Abstract: A computer system for assessing a power system component has processing circuitry to receive time series data from a sensor monitoring the power system component; preprocess said time series data; extract a plurality of features from the preprocessed time series data; employ a statistical testing method to said plurality of features to determine respective statistical significance of said features; feed one or more of said features having a statistical significance above a predetermined limit value into a machine learning model; quantifying contributions of predicted outputs from the machine learning model; and repeating the extracting, employing, feeding and quantifying until criteria is met to obtain an assessment of said power system component.

Abstract: The exemplary systems, methods, and devices of the present disclosure include a dual actuation mechanical switch for a circuit breaker that includes a piezoelectric actuator that operates in conjunction with a second mechanical actuator, e.g., for a fast, compact, lightweight, and efficient DC hybrid circuit breaker. In some implementations, the exemplary dual mechanical switch can serve as the only current carrying path of the circuit breaker to minimize on-state power loss during normal operation. The exemplary system, method, and devices can facilitate needs of the emerging DC grid.

Abstract: An example method of estimating an arc duration in a circuit breaker includes receiving a first measurement corresponding to a low-frequency electric field emitted from a vacuum circuit breaker during an interruption or circuit break operation and a second measurement corresponding to a low-frequency magnetic field, vibration, or acoustic emitted by the vacuum circuit breaker during operation, aligning the first measurement and the second measurement in time, wherein the first measurement is calibrated according to a first physical constant and wherein the second measurement is calibrated according to a second physical constant; and determining, by a sensor-fusion algorithm or a trained AI model, an estimated duration value of an arc duration using the time-aligned first measurement and second measurement, wherein the arc duration corresponds to a first time corresponding to a separation of contacts of the vacuum circuit breaker and a second time corresponding to arc extinction.

Abstract: The provided is a day-ahead and intra-day multi-time-scale optimal control method for a microgrid of a charging-swapping station. The day-ahead optimal scheduling is aimed at minimizing a net electricity purchase cost. The intra-day rolling optimal scheduling is aimed at minimizing a sum of the net electricity purchase cost and energy deviation penalty costs for energy storage systems and a charging-swapping station between a day-ahead scheduling plan and an intra-day rolling scheduling plan. The real-time feedback adjustment control is aimed at minimizing a sum of power deviations of distribution transformers, the energy storage systems, and the charging-swapping station between the intra-day rolling scheduling plan and a real-time feedback control.

Abstract: An exemplary air-breathing plasma engine and methods of operation are disclosed employing an arc plasma chamber that generates plasma, e.g., electrode-coupled, direct current plasma, via electrodes continuously fed by an electrode-feeding assembly. The plasma chamber can be implemented in any one of the stages following the compression stage and having high-pressure and high-velocity air flow, e.g., for a jet engine, turbojet engine, or rocket engine.

Abstract: An example wearable device is provided, that includes at least two dry electrodes that are electrically coupled with an external body surface of a wearer configured to obtain a neuromuscular signal. The example wearable device includes at least two dry electrodes that are electrically coupled with an external body surface of a wearer configured to obtain a neuromuscular signal. The example wearable device includes an amplifier configured to amplify the neuromuscular signals received from the at least two dry electrodes to produce an output signal. And the example wearable device includes one or more processors configured to obtain information identifying impedance associated with at least one of the two dry electrodes, wherein the information identifying the impedance is determined based on (i) the output signal from the amplifier and (ii) a characteristic of the amplifier.

Abstract: Provided are a support plate, a display screen, and an electronic device. The support plate includes a first board and a second board. The first board and the second board are arranged back to back, and the first board is configured to be attached to a display panel. The support plate includes a bending area, and the support plate is configured to bend in the bending area along a preset axial line L. First strip-shaped slots are formed on the first board, and second strip-shaped slots distributed in an array at intervals along the axial line L are formed on the second board. The first strip-shaped slots are continuously provided along the axial line L and extend through the first board to form a unified edge structure.

Abstract: A support assembly includes a support plate, a first adhesive layer, a substrate, and a second adhesive layer. The support plate, the first adhesive layer, the substrate, and the second adhesive layer are stacked from the bottom up. The substrate is attached to the support plate by using the first adhesive layer, and the support assembly is configured to attach to another structure by using the second adhesive layer, thereby forming a display module of a foldable-screen device. The support assembly includes a bendable region; the support assembly is configured to bend in the bendable region; the support assembly is provided with a plurality of first holes in the bendable region; and the plurality of first holes penetrate through at least the support plate and the substrate in a stacking direction of the support plate, the first adhesive layer, the substrate, and the second adhesive layer.

Abstract: Provided is an ultra-high structure and high specific surface area carbon black based on high crystallinity and a preparation method thereof, an electrode slurry, and a battery. The ultra-high structure and high specific surface area carbon black based on high crystallinity satisfies the following characteristics: (1) the degree of crystallinity is equal to or more than 39%; (2) the BET specific surface area ranges from 200 m2/g to 763 m2/g; (3) the OAN ranges from 334 mL/100g to 548 mL/100g; and (4) the average particle diameter of primary particles is equal to or less than 35 nm.

Abstract: An integrated active gear motor assembly may have a housing with a stator and a rotor located within the housing. The assembly may also have a motor output shaft located within the stator with a gear portion of the motor output shaft extending out of the housing. A drive gear may be connected to the gear portion of the shaft. The drive gear may be integrally formed, unitary and one-piece with the motor output shaft to rotate with the motor output shaft.

Abstract: According to one or more embodiments, a network node is provided. The network node includes processing circuitry configured to: determine a first resource block per symbol (RBSYM) quantity of a first portion of a frequency-time resource grid; determine a second RBSYM quantity of a second portion of the frequency-time resource grid, the second portion being associated a different Orthogonal Frequency-Division Multiplexing, OFDM, numerology than the first portion; and perform at least one action based at least in part on the first RBSYM quantity and the second RBSYM quantity.

Abstract: This application provides a laminated display module and an electronic device, including a cover layer, a thin film packaging layer, a display layer, and a support membrane layer that are sequentially covered through lamination from top to bottom. The cover layer includes a smooth region and two curved surface regions along a longitudinal direction. The two curved surface regions are respectively located on two sides of the smooth region, where each curved surface region includes one bending region, and each bending region is projected onto the support membrane layer to form a projection region. The support membrane layer includes a main support region and two side support regions along a longitudinal direction, and a gap is provided between either of the side support regions and the main support region.

Abstract: An encoder for encoding a current frame of an audio signal depending on one or more previous frames of the audio signal is provided. The previous frames precede the current frame, each of the current frame and the one or more previous frames having one or more harmonic components of the audio signal, each of the current frame and the one or more previous frames having a plurality of spectral coefficients in a frequency domain or in a transform domain. To generate an encoding of the current frame, the encoder is to determine an estimation of two harmonic parameters for each of the harmonic components of a most previous frame of the previous frames. Moreover, the encoder is to determine the estimation of the two harmonic parameters for each of the harmonic components of the most previous frame using a first group of three or more of the plurality of spectral coefficients of each of the previous frames of the audio signal.

Abstract: The present disclosure relates to the technical field of carbon black materials, and particularly to a granular carbon black and a preparation method therefor, an electrode and a secondary battery. For the granular carbon black, particle size distribution of the granular carbon black ranges as follows: a weight percent of granular carbon black with a particle diameter less than 0.125 mm is equal to or less than 2%, a weight percent of granular carbon black with a particle diameter ranging from 0.125 to 0.85 mm is from 18% to 60%, and a weight percent of granular carbon black with a particle diameter more than 0.85 mm is from 40% to 80%; and a secondary particle diameter D50 of the granular carbon black ranges from 2.0 ?m to 3.51 ?m.

Abstract: A system of tracking load switching operations and fault clearing operations of at least one circuit breaker in a power circuit includes at least one coil antenna sensing changes in a magnetic field around the coil antenna. The changes in the magnetic field induce corresponding changes to a current or voltage in the at least one coil antenna. A receiver is connected to the at least one coil antenna and receives the current or voltage. A computer is connected to the receiver and stores a data stream that corresponds to the changes in magnetic field around the at least one coil antenna. The computer uses the data stream to generate a plurality of characteristic magnetic field waveforms for the at least one circuit breaker. The computer assembles a low frequency magnetic signature for a respective circuit breaker from the characteristic magnetic field waveforms generated for the respective circuit breaker.

Abstract: An example method of estimating an arc duration in a circuit breaker includes receiving a first measurement corresponding to a low-frequency electric field emitted from a vacuum circuit breaker during an interruption or circuit break operation and a second measurement corresponding to a low-frequency magnetic field, vibration, or acoustic emitted by the vacuum circuit breaker during operation, aligning the first measurement and the second measurement in time, wherein the first measurement is calibrated according to a first physical constant and wherein the second measurement is calibrated according to a second physical constant; and determining, by a sensor-fusion algorithm or a trained AI model, an estimated duration value of an arc duration using the time-aligned first measurement and second measurement, wherein the arc duration corresponds to a first time corresponding to a separation of contacts of the vacuum circuit breaker and a second time corresponding to arc extinction.

Abstract: The disclosed computer-implemented method may include (1) sampling an output signal of an amplifier that amplifies a voltage difference between two electrodes, (2) calculating, based on a power spectral density of the output signal, a noise power of the output signal over a predetermined frequency band, (3) estimating an interface impedance of at least one of the two electrodes based on the noise power and a predetermined intrinsic current noise of the amplifier, and (4) performing an operation based at least in part on the estimated interface impedance. Various other methods, systems, and devices are also disclosed.

Abstract: A full slag covering, spatter-free flux-cored welding wire, relating to the technical field of welding material formulations, which includes a flux core and a metal sheath, wherein the flux core is a slag system based on a neutral slag of calcium oxide-titanium dioxide-aluminum oxide; and molten drops are prevented from flying out to form spatters under the action of liquid slag in a welding process. The flux core is composed of rutile, fluoride, titanate, aluminum powder, manganese powder, chromium powder, molybdenum powder and iron powder, and mass percentages of respective components are: 15%-35% rutile, 15%-35% fluoride, 3%-7% calcium titanate, 5%-10% aluminum powder, 10%-20% manganese powder, 3%-5% chromium powder, 3%-15% molybdenum powder, and a remainder is iron powder or nickel powder. The present welding wire solves the technical problems of weld spatter and poor stability in the traditional welding process.

Abstract: A battery assembly includes a battery pack; a battery pack seat for mounting the battery pack, the battery pack seat having a base for creating an electrical connection with the battery pack; and a sealing member arranged between the battery pack and the base. The base has a first terminal, and the battery pack has a second terminal matched with the first terminal. One of the first terminal and the second terminal penetrates the sealing member for creating the electrical connection via the other one of the first terminal and the second terminal. A related electrically started gasoline engine is also disclosed.

Abstract: Methods and systems for reducing electromagnetic interference in analog circuit of a control device for an augmented reality (AR) or virtual reality (VR) system are described. An analog circuit associated with the control device may include at least one amplifier and an analog-to-digital converter coupled to an amplifier by one or more electrical conductors. Electromagnetic interference induced in the one or more electrical conductors by an external AC magnetic field may be reduced using at least one component of the control device configured to reduce the electromagnetic interference.