We investigate mainly solving the hyperbolic and parabolic equations by using the MQ quasi-interpolation. The underlying idea of our means is that: employing the derivative of the MQ quasi-interpolation to approximate the spatial derivative of the PDE, while the approach of the temporal derivative of the PDE is used a finite difference.

我們主要就MQ擬插值在雙曲型方程和拋物型方程中的應(yīng)用進(jìn)行了研究国产合集，其基本思路是：利用MQ擬插值的導(dǎo)數(shù)逼近微分方程的空間導(dǎo)數(shù)亚洲区欧洲区视频，而微分方程的時(shí)間導(dǎo)數(shù)則采用有限差分逼近。

In this dissertation, the following critical theoretical problems on local La-grangian numerical differentiation are studied: explicit formulas, local estimate for the remainder, and the highest order of approximation in the case that the values of the function at these interpolation nodes have perturbationsLagrangian numerical differentiation is a method that the Lagrange interpolation polynomialis differentiated to approximate the derivative, where Tn ={t_0,t_1,......

本文主要研究有關(guān)局部Lagrange數(shù)值微分法的一些關(guān)鍵性的理論問(wèn)題：公式的顯式表示欧美日韩一道精品视频一区二区三区，余項(xiàng)的漸近估計(jì)，以及在插值數(shù)據(jù)有擾動(dòng)的情況下综合精品国产孕妇专区，局部Lagrange數(shù)值微分法的最大逼近階人碰逼免费视频。

The arc data interpolation error by secant, tangent and chord, and the smallest error by secant mode is analyzed in this paper. The relation between the maximum radial error and arc radius and approach step-length in the secant mode of arc data interpolation in CNC system is detailed.

在分析數(shù)控系統(tǒng)圓弧數(shù)據(jù)插補(bǔ)割線方式較切線、內(nèi)接弦插補(bǔ)方式誤差更小的基礎(chǔ)上18se视频在线观看，討論了數(shù)控系統(tǒng)圓弧數(shù)據(jù)插補(bǔ)割線方式中最大徑向誤差與圓弧半徑和逼近步長(zhǎng)的關(guān)系www肏屄屄屄c0m。

The development of polygonal finite elements is discussed, including Wachspress interpolation, Laplace interpolation and barycentric coordinates.

論述了多邊形有限元的發(fā)展歷史，給出了多邊形單元上的Wachspress插值人人插插AV、Laplace插值和重心坐標(biāo)的一些最新研究成果6080电影网站午夜伦。

Approximating unknown function by barycentric Lagrange interpolation which has advantages of higher precision and good numerical stability, the barycentric interpolation collocation method for analyzing deformation and buckling load of ring is presented.

采用數(shù)值穩(wěn)定性好、計(jì)算精度高的重心Lagrange插值近似未知函數(shù)激情中文小说区图片区，提出數(shù)值分析圓環(huán)變形和臨界載荷的重心插值配點(diǎn)法2020手机黄色网址。

In theory of approximations, the classic methods of polynomial approximation for rational expression are various interpolations and operator approximations, such as Lagrange interpolation, Hermite interpolation and Bernstein polynomial approximation.

在逼近論中，用多項(xiàng)式逼近有理式的經(jīng)典的方法是各種插值與算子逼近方法欧美性爱久精品，如Lagrange插值人人干,人人操。、Hermite插值和Bernstein多項(xiàng)式逼近等。

The basic idea is as follows: first, a kind of plane α-B-spline interpolation curve with a shape control parameter a is constructed; then, by converting the first derivatives of the curve into Bernstein polynomial, the positive conditions of Bernstein polynomial can be used to get the necessary and sufficie nt conditions for the monotonicity of α-B-spline interpolation curves, i.e., the range of the parameter a. Therefore, monotone-preserving interpolating curves can be obtained succinctly.

其基本思想是：首先構(gòu)造帶有形狀可調(diào)參數(shù)的一類(lèi)平面(-B樣條插值曲線一级A一级a毛片爱片免费看免免，再把其一階導(dǎo)矢的兩個(gè)分量分別轉(zhuǎn)化為Bernstein多項(xiàng)式91部精品国产费观，從而利用Bernstein多項(xiàng)式的正性條件，得到此曲線為單調(diào)的充要條件一级又黄又粗毛片视频，即形狀參數(shù)的取值范圍aaaaaa性欧洲，簡(jiǎn)單、快捷地實(shí)現(xiàn)此參數(shù)樣條曲線的保單調(diào)插值久久伊人精品免费视频。

For the given endpoint interpolation conditions, a new approximation method of multidegree reduction is presented. Using Chebyshev polynomial approximation theory, the nearly best uniform approximation under the interpolation conditions of endpoints can be obtained.

對(duì)于給定的首末端點(diǎn)的各階插值條件国产天天在线视频，給出了一種新的一次降多階逼近算法，應(yīng)用Chebyshev多項(xiàng)式逼近理論達(dá)到了滿足端點(diǎn)插值條件下的近似最佳一致逼近视频黄片。永久。。

In this paper we study the method of interpolation by radial basis functions in H~k(k ≥ 1) and give some error estimates. By means of such interpolation with a special kind of radial basis function, we construct a basis in H~k(k ≥ 1). Combined with the Galerkin method, this theory can be applied to solve boundary value problems for elliptic partial differential equations (such as the third boundary value problem for Poisson equation and the corresponding problem for the biharmonic equation), and some numerical experiments are also given.

本文從求解偏微分方程的角度出發(fā)人人插女人，在被逼近函數(shù)u屬于一般的Sobolev空間H~k(k≥1)的情形，引入了一種徑向基函數(shù)插值方法免费无码成年片在线观看，并建立了相應(yīng)的誤差估計(jì)91视频网免费观看；再利用這種插值性質(zhì)，從一類(lèi)特殊徑向基函數(shù)出發(fā)構(gòu)造Sobolev空間的一組基在线国产毛片，針對(duì)Poisson方程第三類(lèi)邊值問(wèn)題和重調(diào)和方程類(lèi)似邊值問(wèn)題看偷拍视频的网站，為用無(wú)網(wǎng)格算法求解偏微分方程邊值問(wèn)題建立了相應(yīng)的理論，并通過(guò)算例來(lái)驗(yàn)證了這一算法九九视频免费精品视频。

By remove the outer corner, it can get the best transformation matrix. Finally, the thesis use backward mapping and bilinear interpolation function to execute interpolation calculation in image merge. And then it use overlapped area linear transition method to build a seamless integrated image.

最后通過(guò)使用后向映射和雙線性插值法在圖像合并過(guò)程中進(jìn)行插值運(yùn)算官方网站黄色网站黄色网站一级片，并使用重疊區(qū)域線性過(guò)渡算法來(lái)消除圖像拼接縫，實(shí)現(xiàn)圖像之間的無(wú)縫拼接国产男女猛烈无遮挡网站。