Abstract: An image registration method, device, and orthopedic surgery navigation system based on image registration. The method comprises: generating an initial object posture of an object to be registered, and an initial front posture and an initial lateral posture of an X-ray machine; performing registration optimization for the initial object posture to generate a target object posture of the object to be registered; performing registration optimization for the initial lateral posture of the X-ray machine to generate a registered target lateral posture; and integrating the target object posture of the object to be registered, the target lateral posture of the X-ray machine, and the initial front posture of the X-ray machine into a registration optimization result. the method, device and system can optimize the object posture, and accurately register the lateral posture of the X-ray machine even is its position is inaccurate, improve the accuracy and usability of the registration method.

Abstract: A guide rail is mounted on a frame of a massage chair and contains: a support track, a seat track, and a flexible guiding assembly. An end of the flexible guiding assembly is connected with the support track, and the other end of the flexible guiding assembly is connected with the seat track. The flexible guiding assembly includes multiple flexible modules arranged along the extending path of the guide rail. A gap is defined between any two adjacent flexible modules, and any two adjacent flexible modules are rotatably connected by using a rotatable connector. A rotation axial line of the rotatable connector is perpendicular to the extending path of the guide rail, and a width of the gap is adjustable by rotating any two adjacent flexible modules to bend the flexible guiding assembly, hence an angle between the support track and the seat track is changeable.

Abstract: A tractor, including a frame, a power wheel and a connecting assembly. The power wheel is rotatably arranged on a bottom of the frame. The connecting assembly is arranged on the frame and is configured to be attached to a goods carrier. The power wheel is rotatable relative to the frame to drive the frame to move, so as to drive the goods carrier to move synchronously through the connecting assembly. The connecting assembly is configured to move back and forth along a first direction relative to the frame to render a relative position between the goods carrier and the frame adjustable along the first direction. The first direction is a travelling direction of the tractor.

Abstract: A reel auxiliary device includes a shell, a locking mechanism, a decelerating mechanism and a transmission part. A first side of the shell is provided with a first groove, and a second side of the shell is provided with a second groove. The locking mechanism is arranged in the first groove, and is configured to control locking of a reel. The decelerating mechanism is arranged in the second groove. The shell, the locking mechanism, the decelerating mechanism, and the transmission part are connected through a connecting part, and the shell, the locking mechanism, the decelerating mechanism, the transmission part and the connecting part are arranged coaxially. A reel including the auxiliary device is further provided.

Abstract: A segmented guide rail of a massage chair contains: a seat track and a support track. The seat track includes a first coupling segment formed on an end thereof, and the support track includes a second coupling segment formed on an end thereof. The first segment and the second segment are connected by two hinge elements, and the seat track and the support track are connected to form at least one connection track on which a massaging mechanism of the massage chair is driven to move back and forth. Thereby, the massaging mechanism of the massage chair moves back and forth, when the support frame rotates to different angles, thus massaging the user in different postures successively.

Abstract: A brake handle device includes a seat body, a microswitch, a wrench and an elastic piece, wherein the microswitch is electrically connected with a driving motor and a power supply, and includes a main body part and a braking part; the main body part is arranged on the seat body; the braking part extends into the main body part and can elastically expand and contract relative to the main body part; the wrench is rotatably arranged on the seat body and can be abutted against the braking part; and the elastic piece is arranged on the seat body and connected with the wrench. The wrench is held to drive the wrench to rotate in the direction close to a handlebar; and the wrench is released to make the wrench rotate and reset.

Abstract: A massager for massaging limbs contains: an armrest including two accommodation cavities configured to receive two arms of a user, multiple air bags arranged on a top of a respective one accommodation cavity, and a driver fixed on a bottom of the respective one accommodation cavity. The driver includes a protective shell disposed on the armrest, at least one rotation disc arranged on the protective shell, a drive source, and a transmission mechanism. The drive source is connected with the at least one rotation disc via the transmission mechanism, and a respective one rotation disc includes multiple massage protrusions located outside the protective shell.

Abstract: A method for constructing an efficient product surface defect detection model based on network collaborative pruning is provided. According to an initial product surface defect detection model, the method provides a network-based collaborative pruning method and constructs the efficient product surface defect detection model. On a premise of ensuring an accuracy of a product defect detection method, a product surface defect detection time is reduced to satisfy manufacturer's requirements on the product surface defect detection time and accuracy of product surface defects.

Abstract: A crusher includes a blade assembly and a drive assembly. The blade assembly includes a first blade and a second blade. The drive assembly is respectively connected with the first blade and the second blade, and is configured to drive the first blade and the second blade to rotate. The first blade is configured to disperse and perform primary cutting of the materials. The second blade is configured to perform secondary cutting of the materials. The first blade makes the materials fully disperse, so that the second blade can fully cut the materials. In addition, the first blade initially cuts the materials, so that the formed fragments can achieve a better fertilization effect.

Abstract: An air compressor includes a controller, a pump and an air storage tank. The pump is in communication with the air storage tank. A first air inlet and a first air outlet are provided on the pump. The pump is configured to pump an external air into the air storage tank. The controller is provided at the first air inlet of the pump, and is electrically connected with the pump. The controller is configured to control the operation of the pump. The external air is in contact with the controller, and enters the pump through the first air inlet and then flows out of the pump through the first air outlet, so as to realize a heat dissipation of the pump and the controller.

Abstract: A crusher includes a blade assembly and a drive assembly. The blade assembly includes a first blade and a second blade. The drive assembly is respectively connected with the first blade and the second blade, and is configured to drive the first blade and the second blade to rotate. The first blade is configured to disperse and perform primary cutting of the materials. The second blade is configured to perform secondary cutting of the materials. The first blade makes the materials fully disperse, so that the second blade can fully cut the materials. In addition, the first blade initially cuts the materials, so that the formed fragments can achieve a better fertilization effect.

Abstract: A method for constructing an efficient product surface defect detection model based on network collaborative pruning is provided. According to an initial product surface defect detection model, the method provides a network-based collaborative pruning method and constructs the efficient product surface defect detection model. On a premise of ensuring an accuracy of a product defect detection method, a product surface defect detection time is reduced to satisfy manufacturer's requirements on the product surface defect detection time and accuracy of product surface defects.

Abstract: A versatile electric cart, including a frame, a handle, a battery, a motor, a wheel and an axle. The frame is provided with components connecting with attachments. The components include a snib, a bolt, a connecting hole and a T-shaped column. The snib is provided at the rear end of the frame. The front and rear beam of the frame are both provided with the screw hole. The front end of the frame is provided with the connecting hole and the T-shaped column. The T-shaped column is provided at the axle, the top and bottom of the T-shaped column are both provided with the screw hole. The front end of the T-shaped column is provided with the connecting hole. The frame is provided with the battery. The attachments are fitted to the frame by the snib, the screw hole, the connecting hole or the T-shaped column.

Abstract: The present invention discloses a brake handle device and an electric tractor. The brake handle device includes a seat body, a microswitch, a wrench and an elastic piece, wherein the microswitch is electrically connected with a driving motor and a power supply, and includes a main body part and a braking part; the main body part is arranged on the seat body; the braking part extends into the main body part and can elastically expand and contract relative to the main body part; the wrench is rotatably arranged on the seat body and can be abutted against the braking part; and the elastic piece is arranged on the seat body and connected with the wrench. The wrench is held to drive the wrench to rotate in the direction close to a handlebar; and the wrench is released to make the wrench rotate and reset.

Abstract: A versatile electric cart, including a frame, a handle, a battery, a motor, a wheel and an axle. The frame is provided with components connecting with attachments. The components include a snib, a bolt, a connecting hole and a T-shaped column. The snib is provided at the rear end of the frame. The front and rear beam of the frame are both provided with the screw hole. The front end of the frame is provided with the connecting hole and the T-shaped column. The T-shaped column is provided at the axle, the top and bottom of the T-shaped column are both provided with the screw hole. The front end of the T-shaped column is provided with the connecting hole. The frame is provided with the battery. The attachments are fitted to the frame by the snib, the screw hole, the connecting hole or the T-shaped column.

Abstract: Disclosed is a method of synthesizing 1,2,4-triazole-3-thione compounds and intermediates thereof. The method includes reacting a hydrazine with glyoxylic acid to form a hydrazono acetic acid intermediate followed by reacting the latter with thiocyanate to obtain the 1,2,4-triazole-3-thione compound. The raw materials involved in the present method are readily available, and the reaction is very specific in terms of regioselectivity, resulting in minimum by-product and high product yield. There are neither specific requirements for special equipment nor special operations such as high vacuum, high temperature, anhydrous and oxygen-free manipulations. The process is simple and generates minimum wastes, suitable for industrial production.