normalized scale variance 归一化尺度方差
Because of large scale variance of parameters and nonlinearity of the object, there are many difficulties in tuning of the controller.
由于对象存在着非线性特性及参数变化范围大等特点，给控制器参数的工程整定带来很大困难。
General spatial analytical method include geostatistics, spatial autocorrelation, fractal dimension, trend surface analysis, scale variance analysis.
常用的空间分析方法有地统计学、空间自相关分析、分维数分析、趋势面分析、尺度方差分析等。
Histogram character is not affected by object figure's variance and scale, and it has good stability.
直方图特征不受目标的外形和比例变化的影响，具有较好的稳定性。
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