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样条函数

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The B-spline finite element Methodis becoming increasinglyimportant due to the derivative continuity and local support propertiesof its basis functions.

B样条有限元法以其基函数具有导数连续性和局部支集性而越来越受到人们的重视。

Based on the analysis and summary of basic ideas and methods,this thesis proposes two new estimation of error of higher order approximation.

方法二是在等距分布的条件下,基于三次样条插值函数的三弯距算法,通过利用节点处弯距的加权和近似计算区间中点处的二阶导数。

And the polar angle and the polar radius was represented into AutoCAD polar coordinate, the involute was drawn through the spline linear tool. And then, a section of the involute was intercepted with the diameters of the point circle and the root circle, used it as the tooth face of the spline. The involute tooth thickness was drawn using the diameter of the divided circle and the tooth-form was drawn through rotating, mirroring image and cutting.

根据DIN 3960渐开线花键的坐标值,用EXCEL函数功能计算出不同压力角下渐开线的极角和极半径,表示成AutoCAD极坐标并通过样条线工具绘制出渐开线,再用齿顶圆和齿根圆直径截取一段渐开线作为为花键齿面,并用分度圆直径绘制出渐开线齿剖面,经镜像和裁剪便可绘制出渐开线齿形。

In this method, the parameter value at the maximum of each rational B-spline basis function is defined as the parameter value of associated data point.

在这种方法中,把每个有理B样条基函数的最大值处的参数值定义为相伴数据点处的参数值。

In the fitting of the actual operation, using Matlab graphics software and the use of least squares spline interpolation function is more convenient and have good results in the means.

在拟合曲线的实际操作中,借助Matlab绘图软件使用最小二乘法和三次样条插值函数是较为方便且有良好效果的手段。

The algorithm provided in this text is general and it can be expaned to other field, such as spline approximation, function approximation and the curve fitting.

本文提供的逼近算法具有一般性,可将其推广到其它领域,如样条逼近、函数逼近、曲线拟合。

The first part gives a constraint on partition, in such a way that a cubic spline of interpolation under such a constraint of partition uniformly converges to a continuous function.

第一部分给出分划的一种限制,使在此限制下三次插值样条一致收敛于连续函数。

As one of the leading branches of the modern statistics, the riouparametric regression analysis is widely applied to explore the relationship between the the response variable y and the covariable A'.

对于非参数回归人们提出了许多估计方法,如核估计,局部多项式估计,光滑样条估计,级数估计(傅里叶级数估计,小波级数估计)等。这些方法本质上讲都是局部估计或局部光滑,当回归变量X为一维变量时,非参数回归函数用这些方法一般都能得到很好的估计。

In this paper, we define quadratic spline as wavelet, do the two dimentional dyadic wavelet transform on near-infrared galactophore image, and get local modulus maxima from wavelet transforms results----rnodulus and angles, so we can find the blood vessel edge image in each scales, at last, we compute a good edge image which synthesize the characters in each scale.

本文中用二次样条小波作为小波基函数,对乳腺近红外图像进行二维二进小波变换,计算小波变换结果的局部模极大值点,得到各个尺度下的乳腺近红外图像血管的边缘,最后得到综合了各个尺度特征的较好的血管图像的边缘。

According to the meteyard of edge detection and consulting the design-aim of optimal edge-filter, this paper discussed the general rules of selecting the mother function of wavelet used in edge detection, then constructed a quadric B-spline wavelet and presented a method of adaptive thresholds edge detection for image based on wavelet transform.

根据边缘检测的评价标准,参照最佳边缘滤波器的设计要求,确定选择用于边缘检测的小波母函数的一般准则,并在此基础上构造出二次B样条小波,提出了基于小波变换的自适应阈值图像边缘检测的新方法。

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随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

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关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。