It's a hotspot in emotional research that how to extract an effective feature. Combining the advantages of the sample entropy algorithm with high accuracy and the permutation entropy algorithm with high accuracy in the nonlinear method of EEG,this paper proposed equal symbolic entropy( ESE) and tried to verify the effectiveness of this new feature in emotional EEG analysis. In this algorithm,the signals were reconstructed with equal probability before the reconstruction of phase space,and the proportion of ...