三角形窗的英文

• triangular window

• "三角形"英文翻译    triangle; triangular shape
• "窗"英文翻译    window
• "三角形" 英文翻译 :    [数学] delta; triangle; square 不等边三角形 scalene triangle; 等边三角形 equilateral triangle; 等腰三角形 isosceles triangle; 直角三角形 right-angled triangle
• "三角形；三角形面" 英文翻译 :    triangle
• "三角形三角形接法" 英文翻译 :    delta delta connection
• "三角 三角形接线" 英文翻译 :    delta delta connection
• "三角-三角形接法" 英文翻译 :    delta-delta connection
• "三角的,三角形的" 英文翻译 :    triquetral
• "（三角形）相似的" 英文翻译 :    similar
• "埃及三角形" 英文翻译 :    pythagorean theorem
• "闭合三角形" 英文翻译 :    closed triangle
• "编辑三角形" 英文翻译 :    edit triangulation
• "彩色三角形" 英文翻译 :    color triangle
• "测地三角形" 英文翻译 :    geodesic triangle
• "成分三角形" 英文翻译 :    composition triangle
• "成三角形" 英文翻译 :    triangularity; triangulate; triangulation
• "成三角形地" 英文翻译 :    triangularly
• "船位三角形" 英文翻译 :    triangle of position
• "垂足三角形" 英文翻译 :    pedal triangle
• "单位三角形" 英文翻译 :    unit triangle
• "倒三角形" 英文翻译 :    del grad; del operator; half-diamond indention
• "倒三角形的" 英文翻译 :    obtriangular
• "导航三角形" 英文翻译 :    navigation triangle; navigational triangle
• "导纳三角形" 英文翻译 :    admit triangle; admittance triangle
• "等边三角形" 英文翻译 :    equiangular triangle; gleichseitiges dreieck equilateral triangle; isosceles triangle; regular triangle; triangle

• In the part of window , a best window must own the following character : ( 1 ) the smallest band - width in the place of 3db , as well as main - lobe width ( 2 ) the biggest side - lobe peak - value of must be as possible as small
  就窗函数而言，引入实验的七种窗函数中，有限带宽、三角形窗以及余弦窗是卷积窗函数比较理想的选择。
• 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图像重建时，选择有限带宽窗有较好的空间分辨率，三角形窗有较好的密度分辨率，选择余弦窗则使得空间分辨率与密度分辨率的折衷；从窗函数的频谱角度来讲，可以用于图像重建的一个良好的卷积窗函数应该具备以下条件： ( ? )小的3db带宽b ，即最小的主瓣宽度； ( ? )最小的旁瓣最大峰值a ； ( ? )最大的旁瓣峰值衰减速度d ；就内插函数而言，临近点内插与线性内插重建图像噪声大，但有较好的边缘与细节； 4 4三次内插、三次b -样条与四次拉格朗日多项式内插图像平滑，局部特性较好。