Abstract: This application relates to simulation equipment, and more particularly to an apparatus and method for simulating a line running state of magnetic levitation. The apparatus includes a levitation-guidance mechanism, a moving mechanism and a magnetic guideway fluctuation simulated mechanism. The levitation-guidance mechanism is configured to detect a force on a single Dewar of a maglev train to be simulated. The moving mechanism is configured to move the levitation-guidance mechanism. The magnetic guideway fluctuation simulated mechanism is arranged below the levitation-guidance mechanism, and is configured to apply a variable force to the levitation-guidance mechanism. The variable force is configured to simulate a constantly-variable electromagnetic force applied to the levitation-guidance mechanism by a real track.

Abstract: An image processing method and apparatus, and a device and a storage medium. The method includes: in response to a received service execution instruction, identifying a target object in a video stream which is captured in real time, and determining position information of the target object in the video stream; displaying a virtual model on the target object in the video stream according to the position information; playing a target audio on loop, and controlling, according to the target audio, the virtual model to display a corresponding animation expression.

Abstract: A window cleaning robot includes a main body having a base assembly, a housing and a plurality of elastic wiper modules. The elastic wiper module includes an elastic component and a wiper, wherein a first end of the elastic component is coupled to the base assembly and at least one second end is coupled to the wiper. The first end is opposite to the second end and the wiper is leaned against window glass under acting force of the elastic component.

Abstract: The present disclosure provides a two-stroke pumping method and oil production device, and relates to the technical field of oil production. The oil production device comprises a pump body, wherein the oil production device further comprises a central tube of a hollow structure, and the central tube is partially located in the pump body and coaxially arranged with the pump body; a traveling valve and a standing valve are arranged on the left side and the right side of the outer wall of the central tube respectively, and the traveling valve is arranged between the pump body and the central tube; the standing valve is located outside the pump body; the traveling valve and the standing valve are matched with the pump body and the central tube to form an oil pumping space; and an oil pumping assembly is further arranged in the oil pumping space.

Abstract: Disclosed are a shoulder rig and a photographic device, relating to the technical field of photographic equipment. The shoulder rig includes a main bracket and a battery bracket. One end of the main bracket is provided with two handles, an upper side of the main bracket is configured to support a camera, and a back side of the main bracket is configured to be put on a shoulder. The battery bracket is movably provided on another end of the main bracket and the battery bracket is configured to install a battery pack.

Abstract: Disclosed are an electrically-controlled upper handle and an imaging accessory. The electrically-controlled upper handle is configured to be mounted on the imaging device and includes a handle portion, a mounting portion and an electrically-controlled mechanism. The mounting portion is connected to the handle portion and is configured to be mounted on the imaging device. The electrically-controlled mechanism is arranged on the handle portion, is configured to be electrically connected to the imaging device, and determines the type of the imaging device according to a connection signal of the electrically-controlled mechanism and the imaging device so as to control electrically-controlled work of the imaging device.

Abstract: The present disclosure provides a weakly-centralized frequency regulation control method of a charge station cluster based on virtual leader and a medium. Firstly, based on the control strategy of the virtual synchronous generator and the requirements of the electric vehicles and the charge stations, an architecture of the virtual synchronous generator of the electric vehicles and the charge stations is established. Secondly, based on the control strategy of the collaborative topology design of multiple charge stations, a virtual leader is determined and a weakly-centralized consistency algorithm is designed. Finally, a control strategy of the collaborative frequency regulation of the charge station cluster is proposed to achieve the weakly-centralized frequency regulation control of the charge station cluster.

Abstract: Disclosed is a follow focus. The follow focus includes the gear box, the handwheel assembly and the follow focus assembly. The handwheel assembly includes a handwheel body and an active worm, the active worm is fixed to the handwheel body and extends toward the gear box, and the active worm is provided with a first worm gear; and a follow focus assembly includes a follow focus gear and a driven worm, the driven worm is fixed to the follow focus gear and extends toward the gear box, the driven worm is provided with a second worm gear, an angle between the active worm and the driven worm is 90°, and the first worm gear is meshed with the second worm gear.

Abstract: Disclosed is a flashlight. The flashlight includes a rotating shaft assembly, a lamp head assembly, a control assembly and a damping member. The lamp head assembly is rotatably installed on the rotating shaft assembly; the control assembly is connected to the rotating shaft assembly; and the damping member is provided between the lamp head assembly and the rotating shaft assembly. The damping member is configured to increase a resistance to a rotation of the lamp head assembly relative to the rotating shaft assembly.

Abstract: A quaternary ammonium salt compound of formula I is fast-acting and has a long-term local anaesthetic effect after a single administration, the sensory nerve block time being longer than the motor nerve block time, has both a long-acting local anaesthetic effect and a selective local anaesthetic effect, and also significantly reduces the side effects of quaternary ammonium salt compounds with the structural features of surfactants and is highly safe; thus, the compound of formula I and the pharmaceutically acceptable salt thereof can be used for the preparation of saft drugs having a long-term local anaesthetic effect and a selective local anaesthetic effect

Abstract: Disclosed are a quick-release plate assembly and a tripod. The quick-release plate assembly is applied to a pan-tilt, including: a base and a quick-release plate. The base is provided with a sliding groove and a plurality of stopping portions, the sliding groove is penetrating through the base, each end of the sliding groove is provided with a protruding stopping portion. The quick-release plate slidably is arranged in the sliding groove, one side of the quick-release plate towards the sliding groove is provided with an abutting convex portion corresponding to two ends of the sliding groove, the quick-release plate can slide back and forth along the sliding groove, and the abutting convex portion can abut against the protruding stopping portion. At least one stopping portion is movably arranged on the base, to make the protruding stopping portion match a position of a corresponding abutting convex portion.

Abstract: The present disclosure relates to an airtightness detection equipment for detecting the airtightness of a pedestal on which a target is mounted, comprising: a sealing device configured to hermetically adhere to the pedestal, forming a sealed space between the sealing device and the pedestal; a vacuum pumping device configured to evacuate the sealed space; a gas detection device configured to detect gas in the sealed space.

Abstract: A starter has a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear and a switch box configured to turn on the electric motor. The output gear is driven by the electric motor via the speed reduction device and the clutch. The starter also has a stationary axle on which the output gear is installed. The electric motor has an output shaft. The speed reduction device has a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear being rotatably mounted to the axle via a bushing.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.