TY - Journal of Computer Applications A1 - CHEN Jun, HE Qing T1 - Improved butterfly optimization algorithm based on cosine similarity Y1 - 2021-09-10 JF - Journal of Computer Applications JO - Journal of Computer Applications SP - 2668 EP - 2677 VL - 41 IS - 9 UR - http://www.joca.cn N1 - 10.11772/j.issn.1001-9081.2020111776 ER -