variance ration 中文意思是什麼

variance ration 解釋
方差比
  • variance : n. 1. 變化，變動，變更；變度，變量；【統計】（平）方（偏）差。2. （意見等的）相異；不和，沖突，爭論。3. 【法律】訴狀和供詞的不符。
  • ration : n 1 （供應物等的）限額，定額，定量；飼料配（給）量。2 〈常 pl 〉（一般人或動物尤指兵員的）每日口...
  1. Secondly, this article uses variance analysis and other research means of statistics to study and definitize the best mix proportion ration of pumice concrete, and studies mechanics and durability of the concrete using the best mix proportion

    通過正交分析的實驗方法，研究並確定了浮石混凝土的優化配合比，並對根據該配合比設計而成的浮石混凝土的力學性能和耐久性能進行了分析研究。
  2. Secondly, this paper mainly put forward different grey level threshold value segmentations of plane target after brief analyse the smooth and sharp image of image strengthen technology, segmentation for the overall situation, adopt the maximum variance method, the maximum entropy combine with adaptive threshold selection method, the maximum variance ration between two classes and in two classes ; segmentation for the part situation, has adopted the adaptive threshold value method ; to background more complicated segmentation, have adopted the two - dimentional maximum entropy method

    其次，在簡要的分析了圖像平滑和銳化的圖像增強技術后，重點研究了飛機目標的灰度分割，提出不同的灰度閾值分割方法進行圖像分割，對于全局分割，採用了最大類間分割法、最大熵與一致性準則相結合法、最大類間類內方差比法;對于局部分割，採用了自適應閾值法;對于背景較復雜的分割，採用了二維最大熵法。
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