fourier number 中文意思是什麼
fourier number
解釋
傅里葉數-
According to fourier analysis theory and the results of coupling theory of uniform fiber grating, the spectral characteristics of sampled fiber grating is studied theoretically and the formula about its overall envelop, peek interval and the number of these peaks are obtained
摘要運用傅立葉分析與均勻光纖光柵耦合模理論的結果，對取樣光纖光柵的光譜特性進行了理論研究，得到取樣光纖光柵反射峰包絡、反射峰間隔和反射峰數量的理論計算公式。 -
[ 5 ] expressed the wavefunction in terms of a two - dimensional fourier series. this form can satisfy the continuity of the function and of its derivative divided by the band - mass. but the number of the terms is so large that it is difficult to calculate the physical magnitudes in the single quantum wire
1996年， s . gangopadhyay等人將波函數用二維傅立葉級數展開，這種取法滿足波函數的連續性條件及粒子流（ 1 / m ~ * ） ' （ x ， y ）的守恆條件，但是當考查單量子線時，需要展開的項數很多，計算量很大。 -
As the targets flying in groups may spread over several range of cells and their doppler frequencies are time *. varying, a scheme of target number detection in groups on a conventional low *. resolution radar is proposed based on a time *. range *. doppler image cube which is constructed by substituting a time *. frequency transform for the fourier transform in the conventional range *. doppler imaging
針對實際編隊目標在距離上的分佈特性和目標多普勒頻率的變化規律，利用聯合時頻變換代替傳統傅立葉變換，建立目標時間-距離-多普勒立體像，提出一種基於立體像的目標架次檢測方法。 -
First the object contour is translated into a 1 - d contour curve. secondly the curve is smoothed to restrain the noise. the number of peaks of the curve is achieved as well as the areas which contained between adjacent peak - valley, then the latter is followed by discrete fourier transformation ( dft )
首先將目標輪廓轉換成一維輪廓曲線，平滑去噪，然後獲得曲線峰數和輪廓曲線在相鄰峰谷間所含面積，並對後者進行dft變換，提取出具有平移、旋轉、尺度不變性的兩類特徵。 -
Because of the complication of ground condition, the ground is regarded as continuous layers and each layer of soil is defined as a uniform and elastic object. by solving the wave equation ( navier equation ) of three - dimensional elastic object, the results of ground under moving loads in wave number ? frequency field are obtained, then through the rapid fourier reverse transform, the results in space - time field are obtained
由於地質條件的復雜性，將地基看成是層狀的，並且每層都是均勻彈性的，通過解三維彈性體的波動方程（ navier方程）得到地基在移動荷載作用下的波數-頻域的解，再通過快速fourier逆變換（ fft ）求得空間-時間域的解。
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