评判标准是预测打分和真实值之间的均方误差(RMSE)。
The evaluation criterion is the root mean squared error (RMSE) between predicted ratings and true ones.
利用二次移动平均模型，引入均方拟合误差最小的原理确定出时段数n，对国民经济总收入、人口数量等项目进行了预测。
The total income of national economy and the amount of population are predicted with second-degree moving model and with the principle of least mean square fit error determining designated value n.
设计了基于矩阵外积法的一步预测均方误差阵的改进算法。
The algorithm of matrix inversion with matrix exterior product arithmetic is improved, so that matrix inversion is avoided.
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