Abstract: Provided in the embodiments of the present application is a blockchain hybrid consensus-based system for maintaining domain name information. A gTLD blockchain is formed by first network nodes where international generic top-level domain registries are located, and a ccTLD blockchain is formed by second network nodes where various countries codes top-level domain registries are located. In each blockchain, various network nodes of the blockchain participate in the domain name information update process, so that the domain name information update process will not be affected by a mistake or an attack on one network node. Compared to centralized maintenance methods, this decentralized maintenance method is more secure and is beneficial to maintaining the stability of the system.

Abstract: The application provides a method, a charging-discharging device, a cloud server, a system and a medium for charging-discharging interaction, which belong to the fields of electric power technologies. The method for charging-discharging interaction includes: the charging-discharging device transmits a vehicle-to-grid V2G function confirmation message to a battery management system of a target vehicle; when no V2G function feedback message fed back by the battery management system is received within a preset period of time after transmitting the V2G function confirmation message, the charging-discharging device transmits a first indication message to a cloud server to indicate that the target vehicle is V2G-disabled; in response to a non-V2G charging instruction received from the cloud server, the charging-discharging device performs a non-V2G charging for the target vehicle. The availability of the charging-discharging device can be improved according to embodiments of the present application.

Abstract: A battery formation apparatus includes a DC-DC conversion module, an additional power supply, and a control circuit. Low-voltage and high-voltage terminals of the DC-DC conversion module are electrically connected to the control circuit and a DC bus, respectively. The DC-DC conversion module is configured to, when a battery unit discharges into the battery formation apparatus, convert a first voltage input into a second voltage greater than the first voltage, and output the second voltage. The additional power supply is electrically connected to the control circuit, and configured to output an additional voltage. The control circuit is electrically connected to the battery unit, the low-voltage terminal of the DC-DC conversion module, and the additional power supply. The control circuit is configured to serially connect the low-voltage terminal of the DC-DC conversion module, the battery unit, and the additional power supply when the battery unit discharges into the battery formation apparatus.

Abstract: An energy storage apparatus includes a control circuit, multiple battery clusters connected in parallel, and switch circuits corresponding to the battery clusters. The switch circuit includes a first switch and a protection circuit connected in parallel. The control circuit is connected to each first switch and each protection circuit. Each battery cluster is connected to the corresponding first switch and protection circuit. The control circuit is configured to control, according to a high voltage on signal, the protection circuit to be closed and the first switch to be opened.

Abstract: Example solutions for multi-stage 8-bit floating point (FP8) matrix multiplication with format conversion, that benefit computation efficiency of matrix multiplication operations by a processor, include: copying data values in FP8 format from global memory to shared memory; loading thread block tiles of FP8 data values from the shared memory into a set of registers; converting each of the multiple FP8 data values in the set of registers to 16-bit floating point (FP16) data values; submitting the FP16 data values to the tensor core; and performing, with the tensor core, matrix multiply accumulate computations.

Abstract: A grouped consensus power allocation method for multiple energy storage units is provided, including determining a grouped coordination control strategy of multiple battery energy storage units (BESUs) of a BESS (battery energy storage system), where the multiple BESUs are communicated through a communication topology and grouped into a charging group and a discharging group, performing power coordination control power coordination control between the charging group and the discharging group based on a distributed algorithm, determining whether a switching between the charging group and the discharging group is triggered during an operation process of the BESS, and switching when it is triggered. The method can reduce the number of charging/discharging state conversions of the BESUs, prolong the service life of energy storage, ensure that the power allocation results meet the power constraints of the BESUs, reduce low-power operation times of the BESUs, and improve the efficiency of energy storage operation.

Abstract: An urban data prediction method based on a generative causal interpretation model is provided. The generative causal interpretation model includes exogenous variables, spatio-temporal conditional parent variables, controlled causal transition functions, and spatio-temporal mixing functions. By inferring the model's exogenous variables, causal descriptors, spatio-temporal conditional parent variables, and other causal latent variables from the observation data and fitting the corresponding functions such as the controlled causal transfer function and the spatio-temporal mixing function, the invention can predict the spatio-temporal data in city level based on the model. The observation data of the urban complex system can be decomposed into causal descriptors with physical meanings. Under the influence of stable causal structure, the robustness and applicability of the model can be improved, so that the prediction results are more in line with the operation of urban complex systems.

Abstract: A control method may include: controlling a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first leg, and a second leg set to turn on or off, to form in a first period a circuit loop for a charge/discharge module to discharge to a motor and to form in a second period a circuit loop for the charge/discharge module and the motor to charge a first electric vehicle battery group and a second electric vehicle battery group or form in the second period a circuit loop for the motor to charge the first electric vehicle battery group and the second electric vehicle battery group.

Abstract: Systems and methods are provided for training a data model based on training data. The training includes pre-training and fine-tuning the data model based on a combination of an autoregressive (AR) model and a non-autoregressive (NAR) model. Training data may be received and encoded into streams of tokens. A pre-trainer during decoding generates a continuum of data structures of the AR and NAR combined model including a main stream and a series of predicting streams. Masked tokens in predicting streams reference or attend to one or more preceding tokens in the main stream or the preceding predicting streams. A fine-tuner selects streams to generate a trained model according to a target data model. The target data model is determined based on balancing an accuracy constraint and an efficiency constraint for predicting tokens. The decoder acts as abridge between the AR and NAR models in generating a trained data model.

Abstract: An array substrate, a manufacturing method thereof and a display device are provided. The array substrate comprises a substrate, an active layer, a source and drain layer, a gate insulating layer and a gate. The active layer comprises an active section and a connecting section. The source and drain layer is disposed on the connecting section and contacts with the connecting section to be connected thereto; an area of a contact surface of the source and drain layer in contact with the connecting section is greater than an area of an orthographic projection of the contact surface of the source and drain layer in contact with the connecting section on the substrate.

Abstract: A ventilator system includes a first air tank, a plurality of second air tanks communicated with the first air tank, a plurality of breathing devices respectively communicated with the second air tanks, a plurality of first vacuum tanks respectively communicated with the breathing devices, and a second vacuum tank communicated with the first vacuum tanks. The first air tank has a positive pressure relative to the second air tanks. The second vacuum tank has a negative pressure relative to the first vacuum tanks.

Abstract: Embodiments of the present application provide a battery heating method, a charging device, and a battery management system, which can effectively heat a power battery. The method may be performed by a charging device, the method including: receiving first instruction information from a control device of a power battery before the charging device charges the power battery, where the first instruction information may be used to instruct the charging device to heat the power battery; and heating the power battery according to the first instruction information.

Abstract: A display panel and a display device are provided. The display panel includes an array substrate, a light-emitting device layer, and an ultraviolet light conversion layer. The ultraviolet light conversion layer is configured to convert high-energy ultraviolet light into low-energy ultraviolet light. When external high-energy ultraviolet light passes through the ultraviolet light conversion layer, it is converted into low-energy ultraviolet light by the ultraviolet light conversion layer. Low-energy ultraviolet light reaching inside of the panel has less influence on a luminescent material of the panel, thereby improving performance and service life of the display panel.

Abstract: A charging method for a secondary battery including a lithium-supplementing material. The method includes acquiring a first state of health of the secondary battery in response to the secondary battery being at a preset charging node, activating the lithium-supplementing material in response to the first state of health being less than or equal to a first threshold to supplement lithium for the secondary battery, performing a charging process on the secondary battery, determining a second state of health of the secondary battery based on a working parameter of the secondary battery in the charging process, and charging the secondary battery in response to the second state of health being greater than a second threshold.

Abstract: Aspects of the present disclosure relate to determining reference symbol transmission times. In some examples, a method for determining reference symbol transmission times for cellular communications includes receiving signal feedback based on a wireless communication channel between a wireless communication device and a base station, identifying a periodic exchange of reference symbols that are used to adjust beamforming between the wireless communication device and the base station, generating a vector based on the signal feedback, and providing the vector as an input to a trained machine learning model. A training of the trained machine learning model includes calculating a plurality of rewards for a respective plurality of transmission time delays. The plurality of rewards are each calculated based on a function of downlink throughput and uplink overhead. The function of downlink throughput and uplink overhead are based upon a priority level of the wireless communication device.

Abstract: A compound prism module is provided, including a first prism and a second prism. The first prism includes a first light-incident surface, a first reflecting surface, and a first light-emergent surface connected to each other, where the first light-incident surface and the first light-emergent surface are connected to each other on a first side edge. The second prism includes a second light-incident surface, a second reflecting surface, and a second light-emergent surface connected to each other, where the second light-incident surface and the second light-emergent surface are connected on a second side edge. The first light-incident surface and the second light-incident surface are connected to each other and are coplanar, the first reflecting surface and the second reflecting surface are connected on a third side edge, there is a spacing between the third side edge and a connection between the first light-incident surface and the second light-incident surface.

Abstract: Embodiments of the present disclosure provide a battery heating method, apparatus, device and storage medium. A battery heating method includes: acquiring a first temperature and a first state of charge of a battery; determining a first current frequency based on the first temperature, the first state of charge, and one or more preset first data tables, the first data tables including correspondence between the first temperature, the first state of charge, and the first current frequency under a condition of a first current amplitude; heating the battery based on the first current amplitude and the first current frequency. In the embodiments of the present disclosure, the current frequency and amplitude used for internal heating can be determined based on the temperature of the battery to improve the heating rate of the battery at various temperature environments.

Abstract: A heating method traction battery. The traction battery is connected to a switch circuit of a motor and configured to supply power to the motor via the switch circuit. The switch circuit includes multiple legs and the multiple legs are connected to the traction battery in parallel. The method includes: receiving a heating signal sent by a battery management system of the traction battery; and controlling, according to the heating signal, at least one of the multiple legs to form a short-circuit loop of the traction battery, the short-circuit loop being configured to discharge the traction battery and heat the traction battery during the discharging process.

Abstract: An electronic paper display, comprising a carrier device, a memory, a display panel, a sensing device and a processing device. The carrier device is arranged on a logistics box. The memory is arranged on the carrier device, and is configured to store a logistics data. The display panel is arranged on the carrier device, and is configured to generate a control voltage according to the logistics data to adjust a plurality of positions of a plurality of electrophoretic particles. The sensing device comprises at least one sensor, and is configured to sense at least one state parameter of the logistics box to generate at least one sensing signal. The processing device is coupled to the memory, the display panel and the sensing device, and is configured to send the at least one sensing signal through wireless transmission technology.

Abstract: System and method for testing power conversion devices are provided. A power supply grid is connected to an AC terminal of a first power conversion device, the power supply grid is also connected to an AC terminal of the second power conversion device, and a DC terminal of the first power conversion device is connected to a DC terminal of the second power conversion device. In this way, a test loop is formed by the power supply grid, the first power conversion device and the second power conversion device. In this test loop, the first power conversion device and the second power conversion device act as a load and a power source, so no additional DC power supply and load are required during the test.