Abstract: A control unit for a Power-to-Hydrogen (PtH) plant is provided. The control unit includes at least one model and is configured to: calculate maximum efficiency point tracking of the PtH plant by solving an objective function having a predetermined hydrogen production rate of the PtH plant or a predetermined amount of energy input to the PtH plant using the at least one model, wherein the control unit receives measured parameters indicative of status of components of the PtH plant as an input to the at least one model; determine one or more set points for a coordinated operation of the components of the PtH plant based on a solution obtained by solving the objective function; and provide the one or more set points to one or more of the components of the PtH plant to operate the PtH at the maximum efficiency point.

Abstract: An apparatus for power conversion and a method for operating the apparatus are provided. The apparatus comprises: at least one of a first partial power converter (PPC) string and a second PPC string, wherein the first PPC string comprising more than one series-connected PPCs, wherein respective second port of the more than one series-connected PPCs are connected in series to further connect to a DC bus; and wherein the second PPC string comprising at least one series-connected PPC and at least one PPC set, wherein each PPC set comprises more than one parallel-connected PPCs, the respective second ports of the more than one parallel-connected PPCs are connected in parallel and further connected to a port of the PPC set, and respective second ports of the at least one series-connected PPC and the port of the at least one PPC set are connected in series to further connect to the DC bus.

Abstract: An apparatus and a system for power conversion and a method for operating the apparatus are provided. The apparatus comprises: at least one first partial power converters (PPC) string connected in parallel with a DC bus, comprising at least one series-connected PPC and at least one PPC set, wherein each PPC set includes more than one parallel-connected PPCs, wherein, in each PPC set, a respective output of each PPC of the more than one parallel-connected PPCs is connected in parallel to form the output of the PPC set, and wherein, in the first PPC string, a respective output of each of the at least one series-connected PPC and the at least one PPC set is connected in series, and wherein, for each PPC of the at least one series-connected PPC and the more than one parallel-connected PPCs in the at least one PPC set, the input of the PPC is connected to a corresponding power source, and the input of the PPC and the output of the PPC have one common terminal.

Abstract: A transformer is provided. The transformer includes at least two transformers configured to electrically couple with each other and to supply power to a load via one or more converter modules. One or more transformers of the at least two transformers comprise a high-power secondary winding configured to transfer high power to the load and a low-power secondary winding configured to transfer low power to the load. The at least two transformers comprise at least two primary windings or at least two secondary windings configured to produce outputs that are shifted in phase relative to each other for reducing harmonics on the primary side of the transformer system.

Abstract: A battery energy storage system (BESS) and a method therefor is disclosed. The BESS includes a power converter system (PCS) for charging/discharging a battery including battery module(s) by using a superimposed control signal in which an electrochemical impedance spectra (EIS) reference signal for a state of health (SOH) evaluation of the battery is superimposed on a control signal for charging/discharging the battery. The EIS reference signal has a frequency selected for EIS. The BESS includes sensor(s) for detecting response data of the battery in the charging/discharging via the superimposed control signal. The BESS includes multiple levels of controller distributed in the BESS, the respective levels of controller communicating with each other. The response data being accessible to the respective levels of controller. The SOH evaluation is conducted in such a dynamic manner that the response data is processed at any level of controller to obtain a result.

Abstract: This application provides a method for determining a receive parameter used for channel measurement, including: receiving measurement configuration information, where the measurement configuration information includes configuration information of at least one resource; and if any one or more of the following conditions are met, determining that the at least one resource and n resources have a same receive beam, where the n resources are n resources that can be simultaneously received, and n?2; the condition includes: the at least one resource has a same transmission configuration index (TCI) configuration as one of the n resources; the at least one resource has a same TCI configuration as one of the n resources, and a parameter groupBasedBeamReporting is further configured in the measurement configuration information; or the at least one resource has a same TCI configuration as one of the n resources, and a value of a configured parameter groupBasedBeamReporting is enabled.

Abstract: An apparatus including a first AC-to-DC converter, a first DC-to-AC converter and a second AC-to-DC converter, the first AC-to-DC converter connected with a low voltage arm of a high voltage divider to obtain a voltage measurement signal, the first DC-to-AC converter configured to output a modulated signal of the voltage measurement signal, the second AC-to-DC converter configured to output a demodulated signal of the voltage measurement signal; a high-frequency transformer including a primary coil connected with an output terminal end of the first DC-to-AC converter and a secondary coil connected with an input terminal of the second AC-to-DC converter; and a controller configured to control switching devices of the first DC-to-AC converter to control a turn-on sequence of each switching device, to calculate signal parameters, and to output the calculated signal parameters.

Abstract: The present disclosure relates to a method for obtaining a state of health, SOH, and state of charge, SOC, of a battery. The method comprises obtaining real-time data of the battery, the real time data including voltage, current, temperature, initial SOC, and an initial SOH, obtaining battery parameters from a look up table, LUT, based on the real-time current, temperature, initial SOC, and an initial SOH and obtaining a new SOC and new SOH based on the battery parameters, real-time current, real-time voltage, initial SOC, and initial SOH. The disclosure further relates to a corresponding device, system and computer-readable storage medium.

Abstract: An apparatus for power conversion is provided. The apparatus comprises: a plurality of partial power converters (PPCs), wherein each of the plurality of PPCs comprises three ends, the three ends being combined in pairs to form three sets of ends, and wherein a first one of the three sets of ends is connected or connectable to a DC bus, and a second one of the three sets of ends is connectable or connected to a respective power source of a plurality of power sources.

Abstract: A backplane, a display, and a display module are provided. The backplane includes a guide slot and a connecting element. The connecting element is disposed on the guide slot, and the connecting element matches the guide slot in shape. The connecting element is configured to connect the backplane with another backplane. The display and the display module include the above-mentioned backplane.

Abstract: Embodiments of the present application disclose a display device including a bendable display panel; a curvature adjusting mechanism, the curvature adjusting mechanism including at least one supporting back plate, the supporting back plate including a back plate body and at least one tightening-loosening member, the tightening-loosening member being deformationally linked with the back plate body; an adjusting portion movably connected to the tightening-loosening member. In the present application, the curvature of the display device may be adjusted by the cooperative work between the curvature adjusting mechanism and the adjusting portion, thereby meeting diversified user requirements.

Abstract: The present disclosure provides a hetero-integrated terahertz low-noise miniaturized image frequency rejection transceiver front-end, including an intermediate frequency circuit and a terahertz circuit arranged up and down, where the terahertz circuit includes a local oscillator frequency tripler, a 135° 3 dB filter coupler, a radio frequency waveguide power divider, and two quartz hetero-integrated subharmonic mixers; resonant cavities of an input unit, a first output unit, an isolation unit, and a second output unit of the 135° 3 dB filter coupler are sequentially coupled through resonant grooves to form a ring structure, a cavity length of the resonant cavity of the input unit is twice that of the resonant cavities of the other three units, and an electrical length of a waveguide of the first output unit is 45° different from that of a waveguide of the second output unit.

Abstract: Disclosed are (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate, a waterborne polyurethane, and preparation methods thereof. The (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate could be used as a modified monomer for preparing a waterborne polyurethane, and substituents at a C2 position of the (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate are two fluorine atoms and one bromine atom. When it is used for preparing the waterborne polyurethane, fluorine and bromine groups are introduced into the structure of the waterborne polyurethane, and the resultant waterborne polyurethane exhibits good moisture resistance and flame retardance.

Abstract: The present disclosure provides a GaAs monolithic integrated terahertz low-noise communication system transceiver front-end, including an intermediate frequency circuit and a terahertz circuit. The terahertz circuit includes a local oscillator frequency tripler, a local oscillator unidirectional 3 dB filter coupler, a radio frequency 180° filter coupler, and two terahertz GaAs monolithic integrated subharmonic mixers. The local oscillator unidirectional 3 dB filter coupler and the radio frequency 180° filter coupler each include one ring-cylindrical resonant cavity and four rectangular waveguides. The ring-cylindrical resonant cavity is divided into four rectangular waveguides which are correspondingly connected to the four sector-annular resonant cavities, respectively.

Abstract: Provided is a fringe line detection and phase unwrapping method and system based on an FL-Net convolutional neural network. The method includes: constructing the FL-Net convolutional neural network; detecting fringe lines of an input image by using the FL-Net convolutional neural network to obtain an image with detected fringe lines; performing circulation integral on the detected fringe lines to repair the detected fringe lines to thereby obtain an image with repaired fringe lines; performing path integral on the repaired fringe lines to unwrap the repaired fringe lines to thereby obtain an image with unwrapped fringe lines; and identifying error points of the unwrapped fringe lines by using the FL-Net convolutional neural network; and processing the error points. Specifically, an HDC method is used to replace a down-sampling method to avoid the loss of resolution, and residual connection is used to prevent the network from being too deep.

Abstract: The present invention provides a 3D wireless optical positioning method and system, including the steps of: arranging two LED lamps on the ceiling to transmit optical information and provide illumination; arranging a receiver including two photodetectors in a receiving plane; calculating the distance between the LED lamps and the photodetectors respectively through the TOA (Time of Arrival) method; and finally determining the actual position and orientation angle of the receiver based on the geometrical relationship between the LED lamps and the photodetectors in the XYZ coordinate system, the two photodetectors having a distance determined as l therebetween and being situated in the same receiving plane, the receiver being situated below the two LED lamps, the range where the receiver is to be positioned being on any side of the plane consisting of the two LED lamps and the origin.

Abstract: A method for controlling at least one power converter is disclosed. The method includes generating at least one electrochemical impedance spectra (EIS) reference signal, the at least one EIS reference signal each having a frequency selected for EIS: superimposing the at least one EIS reference signal respectively on at least one control reference signal to produce at least one superimposed reference signal: controlling the at least one power converter respectively based on the at least one superimposed reference signal to cause respectively charging/discharging at least one battery module: acquiring at least one response signal produced respectively by the at least one battery module; and calculating at least one EIS respectively for the at least one battery module respectively based on the at least one superimposed reference signal and the at least one response signal.

Abstract: The present disclosure relates to a method and control module for operating an electrolysis plant (EP), an electrolysis plant, and a method for dispatching at least one electrolysis plant in a power system. The electrolysis plant comprises an electrolysis stack assembled from a plurality of electrolysis cells. The method for operating the electrolysis plant comprises, by a control module, adapting a multiphysics model to a plurality of operation parameters of the electrolysis plant. The multiphysics model comprises a one-dimensional liquid-gas diphasic flow model and an electrochemical model coupled with the diphasic flow model. The plurality of operation parameters comprises preset parameter(s) and parameter(s) to be calculated. A value of each parameter to be calculated is calculated according to a preset value of the preset parameter(s) by means of the multiphysics model. Control to the electrolysis plant is executed according to the calculated value of the parameter(s) to be calculated.

Abstract: A terahertz full-duplex co-local oscillator solid-state front-end transmitting circuit is disclosed, which belongs to the technical field of terahertz communication. The overall structure of the solid-state front-end transmitting circuit adopts a new system, wherein the circuit comprises two branches that are parallel and driven by a local oscillator source. A branched waveguide directional coupler is configured to output two driving signals provided by the same local oscillator source respectively to two branch circuits with required powers. Two transmission signals generated from the two branches are combined into one signal for transmission through an orthogonal mode coupled duplexer, so as to fulfill the construction of a full-duplex co-local oscillator solid-state front-end transmission circuit.

Abstract: A backplane, a display, and a display module are provided. The backplane includes a guide slot and a connecting element. The connecting element is disposed on the guide slot, and the connecting element matches the guide slot in shape. The connecting element is configured to connect the backplane with another backplane. The display and the display module include the above-mentioned backplane.