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But also to geometric attacks such as cropping and rescaling, etc. Particularly, geometric transform such as translate, affine transform and rotation is always a difficulty for watermarking because these transforms change the position of image pixels.

特别是对于平移、旋转和仿射变换这一类的几何变换，由于造成了图像像素位置改变从而使得水印的提取极为困难，一直都是水印算法的难点。

As the first innovative option, the weights are important to the gray value transform in the image process, and a weighting method of the gray value transform is putout by the author.

成像系统标定是机器视觉测量系统所成图像和实际被测尺寸之间实现高精度转换的关键过程。

Considering this disadvantage of contourlet transform and its application in image fusion, a novel algorithm of image fusion was preposed based on Nonsubsampled Contourlet Transform.

针对轮廓波变换的这一不足，提出了一种基于非抽样轮廓波变换的图像融合算法。

Time-frequency analysis ; fractional Fourier transform ; pseudo Wigner distribution; chirp signal ; short-time Fourier transform

时频分析；分数阶傅里叶变换；伪维格纳分布； chirp信号；短时傅里叶变换

Basic characteristics of cosine transform spectrum were analyzed, where contour lines of 2D cosine transform of point mass present the shape of a quarter of concentric circles and the number of counter become small along with the increasing of wave numbers. The spectrum of vertical rectangularcylinder put up periodic zero counters which mark off quadrate areas, the values of counter in each areas alternately change between the plus and the minus, and with the increasing of wave number, the values of counter present attenuation character alike e exponent.

分析了点质量和直立矩形柱体重力异常余弦变换谱的基本特征：点质量二维余弦变换谱等值线呈1/4同心圆形状，等值线随着波数的增大而变稀；直立矩形柱体谱出现了周期性变化的零等值线，该等值线将非零等值线划分为a×b个矩形区域，而且等值线值在各矩形型区域中正负交替变化，随着波数的增大，不同的矩型域中等值线值呈e指数衰减特征。

Starting from the basic governing equations of axisymmetric Biot's consolidation of saturated transversely isotropic soils, and taking Laplace transform with respect to time t and Hankel transform with respect to r, the first order ordinary differential equations in term of z are obtained.

从横观各向同性地基轴对称Biot固结的基本方程出发，通过关于t的Laplace变换和关于r的Hankel变换，得到关于z的一阶常微分方程组。

Based on this, aim at the disadvantage on Wigner Distribution and Fractional Fourier Transform that can't restrain noise interference effectively when be used to detect Linear Frequency Modulated signals interfered by heavy noises, we proposed a improved WD. Simulation results show that this method can restrain noise interference effectively and improve the ability of LFM signals detection. On the other hand, in multi-component cases, WD suffers from the cross-terms, which may impair some of the auto-terms. In order to separate original multi-component signals into components and reconstruct them separately, we can use the method of optimal filtering in fractional Fourier domain. But this method also has a problem that if signals have aliasing in the fractional Fourier optimal domain as well, the reconstructed signals will be distorted. In this thesis, a novel method of quasi Fourier transform is proposed in order to solve the problem of multi-component signal reconstruction, and have good results.

在此基础上，针对Wigner分布和分数维傅里叶变换在处理高噪声背景下线性调频信号检测的问题时存在不能有效抑制噪声干扰的缺点，提出了改进Wigner分布的办法，该方法能够抑制噪声，提高信号的检测能力；针对Wigner分布在处理多分量非线性调频信号时存在干扰项的缺点，以及分数域最优滤波方法在处理多分量非线性调频信号分离重构问题时存在的局限性，该局限性表现为在对最优分数域上也有信号分量重叠的情况进行处理时重构信号发生畸变，提出了新颖的类傅里叶变换的方法，该方法对在最优分数域上也有信号分量重叠的情况也能处理，得到的重构信号失真很小。

Compared with the existing distance transform algorithm in the process of wood cell image segmentation,the proposed algorithm not only can enhance distance transform speed,but also has a vital significance to improve image segmentation efficiency.

经过在木材细胞图像的分割过程中，同现有的距离变换算法比较证明，改进方法提高了距离变换速度，对提高图像分割的效率具有重要意义。

Shanghai is striving to turn itself into an economy-oriented metropolis. With a view to the city's features, the authors hold that we should transform cultural industry into Shanghai's pillar industry. With such a well-laid historical and real foundation, we are confident that we are capable of dong so. Industrialized operation is the only way for culture development. Therefore the government must transform its functions, practise more strict supervision over cultural industry and perfect the relevant la...

基于建立经济中心城市的目标，并结合文化产业自身的特点，在发展文化产业为上海的支柱产业，上海具备发展文化产业所需要的雄厚的历史和现实基础，有能力也有条件大力发展文化产业；产业化运作是文化产业成长和发展的必经途径，政府要转变职能，加强对文化产业的管理和监督职能，建立健全文化法律法规，使文化产业健康稳定地发展。

A new method of automatic segmentation is developed based on the extreme point properties of wavelet transform. The method consists of two main steps: 1. Using the multi-resolution properties of wavelet transform, we can get the information of shape variation with space coordination.

该方法包括两个主要步骤，一是利用小波变换的多分辨率特性得到测井曲线的形态特性随空间坐标的变化信息；二是利用小波变换过零点的特征在不同尺度上的反映，提取不同尺度下的奇异点作为分层的待参考点，结合实际情况最终确定分层点。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。