1. Sheu, H., Lu, Y., Wei, Y.: Causalities between sentiment indicators and stock market returns under different market scenario. Int. J. Bus. Finan. Res. 4, 159–172 (2010)
2. Turney, P., Littman, M.: Measuring praise and criticism: inference of semantic orientation from association. ACM Trans. Inf. Syst. 21(4), 315–346 (2003)
3. Zhang, Y., Huang, J.: Sentiment analysis of Douban film review text based on PMI. Mod. Comput. 12, 37–40 (2019)
4. Lin, J., Gu, Y., Zhou, Y., Yang, A., Chen, J.: Research on the construction of emoticon based sentiment dictionary. Comput. Technol. Dev. 29(6), 181–185 (2019)
5. Zhu, X., Song, J., Meng, J.: Analysis of network public opinion information based on dynamic theme emotion evolution model. Inf. Sci. 37(7), 72–78 (2019)