Abstract: A lithium-ion secondary battery is disclosed. The battery includes a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a current collector and a positive electrode film layer on at least one side of the current collector. The film layer includes a positive electrode active material comprising lithium-containing transition metal phosphate particles, at least a portion of whose surfaces are coated with a carbon material. In a sphericity area cumulative distribution curve for particles having sizes?1 ?m obtained from a cross-section of the positive electrode film layer in the thickness direction, a sphericity median LR1A50 is between 0.71 and 0.85. The present application further provides a battery apparatus, an electrical apparatus, a method for preparing the positive electrode active material, and a method for preparing the positive electrode plate.

Abstract: A light-emitting diode (LED) panel is provided. The LED panel features a second conductive layer that covers the first conductive layer in an area corresponding to trenches to increase a thickness of the first conductive layer in the area of the trenches.

Abstract: A lithium-ion secondary battery, a battery apparatus, a power-consuming apparatus, and methods for preparing a positive electrode active material and a positive electrode plate are provided. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate and an electrolyte. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side thereof. The positive electrode film layer includes a positive electrode active material comprising lithium-containing transition metal phosphate particles having at least partially carbon-coated surfaces. In a cumulative distribution curve of a graphitization degree C. value measured by laser confocal Raman spectroscopy in a mapping mode, a median value C50 is from 0.95 to 1.20, and a concentration (C90-C10)/C50 is from 0.01 to 0.04. The graphitization degree C.

Abstract: This application relates to a high and low dual-frequency composite loudspeaker unit and an audio device. The loudspeaker unit includes a low-frequency loudspeaker component and a high-frequency loudspeaker component. An independent high-frequency loudspeaker component is integrated on the central axis of the low-frequency loudspeaker component, and the high-frequency loudspeaker component is connected with the crossover circuit board through independent lead wires, and works together with the low-frequency loudspeaker component through the crossover circuit board.

Abstract: A display panel including a drive substrate, a first LED structure, a second LED structure and a third LED structure that are disposed to be sequentially stacked and at least one electrical switching member. The at least one electrical switching member is disposed on a side of the third LED structure adjacent to the drive substrate. One of the electrical switching members is correspondingly connected to and disposed on one of the conductive pads. At least one of the first independent electrode, the second independent electrode, and the third independent electrode is connected to one of the electrical switching members through a through-hole.

Abstract: Described herein are systems, methods, and computer-readable medium for magnetic resonance (MR) based thermometry. A method for magnetic resonance based thermometry includes: acquiring, by a variable flip-angle T1 mapping sequence, MR data in an area of interest of a subject that is heated by the application of focused ultrasound (FUS) to the brain of the subject, where the MR data includes T1 values over time, and where the acquisition of the MR data includes applying an accelerated three-dimensional ultra-short spiral acquisition sequence with a nonselective excitation pulse; tracking changes in proton resonance frequency and determining, based at least in part on a mathematical relationship established by T1 mapping thermometry, a temperature change in the area of interest over time, and where the temperature change is caused at least in part by a change in the applied FUS.

Abstract: A waveguide probe structure, a calibration device for an antenna array and a calibration method for an antenna array are provided. The waveguide probe structure includes a waveguide coaxial converter, a tapered waveguide and a first straight waveguide. The waveguide coaxial converter is configured to transmit and receive two orthogonal linearly-polarized signals; the tapered waveguide includes a first waveguide cavity including a first waveguide port and a second waveguide port, the first waveguide port is connected to the waveguide coaxial converter, the second waveguide port is connected to the first straight waveguide, and a size of a cross section of the first waveguide cavity increases monotonically in a direction from the first waveguide port to the second waveguide port; the first straight waveguide includes a second waveguide cavity, a size of a cross section of the second waveguide cavity is equal to a size of the second waveguide port.

Abstract: The present disclosure relates to a lithium-ion secondary battery, a battery apparatus, an electrical apparatus, and preparation methods for a positive electrode active material and a positive electrode plate. The battery includes a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate comprises a current collector and a film layer disposed on at least one side of the collector. The film layer comprises a positive electrode active material including lithium-containing transition metal phosphate particles, at least part of the surfaces of which are coated with a carbon material. In a cross-section along the electrode plate thickness direction, the DA90 of the particles ranges from 1400 nm to 2100 nm, and the particle size concentration ratio (DA90?DA10)/DA50 ranges from 1.855 to 2.375, wherein DA90, DA50, and DA10 respectively denote the particle sizes corresponding to 90%, 50%, and 10% of the area cumulative distribution.

Abstract: The present application provides an adjustable radio frequency unit, a filter, and an electronic device. The adjustable radio frequency unit includes a first tunable dielectric layer and a second tunable dielectric layer; a first conductive layer located between the first tunable dielectric layer and the second tunable dielectric layer; a second conductive layer located on the side, away from the first conductive layer, of the first tunable dielectric layer; and a third conductive layer located on the side, away from the first conductive layer, of the second tunable dielectric layer; wherein orthographic projections of the first conductive layer, the second conductive layer and the third conductive layer on the first tunable dielectric layer at least partially overlap with one another. The adjustable radio frequency unit has the characteristic of passband adjustability and with high adjustment precision, good controllability, wide working frequency range, and low loss and cost.

Abstract: The present application relates to the technical field of power system fault detection, discloses a high-speed location method for high impedance fault in distribution network based on directional frequency scanning. The high-speed location method includes, intercepting a zero-sequence current signal I0j collected by each of monitoring points of the distribution network and a bus zero-sequence voltage signal U0 of the distribution network, determining the fault occurrence time tf, extracting a first natural mode function to directly reconstruct a original fault signal, projecting a first natural mode function signal to the reference orthogonal vector group respectively, distinguishing the upstream and downstream of a fault point by a clustering algorithm.

Abstract: Method of at least partially inhibiting the function of Klebsiella pneumoniae carbapenemase-2 (KPC-2) or a variant thereof, the method including contacting the KPC-2 with a benzoxaborole selected from the group consisting of 5-chloro-1,3-dihydro-1-hydroxy-2,1-benzoxaborole, 5-fluoro-1,3-dihydro-1-hydroxy-2,1-benzoxaborole, and mixtures thereof useful in the treatment of beta-lactam antibiotic resistant bacteria infections in a subject.

Abstract: Methods of treating a hypervirulent Klebsiella pneumoniae (hvKp) infection in a subject in need thereof, the method involving co-administering a therapeutically effective amount of an antibiotic and a non-steroidal anti-inflammatory drug or a signal transducer and activator of transcription 1 inhibitor to the subject.

Abstract: An ultraviolet differential optical absorption spectroscopy (UV-DOAS) and open path (OP) based long-distance detection device for a chlorine gas, and a method are provided.

Abstract: A model processing method includes: obtaining a sample data set of a sample subject including a sample image, a sample reference image, and a sample portrait; inputting the sample data set into a neural network model for image processing to obtain a predicted portrait, where the image processing includes: performing feature extraction on the sample image and the sample reference image to obtain facial and hairstyle features of the sample subject; generating a reference portrait of the sample subject based on the facial and hairstyle features; determining a sample portrait feature based on the reference portrait and the facial and hairstyle features; and generating the predicted portrait based on the sample portrait feature; and adjusting parameters of the neural network model based on the sample image, the predicted portrait, the sample portrait and the reference portrait.

Abstract: A clean storage system for a home ventilator includes a body with a ventilator placement region, a storage device, an air purification system, and a display control component, where air outlets are at least formed in the ventilator placement region or a portion of the body proximal to the ventilator placement region; the storage device is provided with a storage chamber, exhaust ports, and a storage opening capable of being opened or closed, and the storage chamber communicates with an air supply device; the air purification system is provided with a fan, an air purification device, the air outlets, and air inlets; and an airflow channel in an air outflow direction of the air purification device in the body is a clean air region, and the air outlets communicate with the airflow channel.

Abstract: The present disclosure discloses a home ventilator. The home ventilator includes a body with a respiratory function assembly, a storage device, an air purification system, and a display control component, where the storage device is provided with a storage chamber, exhaust ports, and a storage opening capable of being opened or closed, and the storage chamber communicates with an air supply device; the air purification system is provided with a fan, an air purification device, and air outlets; and external air of the body is introduced from air inlets, an airflow channel in an air outflow direction of the air purification device in the body is a clean air region, and the respiratory function assembly and the air supply device respectively draw in clean air.

Abstract: Provided is use of a compound represented by Formula (I), or a stereoisomer, tautomer, solvate or pharmaceutically acceptable salt of the compound represented by Formula (I) in the manufacture of a medicament for treating and/or preventing an immune system disease.

Abstract: Disclosed are a method and system for verifying a low-frequency oscillation damping control effect of a governor power system stabilizer (GPSS), relating to the technical field of power systems. The method includes: selecting a wiring working condition for a fault-free disconnection test, and constructing a unit test working condition; performing the fault-free disconnection test on an outgoing line of a power plant, and collecting an electromagnetic power fluctuation recording curve; and comparing low-frequency oscillation damping effects under different GPSS settings, evaluating the effects, and performing a cyclic test. A success rate of the test is increased, safety of the test is improved, and the overall stability and anti-oscillation capacity of the system are improved in the disclosure.