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中文摘要：
基于线性回归模型参数向量的先验信息提出一类新的s-K 估计改进s-K 估计，并在均方误差阵意义下，得到了这类估计分别优于最小二乘估计、广义岭估计、Stein估计及s-K估计的充要条件。
英文摘要：
A new class of s-K estimators,called the modified s-K estimators was proposed based on the prior information for the parameter vector in a linear model. The necessary and sufficient conditions that the new estimators are respectively superior to the least squares estimator,ridge estimators,Stein estimators and s-K estimators were obtained.
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