残差

Then , do a simple regression of y on to obtain.

换句话说， 是由回归得到的残差。

Properties of OLS: minimize the sum of squared residuals.

OLS性质： 最小化残差平方和。

There exist positive serial correlation among the residuals.

残差之间存在正的序列相关。

The reduction appears some regularity in spite of it´s variation in various situation.

残差平方和的减少在各种场合有所不同，但呈现出一定的规律性。

There exists asymmetry characteristic of residual distribution in the regression model of city air quality forecast.

城市空气质量回归预报模型的残差分布存在着不对称现象，它是由高杠杆点引起。