Abstract: The present disclosure provides a pump body assembly, a heat exchange apparatus, a fluid machine and an operating method thereof. The pump body assembly includes a piston, a shaft, a piston sheath, and a cylinder. The shaft drives the piston to rotate and reciprocate within the piston sheath while rotating. The piston sheath is located in the cylinder, and a compression chamber is defined between an outer circumferential wall of the piston and an inner wall of the cylinder. A pressure relief recess is defined in the outer circumferential wall of the piston or the inner wall of the cylinder at a position corresponding to the compression chamber.

Abstract: A negative electrode active material includes graphite and amorphous carbon, where according to Raman testing, the negative electrode active material satisfies: 1.6?WD/WG?2.6, where WD is a peak width at half height of peak D within 1340 cm?1 to 1370 cm?1 in the Raman spectrum, 40 cm?1?WD?100 cm?1, and WG is a peak width at half height of peak G within 1570 cm?1 to 1590 cm?1, 15 cm?1?WG?50 cm?1. The negative electrode active material undergoes surface treatment, where the surface thereof has a higher surface lattice defect degree, effectively improving a gram capacity and kinetics performance thereof, thereby making the electrochemical apparatus including the negative electrode active material have both high energy density and good electrochemical performance.

Abstract: A bullet-screen comment processing method is provided. The method includes: receiving a first bullet-screen comment and a second bullet-screen comment; classifying the first bullet-screen comment into a first bullet-screen comment group and classifying the second bullet-screen comment into a second bullet-screen comment group based on bullet-screen comment content of the first bullet-screen comment and the second bullet-screen comment; and displaying the first bullet-screen comment of the first bullet-screen comment group and the second bullet-screen comment of the second bullet-screen comment group by using a target bullet-screen comment track, where the first bullet-screen comment of the first bullet-screen comment group and the second bullet-screen comment of the second bullet-screen comment group move in the target bullet-screen comment track in opposite directions.

Abstract: This application provides a bullet-screen comment display method. The bullet-screen comment display method applied to a client includes: obtaining a subscription type of a user for a target live room and a bullet-screen comment type of a to-be-displayed bullet-screen comment in the target live room; determining a target display parameter of the to-be-displayed bullet-screen comment based on the subscription type and the bullet-screen comment type, where the target display parameter includes a target display area and a target display direction, and different bullet-screen comment types correspond to different display areas and display directions; and rendering the to-be-displayed bullet-screen comment in the target display area in the target live room based on the target display direction.

Abstract: This application provides a bullet-screen comment display method. The bullet-screen comment display method includes: obtaining a to-be-displayed target bullet-screen comment; in a case in which a display type of the target bullet-screen comment is a multi-direction bullet-screen comment display type, obtaining a pre-configured motion parameter corresponding to the multi-direction bullet-screen comment display type, where the multi-direction bullet-screen comment display type is a bullet-screen comment display type in which mobile display is performed from a preset start position to multiple preset movement directions; and dynamically displaying the target bullet-screen comment along a target movement direction from the preset start position based on the motion parameter.