標準方差英文
standard variance
standarddeviation
- 標準: standard; criterion; benchma ...
例句與用法
- Embedding is selectively done in 8 x 8 blocks whose standard variance is less than the average of 8 - neighbor connective blocks " , and strength factor is determined by local image contents
水印有選擇性地嵌入在那些標準方差小于8 -鄰域方差均值的8 8塊內，嵌入強度因子由圖像局部內容確定。 - In this paper we will discuss two asymptotic normal statistics of normal distribution n ( , ^ 2 ) standard variance and these statistics compare on the principle of relative asymptotic efficency
摘要討論了正態分布標準方差的兩個漸近正態估計量及它們之間的優良性的比較，利用相對漸近效準則作為比較的準則。 - In the paper , the main results are brought forth in five aspects as follows : ( 1 ) . the analysis of statistics the characteristic indicated that the variation coefficient of the soil nitrogen density of 0 ~ 30cm depth is lower , the variation coefficient is only 3 . 6 % , the variation coefficient of the nitrogen density of 0 ~ 100cm depth is much bigger than that the 0 ~ 30cm depth , it is 100 % . based on the second national soil general survey material , the average soil profile depth is 101cm , this is in corresponding with skew normal distribution , its standard deviation is 0 . 0192
通過研究，得到以下認識與結果： ( 1 )統計特征分析表明， 0 30cm厚度土壤氮密度的變異系數較低，為3 . 6 ， 0 100cm厚度的氮密度的變異系數相對于來說就很大，為100 ；全國土壤剖面深度平均為101cm ，符合偏正態分布，標準方差為0 . 0192 ； 0 30cm厚度土壤氮密度服從對數正態分布，而0 100cm厚度土壤氮密度基本服從偏正態分布。 - Its center frequency was the range from low frequency to high frequency , its orientation is 6 and scale is 4 . gary image was directly transformed by these wavelet filters , the feature of extracting gray image target was denoted by the coefficients of gabor wavelet transform and its standard variance , the wavelet feature was input to the improved bp neural networks to classify
濾波器的中心頻率是一個從低到高的范圍，濾波器采用6方向， 4尺度，對灰度圖象直接進行小波變換，用gabor小波變換系數的模的平均值和其標準方差來表示抽取的灰度圖象目標的紋理特征，最后，把獲得的小波特征輸入到改進的bp神經網絡分類器進行分類識別。
