Abstract: The present disclosure relates to the technical field of secondary battery, and discloses a positive electrode material and a preparation method and use therefor, a lithium-ion battery positive electrode poly piece, and a lithium-ion battery.

Abstract: A single-crystal-type multi-element positive electrode material, and a preparation method therefor and an application thereof.

Abstract: The present disclosure relates to the technical field of lithium ion batteries. Disclosed are a multi-element positive electrode material, and a preparation method therefor and the application thereof.

Abstract: A supercritical carbon dioxide state monitoring and control system based on infrared spectrum characteristic analysis. The system includes: a test section for carbon dioxide to pass through; an infrared light source emitting a detection beam to the carbon dioxide passing through the test section; an infrared spectrometer receiving and analyzing the detection beam passing through the carbon dioxide; and a pressure control module controlling pressure of the carbon dioxide at a set value. In addition, the system also includes a temperature control module capable of monitoring and adjusting temperature of the supercritical carbon dioxide. The supercritical carbon dioxide state monitoring and control system may monitor and control a state of the carbon dioxide at an inlet of an apparatus under an actual operation condition in a Brayton cycle system, which improves working performance of the apparatus in the Brayton cycle system, thereby improving overall efficiency of the Brayton cycle system.

Abstract: A positive electrode material for a lithium ion battery and a preparation method therefor, and a lithium ion battery, relating to the technical field of secondary batteries. The positive electrode material comprises a high-nickel multi-element positive electrode material, the high-nickel multi-element positive electrode material is formed by agglomerating multiple primary grains, and the primary grains are distributed in a divergent shape along the diameter direction of the high-nickel multi-element positive electrode material, the aspect ratio L/R of the primary grains in the positive electrode material is greater than or equal to 3, and the radial distribution ratio of the primary grains in the positive electrode material is greater than or equal to 60%. The lithium ion battery containing the positive electrode material has high capacity and greatly improved particle strength.

Abstract: An electric toothbrush replacement head is provided and includes a replacement head handle; an opening disposed on an end of the replacement head handle; a transmission connecting part disposed in the opening; at least one through-groove disposed on an edge of the transmission connecting part; a transmission directional elongated groove disposed in the transmission connecting part; reinforced ribs disposed between the transmission connecting part and a portion where the replacement head handle is provided with the opening. The electric toothbrush replacement head with a reasonable structure is easy to replace and stable for using. Furthermore, the electric toothbrush replacement head is convenient, safe and reliable, which can also eliminate motor noise.

Abstract: A session message generation method, apparatus and device and storage medium. The method includes: acquiring historical session messages between a session robot and a target user in the current man-machine session process and a session reference information set related to a session topic when it is detected that there is a trigger event in the current man-machine session process; determining a target session role of the session robot at the time of performing a message input operation according to the historical session messages and the session reference information set; and generating a target session message corresponding to the target session role based on the historical session messages and the session reference information set, and outputting the target session message.

Abstract: The present disclosure discloses a lithium-manganese rich material and a preparation method and a use thereof.

Abstract: The present disclosure relates to the technical field of lithium ion battery, and discloses a Lithium-Manganese-rich material and a preparation method and a use thereof.

Abstract: The present invention relates to compounds of formula (I), wherein R1 to R3, n and A are as described herein, and their pharmaceutically acceptable salt thereof, and compositions including the compounds and methods of using the compounds.

Abstract: A supercritical carbon dioxide state monitoring and control system based on infrared spectrum characteristic analysis. The system includes: a test section for carbon dioxide to pass through; an infrared light source emitting a detection beam to the carbon dioxide passing through the test section; an infrared spectrometer receiving and analyzing the detection beam passing through the carbon dioxide; and a pressure control module controlling pressure of the carbon dioxide at a set value. In addition, the system also includes a temperature control module capable of monitoring and adjusting temperature of the supercritical carbon dioxide. The supercritical carbon dioxide state monitoring and control system may monitor and control a state of the carbon dioxide at an inlet of an apparatus under an actual operation condition in a Brayton cycle system, which improves working performance of the apparatus in the Brayton cycle system, thereby improving overall efficiency of the Brayton cycle system.

Abstract: An electric toothbrush head includes a brusher, a supporting housing, a transmission shaft, and a tail plug. The brusher is provided with a hairy surface, an inner wall of the brusher away from the hairy surface is provided with an outer ring column, a pothole is provided in a middle of the outer ring column, and two spiral fitting grooves are provided at two symmetrical ends of an outer sidewall of the outer ring column. A connector is provided on a top of the supporting housing and matched with the brusher, a cylinder is provided in a middle of the connector and matched with the outer ring column, two first bayonets are provided at two symmetrical ends of an inner wall of the connector and snapped with the two spiral fitting grooves. The electric toothbrush head can improve the cleanliness, prolong the service life and eliminate the noise.

Abstract: The present invention relates to compounds of formula (I), wherein R1 to R3, A and Q are as described herein, and their pharmaceutically acceptable salt, enantiomer or diastereomer thereof, and compositions including the compounds and methods of using the compounds.

Abstract: A method for creating branch fractures in an oil well, including: injecting a first pad fluid containing a first absorbent resin to a first position of the main fracture; injecting a second pad fluid containing a second absorbent resin to a second position of the main fracture; after the second absorbent resin absorbs water and expands to form a first plugging layer, injecting a third pad fluid free of absorbent resin to the main fracture to build up a pressure at the first plugging layer; exerting the pressure to sides of the main fracture to form a first branch fracture; breaking the first plugging layer to generate a fragment; bridging the fragment to the first absorbent resin to form a second plugging layer; and injecting a third pad fluid to build up a pressure to form a second branch fracture at the first position.

Abstract: Disclosed is a device and method for measuring the magnitude of a seepage force and its influence on effective stress of a formation. The measuring device includes a lower bearing platform having a pressure testing device fixed on an upper part thereof, and a water storage chamber mounted with a seepage water discharge pipe. A confining pressure loading chamber is mounted on the upper part of the lower bearing platform, and the lower bearing platform is used for placing a sample which has 11 measuring points distributed at equal intervals on an outer wall thereof. An upper and a lower permeable pressure-bearing steel sheet are placed on an upper and a lower end surface of the sample, respectively. The invention can improve the validity and accuracy of measurement and make the calculation result of the test more accurate.