mean dispersion meaning in English

平均分散
平均色散

Then discusses its properties , such as biased property , relative efficiency of generalized variance and superiority comparisons between generalized ridge estimation and generalized least squares estimation . shows iterative algorithm based on the mean dispersion error
该估计虽然具有偏崎，但其估计精度具有良好的性质，如：有偏性、方差一致最优性、相对于广义最小二乘估计的广义方差效率、 mde ? ?有效性等。