Sz Dji Technology Co., Ltd.

Huawei Technologies Co., Limited

Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

Zte Corporation

Shenzhen China Star Optoelectronics Technology Co., Ltd.

General Hospital of Chinese Pla

Beijing Shen Mindray Med Elec Tech Res Inst Co Ltd

Wei Fan

Ming Gong

Ning Ma

Hao Cui

Han Huang

Jin Dai

Jun Wu

Xingsen Lin

Xinhua Rong

Xiaodong Wang

Cheng He

Wei Zhang

Zhenguo Li

Daohui Wang

Naibo Wang

Yongqiang Zeng

Lanxi Xiang

Zhile Zhang

Lei Zhu

Yigang Du

Ke Yi

Ge Luo

Jiefeng Cheng

Donghai Qin

Yadong Mu

Yan Wang

Ying Chen

Jie Tang

Kai Wang

Wei Xiao

Lei Sun

Kuangyao Chang

Yuan Wang

Liang Zhao

Chechang Hu

Yongqiang Dong

Maodong Sang

Wenyi Su

Xiaohui Wu

Guangjian Tian

Xirui Zhang

Yukun Luo

Jianfeng Qian

Haijian He

Caifeng He

Yingying Shen

Qingdong Yu

Mingbo Zhang

An ultrasonic imaging system and an imaging method. The imaging method comprises: transmitting a divergent ultrasonic beam to a scanning object, and scanning the scanning object with the divergent ultrasonic beam (S); a self-scanning object receiving an echo of the divergent ultrasonic beam, and obtaining divergent ultrasonic echo signals by means of beam synthesis (S); obtaining blood flow velocity vector information of the scanning object according to the divergent ultrasonic echo signals (S); and displaying the blood flow velocity vector information of the scanning object (S). Using a divergent ultrasonic beam to perform blood flow imaging can ensure that there is a sufficiently large scanning area for covering a scanning object, thereby achieving ultrasonic blood flow imaging at a high frame rate.

Ultrasonic imaging system and blood flow imaging method

An unmanned aerial vehicle (UAV) includes a sensor configured to detect an indicator of a geo-fencing device; and a flight controller configured to generate one or more signals that cause the UAV to operate in accordance with a set of flight regulations that are generated based on the detected indicator of the geo-fencing device.

Systems and methods for geo-fencing device communications

A method for regulating an unmanned aerial vehicle (UAV) includes receiving a UAV identifier and one or more types of contextual information broadcasted by the UAV. The UAV identifier uniquely identifies the UAV from other UAVs. The one or more types of contextual information includes at least geographical information of the UAV. The method further includes authenticating, via an authentication device, an identity of the UAV based on the UAV identifier to determine whether the UAV is authorized for operation, and transmitting a signal to a remote device in response to determining whether the UAV is authorized for operation.

Authentication systems and methods for generating flight regulations

An ultrasound imaging device and system, and an image enhancement method for ultrasound radiography and imaging. Image enhancement coefficients of location points in a examined biological tissue are computed first according to radiography channel data, and then, weighted processing is performed on the image enhancement coefficients and beam forming data.

Ultrasound imaging device and system, and image enhancement method for contrast enhanced ultrasound imaging

Embodiments of the present disclosure provide a flow imaging processing method, which may include determining flow imaging parameters, where the flow imaging parameters include a sound speed for calculation, a center frequency of the transmitting pulse for exciting a probe and a imaging depth; obtaining a velocity measurement range; and determining the first target number of the different transmit angles according to the sound speed for calculation, the center frequency of the transmitting pulse, the imaging depth and the velocity measurement range. The embodiments of the present disclosure also provide an ultrasound imaging device.

Flow imaging processing method and ultrasound imaging device

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.

Method, apparatus and system of providing communication coverage to an unmanned aerial vehicle

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.

A data transmission processing method is provided for a communication device. The method includes calculating a packet-error-rate level parameter after a basic adjustment process, if it is detected that the basic adjustment process is performed on a modulation and encoding policy of a sending end during a data packet transmission process; obtaining the packet-error-rate change information by comparing a packet-error-rate level parameter before the basic adjustment process with a packet-error-rate level parameter after the basic adjustment process; and performing an upgrade adjustment process on the modulation and encoding policy that is adjusted by the basic adjustment process, if the packet-error-rate change information satisfies a preset adjustment processing condition.

Method and device for transmitting and processing data packet, and communication device

A method for selecting a working wireless communication channel based on spectral estimation includes determining a sub-set of wireless communication channels from a set of wireless communication channels of a working frequency band. A superposition of channel frequency bands of the wireless communication channels in the sub-set covers the working frequency band. The method further includes performing a noise level measurement on each wireless communication channel in the sub-set to obtain a spectral estimation result for each wireless communication channel in the sub-set. The method further includes calculating a spectral density distribution across the working frequency band based on the spectral estimation results of the wireless communication channels in the sub-set. The method further includes selecting, according to the spectral density distribution across the working frequency band, one of the wireless communication channels from the set as the working wireless communication channel.

Working wireless communication channel selection based on spectral estimation

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.

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.

Image processing method and device

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.

System and methods for feedback-based data transmission

A transmission power setting method includes selecting one of a plurality of channels of a communication system as a target channel for communication, and, based on pre-set communication parameters, setting a transmission power of the communication system to be a maximum transmission power corresponding to the target channel. The pre-set communication parameters include maximum transmission powers for the plurality of channels.

Method and device for setting transmission power of communication system

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Wei Fan