SRM等价于正则化（regularization）（mark）。SRM就是在ERM的基础上加上表示模型复杂度的正则化项（regularizer）或罚项（penalty term）： 即需要满足经验风险和模型复杂度同时小。
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Tickhonov regularizer Tikhonov正则化算子
One of the crucial steps is choosing an appropriate regularizer in processing GPS systematic errors based on the semi-parametric model.
基于半参数模型的GPS系统误差处理的关键之一是选择合适的正则化矩阵。
Based on TIKHONOV regularization theorem, a new regularizer, which has explicitly physical meaning, is chosen to mitigate the ill-condition of the normal matrix.
基于TIK - HONOV正则化原理，选择了一种具有物理意义的正则化矩阵，以减弱法矩阵的病态性。
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