误差密度 meaning in Chinese

error density

This paper studies mainly the theories of the semi - parametric regression model : ( 1 ) under proper conditions , using random weighted way to the estimator of the error density f ( x ) of the semi - parametric regression model , this paper proved the strong and weak consistent and the asymptotic unbiased property of the weighted kernel estimation fn1 ( x ) of the f ( x )
本文对半参数回归模型：主要做了以下三个方面的理论研究： ( 1 )将随机加权法应用到半参数回归模型的误差密度f ( x )的估计当中去，在适当的条件下，证明了误差密度的加权核估计( ? ) _ ( n1 ) ( x )的强相合性、弱相合性及渐近无偏性。