余弦

Fast Fourier transform and discrete cosine transform a simple, and it is only a small problem, not repaired, huh.

快速傅立叶变换和离散余弦变换的简单实现，有一些小问题，就不修复了，呵呵。

A discrete cosine transform algorithm was used to process the joint power spectrum in order to enhance the cross correlator term and eliminate the auto correlator term in the joint power spectrum and improve the discriminability of the system.

利用离散余弦变换算法对联合变换功率谱进行数字处理，增强傅里叶面的互相关项，消除自相关项，提高了系统的识别能力。采用一种新的双参数判别方法对相关信号进行判别，提高了判别的准确度。

A feature extraction and retrieval algorithm based on childblock partition and area division using discrete cosine transformation and singular value decomposition is proposed.

提出一种在子块分割和区域划分的基础上，利用离散余弦变换和奇异值分解对图像进行特征提取的检索算法。

All phase Walsh transform ; biorthogonal transform ; dual biorthogonal base vectors ; JPEG image compression algorithm ; discrete cosine transform; peak signal to noise ratio

全相位沃尔什变换；双正交变换；对偶双正交基向量； JPEG压缩编码算法；离散余弦变换；峰值信噪比

In the embedment of the information, the hiding algorithm of Discrete Cosine Transform based on modular arithmetic has been chosen in the frequency law.

在秘密信息的嵌入入程中，选择了频域法中的基于模运算的离散余弦变换隐藏算法，这样就增强了隐秘载体在传输入程中的安全性。

By the procedure, we first use the cosine values of the angle between view vector and normal vector on each vertex as the texture coordinates, through calculation of the dot product of the two vectors. The derivative of radial curvature on the model surface is used as the second pass texture mapping coordinates, by a calculation using Euler formula.

该方法首先通过模型顶点的视线向量和法线向量的点乘积计算其夹角的余弦值，作为第一步的纹理坐标进行映射；再通过欧拉公式计算径向曲率及其方向导数值，作为第二步映射的纹理坐标。

The solution to the dual integral equations with exponential function can be discussed,too.

最后给出了含余弦函数对偶积分方程的数值算例。

Circadian parameters were analysed by the cosine method, and by the F test to judge the statistics significance.

用余弦分析获取节律参数，并经振幅检验，分析是否存在昼夜节律。

First, the replacement of the traditional fast Fourier transformation with discrete cosine transformation in additive white Gaussian noise channel to set up OFDM system is analyzed and simulated in this article.

首先，在加性白高斯噪声信道中，本文分析和仿真了用离散余弦变换替代传统的快速傅立叶变换宋实现OFDM系统。

The propagation of cosh Gaussian beams through a first order paraxial optical system with rectanglar hard aperture is studied. By using the expansion of the rectangle function into a finite sum of complex Gaussian functions a closed form propagation equation of cosh Gaussian beams is derived.

对双曲余弦高斯光束通过有硬边光阑的一阶ABCD光学系统的传输进行了研究，采用将矩形域函数表示为复高斯函数叠加的技巧，推导出了解析的传输公式，在特殊情况下，该公式简化为在无光阑情况下的传输公式。

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。