Abstract: A location of an unmanned aerial vehicle (UAV) is collected while the UAV is flying along a flight path. A communication signal distribution in a proximity of the location is determined. One or more relay locations for arranging one or more relays are determined based on the communication signal distribution to improve communication coverage along the flight path. An identification of the UAV is transmitted to an authentication center for authentication, without using the one or more relays, in response to determining, based on the communication signal distribution, that the UAV is capable of directly communicating with the authentication center or a communication network associated with the authentication center above a quality threshold.

Abstract: A method for establishing a data connection between a mobile terminal and a server includes sending a request for data connection to the server, generating a random password, transmitting the random password to the server for storing in the server, establishing the data connection between the mobile terminal and the server, and encrypting data to be transmitted through the communication connection using the random password.

Abstract: Systems and methods for UAV safety are provided. An authentication system may be used to confirm UAV and/or user identity and provide secured communications between users and UAVs. The UAVs may operate in accordance with a set of flight regulations. The set of flight regulations may be associated with a geo-fencing device in the vicinity of the UAV.

Abstract: The present invention provides for a composition comprising a heterostructure capable of electrochemical CO reduction to a carbon-carbon product, comprising an inorganic material and a porous molecule.

Abstract: An image processing method includes obtaining a current image frame. The image processing method also includes in response to feedback information, determining a reference image frame for coding the current image frame based on the feedback information. The feedback information is transmitted by a receiver based on a variable feedback time interval, and is configured to indicate a transmission status of an image frame transmitted by a transmitter to the receiver prior to the feedback information. The image processing method also includes coding the current image frame based on an inter-frame coding and the reference image frame to generate coded data. The image processing method further includes transmitting the coded data to the receiver.

Abstract: A wearable apparatus includes a first display screen having a first display plane, a second display screen having a second display plane, a first optical mirror including a first reflective surface facing the first display screen, a second optical mirror including a second reflective surface facing the second display screen, a first eyepiece arranged between the first display screen and the first optical mirror, and a second eyepiece arranged between the second display screen and the second optical mirror. An optical axis of the first eyepiece is approximately parallel to the first display plane. An optical axis of the second eyepiece is approximately parallel to the second display plane. The first reflective surface and the first display screen form a first predetermined angle. The second reflective surface and the second display screen form a second predetermined angle.

Abstract: A computer-implemented method includes receiving a feedback message from a receiver of image data. The feedback message includes a reference frame identifier associated with a reference frame correctly received or decoded by the receiver. The method further includes determining a difference between the reference frame identifier and a current frame identifier. The current frame identifier is associated with a current frame to be encoded and the difference indicates a number of frames between the reference frame and the current frame. The method also includes encoding the current frame based at least in part on the difference.

Abstract: An authentication method includes sending, by a device of an unmanned aerial vehicle (UAV), a device identification (ID) of the device and a randomly generated random number to an authentication apparatus of the UAV; receiving, by the device from the authentication apparatus, an encrypted session key and an encrypted random number that are obtained by the authentication apparatus based on the device identification; decrypting, by the device according to a device key of the device, the encrypted session key and the encrypted random number to obtain decrypted session key and decrypted random number, respectively; and determining, by the device, whether an authentication of the authentication apparatus is passed based on the randomly generated random number and the decrypted random number.

Abstract: A method for controlling a movable object includes obtaining, by one or more processors of the movable object, an image including a machine-readable code configured to store a set of operation data for controlling the movable object; processing the image to retrieve the machine-readable code and the set of operation data; and adjusting one or more operation parameters of the movable object based on the set of operation data to control an operation of the movable object.

Abstract: An image processing method includes sending, by a receiving terminal to a transmitting terminal according to a feedback time interval, a feedback message indicating a reception state of a received image frame sent by the transmitting terminal and received by the receiving terminal before the feedback message is sent; upon detecting a reception error of a target image frame before a first time point, sending a first feedback message indicating the reception error to the transmitting terminal at the first time point; and upon receiving, after the first time point and before a second time point, encoded data of the target image frame obtained according to an error correction mechanism from the transmitting terminal, sending a second feedback message indicating a correct reception to the transmitting terminal at the second time point. A time period between the first and second time points equals the feedback time interval.

Abstract: A flight data exchanging method includes receiving a control instruction for transmitting flight data of an aerial vehicle, encrypting the flight data, transmitting the flight data to a server, and receiving a transmission status of the flight data from the server.

Abstract: A printing consumable, an ink cartridge, and an ink cartridge reforming method are provided in the present disclosure. A printing consumable includes a first nozzle circuit, configured to feed back a first signal in response to a detection signal transmitted by a printer; and includes a second nozzle circuit, configured to not respond to the detection signal transmitted by the printer or configured to feed back a second signal different from the first signal in response to the detection signal, where the first nozzle circuit includes a nozzle circuit that has not been reformed and the second nozzle circuit includes a nozzle circuit that has been reformed. The second nozzle circuit includes a first circuit and a second circuit which includes a first conversion circuit and/or a second conversion circuit.

Abstract: A directional antenna tracking method includes obtaining first motion feature information of a first device, receiving second motion feature information transmitted from a second device, calculating tracking information of a first directional antenna of the first device with respect to a second directional antenna of the second device based on the first motion feature information and the second motion feature information, and controlling the first directional antenna to move according to the tracking information to face toward the second directional antenna.

Abstract: A method of providing communication coverage includes collecting a location of an unmanned aerial vehicle (UAV) while the UAV is flying along a flight path, determining a communication signal distribution in a proximity of the location, determining one or more locations for arranging one or more relays based on the communication signal distribution to improve communication coverage along the flight path, and instructing the UAV to communicate with a user terminal via at least one of the one or more relays when the UAV is determined, based on the communication signal distribution, to be incapable of directly communicating with the user terminal at a predetermined minimum quality level.

Abstract: An image processing method includes a transmitting terminal receiving a feedback message sent by a receiving terminal. The feedback message indicates a reception state of a received image frame sent by the transmitting terminal and received by the receiving terminal before the receiving terminal sends the feedback message. The method further includes acquiring a target image frame, encoding the target image frame according to a preset error correction mechanism to generate encoding data of the target image frame in response to the feedback message indicating a reception error, and sending the encoding data of the target image frame to the receiving terminal.

Abstract: A computer-implemented method includes receiving a feedback message including feedback information from a receiver of image data, obtaining a current frame to be encoded, encoding the current frame based at least in part on the feedback information, and transmitting the encoded current frame to the receiver.

Abstract: The present disclosure describes systems and methods for operating a movable object using a machine readable code. In one embodiment, an image may be obtained by the movable object. The image may include a machine-readable code configured to store a set of operation data for controlling the movable object. The movable object may process the image to retrieve the machine-readable code and the set of operation data. The movable object further may adjust one or more operation parameters of the movable object based on the set of operation data.

Abstract: A supervision method for a flight state of an unmanned aerial vehicle includes respectively establishing communication connections with the unmanned aerial vehicle and a supervision server, receiving identity information about the unmanned aerial vehicle and flight information about the unmanned aerial vehicle sent by the unmanned aerial vehicle, automatically sending the identity information about the unmanned aerial vehicle and the flight information to the supervision server in an on-line mode, receiving at least one of a flight restriction instruction or warning information sent by the supervision server, and forwarding the flight restriction instruction to the unmanned aerial vehicle, so that the unmanned aerial vehicle executes the flight restriction instruction, thereby restricting flight behaviour of the unmanned aerial vehicle in an on-line flight mode via the flight restriction instruction.

Abstract: An authentication method includes that an authentication apparatus of an unmanned aerial vehicle (UAV) generates a session key, the authentication apparatus receives a device identification (ID) of a device and a randomly generated random number from the device of the UAV, the authentication apparatus obtains a device key of the device according to the device ID of the device, the authentication apparatus encrypts the session key and the random number according to the device key of the device, and the authentication apparatus sends the encrypted session key and the encrypted random number to the device.

Abstract: A method of providing communication coverage includes collecting a location of an unmanned aerial vehicle (UAV) while the UAV is flying along a flight path, determining a communication signal distribution in a proximity of the location, determining one or more locations for arranging one or more relays based on the communication signal distribution to improve communication coverage along the flight path, and instructing the UAV to communicate with a user terminal via at least one of the one or more relays when the UAV is determined, based on the communication signal distribution, to be incapable of directly communicating with the user terminal at a predetermined minimum quality level.