density reconstruction 中文意思是什麼

density reconstruction 解釋
密度重建
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  • reconstruction : n. 1. 重建；改造；復興。2. 〈美國〉南北戰爭后南部各州的重建。
  1. The reconstruction speed of fbp is fast. the image reconstructed by fbp is of high spatial resolution, but with heavy artifacts, while the image reconstructed by art is of high - density resolution and is of sligh artifacts

    變換方法以卷積反投影（ fbp ）方法最為常用，該演算法重建速度快，成像質量較好，但是其要求完全的、等間距的采樣數據，通常重建圖像偽影較重。
  2. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  3. ( 3 ) in multi - particle simulation, if the particles are not too dense, the reconstruction images of particles are clear. when the particles density reaches some degree, the definition of the reconstruction images will decrease along with the particles density growing

    （ 3 ）在對多個粒子的模擬記錄和再現過程中，通過改變粒子的密度，發現粒子密度較小時，記錄和再現效果都很好，而當粒子密度增大一定程度時，粒子再現像的清晰度會下降。
  4. For the soft rock, the shrink of material and reconstruction of particle is dominant, and density of rock is large

    至於孔隙率較高且連通性較高的軟砂巖則以顆粒重組和收縮佔主導地位，巖石密度增大。
  5. The fft inversion method is fit for reconstruction of density distribution with sharp peaks and complex shape. the results of numerical simulations of this method show high inversion accuracy and fast calculation speed

    快速傅立葉變換法適合於重建具有陡峭波峰和復雜形狀的等離子體密度分佈，數值模擬的結果表明該方法具有計算精度高和速度快的特點。
  6. The emphasis on the applications of constrained regularization method is the identification of weight density distribution of hanging cable and rotating shaft, inversion of particle size distribution from light scattering data, the reconstruction of the atomatic radial distribution in exafs spec - troscopy

    其中，我們的重點是約束正則化方法在懸索與旋轉桿的重力密度識別、顆粒粒徑分佈的光散射反演、 exafs光譜學中原子徑向分佈的重構等問題中的應用，並同時進行了數值試驗。
分享友人
分享到 Line

分享到臉書