Abstract: Systems and methods for frequency management, including: an online media service configured to: receive a request for a media item, the request including a recipient identifier; identify a set of candidate media items ranked by a set of matching criteria; a frequency management service configured to: perform a query against a lookup service, where the query includes (i) an entity identifier of at least one candidate media item of the set of candidate media items, and (ii) the recipient identifier; receive a response from the lookup service including a quantity of impressions associated with the entity identifier and the recipient identifier; identify a predefined frequency threshold; determine that the frequency threshold is exceeded and exclude the at least one candidate media item from a result set based on the determination; and provide the result set including an identifier of at least one other candidate media item.

Abstract: A system for operating a vehicle includes a first temperature sensor located at a first location and configured to measure a first temperature; a second temperature sensor located at a second location configured to measure a second temperature; and one or more processors. The one or more processors are individually or collectively configured to receive information regarding the first temperature and/or the second temperature; process the information; and impose a restriction affecting operation of the vehicle based on the processed information.

Abstract: Methods and systems for employing a sensor to detect disconnection of a liquid supply tank and a low fill level of the liquid supply tank are disclosed herein. The sensor may have a conductive probe to contact liquid, e.g., to detect a liquid level in a removable liquid supply tank.

Abstract: A method includes establishing a first wireless connection between a movable object and a first remote control device, and establishing a second wireless connection between the movable object and at least one second remote control device. The method also includes selecting, based on a determination that the first wireless connection is normal, a first control signal received from the first remote control device to control the movable object. The method further includes selecting, based on a determination that the first wireless connection is abnormal and that the second wireless connection is normal, a second control signal received from the at least one second remote control device to control the movable object.

Abstract: A method for providing location access management includes receiving a request for access data with respect to one or more regions based on location data associated with a movable object, determining that an access level associated with a restricted region of the one or more regions is restricted, displaying a message based on the access level associated with the restricted region on a user interface of a client device, receiving a request to unlock the restricted region, unlocking the restricted region, updating a data structure corresponding to a region identifier and representing the restricted region, to indicate that the restricted region is unlocked, and sending the updated data structure to update the access data for the movable object. The access data includes one or more data structures representing the one or more regions. The request includes the region identifier associated with the restricted region.

Abstract: A method for providing location access management includes requesting access data from an access manager based on location data associated with a movable object, receiving the access data determining accessibility of one or more regions to the movable object, and sending the access data to the movable object via a connection to the movable object.

Abstract: A system for operating a vehicle includes a first temperature sensor located at a first location and configured to measure a first temperature; a second temperature sensor located at a second location configured to measure a second temperature; and one or more processors. The one or more processors are individually or collectively configured to receive information regarding the first temperature and/or the second temperature; process the information; and impose a restriction affecting operation of the vehicle based on the processed information.

Abstract: A method for operating a vehicle includes, with aid of one or more processors, individually or collectively, receiving a parameter regarding operation of the vehicle, processing the parameter regarding the operation of the vehicle, and varying a restriction affecting operation of the vehicle based on the processing of the parameter.

Abstract: A method includes establishing a first wireless connection between a movable object and a first remote control device, and establishing a second wireless connection between the movable object and at least one second remote control device. The method also includes selecting, based on a determination that the first wireless connection is normal, a first control signal received from the first remote control device to control the movable object. The method further includes selecting, based on a determination that the first wireless connection is abnormal and that the second wireless connection is normal, a second control signal received from the at least one second remote control device to control the movable object.

Abstract: A method includes receiving, by a first receiver communicatively coupled with a first remote control device, a first control signal from the first remote control device. The method also includes receiving, by a second receiver communicatively coupled with a second remote control device, a second control signal from the second remote control device. The method further includes selecting one of the first control signal of the first remote control device and the second control signal of the second remote control device for controlling a movable object.

Abstract: The present disclosure provides a method for controlling a return flight of an unmanned aerial vehicle (UVA). The method includes controlling the UAV to fly to a predetermined cruising altitude, and controlling the UAV to return horizontally at the predetermined cruising altitude based on a first predetermined horizontal speed control value when determining that a remaining power of the UVA is less than or equal to a predetermined return flight power threshold; and controlling the UAV to perform a forced landing and the return flight based on the first predetermined horizontal speed control value and a predetermined descent speed control value when determining that the remaining power of the UAV is less than or equal to a predetermined descent power threshold in the process of the horizontal return at the predetermined cruising altitude.

Abstract: A method for controlling an unmanned aerial vehicle includes receiving update data of a flight restriction database of the unmanned aerial vehicle returned by a server in response to an updating request and carrying current position information of the unmanned aerial vehicle, and, if the update data satisfies a condition controlling, controlling flight of the unmanned aerial vehicle according to the update data.

Abstract: A control method for an unmanned aerial vehicle (UAV) includes obtaining location information of the UAV and location information of a flight restriction area, obtaining a flight mode of the UAV in response to determining that the UAV enters a buffer area of the flight restriction zone according to the location information of the UAV and the location information of the flight restriction zone, in response to the flight mode of the UAV being a non-velocity-control mode, switching the flight mode of the UAV from the non-velocity-control mode to a velocity-control mode, and controlling a velocity of the UAV according to the location information of the flight restriction zone.

Abstract: A method for managing flight restricted regions for an unmanned aerial vehicle (UAV) includes an application processor receiving region information regarding the flight restricted regions from a database and processing the region information to obtain positional information of the flight restricted regions relative to the UAV, and a flight controller receiving the positional information of the flight restricted regions relative to the UAV and controlling flight of the UAV based on the received positional information. The flight controller is in communication with the application processor.

Abstract: A method for determining a flight strategy of an unmanned aerial vehicle includes determining a position of a ground device communicating with the unmanned aerial vehicle; determining a first flight state of the unmanned aerial vehicle according to the position of the ground device and a flight-restriction zone; and determining a scene of the unmanned aerial vehicle and the flight strategy corresponding to the scene according to the first flight state of the unmanned aerial vehicle.

Abstract: A flight restriction data update method includes sending an updating request to a server in response to an update triggering condition being satisfied, and receiving update data for a dynamic flight restriction database of a requesting device. The updating request includes current location information of the requesting device, and the update data is returned by the server according to the current location information.

Abstract: A method includes receiving, by a first receiver communicatively coupled with a first remote control device, a first control signal from the first remote control device. The method also includes receiving, by a second receiver communicatively coupled with a second remote control device, a second control signal from the second remote control device. The method further includes selecting one of the first control signal of the first remote control device and the second control signal of the second remote control device for controlling a movable object.

Abstract: A method for controlling flight of an unmanned aerial vehicle (UAV) includes obtaining information about a location of an object of interest, and calculating, during operation of the UAV, a flight-restricted distance for the UAV to maintain relative to the object of interest. The flight-restricted distance is calculated based on a safety factor and the safety factor is determined based on an object classification. The method further includes controlling flight of the UAV to maintain the flight-restricted distance relative to the object of interest.

Abstract: A troubleshooting method includes receiving a locking instruction instructing to lock a target aircraft and locking the target aircraft according to the locking instruction.