Abstract: The present application relates to a technical field of determining an irreversible demagnetization of a grain boundary diffusion NdFeB magnet, and more particularly, to a method for identifying an irreversible demagnetization of a grain boundary diffusion NdFeB magnet by magnetic field distribution. After applying a reverse magnetic field to a saturatedly magnetized grain boundary diffusion NdFeB magnet, if a number of magnetic poles on a non-diffusion face of the grain boundary diffusion NdFeB magnet is increased, it is determined that there is an irreversible demagnetization in the grain boundary diffusion NdFeB magnet.

Abstract: A method of tracking a movement of a target by an unmanned aerial vehicle (UAV), the method includes receiving, from a mobile terminal collocating with the target, absolute location coordinate data of the target, acquiring, by a camera of the UAV, image data of the target, determining, based on the absolute location coordinate data and the image data of the target, 3D location coordinate data of the target with respect to the UAV, and controlling, based on the 3D location coordinate data of the target with respect to the UAV, at least one of a direction or a speed of the movement of the UAV, to maintain a constant relative 3D position of the UAV with respect to the target.

Abstract: A computer-implemented method for tracking multiple targets includes identifying a primary target from a plurality of targets based on a plurality of images obtained from an imaging device carried by an aerial vehicle via a carrier, determining a target group including one or more targets from the plurality of targets, where the primary target is always in the target group. Determining the target group includes determining one or more remaining targets in the target group based on a spatial relationship or a relative distance between the primary target and each target of the plurality of targets other than the primary target. The method further includes controlling at least one of the aerial vehicle or the carrier to track the target group as a whole.

Abstract: A computer-implemented method for tracking multiple targets includes identifying a plurality of targets based on a plurality of images obtained from an imaging device carried by an unmanned aerial vehicle (UAV) via a carrier, determining a target group comprising one or more targets from the plurality of targets, and controlling at least one of the UAV or the carrier to track the target group.

Abstract: A control method and device of a movable platform, a movable platform, and a storage medium are provided. The control method may include acquiring a control amount for controlling the movable platform; converting the control amount into control instruction of the movable platform based upon a position of the movable platform and a position of a target object photographed by the movable platform; and controlling the movable platform to move relative to the target object according to the control instruction.

Abstract: Disclosed herein are light detection and ranging (LIDAR) systems and methods for manufacturing the same. The LIDAR systems may include microelectronics packages that may include a chassis, an insert, a photonic integrated circuit (PIC), and a lid. The chassis may define an opening. The insert is sized to be received in the opening. The insert is made of a thermally conductive material. The PIC is attached to the insert. The lid is connected to the chassis and defines a cavity that encases the PIC. Both the insert and the lid form thermally conductive pathways away from the PIC.

Abstract: A method of tracking a movement of a target by an unmanned aerial vehicle (UAV), the method includes receiving, from a mobile terminal collocating with the target, absolute location coordinate data of the target, acquiring, by a camera of the UAV, image data of the target, determining, based on the absolute location coordinate data and the image data of the target, 3D location coordinate data of the target with respect to the UAV, and controlling, based on the 3D location coordinate data of the target with respect to the UAV, at least one of a direction or a speed of the movement of the UAV, to maintain a constant relative 3D position of the UAV with respect to the target.

Abstract: A method of tracking a movement of a target by an unmanned aerial vehicle (UAV) includes determining a distance between the target and the UAV, acquiring image data of the target by a camera of the UAV, determining two-dimensional pixel coordinate data associated with a plurality of features of the target from the image data, determining a physical dimension based on the two-dimensional pixel coordinate data and the distance, and determining three-dimensional location coordinate data of the target with respect to the UAV based on the physical dimension and at least one of the two-dimensional pixel coordinate data or the distance.

Abstract: A control method for a photographing device mounted on a mobile platform, including: obtaining photographing information of the photographing device and monitoring information of a target object, that the target object is a photographing object of the photographing device; and in response to detecting a trigger event of identifying the target object, controlling a zoom operation of the photographing device according to the photographing information and the monitoring information, a size of the target object in an image acquired by the photographing device being controlled within a preset range according to the zoom operation.

Abstract: A method for taking group photo includes entering a group photo mode based on a trigger instruction, identifying a plurality of targets in a current imaging frame in the group photo mode, and triggering a camera carried by an unmanned aerial vehicle (UAV) to shoot in response to determining a plurality of condition satisfying targets among the plurality of targets. The plurality of condition satisfying targets are ones of the plurality of targets that meet an imaging trigger condition.

Abstract: A flight control method includes determining a distance of a target relative to an aircraft based on a depth map acquired by an imaging device carried by the aircraft, determining an orientation of the target relative to the aircraft, and controlling flight of the aircraft based on the distance and the orientation.

Abstract: A computer-implemented method for tracking multiple targets includes identifying a plurality of targets based on a plurality of images obtained from an imaging device carried by an unmanned aerial vehicle (UAV) via a carrier, determining a target group comprising one or more targets from the plurality of targets, and controlling at least one of the UAV or the carrier to track the target group.

Abstract: A method of tracking a movement of a target by an unmanned aerial vehicle (UAV) includes determining a distance between the target and the UAV, acquiring image data of the target by a camera of the UAV, determining two-dimensional pixel coordinate data associated with a plurality of features of the target from the image data, determining a physical dimension based on the two-dimensional pixel coordinate data and the distance, and determining three-dimensional location coordinate data of the target with respect to the UAV based on the physical dimension and at least one of the two-dimensional pixel coordinate data or the distance.

Abstract: An information cross-reference inputting method based on a mobile terminal and the mobile terminal are disclosed. The method comprises the following steps of defining an information region for cross-reference input as a region to be topped, receiving an operation instruction from a user by the mobile terminal to select the region to be topped, and saving the selected region to be topped; topping the region to be topped in a current display interface, and saving data of a region overlaid by the topped region; and receiving an operation instruction from the user by the mobile terminal to drag the topped region so that displaying of the data of the originally overlaid region is recovered. Therefore, the method is very convenient for the user to achieve the information cross-reference inputting without having to remember the related content or frequently switch between two windows.