Abstract: The present application discloses a winding method and a winding system, and relates to the technical field of battery fabrication. The winding method includes: obtaining a first parameter and a second parameter of each electrode assembly on a winding needle in real time, the first parameter being any one of a number of winding layers, a sheet length and a winding roll diameter, and the second parameter being one or both of the remaining two of the number of winding layers, the sheet length and the winding roll diameter; comparing the second parameters respectively with corresponding preset parameter ranges, the preset parameter ranges being the ranges of the second parameters corresponding to the first parameters of preset standard models corresponding to the electrode assemblies; and adjusting, in response to the second parameter exceeding the corresponding preset parameter range, sheets to be wound of the corresponding electrode assembly.

Abstract: A method for preparing an antibacterial and fresh-keeping fruit-packaging material through three-dimensional (3D) printing includes the following steps: dissolving gum arabic and pullulan separately in deionized water to obtain a gum arabic solution and a pullulan solution; subjecting a probiotic to cultivation, centrifugation, and resuspension to obtain a bacterial suspension; mixing the bacterial suspension, the gum arabic solution, and the pullulan solution to obtain a core layer solution; mixing polyvinyl chloride, a modifier, and a plasticizer to obtain a shell layer solution; injecting the shell layer solution and the core layer solution into two syringes, respectively; conducting coaxial 3D printing to finally obtain a coaxial 3D printing product with a core-shell structure; and conducting uniaxial 3D printing with the shell layer solution alone to form an outer layer on the coaxial 3D printing product to obtain the antibacterial and fresh-keeping fruit-packaging material with inner and outer layers.

Abstract: The present invention belongs to the field of organophosphorus pesticide (OP) detection, and relates to a method for detecting an OP by a microfluidic chip based on a fluorescent sensing film. A porous fluorescent sensing film and the microfluidic chip are first constructed. The fluorescent sensing film is fabricated through layer-by-layer self-assembly of a platinum nanoparticle@oxalate-metal-organic framework (MOF) composite and a porous two-dimensional (2D) nanosheet, and has the functions of specifically detecting OPs and blocking macromolecular interferents. The microfluidic chip includes a sample channel, injection channels, reaction tanks, microfluidic channels, a detection tank, and an optical fiber channel, such that sample pretreatment and detection processes are integrated in the chip.

Abstract: A computer-implemented method of providing one or more content item recommendations for a user of a content distribution system, comprising: determining if a user search using a title of content finds the title of content in one or more content sources available to the user; identifying, in response to the title of content not being found in the one or more content sources, content in a content library by determining if the title of content is in the content library, wherein the content library contains metadata concerning items of content in the content library, the metadata representing at least some properties of the items of content; using, in response to the title of content being determined to be in the content library, the metadata of the identified content in the content library and metadata concerning content available from the one or more content sources available to the user to generate at least one content item recommendation for the user, wherein the at least one content item recommendation is fo

Abstract: Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, which is capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, including following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

Abstract: A CT energy extraction device is provided. A first accommodation cavity is provided in a first housing, and a second accommodation cavity is provided in a second housing. The first housing can be connected and joined with the second housing to form a ring shape, which is used to be placed on outside of a high-voltage line. A first iron core is disposed in the first accommodation cavity, and an energy-extraction coil is wound around the first iron core. A cable outlet is provided on the first housing, and the energy-extraction coil has pins extending from the cable outlet. A second iron core is disposed in the second accommodation cavity. When the first housing and the second housing are connected and joined, the first and second iron cores are joined to form a closed ring structure. An inflating assembly is provided on the first housing and/or the second housing.

Abstract: An image display method, an image display apparatus, a device and a storage medium.

Abstract: An apparatus for non-contact current and voltage composite measurement includes: a current signal detection device, a voltage signal detection device, a zero-crossing detection circuit, and a control unit. The current signal detection device generates a current-induced electromotive force based on current flowing on the transmission line to be measured when there is current-voltage passing through the transmission line to be measured; the voltage signal detection device generates a voltage-induced electromotive force based on voltage flowing on the transmission line to be measured when there is current-voltage passing through the transmission line to be measured. The zero-crossing detection circuit performs zero-crossing detection on the current-induced electromotive force and the voltage-induced electromotive force to determine the phase difference between them.

Abstract: A conveying mechanism for packaging machinery includes a rotation base, a station assembly, and an expansion-retraction driving mechanism. The station assembly is connected to the rotation base and rotates along with the rotation base. The station assembly includes multiple station units for arranging a packaging container, and the expansion-retraction driving mechanism drives the at least two station units to move, to make the station assembly switch between an expanded posture and a retracted posture. With the conveying mechanism for the packaging machinery and the packaging machinery according to the present application, multiple packaging containers can be processed for packaging production at the same time, thereby effectively enhancing the efficiency of the packaging process, reducing a radius of gyration by switching the posture of the station assembly during circulation of the station assembly, improving structural compactness, reducing the occupied volume.

Abstract: This application proposes a magnetic coupling coil optimization method. The method comprises: calculating an equivalent magnetic permeability of a magnetic coupling coil based on an air gap length of the magnetic coupling coil; calculating an effective cross-sectional area of the magnetic coupling coil based on the equivalent magnetic permeability and the power of the magnetic coupling coil; calculating a number of turns of the secondary winding of the magnetic coupling coil based on the effective cross-sectional area and the equivalent magnetic permeability; optimizing the magnetic coupling coil based on the number of turns of the secondary winding. The present application can reasonably configure the parameters of the magnetic coupling coil, effectively acquire energy from the power grid to provide stable power for detection or communication equipment in the power grid, and make the magnetic coupling coil more reliable while meeting the power demand.

Abstract: The present disclosure generally relates to a battery pack for an electric vehicle. In some implementation examples, the battery pack has an array of battery cells and a battery pack enclosure for holding the array of battery cells. The battery pack enclosure has a top surface above the array of battery cells. An impact attenuation layer can be integrated into at least a portion of the top surface of the battery pack enclosure. The impact attenuation layer has a first sub-layer and a second sub-layer. The first sub-layer has a first puncture resistance attribute and a first impact resistance attribute and the second sub-layer has a second puncture resistance attribute and a second impact resistance attribute. The first puncture resistance attribute is higher than the second, puncture resistance attribute and the first impact resistance attribute is lower than the second impact resistance attribute.

Abstract: Provided are an encoding method and apparatus for an RAID6 disk array, a decoding method and apparatus for an RAID6 disk array, and a medium. The encoding method comprises: dividing all disks in a RAID6 disk array into two groups to obtain a first disk group and a second disk group; pairing all stripes of the RAID6 disk array to obtain several stripe pairs; and calculating two parity codes of each strip in the several stripe pairs according to a first rule and a second rule.

Abstract: The present disclosure belongs to the technical fields of nanoscience and fluorescence sensing, and specifically relates to a preparation method of a paper-based sensor for detecting an ammonia gas, and a use of the paper-based sensor. In the present disclosure, Zn(PA)(BPE) is first prepared, and a porous structure on a surface of the Zn(PA)(BPE) is used to adsorb an ammonia gas to improve a reaction sensitivity of the ammonia gas; then a Zn(PA)@CNQD ratiometric fluorescent substance is prepared from Zn(PA)(BPE) and CNQD through embedding, and finally dissolved in ultrapure water (UPW) to obtain a solution; and the solution is added dropwise on a filter paper, and the filter paper is purged with nitrogen, such that the solution is loaded on the filter paper to obtain a ratiometric fluorescent paper-based sensor.

Abstract: A display panel and a display device are provided. A light-controlling component configured to adjust a signal transmitter is disposed on a light-emitting surface of the signal transmitter of the display panel, thereby allowing modulated light, emitted from the signal transmitter disposed at a predetermined included angle with respect to a bottom surface of a cover plate, to be totally reflected between a top surface and the bottom surface of the cover plate. Total reflection is interrupted at a position where a user's finger touches. Light is received and recognized by a plurality of light sensors on a sensor array after entering the display panel, thereby realizing under-display fingerprint recognition in a large area.

Abstract: Disclosed are a data migration method, system and device for a storage server, and a non-transitory readable storage medium. The method includes: according to storage information of a storage server, determining the number n of strips to be migrated; selecting n stripes to be migrated from among c full stripes according to a preset migration rule, and selecting, from the n stripes to be migrated, data blocks to be migrated and migrating the data blocks to the newly inserted disks, so that after the migration is completed, the difference in stripe usage between any two disks in the storage server does not exceed 1; and determining data content of check data blocks of the strips so as to complete data migration of the storage server, and determining data content of check data blocks of the c-n strips by means of incremental update of an erasure code.

Abstract: The present invention relates to the use of MtNAC33 gene and a protein encoded thereby in the cultivation of high-biomass and drought-tolerant alfalfa, belonging to the technical field of plant genetic engineering. The plant protein encoded by MtNAC33 gene has the amino acid sequence set forth in SEQ ID NO: 2, and MtNAC33 gene has the nucleotide sequence set forth in SEQ ID NO: 1. In the present invention, the drought tolerance of Arabidopsis thaliana and alfalfa can be significantly improved by regulating the expression level of MtNAC33 in alfalfa. The phenotypes of delayed flowering, increased leaf-to-stem ratio and more biomass in alfalfa were also developed, which has an important effect for genetic improvement of stress resistance and biomass of forage grass and other crops.

Abstract: The electronic device includes a composite antenna including a slot antenna and a wire antenna. A first strip-shaped conductor of the slot antenna includes a first ground part, a second ground part, and a feeding part. The first ground part and the second ground part are respectively two ends of the first strip-shaped conductor. The feeding part is located between the first ground part and the second ground part. A second strip-shaped conductor of the wire antenna includes a first end and a second end. The first end of the second strip-shaped conductor is electrically connected to the first ground part. The second end of the second strip-shaped conductor is an open end.

Abstract: A measurement circuit of thin-film temperature sensor comprises: out-phase input end and output end of first operational amplifier are connected to first end of thin-film resistor; first end of first resistor is connected to output end of first operational amplifier, second end of first resistor is connected to in-phase input end of first operational amplifier; second end of first resistor is grounded via second resistor; output end of second operational amplifier is connected to first end of potentiometer; second end of the potentiometer is connected to the constant current source and in-phase input end of second operational amplifier respectively; first end of third resistor is connected to output end of second operational amplifier, second end of third resistor is connected to out-phase input end of second operational amplifier; second end of third resistor is grounded via fourth resistor; voltage value of second end of potentiometer is output signal.

Abstract: A chip type coil-based fluxgate current sensor, comprising: a magnetism gathering iron core, a chip type coil, an integral filtering module, a signal driving module, a voltage acquisition module, and a signal amplification module which are connected in sequence. The chip type coil comprises a first high-resistance silicon wafer and a second high-resistance silicon wafer which are bonded with each other; a built-in cavity is formed between involution surfaces of first high-resistance silicon wafer and second high-resistance silicon wafer, and multiple solenoid cavities filled with coil materials are provided around the periphery of the cavity; a cavity opening is formed at one end after involution of first high-resistance silicon wafer and second high-resistance silicon wafer. The magnetism gathering iron core is inserted into the cavity of the chip type coil by means of the cavity opening. The present current sensor is small in size and stable in signal.

Abstract: The present invention relates to the use of MtNAC33 gene and a protein encoded thereby in the cultivation of high-biomass and drought-tolerant alfalfa, belonging to the technical field of plant genetic engineering. The plant protein encoded by MtNAC33 gene has the amino acid sequence set forth in SEQ ID NO: 2, and MtNAC33 gene has the nucleotide sequence set forth in SEQ ID NO: 1. In the present invention, the drought tolerance of Arabidopsis thaliana and alfalfa can be significantly improved by regulating the expression level of MtNAC33 in alfalfa. The phenotypes of delayed flowering, increased leaf-to-stem ratio and more biomass in alfalfa were also developed, which has an important effect for genetic improvement of stress resistance and biomass of forage grass and other crops.