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: 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: 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: 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.

Abstract: Equipment for self-positioning handling of aluminum profiles for rail vehicle, including a handling and lifting mechanism, a steel beam fixed on and being driven to lift by the mechanism, 2-DOF spatial mechanisms fixed on the steel beam and mechanical clamping jaws fixed on a clamping jaw connecting seat; the 2-DOF spatial mechanisms includes a cylinder supporting seat, four connecting members on an outer ring of the cylinder supporting seat hinged respectively to four first connecting rods; wherein, two of the first rods are hinged to first ends of two ball joint connecting rods of which second ends are hinged to the clamping jaw connecting seat; the other two first rods are hinged to first ends of two second connecting rods of which second ends are hinged to the clamping jaw connecting seat; a piston rod of a cylinder center of the cylinder supporting seat driving the clamping jaw connecting seat.

Abstract: A polymer composition comprising a liquid crystalline polymer that contains repeating units derived from naphthenic hydroxycarboxylic and/or dicarboxylic acids in an amount of about 50 mol. % or more is provided. The polymer composition exhibits a dielectric constant of about 4 or less and a dissipation factor of about 0.05 or less at a frequency of 10 GHz.

Abstract: A lighting apparatus includes a first LED module, a second LED module, a rectifier, a power circuit, a time detector, a wall switch circuit and a controller. The first LED module has a first light parameter. The second LED module has a second light parameter. The first light parameter is different from the second light parameter. The power circuit converts the DC power to a first driving current and a second driving current respectively supplied to the first LED module and the second LED module. The time detector detects a voltage time variation of the DC power. The controller is coupled to the wall switch circuit and the time detector for determining whether to adjust a current ratio between the first driving current and the second driving current according both the voltage time variation and the control signal.

Abstract: The present application provides a display panel and a manufacturing method thereof, the manufacturing method comprises: providing a first substrate, wherein a side of the first substrate is provided with a plurality of Micro-LED chips that are spaced apart from each other; providing a second substrate, wherein a surface on a side of the second substrate has a plurality of conductive layer parts; forming an isolation layer on the second substrate, wherein the isolation layer has a plurality of opening groups, each of the opening groups comprises a first opening and a second opening to expose a surface of one of the conductive layer parts, wherein a width of the first opening is greater than that of a P-type electrode, and a width of the second opening is greater than that of a N-type electrode; forming a first bonding layer in the first opening and forming a second bonding layer in the second opening; while supporting the chip body by the isolation layer, bonding the P-type electrode with the first bonding la