Abstract: Provided is a display panel including light-emitting unit package, which includes: a transparent substrate, a light shielding layer, a quantum dot layer and a light-emitting unit layer. The light shielding layer includes multiple first openings, multiple second openings, and multiple third openings. The quantum dot layer includes multiple first quantum dot units and multiple second quantum dot units. Each first quantum dot unit is correspondingly disposed in each first opening. Each second quantum dot unit is correspondingly disposed in each second opening. The light-emitting unit layer includes multiple first light-emitting units, multiple second light-emitting units, and multiple third light-emitting units with the same light-emitting color, each first light-emitting unit, each second light-emitting unit, and each third light-emitting unit are disposed corresponding to each first opening, each second opening, and each third opening, respectively.

Abstract: A light-emitting device includes a first electrode and a second electrode opposite to each other, and at least two light-emitting units in a stack between the first electrode and the second electrode. The light-emitting device further includes a charge generation unit between adjacent light-emitting units. The charge generation unit includes a first charge generation unit and a second charge generation unit sequentially arranged in a direction from the second electrode to the first electrode. The first charge generation unit is made of a material including a first host material, and a first guest material doped in the first host material, the first charge generation unit is configured to generate a first charge, and the first guest material is configured to absorb light emitted from the light-emitting units to cause the first charge generation unit to generate the first charge.

Abstract: A device and method for starting a pumped storage group, and a pumped storage system are disclosed. The device includes: an acquisition module configured to acquire starting data of the group in real time; a first determination module configured to determine a real-time speed versus time curve for the group based on the starting data; and a correction module configured to correct a starting speed of the group based on a deviation between a reference speed versus time curve cluster and the real-time speed versus time curve. The real-time speed of the group during starting is visualized through a curve fitting procedure to form the real-time speed versus time curve, the real-time speed versus time curve is compared with a favorable history operation curve, and the deviation between the real-time speed versus time curve and the favorable history operation curve is corrected to adjust the starting speed of the group.

Abstract: The present disclosure discloses a method and an apparatus for identifying an S-characteristic of a pump turbine and a control method. The method for identifying an S-characteristic of a pump turbine includes: collecting a set of state parameters of the pump turbine at a preset time interval, wherein the state parameters comprise a flow rate and a rotation speed of the pump turbine; calculating a slope of a relationship curve between the rotation speed and the flow rate of the pump turbine within a current preset time interval; and determining, according to the positivity or negativity and an absolute value of the slope, whether the pump turbine enters an S-characteristic region.

Abstract: Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

Abstract: A battery includes a plurality of battery cells and a thermal management component, where the plurality of battery cells are arranged in a stacked manner along a first direction, each of the battery cells including an electrode assembly; and the thermal management component is provided opposite to the battery cells along the first direction, where the projection of a main body portion of the electrode assembly in a plane perpendicular to the first direction and the projection of the thermal management component adjacent to the main body portion in the plane perpendicular to the first direction are at least partially overlapping.

Abstract: A battery includes a battery cell, a functional part and an insulating layer. The battery cell is provided with a pressure-relieving mechanism. The functional part is connected to the battery cell and provided with an avoidance structure, which is configured to avoid materials released by the battery cell through the pressure-relieving mechanism. At least a portion of the insulating layer is arranged within a region of the functional part corresponding to the avoidance structure.

Abstract: Embodiments of the present application provides a battery and an electrical device. The battery includes: a box including an electrical chamber; a battery cell accommodated in the electrical chamber, a pressure relief mechanism being disposed on a first wall of the battery cell; and a support component attached to the first wall, the support component being configured so that emissions of the battery cell pass through the support component to be discharged out of the electrical chamber when the pressure relief mechanism is actuated, and the support component being provided with a reinforcing structure. The technical solutions of the present application can improve safety performance of the battery.

Abstract: Increasing index search efficiency and availability in a database is provided. An index space matrix corresponding to a plurality of mini-indices of the database is built using ordered boundary values that correspond to key value ranges of each respective mini-index to increase index search efficiency by removing redundant mini-index accesses. Mini-indices of the plurality of mini-indices are consolidated asynchronously without suspending access to the mini-indices using a particular consolidation policy of a plurality of consolidation policies that corresponds to an amount of key value overlap identified between the mini-indices. Data operations corresponding to transactions are performed using the index space matrix during consolidation of the mini-indices without suspending access to the mini-indices.

Abstract: A display panel, including: a substrate; a pixel defining layer; a plurality of light-emitting devices each including a light-emitting functional layer and first and second electrodes; a supplementary electrode on a side of the second electrode away from the substrate, where an orthographic projection of the supplementary electrode on the substrate covers orthographic projections of light-emitting functional layers and/or second electrodes and/or first electrodes of the light-emitting devices of certain colors on the substrate; a supplementary electrode mutual repulsion layer on a side of the second electrode away from the substrate, where an orthographic projection of the supplementary electrode mutual repulsion layer on the substrate is complementary in pattern with the orthographic projection of the supplementary electrode on the substrate; and an encapsulation layer on a side of the supplementary electrode and the supplementary electrode mutual repulsion layer away from the substrate, and configured to en

Abstract: The present disclosure provides an image processing method and apparatus, a device, and a medium, and relates to the field of image and video processing technologies. An implementation solution includes: performing frequency domain transform on a target image and obtaining a frequency coefficient matrix of the target image, the frequency coefficient matrix including at least one non-zero frequency coefficient; determining a non-zero block in the frequency coefficient matrix based on a position of the at least one non-zero frequency coefficient; determining a corresponding transform submatrix and a corresponding transposed submatrix of the non-zero block; and determining an inverse transform result of the frequency coefficient matrix based on the transform submatrix, the non-zero block, and the transposed submatrix.

Abstract: A battery comprises: a box body assembly that is internally provided with a first cavity and a venting channel which are in communication with each other, the box body assembly being provided with a first pressure relief component; a battery cell provided in the box body assembly and located outside the first cavity, the battery cell having a second pressure relief component configured to release discharges of the battery cell into the venting channel; and a first blocking component provided in the first cavity and configured to prolong a path for the discharges to reach the first pressure relief component from the first cavity.

Abstract: A power tool includes a functional piece; an electric motor; a power supply device for supplying power to the electric motor; a parameter detection device configured to acquire multiple operating parameters of the electric motor and/or the power supply device; and a controller connected to the parameter detection device and configured to control running of the electric motor. The controller is configured to detect whether the multiple operating parameters satisfy policy switching conditions corresponding to the multiple operating parameters; in the case where any operating parameter of the multiple operating parameters satisfies a policy switching condition corresponding to the any operating parameter, control the electric motor by using a first electric motor control policy; and in the case where none of the multiple operating parameters satisfy the policy switching conditions corresponding to the multiple operating parameters, control the electric motor by using a second electric motor control policy.

Abstract: A battery cell includes: a housing having a first wall and an inner cavity; an electrode assembly arranged in the inner cavity; electrode terminals arranged on the housing and electrically connected to the electrode assembly; and a first pressure relief component arranged on the first wall, wherein the first pressure relief component has a first weakened portion, and the first weakened portion is a reduced thickness portion and is configured to be opened when a first preset condition is met within the housing.

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: The present disclosure provides a light emitting device and a display panel, which belong to the field of display technology. The light emitting device includes a first electrode, a second electrode, and at least one light emitting unit between the first electrode and the second electrode; the at least one light emitting unit each at least includes a light emitting layer; the light emitting layer includes a host material, a phosphorescent guest material and a fluorescent guest material which are doped together; a lowest triplet energy level of at least one material in the host material is greater than a lowest triplet energy level of the phosphorescent guest material.

Abstract: A battery includes: at least one battery cell, including a first pressure relief mechanism; and a box, including a second pressure relief mechanism. An exhaust passage is formed between the first pressure relief mechanism of the at least one battery cell and the second pressure relief mechanism of the box. When the first pressure relief mechanism is actuated, the exhaust passage is configured to expel emissions of the at least one battery cell from the first pressure relief mechanism to the second pressure relief mechanism. A minimum length of an exhaust path of the emissions in the exhaust passage is 0.1 m to 10 m.

Abstract: This application relates to the battery field, and in particular, to a battery cell, a battery, and an electrical device. The battery cell of this application includes a housing, an electrode assembly, and an insulation layer. A mounting capacity is created inside the housing. The electrode assembly is disposed in the mounting cavity. The insulation layer is disposed between at least a part of the electrode assembly and the housing. In the technical solution of this application, the insulation layer is disposed between at least a part of the electrode assembly and the housing. When the housing incurs an insulation failure and generates an electrical arcing or arc, the electrical arcing or arc generated by the housing will not break down the insulation layer due to insulativity of the insulation layer, thereby protecting at least a part, disposed opposite to the insulation layer, of the electrode assembly.

Abstract: A battery includes: a box including an electrical chamber; a battery cell accommodated in the electrical chamber, where a pressure relief mechanism is disposed at a first wall of the battery cell; and an attachment structure attached to the first wall, where the attachment structure is provided with an avoidance region. The avoidance region is configured to provide a deformation space for the pressure relief mechanism of at least one battery cell, and the avoidance region satisfies 0.3?S2/(n*S1)?8.5, where S1 represents a projection area of the pressure relief mechanism in a direction perpendicular to the first wall, S2 represents a projection area of the avoidance region in the direction perpendicular to the first wall, n represents the number of pressure relief mechanisms corresponding to the avoidance region, and n is a positive integer.

Abstract: Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.