Abstract: A battery cell, a battery, and an electric device. The battery cell has a capacity of C and comprises a casing, and at least a partial region of the casing has a tensile strength of Rm at a temperature of 25° C., wherein Rm and C satisfy: 250 MPa?Rm?2000 MPa and 25 Ah?C?550 Ah.

Abstract: A vent valve, a battery cell, a battery, and an electric device. The vent valve includes: a metal sheet, the metal sheet at least including a first through hole; a connecting member, the connecting member including at least one second through hole, where the connecting member is arranged on the metal sheet, and the first through hole is communicated with the second through hole; and a breathable membrane, the breathable membrane being arranged on the connecting member and covering the second through hole. By providing the connecting member, deformation of the breathable membrane during processing can be reduced, further preventing the deterioration of gas permeability caused by the deformation, thereby enhancing the structural stability of the vent valve, prolonging the service life of the vent valve, while also helping improve the sealing performance of the vent valve and broadening the selection range of the breathable membrane materials.

Abstract: Disclosed in the embodiments of the present application are a battery cell, a battery and an electric device. The battery cell comprises: an electrode assembly, wherein the electrode assembly comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode active material capable of realizing reversible de-intercalation and intercalation of metal ions, and the positive electrode active material comprises a compound containing nickel; and a case, which is used for accommodating the electrode assembly, wherein the melting point of at least some regions of the case is p, and p satisfies: 1200° C.?p?2000° C. According to the battery cell, the battery and the electric device in the embodiments of the present application, the reliability of the battery cell can be improved.

Abstract: A loudspeaker and an electronic system are disclosed. The loudspeaker includes a base, a loudspeaker body and a first driver. The loudspeaker body is disposed on the base and defines an up and down direction of the loudspeaker, and the loudspeaker body is rotatable around the up and down direction with respect to the base. The first driver can drive the loudspeaker body to rotate with respect to the base.

Abstract: A roughened-film production control method and system. The method comprises: S1, adjusting a melting temperature such that same is within a range from 230° C. to 240° C., and adjusting the temperature of sheet casting such that same is within a range from 80° C. to 90° C.; S2, measuring the light transmittance of a longitudinally stretched thin film; S3, determining whether the light transmittance of the thin film is within a preset range; S4, if the light transmittance of the thin film is within the preset range, keeping the current melting temperature and the temperature of the sheet casting unchanged; and S5, if the light transmittance of the thin film is not within the preset range, adjusting, on the basis of the magnitude of the light transmittance of the thin film, the melting temperature and the temperature of the sheet casting according to a preset step length, and returning back to step S2.

Abstract: A cleaning device includes a main body portion, a dust cup, and a dust scraping assembly. The main body portion includes a first filter. The dust cup includes a cup body and a cup cover. The cup body is connected to the main body portion and covers an outer side of the first filter. At least a part of the dust scraping assembly is disposed around the outer side of the first filter, and is configured to move in a reciprocating manner along an axial direction of the first filter, so as to scrape off dust from the first filter.

Abstract: The present disclosure discloses an emergency rescue autonomous driving vehicle collision risk prediction method and a system based on HM-TRW and HAGENN structure search, abstracts the relationship between the emergency rescue vehicle and the surrounding moving objects into a dynamic heterogeneous diagram, captures the importance and dynamic of each surrounding moving object and various interactive relations by using HM-TRW, and merges with the original characteristics of each surrounding moving object. Then input HAGENN to predict the collision risk, and apply the dynamic heterogeneous graph embedding method to the hierarchical attention neural network to further learn the heterogeneous characteristics and dynamic changes of the surrounding moving objects.

Abstract: The invention relates to an organic peroxide formulation comprising: —at least one organic peroxide having a one hour half-life temperature of from 90° C. to 130° C., and —at least one drying oil, wherein the weight ratio of the drying oil to the organic peroxide is lower than or equal to 0.60. The invention also relates to a composition comprising at least one polymer and such an organic peroxide formulation, to preparation methods thereof, and to a method for manufacturing an article using such a composition.

Abstract: A system, method, and photonic chip for an optical circulator are described. The system includes a first polarization splitter, a first optical circuit, and a first controller. The first polarization splitter receives, at a first port of the first polarization splitter, a first optical signal. The first optical circuit is optically coupled to the first polarization splitter. The first optical circuit includes a first plurality of phase shifters. The first optical circuit receives, at a first port of the first optical circuit, a second optical signal. The first controller adjusts the first plurality of phase shifters such that the first optical circuit outputs the first optical signal at a second port of the first optical circuit and such that the first polarization splitter outputs the second optical signal at the first port of the first polarization splitter.

Abstract: The present disclosure discloses a method for target assignment and route planning for multi-agent unmanned surface vehicles (USVs). Task information is transmitted to a task allocator, which identifies unassigned targets and available USVs. Based on a comprehensive cost function considering navigation distance and turning penalties between targets and USVs, a target is assigned to each USV. A path planner then generates a smooth waypoint sequence for each assigned USV and target pair, serving as the navigation path. During navigation, a navigation controller constructs a velocity optimization model according to cooperative collision avoidance and maritime boundary constraints, and controls the USVs in real-time to navigate along the waypoint sequences.

Abstract: An organic electroluminescent device and a display device are provided. The organic electroluminescent device comprises a substrate, an anode, an organic light-emitting layer and a cathode disposed in sequence, wherein the organic light-emitting layer comprises a host material, a guest light-emitting material and an exciton utilizing agent, and the host material comprises a hole-type host material and an electron-type host material, and the minimum values of bond dissociation energies of the electron-type host material and the exciton utilizing agent in an anionic state, an electrically neutral state and a cationic state are each independently ?2.6 eV, and the HOMO energy level of the guest light-emitting material is H1, the HOMO energy level of the exciton utilizing agent is H2, and H1 and H2 satisfy the relationship: 0 eV?H2?H1?0.5 eV. The present application can improve luminous efficiency and lifetime of OLED device.

Abstract: The embodiments of the present application relate to the technical field of electronic devices. Disclosed are a method and apparatus for switching an operating system, and an electronic device and a storage medium. The method is applied to an electronic device, which electronic device can run a first operating system and a second operating system. The method comprises: when a display apparatus of an electronic device is in a screen-off state for a first duration, switching the electronic device from a first operating system to a second operating system; and if the display apparatus is switched from the screen-off state to a screen-on state, continuing to run the second operating system. By means of implementing the embodiments of the present application, an operating system can be automatically switched when a display apparatus is in a screen-off state, thereby improving the degree of intelligence of a device.

Abstract: A screen display method and an electronic device are provided. The screen display method is performed by an electronic device capable of running a first system and a second system. The electronic device at least includes a display screen, and the method includes: during the operation of the first system, controlling, by the first system, the display screen to enter an always on display (AOD) mode, in a case where a first AOD condition is met in the electronic device; and transmitting, by the first system, an AOD switching instruction to the second system, in a case where a second AOD condition is met in the electronic device. The AOD switching instruction is configured to indicate the second system to control the display screen to enter the AOD mode.

Abstract: Disclosed is an adiabatic optical coupler. The adiabatic optical coupler includes a tapered input region which includes a first waveguide core and a second waveguide core. The first and second waveguide cores are separated at the tapered input region. The adiabatic optical coupler also includes a narrow coupling region extending from the tapered input region. In the narrow coupling region, the first and second waveguide cores are brought within close proximity and a third waveguide core is positioned between the first and second waveguide cores. The third waveguide core defines a longitudinal axis. The adiabatic optical coupler also includes a flared output region extending from the narrow coupling region. In the flared output region, the first, second, and third waveguide cores are separated.

Abstract: A shell, a battery cell, a battery, and an electric device. At least partial area of a shell 211 has a tensile strength Rm at a temperature of 25° C. At least part of the shell 211 comprises first shell walls 2112, the average thickness of the first shell walls 2112 is T, Rm and T satisfy the following: 250 MPa?Rm?2000 MPa, 0.05 mm?T?0.5 mm, and 60 mm·MPa?T×Rm?500 mm·MPa.

Abstract: A spherical carrier for olefin polymerization catalysts has at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier has a relatively good particle morphology, and substantially no abnormally morphological particles will appear. A method for preparing the spherical carrier can be used to prepare a carrier having a small particle size and greatly expands the particle size range of the preparable carrier. When the catalyst prepared by using the carrier is used for olefin polymerization, polymerization activity is good, substantially no abnormally morphological material is present, and hydrogen response is good.

Abstract: A tunable laser comprising at least two gain chips configured to generate light and a wavelength selection circuit. The wavelength selection circuit comprising a first waveguide coupled to a first gain chip of the at least two gain chips, a second waveguide coupled to a second gain chip of the at least two gain chips, a first wavelength selective photonic ring resonator optically coupled to the first waveguide, a second wavelength selective photonic ring resonator optically coupled to second waveguide, a third waveguide optically coupled to the first wavelength selective photonic ring resonator and the second wavelength selective photonic ring resonator; and a control circuit. The control circuit is configured to apply a first current to the first gain chip to bias the first gain chip, tune the first wavelength selective photonic ring resonator to a target wavelength, and tune the second wavelength selective ring resonator off-resonance.

Abstract: In one embodiment, the disclosure relates to an electro-optical device that includes an optical gain chip that includes; a gain material, the gain material having a gain region, the optical gain chip that includes: N gain chip waveguides; a photonic integrated circuit (PIC) that includes a plurality of layers and a plurality of components, wherein the PIC defines M sections; N external laser cavities; P PIC waveguides; and B distributed Bragg reflector (DBR) rings, wherein each of the N external laser cavities is defined by one of the P PIC waveguides and one of the B DBR rings; and N laser cavities, wherein each laser cavity of the N laser cavities comprises one of the N external laser cavities and one of the N gain chip waveguides.

Abstract: In part, in one embodiment the disclosure relates to a laser that includes a laser cavity; an optical gain chip that includes a gain material, the gain material having a gain region, the optical gain chip includes a first waveguide, the first waveguide defines a first section of the laser cavity; an external laser cavity includes a second waveguide, the second waveguide is optically coupled to the first waveguide, the second waveguide defines a second section of the laser cavity; and a DBR ring optically coupled to the second waveguide, the DBR ring includes a loop waveguide optically coupled to the second waveguide and one or more DBR disposed along one or more sections of the loop waveguide, the laser cavity includes the first section of the laser cavity and the external laser cavity; and a PIC that includes the second waveguide and the DBR ring.