Abstract: The embodiments of the disclosure are applicable to the technical field of blockchain and provide a consensus trusted cluster changing method, a computer device and a computer-readable storage medium. The method is applicable to a blockchain and includes: determining a current epoch of a newly added validator node of the consensus trusted cluster in the blockchain and a target epoch of the consensus trusted cluster; requesting target status information and proof of target cluster change from a target validator node in the target epoch; verifying the target status information according to the proof of target cluster change; and updating, in case where the target status information has been verified, status information of the newly added validator node according to the target status information to complete change of the consensus trusted cluster. Through the above method, a trusted synchronization target status may be determined.

Abstract: An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

Abstract: The present disclosure discloses a control device, which comprises: a circuit board; a heat dissipation cover comprising a heat dissipation cover plate and a plurality of heat dissipation fins arranged on the heat dissipation cover plate, wherein the heat dissipation cover plate covers the circuit board, and a groove is formed between the plurality of heat dissipation fins; a thermally conductive strip disposed between the circuit board and the heat dissipation cover plate; and a fan arranged in the groove. The heat dissipation cover disclosed herein covers the circuit board as a holistic upper cover, the heat of the circuit board is conducted to the heat dissipation cover through the thermally conductive strip, and the fan in the through groove generate an airflow to dissipate heat, thereby realizing sealing, dustproof and heat dissipation of the circuit board simultaneously.

Abstract: The present disclosure discloses a control device, which comprises: a circuit board; a heat dissipation cover comprising a heat dissipation cover plate and a plurality of heat dissipation fins arranged on the heat dissipation cover plate, wherein the heat dissipation cover plate covers the circuit board, and a groove is formed between the plurality of heat dissipation fins; a thermally conductive strip disposed between the circuit board and the heat dissipation cover plate; and a fan arranged in the groove. The heat dissipation cover disclosed herein covers the circuit board as a holistic upper cover, the heat of the circuit board is conducted to the heat dissipation cover through the thermally conductive strip, and the fan in the through groove generate an airflow to dissipate heat, thereby realizing sealing, dustproof and heat dissipation of the circuit board simultaneously.

Abstract: An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

Abstract: An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

Abstract: Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and/or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.

Abstract: Alkaline electrochemical cells are provided, containing cathodes with a nickel compound active material, wherein active material particles are coated with at least one of a number of materials so as to improve the shelf life of the electrochemical cell. Methods of preparing such cathodes and electrochemical cells are also provided.

Abstract: An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

Abstract: An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

Abstract: Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and/or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.

Abstract: The present disclosure discloses a control device, which comprises: a circuit board; a heat dissipation cover comprising a heat dissipation cover plate and a plurality of heat dissipation fins arranged on the heat dissipation cover plate, wherein the heat dissipation cover plate covers the circuit board, and a groove is formed between the plurality of heat dissipation fins; a thermally conductive strip disposed between the circuit board and the heat dissipation cover plate; and a fan arranged in the groove. The heat dissipation cover disclosed herein covers the circuit board as a holistic upper cover, the heat of the circuit board is conducted to the heat dissipation cover through the thermally conductive strip, and the fan in the through groove generate an airflow to dissipate heat, thereby realizing sealing, dustproof and heat dissipation of the circuit board simultaneously.

Abstract: Various embodiments are directed to an electrochemical cell having a non-homogeneous anode. The electrochemical cell includes a container, a cathode forming a hollow cylinder within the container, an anode positioned within the hollow cylinder of the cathode, and a separator between the cathode and the anode. The anode defines a characteristic gradient between an interior portion of the anode and the outermost surface of the anode adjacent the separator. The characteristic gradient may be defined as, for example, an average active material particle size within the anode that changes as a function of the radial location within the anode or a surfactant concentration gradient that changes as a function of the radial location within the anode.

Abstract: A method for directly preparing a foamed polylactic acid (PLA) product from a PLA melt includes PLA melt preparation, feeding, and two-stage extrusion. In the two-stage extrusion, a pressure at an outlet of a first-stage twin-screw extruder is 15 MPa to 17 MPa, a PLA melt is fed at a rate of 250 kg/h, a foaming additive is fed at a rate of 7.5 kg/h to 10 kg/h, and a foaming gas is fed at a rate of 2.8 L/h to 7.5 L/h. The method can ensure both foamability and quality of a material and reduce more than ? of energy consumption; and an obtained product has an adjustable foaming rate of 3 to 25, a crystallinity of 40.3% to 48.5%, a tensile strength of 8.7 MPa to 19.6 MPa, and an apparent density of 0.05 g/cm3 to 0.4 g/cm3.

Abstract: A preparation method of a high-rate foamed polylactic acid (PLA) sheet includes first-stage extrusion, second-stage extrusion, and foamed sheet extrusion. The method requires the following raw materials in parts by mass: 88 to 94 parts of PLA, 1 to 2 parts of a nucleating agent, 2 to 5 parts of a foaming agent, and 2 to 5 parts of an additive. The new method effectively solves the problems of low foaming rate, low strength, and the like in the industrial production using carbon dioxide, and a prepared PLA sheet with high foaming rate and excellent surface performance can be used in the fields of food packaging, disposable fully-degradable lunch boxes, and the like.

Abstract: A rotation detection apparatus and an electronic device containing the same are provided. The rotation detection apparatus includes: a housing, wherein the material of the housing is a magnetic shielding material; a rotating component penetrating the housing; a magnetic component located in the housing and rotating integrally with the rotating component; and a magnetic sensor located in the housing and arranged relative to the magnetic component, wherein the magnetic sensor is configured to sense a rotation angle of the magnetic component and/or sense displacement of the magnetic component in an axial direction the rotating component.

Abstract: A lithium-iron disulfide battery with improved high temperature performance is disclosed. The separator characteristics are deliberately selected to be compatible with the electrolyte at the intended temperature. Additional or alternative modifications can be made in the form of a scaffold or laminated structure. A preferred polymer for such separators is polyimide.