Abstract: The disclosure provides a distributed dispatch method for ubiquitous power Internet of Things based on a transition matrix. The ubiquitous power Internet of Things includes generators. The method includes: S1, setting a marginal cost function of each of the generators, and extracting key cost parameters in the marginal cost function; S2, establishing an optimization model based on the key cost parameters of each of the generators and a communication topology of the ubiquitous power Internet of Things, and solving the optimization model to obtain an optimized transition matrix; and S3, generating a plan of a power output of each of the generators based on the optimized transition matrix and a distributed dispatch protocol to perform a distributed dispatch.

Abstract: A low-floor electric axle assembly including: an axle housing, two hub motors, two planetary gear reducers, two hubs, a brake system, two C-shaped beams, and a suspension system. Mechanical mounting of the suspension system is compatible with a conventional axle. The axle housing has a left and right symmetrical dumbbell-shaped structure configured to bear a weight of a vehicle. The hub motors are inner rotor type motors and are separately arranged at two ends of the axle housing left and right symmetrically. The hub motors are arranged coaxially with two wheels respectively. Two hub motor rotors are connected to the planetary gear reducers respectively. Each of the planetary gear reducers is a single-stage planetary gear reducer. A sun gear of each of the planetary gear reducers receives power outputted by each of the hub motor. Two planetary gear reducer housings are power output ends connected to two rims respectively.

Abstract: A boundary protection method and system of a radiation detection robot. The boundary protection method comprises: a first laser radar and a second laser radar are arranged diagonally, a first marking rod and a second marking rod are arranged diagonally; a boundary of an interlocking zone is defined by the first laser radar, the second laser radar, the first marking rod and the second marking rod; the object to be detected is placed in the interlocking zone; the radiation detection robot uses rays to detect the object to be detected in the interlocking zone; an early warning zone is provided outside the interlocking zone; wherein when it is detected that a person or object has intruded into the interlocking zone, the radiation detection robot stops emitting rays; and when it is detected that a person or object has intruded into the early warning zone, a warning is issued directly.

Abstract: Disclosed is a plane grating calibration system, comprising an optical subsystem, a frame, first vibration isolator, a vacuum chuck, a workpiece stage, second vibration isolator, a base platform and a controller; the optical subsystem is mounted on the frame, and the frame is isolated from vibration by the first vibration isolator; the vacuum chuck is rotatably mounted on the workpiece stage, the workpiece stage is positioned on the base platform, and the base platform is isolated from vibration by the second vibration isolator. A displacement interferometer is integrated into the optical subsystem, and the entire optical subsystem adopts a method of sharing a light source, thereby avoiding the problems of low wavelength precision and poor coherence of separate light sources.

Abstract: Disclosed is a centralized cloud energy storage system for massive and distributed users and a transaction settlement method thereof, a storage medium, and a terminal. The system includes: a centralized energy storage facility invested and operated by a cloud energy storage service provider; the massive and distributed users; and a power network and a user energy management system connecting the centralized energy storage facility with the massive and distributed users. A user sends a charging and discharging request to the cloud energy storage service provider through the user energy management system, and the cloud energy storage service provider issues a charging and discharging instruction to the centralized cloud energy storage system.

Abstract: Embodiments of the present disclosure provide a dual-modality neuromorphic vision sensor. A first-type current-mode active pixel sensor (APS) circuit can mimic excitatory rod cells, to perceive light intensity gradient information in a target light signal, thereby improving a dynamic arrange of an image sensed by a neuromorphic, vision sensor and its shooting speed. In addition, a first-type control switch is introduced for each of non-target first-type photosensitive devices, to control the obtained light intensity gradient information, and adjust the dynamic arrange of the image sensed by the neuromorphic vision sensor, thereby adjusting the shooting speed, and realizing a reconfigurable effect A voltage-mode APS can mimic cone cells, to output a target voltage signal representing light intensity information in the target light signal, and perceive the light intensity information in the target light signal.

Abstract: A cyberspace coordinate system creation method and apparatus based on an autonomous system is provided. The method includes: determining a cyberspace coordinate system; constructing a framework for a three-dimensional cyberspace coordinate system; constructing a cyberspace map model based on the cyberspace coordinate system and the framework for the three-dimensional cyberspace coordinate system; and designing an application scenario corresponding to a constructed cyberspace map model, and performing visualization processing on the application scenario. The method may realize the visualization of multi-dimensional information of cyberspace based on a unified and constant backboard, e.g., an Autonomous System (AS) topology, an Internet Protocol (IP) address composition, network resource element information, a hierarchical structure, and the like, and is suitable for visualization of a number of security attacks on the cyberspace and network management scenarios.

Abstract: An antenna structure, an electronic device, and a wireless network system are provided, and relate to the field of antenna technologies. A patch antenna array includes four patch antennas. The four patch antennas are arranged in two rows and two columns. One of the feeding structures is included between two of the patch antennas in each row. One of the feeding structures is included between two of the patch antennas in each column. The feeding structure located between the two patch antennas in each column is connected to the first feeding port, so that the four patch antennas all generate polarization in a first direction. The feeding structure located between the two patch antennas in each row is connected to the second feeding port, so that the four patch antennas all generate polarization in a second direction.

Abstract: Embodiments of this application relate to the video coding and compression field, and disclose an encoding method and apparatus, and a decoding method and apparatus, to resolve a problem that an existing split mode cannot satisfy a relatively complex texture requirement. The decoding method specifically includes: parsing a bitstream to determine a basic split mode for a current to-be-decoded picture block and a target derivation mode for a subpicture block of the current to-be-decoded picture block; splitting the current to-be-decoded picture block into N subpicture blocks in the basic split mode, where N is an integer greater than or equal to 2; deriving one derived picture block from at least two adjacent subpicture blocks in the N subpicture blocks in the target derivation mode; and decoding the derived picture block.

Abstract: The present disclosure relates to a security inspection device and a transfer method, and the security inspection device includes an arm frame, provided with detectors, and configured to form an inspection channel; a first compartment, internally provided with a radiation source and connected with the arm frame, a protection wall, connected with the first compartment or the arm frame, and configured to perform radiation protection for an object to be protected, and a tire assembly, configured to enable the security inspection device to move relative to the ground, and the arm frame, the first compartment, the protection wall and the tire assembly are set to be transported together in a connected state.

Abstract: Provided is a method for simultaneous detection of parameters of membrane electrode assemblies of a fuel cell stack, which includes: supplying hydrogen to an anode of the fuel cell stack and inert gas to a cathode of the fuel cell stack, controlling operating conditions of the fuel cell stack at respective preset values; applying different voltage excitations or micro-current excitations to the fuel cell stack, collecting a current signal of an entire stack and a voltage signal of each fuel cell; and analyzing a hydrogen crossover current, a catalyst electrochemical surface area, a double-layer capacitance, and a short-circuit resistance of a membrane electrode assembly of each fuel cell based on an excitation-response formula of a fuel cell. The present disclosure does not limit a form of a current or voltage excitation, thereby improving accuracy of a parameter test of a membrane electrode assembly while reducing the test cost.

Abstract: An electrical impedance imaging method, a system, a storage medium and an electronic device. Said method comprises: acquiring electrical impedance measurement signals of a tested human body area at a plurality of measurement times; for the electrical impedance measurement signal at each measurement time, constructing a corresponding instantaneous differential image on the basis of the electrical impedance measurement signal; constructing an image matrix on the basis of the instantaneous differential images corresponding to the plurality of measurement times, each column in the image matrix being a vector corresponding to the instantaneous differential image; determining, on the basis of the image matrix, a covariance matrix corresponding to the image matrix; obtaining, according to the covariance matrix, a weight vector of the covariance matrix; and obtaining, on the basis of the covariance matrix and the weight vector, an electrical impedance state image of the tested human body area.

Abstract: The present disclosure relates to a static CT detection device, including: a shielding body, formed with a detection channel through which an object under detection can pass; a ray source, emitting rays for detecting the object under detection when the object under detection passes through the detection channel; and a detector, for acquiring the rays emitted by the ray source and having passed through the detection channel, wherein the shielding body is formed with an opening portion, and the opening portion extends from an inlet of the detection channel to an outlet of the detection channel.

Abstract: An unsupervised image segmentation method includes: performing a superpixel segmentation on an image containing a target object to acquire a plurality of superpixel sets, each superpixel set corresponding to a respective superpixel node; generating an undirected graph according to superpixel nodes; determining foreground superpixel nodes and background superpixel nodes in the undirected graph according to a first label set corresponding to the plurality of superpixel nodes; generating a minimization objective function according to the foreground superpixel nodes and the background superpixel nodes; segmenting the undirected graph according to the minimization objective function to acquire a foreground part and a background part and to generate a second label set; and performing an image segmentation on the image according to a comparison result of the first label set and the second label set.

Abstract: The disclosure provides a method for identifying a power feasible region of a virtual power plant, and an apparatus for identifying a power feasible region of a virtual power plant. The method includes: S1, obtaining operation basic data of the internal power-distribution system; S2, establishing a static safety-constrained model of the virtual power plant based on the operation basic data, in which the static safety-constrained model is based on alternating current power flow equations; S3, establishing a power feasible region model of the virtual power plant based on the static safety-constrained model; and S4, calculating the power feasible region model based on the operation basic data and a feasible region vertex enumeration algorithm to obtain the power feasible region of the virtual power plant.

Abstract: The present disclosure relates to an evaluation method and system for steering comfort in a human machine cooperative take-over control process of an autonomous vehicle, and a storage medium, thereby avoiding a defect that most comfort evaluation methods are applicable only in laboratory conditions, and also solving a problem that most comfort evaluation methods do not consider non-traditional control characteristics of a driver in a take-over control process. The method of the present disclosure includes: acquiring vehicle data information in a current driving cycle, and preprocessing the vehicle data information to form preprocessed vehicle data information; and using the preprocessed vehicle data information as an input to a well-trained comfort model library, and performing log probability matching calculation on the basis of the comfort model library, to form a comfort recognition result corresponding to comfort.

Abstract: A reactive power-voltage control method for integrated transmission and distribution networks is provided. The reactive power-voltage control method includes: establishing a reactive power-voltage control model for a power system consisting of a transmission network and a plurality of distribution networks; performing a second order cone relaxation on a non-convex constraint of the plurality of distribution network constraints to obtain the convex-relaxed reactive power-voltage control model; solving the convex-relaxed reactive power-voltage control model to acquire control variables of the transmission network and control variables of each distribution network; and controlling the transmission network based on the control variables of the transmission network and controlling each distribution network based on the control variables of the distribution network, so as to realize coordinated control of the power system.

Abstract: A method includes: pre-processing initial data of an acquired to-be-analyzed confrontation scenario, to obtain triplet data marked in a graph data structure, inputting the triplet data into a pre-trained analyzing model, to determine a result of analysis on semantic information of the to-be-analyzed confrontation scenario; wherein the analyzing model includes a plurality of operator networks that are provided with execution priorities, wherein the plurality of operator networks are configured for analyzing relations of different types; and the processing result of any one of the operator networks includes: in the relation type corresponding to the operator network, respective true relations of all of the node pairs, and confidences and descriptive values of the true relations; and according to the graph data structure that is updated by using the processing results of all of the operator networks, characterizing the result of analysis on the semantic information of the to-be-analyzed confrontation scenario.

Abstract: A method for calibrating a driving risk identification model includes: S1. establishing a vehicle platform by installing an information acquisition device on a test vehicle; S2. acquiring synchronized test data related to the test vehicle and driving scenarios; S3. extracting moments when the drivers start to press the accelerator pedal, start to release the accelerator pedal, start to press the brake pedal in the driving scenarios, and start to release the brake pedal, so as to define risk level values respectively corresponding to the moments; S4. obtaining a risk identification curve of the drivers in different driving scenarios, wherein the risk identification curve represents the drivers' judgment of the risk level over time; S5. using the risk identification curve to calibrate the driving risk identification model.

Abstract: A method and a device for gigapixel-level light field intelligent reconstruction of a large-scale scene are provided. The method includes: obtaining a coarse three-dimensional geometric model based on a multi-view three-dimensional reconstruction system; constructing an implicit representation of the meta-deformed manifold on the coarse three-dimensional geometric model; and optimizing the implicit representation of the meta-deformed manifold to obtain the light field reconstruction in the form of free viewpoint rendering of the large-scale scene.