“…However, their main differences are in the ways of generating ∆x t i and ∆v t i from the population of the existing solutions. Most recently, new variants and applications are appearing regularly, including local ant system for allocating robot swarms [Khaluf et al(2019)Khaluf, Vanhee, and Simoens], hybrid ant and firefly algorithms [Goel and Maini(2018)], usability feature selection by MBBAT [Gupta and Ahlawat(2017)], vehicle routing (Osaba et al, 2017;Osaba et al, 2019) and others (Alyasseri et al, 2018;Abdel-Basset and Shawky, 2019).…”