Abstract: A parent cryptographic key associated with a blockchain object is obtained. A number of parties (N) to share control over the blockchain object is obtained. N child cryptographic keys are generated based on the parent cryptographic key by applying a predetermined algorithm to the parent cryptographic key, wherein N is an integer greater than or equal to 2, and wherein the N child cryptographic keys are collectively configured to enable reconstruction of the parent cryptographic key.

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: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for evaluating risk are provided. One of the methods includes: obtaining a plurality of transactions each comprising a plurality of data dimensions, wherein some of the plurality of transactions are labeled as risky transactions and some of the plurality of transactions are labeled as safe transactions; obtaining at least one of the plurality of data dimensions as an output space and the plurality of data dimensions other than the at least one data dimension as an input space; initializing a first mapping from the input space to a latent space and a second mapping from the latent space to the output space, wherein the first mapping comprises mapping the input space to the latent space according to an inverse of a generalized linear model; and optimizing the first mapping and the second mapping to generate a Bezier surface.

Abstract: The application shows a method, an apparatus, and an electronic device for processing an image. The method includes: obtaining an image of a first rendering style; obtaining an image of a second rendering style according to the image of the first rendering style and a first preset processing model; generating at least one first intermediate gradient image according to the image of the first rendering style, the image of the second rendering style, and a second preset processing model, the at least one first intermediate gradient image comprising an image in a process of gradient from the image of the first rendering style to the image of the second rendering style; generating a first gradient video according to the image of the first rendering style, at least one first intermediate gradient image, and an image of the second rendering style.

Abstract: An optical transmitter transmits a data signal. The optical transmitter includes an encoder configured to encode the data signal by selecting based on a bit sequence, a first symbol and a second symbol from a set of four symbols for each one of at least two transmission time slots. The optical transmitter further includes a modulator configured to use in each transmission time slot the first symbol to modulate a first carrier wave and the second symbol to modulate a second carrier wave, and to transmit the two carrier waves over orthogonal polarizations of an optical carrier. Symbols in consecutive transmission time slots have non-identical polarization states.

Abstract: The present application discloses an OLED display device including an OLED display panel. The OLED display panel has a first display area and a second display area disposed around the first display area, wherein a first pixel electrode layer in the first display area includes at least a two-layered indium tin oxide (ITO) conductive layer, and a second pixel electrode layer in the second display area is a three-layered ITO/Ag/ITO conductive layer.

Abstract: The present embodiments provide a method for managing a hardware resource, a method for querying a location of a hardware resource, and a related apparatus. The method for managing a hardware resource includes receiving, by a virtualized infrastructure manager (VIM), a hardware resource allocation request message sent by a VNF management entity, where the hardware resource allocation request message is used to request the VIM to allocate a hardware resource to a virtual machine that runs a VNFC, and the hardware resource allocation request message includes location information of the hardware resource that the virtual machine requests to allocate. The method also includes allocating, by the VIM, the hardware resource at a corresponding location to the virtual machine according to the location information of the hardware resource.

Abstract: The present utility model provides a spherical tent frame, comprising a plurality of support rods and a plurality of connecting members, each of the connecting members is provided with at least two connectors and each of the connectors is axially embedded with a socket; wherein an annular groove is provided in a position of the inner wall of the socket close to the bottom, and a plurality of elastic pieces pointing to the center of the bottom of the socket are arranged along the upper edge of the annular groove; both ends of each of the support rods are inserted to the socket to form a hemispherical frame put up with triangles as a unit and the connecting member as a vertex.

Abstract: A data transmission method includes: configuring, by a base station, first downlink control information (DCI) for a terminal device, where the first DCI includes scheduling information used for data transmission; sending, by the base station, the first DCI to the terminal device; configuring, by the base station, second DCI for the terminal device, where the second DCI includes first information, and the first information includes information used to indicate the terminal device to perform transmission of a first data packet with the base station according to the first DCI; sending, by the base station, the second DCI to the terminal device; and performing, by the base station, transmission of the first data packet with the terminal device.

Abstract: A scanning circuit, a driver circuit, a touch display panel, a receiving switching circuit and a driving method are disclosed. The scanning circuit includes a function switching circuit and a plurality of shift register units that are cascaded. Each shift register units includes a control terminal and a shift scanning output terminal, and is configured to output a first output signal at the shift scanning output terminal; the function switching circuit includes a mode switching input terminal, a control signal output terminal and a mode scanning output terminal, and the control signal output terminal and the mode scanning output terminal are respectively connected to the control terminals and the shift scanning output terminals of the plurality of shift register units. The function switching circuit is configured to output the control signal to the control terminals or to output a second output signal to the shift scanning output terminals.

Abstract: Optical sensing is provided to detect two-dimensional spoof objects using bright-dark reversal imaging. For example, embodiments can operate in context of an under-display optical fingerprint sensor integrated into an electronic device, such as a smartphone. An optical scanning system is configured so that direct illumination incident on a defined sensing region is redirected, by internal specular reflection off of a contact surface, onto an optical sensor in a bright-dark pattern corresponding to the pattern of contact an object and the contact surface. Masking of direct illumination in a certain region of the contact surface inhibits specular reflection in that region, such that optical information is directed to the optical sensor from that region only by non-specular reflection. Three-dimensional (real) and two-dimensional (spoof) objects tend to manifest different optical responses to the lack of specular reflection in the masked region, which can be exploited to detect such spoofs.

Abstract: Implementations of this disclosure provide for certificate application operations. An example method includes sending, from a terminal device, a subscription topic name to a gateway to establish a data transmission channel between the terminal device and the gateway; receiving by the terminal device, via the data transmission channel, a certificate installation instruction from a certificate server; generating, by the terminal device, a user certificate request based on the certificate installation instruction; sending the user certificate request to the certificate server; and receiving, via the data transmission channel, a user certificate from the certificate server.

Abstract: A display panel and a preparation method thereof, the display panel includes a substrate layer, a passivation layer, a plurality of color resisting units, a plurality of anodes, a pixel definition layer, a light emitting layer and a cathode. The present disclosure through makes at least one of the color resisting units partially cover a projection of the light emitting layer on the color resisting units to overcome the problem that part of the light emitted from the light emitting layer passing through the color resistance unit for adjusting a color gamut, and the brightness of part of the unadjusted light will not lost, thus, at last, the display panel has lack of display brightness due to adjusting the color gamut of the display and using the color resistance unit.

Abstract: User data from a received service processing request initiated by a user for processing a service is parsed. Whether the user data is included in a trusted user list or a risky user list stored in a server for processing the service is determined. Whether the user data matches historical behavior data associated with the user based on a behavioral profile comparison rule model if the user data is not included in the trusted user list or the risky user list is determined. A risk type associated with the user data is determined if the user data fails to match the historical behavior data. A risk identification rule model associated with the risk type is determined based on the service requested. Risk identification is performed based on the user data using the determined risk identification rule model. The service is processed by the server based on a result of the risk identification.

Abstract: A method for improving Wi-Fi performance and a terminal the method includes determining, by a terminal, whether a currently working Wi-Fi channel is interfered by an HDMI signal and whether strength of a received Wi-Fi signal is less than or equal to a preset signal strength threshold, where the terminal is configured with a Wi-Fi module and an HDMI port; and if the currently working Wi-Fi channel is interfered by the HDMI signal, and the strength of the received Wi-Fi signal is less than or equal to the preset signal strength threshold, controlling, by the terminal, a Wi-Fi antenna most greatly interfered by the HDMI signal to stop receiving/sending a signal. According to the embodiments of the present disclosure, interference from the HDMI signal to the Wi-Fi signal can be reduced, and Wi-Fi performance can be improved without increasing hardware complexity and hardware costs.

Abstract: A multi-zone battery station is provided, comprising a plurality of landing areas configured to support a UAV. The battery station may permit battery life to be reloaded onto a UAV, which may include recharging a battery of the UAV or exchanging the UAV battery for a new battery. The different zones may accommodate different UAV types, different battery types, or operate in accordance with different energy provision rules. A marker may be provided on a landing area to aid in guiding the UAV to an appropriate landing area.

Abstract: A service data transmission method, user equipment, and a network device are provided. The method includes: determining, by a network device, a control message used to indicate at least two SPS configurations, and sending the control message to user equipment; and receiving, by the user equipment, the control message sent by the network device, and activating the at least two SPS configurations based on the control message, where each of the at least two activated SPS configurations is used to transmit corresponding service data. In embodiments of the present invention, at least two SPS configurations can be simultaneously performed, thereby improving service data transmission efficiency.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for storing blockchain data based on error correction code. One of the methods includes determining, by a blockchain node, block data associated with a current block of a blockchain; performing error correction coding of the block data to generate encoded data; dividing, based on one or more predetermined rules, the encoded data into a plurality of data sets; storing, based on the one or more predetermined rules, one or more data sets of the plurality of data sets; hashing each data set of remaining data sets of the plurality of data sets to generate one or more hash values corresponding to the remaining data sets; and storing the one or more hash values.