To overcome the problems of coverage blind areas and coverage redundancy when sensor nodes are deployed randomly in heterogeneous wireless sensor networks (HWSNs). An optimal coverage method for HWSNs based on an improved social spider optimization (SSO) algorithm is proposed. which can reduce the energy consumption and improve the network coverage. First. https://ygkhbk9735og.timeblog.net/70681899/a-female-generational-reading-of-the-movie-two-women