中文摘要：

考虑部分线性回归模型中回归系数的估计问题,提出一类新的差分两参数估计.同时讨论新估计的优良性.

英文摘要：

This paper considers the problem of estimating a vector of regression parameters in partially regression model. A difference-based two-parameter estimator is proposed, and we also discuss the properties of the new estimator.