查询词典 laplace transform

Discrete Fourier transform and its fast algorithms as a basic transform in digital signal processing also have been widely used.

离散傅立叶变换及其快速算法FFT作为数字信号处理中的基本变换，有着广泛的应用。

In this paper we first present some essential properties for continue fractional Fourier transform and discrete fractional Fourier transform.

首先讨论了连续分数傅立叶变换和离散分数傅立叶变换并提出了一些重要性质。

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 fast computer implementation of the Discrete Fourier Transform is known as a Fast Fourier Transform.

众所周知，在遥感图像中，在不同频谱的多谱数据之间可能存在显著的相关性。

Based on pretty performance of fractional Fourier transform, discrete fractional cosine transform adaptive filtering algorithm is proposed.

针对分数阶傅里叶变换的分数阶次不确定问题，提出一种寻找最优分数阶次的方法：建立分数阶次和失调的关系曲线。

Ordinary image signals in discrete Fourier transform and inverse transform.

详细说明：普通的离散图像信号的傅里叶变换和逆变换。

This procedure is based on discrete cosine transform DCT-formula implemented procedures to help beginners understand the discrete cosine transform process.

详细说明：这个程序是根据离散余弦变换的公式实现的DCT变换程序，能够帮助初学者理解离散余弦变换的过程。

PSNR.-images of two-dimensional discrete wavelet transform, transform Series is greater than or equal to 3, and reconstructi...

对图像进行二维离散小波变换，变换级数大于等于3级，并进行重构，最后计算重构图像的峰值信噪比

For the diffractive optical element realizing beam shaping in the fractional Fourier transform domain,the transform matrix calculated by the discrete sampling points was compared with that calculated by the Fresnel integral,and the discretization error of the intensity distribution on the output plane was qualitatively obtained.

针对分数傅里叶变换衍射光学光束整形器件，比较了按离散点与按菲涅耳积分计算得到的变换矩阵间的差距，从中分析得出按离散点计算的变换矩阵引入的离散化误差与分数傅里叶变换系统参数的关系。

New concepts of the all phase Walsh biorthogonal transform and the dual biorthogonal base vectors were proposed.Based on this transform,a new image compression algorithm was introduced.

本文提出了全相位沃尔什双正交变换和对偶双正交基向量的新概念，并提出了一种基于这种变换的、新的图像压缩算法。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。