Abstract: An unmanned aerial vehicle (UAV) return method includes controlling a UAV to ascend vertically to a first preset position, controlling the UAV to fly from the first preset position to a second preset position along a horizontal direction, controlling the UAV to fly from the second preset position to a third preset position along a flight tilt angle direction indicated by a flight tilt angle, and controlling the UAV to land vertically from the third preset position to a preset return position. The second preset position is determined according to position information of the first preset position, position information of the third preset position, and a flight tilt angle. The third preset position is above the preset return position.

Abstract: The present disclosure provides methods and devices for controlling unmanned aerial vehicles, spraying systems, unmanned aerial vehicles, and storage media. The method includes: obtaining location information of an unmanned aerial vehicle having a plurality of nozzles disposed thereon and attitude information of the unmanned aerial vehicle; for each nozzle: determining a spraying area corresponding to the nozzle in a target area based on the location information and the attitude information; determining whether there are one or more target object in the spraying area corresponding to the nozzle; controlling the nozzle to be ON in response to determining that there are one or more target objects in the spraying area; and controlling the nozzle to be OFF in response to determining that there is no target object in the spaying area.

Abstract: Examples of the present disclosure provide a dual-homing protection method and device. In the dual-homing protection method, a forwarding item synchronizing channel and a data transfer channel are established between two Provider Edge (PE) devices in a dual-homing node, a Pseudo Wire (PW) and a Label Switched Path (LSP) protection group bearing the PW are established between a network side peer PE device and the two PE devices in the dual-homing node, which are taken as a logical device, so as to implement LSP protection within a network. The present disclosure may enable the protection within a network to be independent of access link protection. Subsequently, the management is simple.

Abstract: Examples of the present disclosure provide a dual-homing protection method and device. In the dual-homing protection method, a forwarding item synchronizing channel and a data transfer channel are established between two Provider Edge (PE) devices in a dual-homing node, a Pseudo Wire (PW) and a Label Switched Path (LSP) protection group bearing the PW are established between a network side peer PE device and the two PE devices in the dual-homing node, which are taken as a logical device, so as to implement LSP protection within a network. The present disclosure may enable the protection within a network to be independent of access link protection. Subsequently, the management is simple.

Abstract: The present invention discloses a method for implementing an intersecting ring network with arbitrary topology, node and an intersecting ring network. The method includes: intersecting multiple Ethernet rings to form the intersecting ring network with arbitrary topology, each Ethernet ring in the intersecting ring network comprising a master node and multiple transmission nodes; the master node of each Ethernet ring opening its primary port and blocking its secondary port during initial normal operation; and the master node of each Ethernet ring in the intersecting ring network performing fault detection and fault processing as well as fault recovery detection and fault recovery processing by using one of the two manners containing protocol message interaction and detection on links directly connected to the master node.

Abstract: The present invention discloses a method for implementing an intersecting ring network with arbitrary topology, node and an intersecting ring network. The method includes: intersecting multiple Ethernet rings to form the intersecting ring network with arbitrary topology, each Ethernet ring in the intersecting ring network comprising a master node and multiple transmission nodes; the master node of each Ethernet ring opening its primary port and blocking its secondary port during initial normal operation; and the master node of each Ethernet ring in the intersecting ring network performing fault detection and fault processing as well as fault recovery detection and fault recovery processing by using one of the two manners containing protocol message interaction and detection on links directly connected to the master node.