In this dissertation, the best simultaneous approximation with weight to infinite sequence from simultaneous-suns in complex normed linear space is considered, and in the case when the weight satisfies a certain condition, the characterizations of approximation from a simultaneous-sun and uniqueness of approximation from a RS-set are obtained; moreover, in the case when the weight is free, the characterizations of approximation to a totally bounded sequence from a convex set are established.

本文在復(fù)賦范空間中研究了同時(shí)太陽(yáng)集對(duì)無(wú)限序列的加權(quán)同時(shí)逼近問(wèn)題日韩婬乱a一级毛片多女韩国A片，在權(quán)滿足一定條件時(shí)，通過(guò)把所研究問(wèn)題轉(zhuǎn)化為連續(xù)向量值函數(shù)空間中相應(yīng)集對(duì)一個(gè)上半連續(xù)函數(shù)的最佳逼近問(wèn)題黄色色色色色色色，得到了逼近的特征和RS集逼近的唯一性定理国产AAA级毛片A片，有例表明它們是已有結(jié)果的本質(zhì)推廣；在權(quán)不受限制時(shí)黄色视频一区二区免费，得到了凸集對(duì)全有界序列逼近的特征av人人摸人人操人人舔。

The author investigates simultaneous approximation by Gama operators and the rate of pointwise convergence by new Gamma type operators.

本論文討論了Gamma算子的同時(shí)逼近，Gamma算子線性組合同時(shí)逼近的等價(jià)定理以及新的Gamma型算子的逼近速度先锋影音你懂的。

The close relationship between the Hybrid polynomial approximation and the classical Hermite polynomial approximation to rational curves and surfaces are studied, Hermite approximation is in fact a special case of Hybrid approximation. The sufficient and necessary condition for the convergence of Hybrid approximation to rational Bézier surface is deduced and proved.

圍繞著有理曲線曲面的Hybrid逼近自拍小视频福利在线，作者研究了有理曲線曲面的Hybrid多項(xiàng)式逼近與傳統(tǒng)的Hermite多項(xiàng)式逼近之間的密切關(guān)系，并指出Hermite逼近事實(shí)上是Hybrid逼近的一種特例高清无码在线黄色视频，此后演繹并證明了有理Bézier曲面的Hybrid多項(xiàng)式逼近收斂的充分必要條件欧美性爱黑人A片。

In this paper,a rational approximation method of the norm of parametric speed is given,which is more effective than the polynomial approximation.

文章根據(jù)等距曲線逼近的關(guān)鍵在于對(duì)其參數(shù)速度模的逼近，提出了對(duì)參數(shù)速度模有理逼近的2種形式国外超碰97人人爽人人做，在此基礎(chǔ)上給出了平面Bézier曲線等距曲線的逼近函數(shù)和誤差估計(jì)函數(shù)国内自拍av，并導(dǎo)出了保持法矢平移方向的代數(shù)方式的等距有理逼近算法。

The problem of parametric speed approximation of a curve is raised in this paper.

該文提出了曲線的參數(shù)速度逼近問(wèn)題国产精品美女久久久久AV，指出等距曲線逼近的關(guān)鍵在于參數(shù)速度的逼近国产无码AAA片，并用兩種方式來(lái)實(shí)現(xiàn)它。

The results are much better than the other approaches'. Then we give another method for approximating offset curves. The circle is first approximated by regular polygon within some tolerance. The exact offset curve is then approximated by the convolution of the regular polygon with a B-spline curve or a NURBS curve having the same degree.

與此同時(shí)作者從基圓的正多邊形逼近出發(fā)亚洲av永久无码天堂网不卡，通過(guò)求解包絡(luò)的技巧給出了等距曲線逼近的另一個(gè)算法国产精品另类熟女，可整體估計(jì)誤差，所得的等距逼近曲線為與基曲線同次數(shù)的B樣條或NURBS曲線高清一区二区三区视频，克服了國(guó)際上現(xiàn)有同類算法中逼近曲線次數(shù)幾倍于基曲線次數(shù)的缺陷色日韩一区二区。

The purpose of this dissertation is to study a principle or method to describe and analyze the complex problems with high gradients arising from practical engineering. The main contents cover:1. The Bezier function was introduced to approximate high gradient functions, and a suitable coupled function was derived. Some detail numerical results show that the Bezier-based function is dominant over other combination function such as polynominal and trigonometric series, when to describe a high gradient function.

針對(duì)工程中大量存在的高梯度問(wèn)題進(jìn)行函數(shù)逼近的研究，引入Bezier函數(shù)對(duì)高梯度問(wèn)題進(jìn)行函數(shù)逼近福利国产亚洲，構(gòu)成以Bezier函數(shù)為主的復(fù)合逼近函數(shù)色欲久久久天天天综合网，數(shù)值考證表明：與常規(guī)多項(xiàng)式插值函數(shù)的逼近及"冪／三角"復(fù)合函數(shù)的逼近相比，基于Bezier函數(shù)的逼近函數(shù)對(duì)高梯度問(wèn)題的描述具有明顯優(yōu)勢(shì)AA黄片A。

Direct and inverse theorems of approximation by this kind of operators are discussed, and the Jackson—type integral estimation of approximation and Steckin — Marchaud inequality of weak type of uniform approximation for these operators are obtained.

討論了一元Bernstein型算子的逼近正逆定理欧美成熟妇人高潮A片免费，建立了該算子逼近的Jackson型積分估計(jì)式和一致逼近的弱Steckin-Marchaud型不等式。

In this paper, a region approximation idea that means using a "fat curve" with a width to approximate the offset curve is proposed, and a complete set of algorithms to approximate offset curve using disk Bézier curve are given and implemented. In the algorithms, the optimal and uniform approximate curve of the offset curve as the central curve of the Disk Bézier curve is found by using Remez method, and then the upper optimal and uniform approximation principle is proposed to compute the error radius function of the Disk Bézier curve. Thus, the whole Disk Bézier curve can be obtained. In the end of this paper, the approximate effect of the Disk Bézier curve is not only analyzed and assessed, but also some specific examples are provided.

提出用一條帶寬度的"胖曲線"來(lái)逼近上述等距曲線的區(qū)域逼近思想一片黄色网站最好的，并建立與實(shí)現(xiàn)了圓域Bézier曲線等距逼近的整套算法无码免费无线观看在线视频，包括應(yīng)用Remez方法求出等距曲線的最佳一致逼近曲線作為圓域Bézier曲線的中心曲線，提出上控最佳一致逼近的原理求出圓域Bézier曲線的誤差半徑函數(shù)成人蕾丝电影在线播放视频免费，以及確定整條圓域Bézier曲線日韩侵犯精品视频在线观看网站下载，最后還對(duì)該圓域Bézier逼近的效果做了分析和考核亚洲国产污视频，并給出了一些具體實(shí)例。

In practice, the offset curve usually is approximated by lower degree rational polynomial cur ve in order to have the unified expression of data structure and geometric algor ithm in the commercial modeling systems.

通過(guò)用雙圓弧逼近表示 NURBS( non- uniform rational B- spline)曲線及其 offset日韩综合AV在线一区二区，并利用雙圓弧逼近的特有性質(zhì)AV原创在线，把 offset的雙圓弧逼近轉(zhuǎn)化為原曲線的雙圓弧逼近，簡(jiǎn)化了問(wèn)題的求解亚洲欧美熟妇综久久。