Abstract: The disclosure discloses a manual rotation structure, method, and child safety seat for electric rotating chairs, including a base, a rotary disk, an electric rotary driving assembly, and a locking assembly. Multiple locking holes are spaced around the circumference of the rotary disk, and the electric rotary driving assembly is suitable for driving the rotary disk to rotate electrically relative to the base. The locking assembly includes a mounting base and a lock pin, an electric unlocking assembly, and a manual unlocking assembly, all movably connected to the mounting base. The multiple locking holes are designed to engage with the lock pin one at a time to fix the relative position of the rotary disk and the base. Both the electric unlocking assembly and the manual unlocking assembly are movably connected to the lock pin.

Abstract: A safety seat, comprising a seat structure and a base, the seat structure and the base being rotatably connected. The seat structure comprises a connecting base, an adjusting assembly and a seat body. The seat body is mounted on the connecting base. The adjusting assembly is mounted on the seat body and is selectively connected to the connecting base. When the adjusting assembly is disengaged from the connecting base, the seat body can be disconnected from the connecting base and the base such that the rotation angle of the seat structure relative to the base can be adjusted and the pitch angle of the seat body relative to the connecting base can be adjusted. The rotation angle and the pitch angle can be adjusted simultaneously in a single operation. The convenience of operation is improved and the comfort for a child during use is also improved.

Abstract: This disclosure discloses an electric base and an automobile seat, relating to the field of automotive accessory technology. By setting a first calibration part on the base and a second calibration part on the driving gear, after installing the driving gear on the drive motor, the driving gear can be positioned at a specific installation angle by aligning the first calibration part with the second calibration part. Then, after rotatably inserting the rotary disc into the rotary disc mounting hole on the base, it becomes more convenient for the driving gear to mesh with the passive gear on the rotary disc. This ensures that the rotary disc is installed at a specific angle, preventing any angular deviation of the seat and facilitating installation and angle calibration for manufacturers.

Abstract: The mixed reality high-simulation battlefield first aid training platform includes a hardware part and a software part; the hardware part includes a data processing system, a real-time monitoring system, a head-mounted display device, an intelligent shooting instrument, a wearable sensing instrument, and a manipulation handle; the software part includes a 3D battlefield scene simulation system, a 3D wounded simulation system, a wounded rescue decision system, and a movable large space team cooperation and virtual interaction system; the 3D battlefield scene simulation system includes a geographic environment 3D model and a battle scene 3D model; the data processing system includes a PC terminal having a wireless communication module. A battlefield environment can be highly simulated; a full-process experience including battles with enemies, wounded arising, rescue implementation, and tactical mission completion is provided; battlefield rescue decision and team cooperation training are highlighted.

Abstract: Embodiments of this application relate to the field of antenna technologies, and provide an antenna and an antenna processing method, to reduce structural complexity and assembly difficulty of an antenna, thereby ensuring performance of the antenna. The antenna includes a feeding base plate and a plurality of radiation apparatuses disposed on the feeding base plate, where the feeding base plate is configured to feed power to the plurality of radiation apparatuses; and each of the plurality of radiation apparatuses includes a first insulating base and a first metal conducting layer attached to the first insulating base, the feeding base plate includes a plate-shaped second insulating base and a second metal conducting layer attached to the second insulating base, and first insulating bases and the second insulating base are integrated together. The antenna provided in the embodiments of this application may be used for a multiple-input multiple-output communications system.

Abstract: A biological nitrogen removal method based on multistage feeding and anoxic/aerobic chambers for adopting a constant flow operation mode, enabling wastewater subjected to primary treatment to enter a first-stage and a second-stage A/O reaction units from two position points; lifting and refluxing an effluent to an influent end of the first-stage units; lifting and refluxing an effluent to an influent end of the second-stage units; and clarifying, separating and discharging an effluent from an outlet end of a third-stage A/O reaction unit. The wastewater treatment mode combines a process based on two-stage wastewater feeding and three-stage anoxic/aerobic chambers with biofilms in different reaction zones, =optimizing and controlling a reflux ratio of each segment according to an amount of organic matters available for denitrification in influent, reducing the impact of hydraulic loading at the cross section in the reactors while removing organic matters and nitrogen-containing pollutants at a low temperature.

Abstract: A connection apparatus and a radio frequency module. The connection apparatus includes a conductor assembly and a fastening structure. The fastening structure is configured to fasten the conductor assembly. The conductor assembly includes an outer conductor, an inner conductor, and an insulating elastomer. The inner conductor covers a surface of the insulating elastomer, and the outer conductor and the inner conductor are electrically insulated.

Abstract: A safety seat, comprising a seat structure and a base, the seat structure and the base being rotatably connected. The seat structure comprises a connecting base, an adjusting assembly and a seat body. The seat body is mounted on the connecting base. The adjusting assembly is mounted on the seat body and is selectively connected to the connecting base. When the adjusting assembly is disengaged from the connecting base, the seat body can be disconnected from the connecting base and the base such that the rotation angle of the seat structure relative to the base can be adjusted and the pitch angle of the seat body relative to the connecting base can be adjusted. The rotation angle and the pitch angle can be adjusted simultaneously in a single operation. The convenience of operation is improved and the comfort for a child during use is also improved.

Abstract: The mixed reality high-simulation battlefield first aid training platform includes a hardware part and a software part; the hardware part includes a data processing system, a real-time monitoring system, a head-mounted display device, an intelligent shooting instrument, a wearable sensing instrument, and a manipulation handle; the software part includes a 3D battlefield scene simulation system, a 3D wounded simulation system, a wounded rescue decision system, and a movable large space team cooperation and virtual interaction system; the 3D battlefield scene simulation system includes a geographic environment 3D model and a battle scene 3D model; the data processing system includes a PC terminal having a wireless communication module. A battlefield environment can be highly simulated; a full-process experience including battles with enemies, wounded arising, rescue implementation, and tactical mission completion is provided; battlefield rescue decision and team cooperation training are highlighted.

Abstract: The present disclosure relates to a universal platform for accurately injuring animal under multi-condition and multi-simulation-environment, the platform including a fragment assembly convenient for the animal to be injured by means of a fragment, a shock wave assembly convenient for the animal to be injured by means of shock waves, a low-temperature assembly for providing a low-temperature environment for an injured animal, a low-pressure assembly for providing a low-pressure environment for the injured animal, a burning assembly used for injuring the animal by means of burning, a seawater soaking assembly used for soaking the injured animal in seawater, a photographing assembly used for high-speed photography, and a binding assembly used for fixing the animal during fragment injury, shock wave injury, burning injury and seawater soaking.

Abstract: The present disclosure relates to a universal platform for accurately injuring animal under multi-condition and multi-simulation-environment, the platform including a fragment assembly convenient for the animal to be injured by means of a fragment, a shock wave assembly convenient for the animal to be injured by means of shock waves, a low-temperature assembly for providing a low-temperature environment for an injured animal, a low-pressure assembly for providing a low-pressure environment for the injured animal, a burning assembly used for injuring the animal by means of burning, a seawater soaking assembly used for soaking the injured animal in seawater, a photographing assembly used for high-speed photography, and a binding assembly used for fixing the animal during fragment injury, shock wave injury, burning injury and seawater soaking.

Abstract: A biological nitrogen removal method based on multistage feeding and anoxic/aerobic chambers for adopting a constant flow operation mode, enabling wastewater subjected to primary treatment to enter a first-stage and a second-stage A/O reaction units from two position points; lifting and refluxing an effluent to an influent end of the first-stage units; lifting and refluxing an effluent to an influent end of the second-stage units; and clarifying, separating and discharging an effluent from an outlet end of a third-stage A/O reaction unit. The wastewater treatment mode combines a process based on two-stage wastewater feeding and three-stage anoxic/aerobic chambers with biofilms in different reaction zones, =optimizing and controlling a reflux ratio of each segment according to an amount of organic matters available for denitrification in influent, reducing the impact of hydraulic loading at the cross section in the reactors while removing organic matters and nitrogen-containing pollutants at a low temperature.

Abstract: Embodiments of this application relate to the field of antenna technologies, and provide an antenna and an antenna processing method, to reduce structural complexity and assembly difficulty of an antenna, thereby ensuring performance of the antenna. The antenna includes a feeding base plate and a plurality of radiation apparatuses disposed on the feeding base plate, where the feeding base plate is configured to feed power to the plurality of radiation apparatuses; and the radiation apparatus includes a first insulating base and a first metal conducting layer attached to the first insulating base, the feeding base plate includes a plate-shaped second insulating base and a second metal conducting layer attached to the second insulating base, and first insulating bases and the second insulating base are integrated. The antenna provided in the embodiments of this application is used for a multiple-input multiple-output communications system.