arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1703.08065stat.ML
收藏

极大相关熵估计对大离群值的稳健性

Robustness of Maximum Correntropy Estimation Against Large Outliers

Badong Chen, Lei Xing, Haiquan Zhao, Bin Xu, Jose C. Principe

摘要:

最大相关熵准则(MCC)最近已被成功地应用于鲁棒回归、分类和自适应滤波中,其中相关熵最大化而不是众所周知的均方误差(MSE)最小化,以提高对离群值(或脉冲噪声)的鲁棒性。在MCC下,人们一直致力于开发各种鲁棒自适应算法,但迄今为止,对于离群值对最优解的影响还知之甚少。在这项工作中,我们研究了这个问题的背景下,参数估计的一个简单的线性误差的变量(EIV)模型,其中所有的变量是标量。在一定的条件下,我们推导出上界的绝对值的估计误差,并表明MCC下的最优解可以非常接近的真实值的未知参数,即使离群值(其值可以是任意大)的输入和输出变量。最后通过实例验证了理论的正确性.

英文摘要:

The maximum correntropy criterion (MCC) has recently been successfully applied in robust regression, classification and adaptive filtering, where the correntropy is maximized instead of minimizing the well-known mean square error (MSE) to improve the robustness with respect to outliers (or impulsive noises). Considerable efforts have been devoted to develop various robust adaptive algorithms under MCC, but so far little insight has been gained as to how the optimal solution will be affected by outliers. In this work, we study this problem in the context of parameter estimation for a simple linear errors-in-variables (EIV) model where all variables are scalar. Under certain conditions, we derive an upper bound on the absolute value of the estimation error and show that the optimal solution under MCC can be very close to the true value of the unknown parameter even with outliers (whose values can be arbitrarily large) in both input and output variables. Illustrative examples are presented to verify and clarify the theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑