px0，y0）曲率圓是與該曲線C相切于點(diǎn)P(x0AV网在线www观看，y0的最大圓欧美福利二区，曲率圓的圓心D的軌跡曲線G稱為曲線C的漸屈線。

Carried out generalized Mises yield criterion , yield curve on the n flat face was circle curve, and different elected parameters correspond to external angular point circumcircle免费看色网站、 internal angular point circumcircle and incircle of Mohr-Coulomb unequiangular hexagon. According to unequiangular hexagon, circle yield curve which had the same area as hexagon can be found, and corresponding yield criterionwas equilateral circle yield curve.

3廣義米賽斯準(zhǔn)則在π平面上的屈服曲線為圓曲線人人看人人摸人人干，選擇的參數(shù)不同對(duì)應(yīng)有莫爾—庫侖不等角六邊形的外角點(diǎn)外接圓，內(nèi)角點(diǎn)外接圓和內(nèi)切圓欧美日韩xxxx，對(duì)于不等角六邊形A片一级毛片，還可以找到一個(gè)面積和六邊形相等的圓屈服曲線，對(duì)應(yīng)的屈服準(zhǔn)則為等面圓屈服曲線一级特黄A片在线观看。

First, the relative curvature of a certain curve at its first end and the directional angle of the first port tangent vector of that curve as well as the weight factor of the interpolation curve are given, then all the other control vertexes can be gotten by using the conditions of G continuity, and a method to construct transitional curves is also introduced so that we can get the closed interpolation curve which achieves G continuity globally.

首先給定某段曲線的首端相對(duì)曲率和該段曲線的首端切矢量的方向角以及插值曲線的權(quán)因子一级a片麻豆，然后利用G2連續(xù)條件求出其余控制頂點(diǎn)，并給出了構(gòu)造過渡曲線的方法免费一级A片国产在线观看，得到了G2連續(xù)的閉插值曲線无码中文字幕A片在线。

The properties of the new method are that (1) the equations that the quartic Bézier curve has to satisfy for being C 2 continuous are strictly row diagonally dominant;(2) the discontinuous points of the curve are at the given data points;(3) the curve is locally adjustable;(4) if the given data points are convex, the constructed quartic Bézier curve is convex.

用樣條函數(shù)方法構(gòu)造插值樣條曲線曲面，曲線曲面的精度和形狀是由給定的數(shù)據(jù)點(diǎn)和端點(diǎn)條件唯一確定的亚洲超清黄色视频在线观看。在有些情況下老夫妻性交免费视频，例如，對(duì)文獻(xiàn) [7～ 9]中的數(shù)據(jù)點(diǎn)集www.zmjzk.com，由樣條函數(shù)方法構(gòu)造的C2 插值曲線是不可接受的国内揄拍国内孞精品人妻浪潮AV，但由于沒有額外自由度全网黄网站免费观看，無法調(diào)整曲線的形狀。

A method of construct a quadratic uniform B-spline curve through data points is given.If the relative curvature of a certain curve on the first control point and the direction angle of the first port's tangent vector is given,here can get the whole curve by using the character of the port of quadratic uniform B-spline curve.

提出了一種二次均勻B樣條插值曲線的構(gòu)造方法影音先锋av下载，首先給定某一段曲線首點(diǎn)的相對(duì)曲率和該段曲線的首端切矢量的方向角人人操,人人摸,人人性爱，利用二次均勻B樣條曲線的端點(diǎn)性質(zhì)，求出其余各段曲線控制頂點(diǎn)涩涩毛片在线视频看看，來生成整條插值曲線无码日韩少妇爆乳视频迅雷下载。

Basing on the 3D image data compression and in accordance with the structure characteristics of 3DLCS scanning data that the scanning data set of 3D surface can be considered as a curve set in 3D space, the thesis extends 2D curve Splitting compressing method to the 3D space and presents a 3D curve compressing method based on the curve compression and the color information compression. The 3D compressing effect is better.

在三維圖像數(shù)據(jù)壓縮方面，根據(jù)3DLCS的掃描數(shù)據(jù)結(jié)構(gòu)特點(diǎn)（即可以將三維表面掃描數(shù)據(jù)集看作一個(gè)空間曲線的集合）色妞网视频二区视频，將平面曲線壓縮中的Splitting方法推廣到三維情形特级无码黄片，提出了一種基于曲線壓縮和彩色信息壓縮的三維數(shù)據(jù)壓縮方法，取得了較好的壓縮效果日韩亚洲欧美精品一二区。