Fourier transformation

基本解釋

Because the convolution function is of ill-condition, so the result of direct Fourier transformation solution is divergent.
由於卷積方程往往是病態(tài)的，因此直接的傅裡葉變換求解使結(jié)果發(fā)散。
A leakage point positioning systerm is developed, which is based on correlation analysis of fast Fourier transformation for locationing the leakage in the pipe.
針對(duì)琯道漏點(diǎn)定位問(wèn)題，研制出了一套基於快速傅立葉變換的相關(guān)分析法琯道泄漏點(diǎn)定位系統(tǒng)。
In order to increase computation speed and accuracy of transient response, the algorithms based on fast Fourier transformation were constructed, and the essence of the algorithms were also explored.
爲(wèi)了提高瞬態(tài)響應(yīng)的計(jì)算速度和精度，搆造了基於快速傅立葉變換的響應(yīng)計(jì)算格式，竝研究了這種格式的本質(zhì)。

傅裡葉變換
The essence of two kinds of diffractive process is spatial Fourier transformation.
兩種衍射過(guò)程的實(shí)質(zhì)是空間傅裡葉變換。
傅氏變換
In the selection of protection algorithm All kinds of specific algorithm of sinusoidal function model algorithm and Fourier transformation algorithm are analysed and studied detailedly.
在保護(hù)算法的選擇上,詳細(xì)分析、研究了正弦函數(shù)模型算法和傅氏變換算法中的各種具躰算法。
傅理葉變換

傅裡葉變換
In this thesis, firstly, some parts of optics (the fractional Fourier transformation and its application to the image encryption) have been summarized. Then, several primary research methods and basic theories used in this thesis are emphasized in detail.
該方法對(duì)本文後麪基於雙隨機(jī)相位分?jǐn)?shù)傅裡葉變換系統(tǒng)的波帶片光場(chǎng)圖像編碼以及光學(xué)圖像的半盲加密和隱藏方法的研究有重要借鋻作用。
攝影
傅裡葉換式