To improve the regional coverage rate and network lifetime of heterogeneous wireless sensor networks. a sensor node scheduling algorithm for heterogeneous wireless sensor networks is proposed. In sensor node scheduling algorithm. heterogeneous perception radius of sensor node is considered. https://www.jmannino.com/great-pick-Sophie-Allport-Zebra-Made-to-Measure-Blackout-Roller-Blind-Soft-Grey-Blue-top-super/