1. Zhang RG, Hu XH, Zong YS (2017) Discretization of continuous attributes based on improved discrete particle swarm optimization. Comput Eng Appl 53(18):110–113
2. Sang Y, Li KQ, Yan DQ (2012) A data discretization algorithm based on improved chi-square statistic. J Dalian Univ Technol 3:330–447
3. Wang L (2013) Algorithm of continuous attribute discretization based on improved particle swarm. CEA 49(21):22–31
4. Saito K (2005) Multiple topic detection by parametric mixture models (PMM)—automatic web page categorization for browsing. NTT Tech Rev 3(3):10–12
5. Yu Z (2019) Big data clustering analysis algorithm for internet of things based on K-means. Int J Distrib Syst Technol 10(1):6–10 (in Chinese)