点变换

The symplectic preserving property of the numerical methods was guaranteed by the canonical transformation, and the energy in the integration time can be adjusted to be constant by changing the parametric variable.

正则变换保证了数值积分的保辛性质，而通过调整引入的〖HT5"H〗参变量〖HT5"SS〗可保证能量在积分格点上守恒。

Transform from wavenumber domain to space domain can be realized through the saddle point method and phase integral.

波数域到空间域的变换可以通过鞍点法和相位积分来实现。

Firstly basic interpolations are obtained from planar circle interpolation by the point by point comparison.

首先使用逐点比较法作平面圆弧插补获得基本插补量，然后以三维坐标变换将基本插补量变换成为空间椭圆的插补量。

An algorithm based on triangulation is presented. First, 3D range data is projected on square domain in the plane.

首先对三维深度数据在矩形平面域上投影，并对平面域内的采样点按Delaunay优化准则进行三角剖分，然后把网格节点变换到三维曲面上，从而实现了煤堆三维立体图的显示。

The algorithm, which multiplies the corresponding wavelet coefficients of adjacent fine scales, enhances the feature of discontinuity point of signals and inhibits the effect of noise signals.

该算法将相邻两个细尺度层上的小波变换系数对应相乘，从而增强了信号在突变点处的特征并抑制了噪声的影响。

A new method was presented to process a 2-dimensional bistatic point target spectrum ,based on the relative independence between the transforms of range and azimuth.

利用距离向和方位向变换相对独立的特点，提出一种处理双基地二维点目标谱的新方法。

These methods consist of correlation registration method、tie point registration method、maximum spectrum registration method and scaling registration method.

论文第四章系统深入研究了InSAR处理中的图象配准方法，它们是相关配准法、特征点配准法、最大谱配准法和尺度变换配准法，阐述了上述算法的特点和处理过程。

Based on the principle of PEC, surface cracks mainly affect the high frequency components and subsurface crack mainly affect the low frequency components, so the PEC signals can be analyzed in frequency domain, which can eliminate the influence of noises during measurement. A method of frequency spectrum separating point is proposed for flaw classification, which enhances the accuracy in classification of defects. The agreement between theory and experiment shows that the present method is valid and applicable.

通过对脉冲涡流的理论分析发现，表面裂纹主要影响脉冲频谱中的高频成分，而表面下裂纹主要影响脉冲频谱中的低频成分，因此可以将时域中易受噪声影响的脉冲涡流信号变换到频域分析，提出了"频谱分离点"的方法来对裂纹进行分类识别，提高了缺陷分类识别的正确率，理论分析和实验结果相一致，证明了该方法的正确性和有效性。

It first choose a mask with a suitable size in the edge image, the local PCA is performed to obtain the principal direction of the mask. The chosen polar angle in Hough transform is limited in a small range emphasizing particularly on the statistical disciplinarian of all principal directions, so it speed up the search time by reducing the range of .

首先在边缘图像范围中选取合适大小的掩膜，通过局部PCA获得支持集内像素点的主元方向；侧重依据所有掩膜内主元方向信息的统计规律来约束Hough变换的极角选择范围，通过缩小参数选择范围大大缩短搜索时间。

Based on predeterminate knowledge of VLP and wavelet nulti-scale analysis feature, segmentation position is located self-adaptively.3 character feature extraction.

根据车牌的先验知识，利用小波变换自动变焦、多尺度分析的特点，对传统的垂直投影法及多线垂直投影法进行滤波，自适应搜索分割点，高效地进行了车牌字符分割。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。