School of Electronic and Electrical Engineering;
Shanghai University of Engineering Science;
Shanghai 201620;
China;
Henan Costar Group Ltd;
Nanyang 450061;
Henan;
China;
School of Computer Engineering and Science;
Shanghai University;
Shanghai 200244;
China;
Shanghai Key Laboratory of Integrated Administration Technologies for Information Security;
Shanghai 200240;
China;
topic evolution; sentiment factors; word vector; Latent Dirichlet Allocation(LDA);