[Retracted] Drone Assisted Robust Emergency Service Management for Elderly Chronic Disease

Table 1

Frequently used notations.

Notation	Description
	Set of elderly people
	Time cost of emergency service for the i-th elderly chronic disease service
	Set of charging stations
	Charging power of charging station
	Flying speed of drone
	Unit hovering energy consumption
	Unit flying energy consumption
	Battery capacity of drone
	Depot for drone
	Emergency service management network
	Set of service segments
	Time cost of edge
	Tour of drone
	Energy consumption of drone providing service
	Energy consumption of drone passing through the edge
	Residual energy of drone after passing through the edge and completing the i-th elderly chronic disease service
	Charging time for drone at charging station
	Drone subtour from the depot to the i-th elderly chronic disease service
	Elderly people serviced by the drone in
	Charging stations visited by the drone in