Abstract: An augmented reality (AR)-assisted enhanced fracture reduction fixator includes a bidirectional telescopic rod and two connecting columns, a ball groove is provided in a middle part of each of the two connecting columns, a ball is rotatably connected to an inner wall of each of the two ball grooves, and the two balls are fixedly connected to a telescopic end of the bidirectional telescopic rod. A rectangular slider is slid to a suitable needle insertion position and angle, and a bone nail is inserted into proximal and distal ends of a fracture. Then, the rectangular slider is fixed by screwing. Based on different fracture sites of a patient, two fixing frame bodies need to adapt to the fracture sites of the patient, that is, an angle between the two fixing frame bodies will change. The ball rotates in the corresponding ball groove.

Abstract: A device for rapid reduction and external fixation of a limb fracture comprises a C-shaped splint, a fixed splint, a reduction arc plate, and a limiting component. The limiting component includes a connecting frame and a connecting arc plate. An outer wall of the connecting frame is provided with a fixed pressing plate, and a bottom of the fixed pressing plate is provided with a positioning clamping plate. A plurality of positioning slots are provided in the connecting frame and the connecting shaft. The positioning clamping plate is fixedly sleeved in the positioning slots.

Abstract: A portable vacuum mixing device for bone cement during surgery, includes an extraction housing and a mixing housing. A miniature vacuum pump is fixedly connected to an upper end of the extraction housing, a powder raw material inlet is provided at a position of the upper end of the extraction housing close to the miniature vacuum pump, and a liquid raw material storage cavity is formed inside the extraction housing. A mixing chamber is provided inside the mixing housing, and a bone cement mixing unit is provided inside the mixing housing. The device is compact and portable, allowing for its use directly within the operating room during an ongoing surgery. Moreover, by employing the bone cement mixing unit, the device significantly reduces manual labor intensity. Owing to the implementation of vacuum mixing, the device achieves a better mixing effect.

Abstract: A method includes receiving, by a data processing apparatus, a plurality of file operation requests, each file operation request including a priority, a deadline, and an operation type and representing a request to perform an operation on at least one file maintained in a distributed file system; identifying, by the data processing apparatus, a group of file operation requests to be executed together from the plurality of file operation requests, the identification based at least in part on at least one of: the file operations in the group of file operations being directed to a same storage system, or file operations in the group of file operations sharing a common operation type; and sending a request to execute the group of file operation requests to a system configured to perform the group of file operation requests.

Abstract: A method for auxiliarily planning a fracture reduction path based on an augmented reality technology includes: obtaining fracture image data for a fracture area of a patient, the fracture image data including computer tomography (CT) data and X-ray data; reconstructing a three-dimensional model of a fracture part based on the fracture image data; matching and calibrating the three-dimensional model of the fracture part based on the fracture area of the patient in an actual scene; inputting a calibrated three-dimensional model of the fracture part and a corresponding fracture type and fracture surgery requirement into a fracture reduction path planning model to determine at least one corresponding optimized fracture reduction path, where the fracture reduction path planning model includes a cascaded reinforcement learning (RL) module and a multi-physics field simulation optimization module; and rendering each fracture reduction path, and determining a target fracture reduction path according to a detected inte

Abstract: A device for rapid reduction and external fixation of a limb fracture comprises a C-shaped splint, a fixed splint, a reduction arc plate, and a limiting component. The limiting component includes a connecting frame and a connecting arc plate. An outer wall of the connecting frame is provided with a fixed pressing plate, and a bottom of the fixed pressing plate is provided with a positioning clamping plate. A plurality of positioning slots are provided in the connecting frame and the connecting shaft. The positioning clamping plate is fixedly sleeved in the positioning slots.

Abstract: The present disclosure provides a method and system for overlay presentation of a skeletal image based on augmented reality, relating to the technical field of smart medical systems. The method includes obtaining fracture imaging data for a fracture region of a patient, the fracture imaging data including a CT image, an X-ray image, and a light-field image; parsing a ray model corresponding to the light-field image, the ray model providing spatial propagation information of a light in the fracture region of the patient; determining a multimodal fusion feature corresponding to the fracture imaging data based on the ray model and a feature fusion network; reconstructing a three-dimensional model of a fracture part based on the multimodal fusion feature; and aligning and calibrating the reconstructed three-dimensional model of the fracture part with the fracture region of the patient in an actual surgical scene.

Abstract: Provided herein is a method for coating an orthodontic elastomeric ligature tie with fluoride in which a solution of a coating medium, for example, polycaprolactone, containing calcium fluoride is coated and dried on the O-ring. Also provided are the coated orthodontic elastomeric ligature ties as prepared by the method and oral devices to re-mineralize decalcified tooth enamel lesions. Methods for treating demineralization in tooth enamel with the coated orthodontic elastomeric ligature ties, for re-mineralizing decalcified tooth enamel lesion in subjects with orthodontia and for optimizing time-release of fluoride from the coated orthodontic elastomeric ligature tie are provided. A kit to prepare the coated orthodontic elastomeric ligature tie is provided.

Abstract: Embodiments described herein relate to an apparatus that includes a first plate with an embedded channel that has a seamless surface, and where the first plate includes a metallic material. In an embodiment, the apparatus further includes a second plate over the first plate, where the second plate is spaced apart from the first plate by a gap. In an embodiment, a heating element is embedded within the second plate.

Abstract: The present disclosure relates to a user equipment, an electronic device, a wireless communication method, and a storage medium. The user equipment according to the present disclosure comprises a processing circuit configured to: determine a physical layer key according to features of a wireless channel between the user equipment and a serving network; receive a serving network message authentication code and a home network authentication token from the serving network; determine an authentication parameter according to the physical layer key and the home network authentication token; and authenticate the serving network according to the authentication parameter and the serving network message authentication code. By using the user equipment, electronic device, wireless communication method, and storage medium according to the present disclosure, an authentication process in a scenario where the user equipment roams can be optimized.

Abstract: An elastic intramedullary fixation device includes a serpentine frame and a shell, the inner surface of the shell is rotatably connected with a locking rod, one end of the locking rod is inserted with a key rod, one end of the shell is inserted with a clamping rod, the outer surfaces of the clamping rod and the key rod are sleeved with a connecting sleeve, the outer surfaces of the clamping rod and the key rod are provided with a connecting component, and the surfaces of the clamping rod and the shell are provided with a self-locking component. By configuring a connecting component and a self-locking component, the connecting component not only allows for the adjustment of the positional relationship between the key rod and the clamping rod, but also enables engagement with the locking component, thereby enhancing the stability of the connection between the clamping plate and the shell.

Abstract: A proximal-femur intraosseous release device includes a release mechanism. A primary fixing mechanism is provided at one end of the release mechanism, the primary fixing mechanism includes a first shell, and a second shell, a first triangular block and a second triangular block are arranged inside the first shell; the second shell is screwed to the first shell through threads, a bottom of the second shell is rotatably connected with the first triangular block, the first triangular block is slidably connected with the first shell, a bottom surface of the first triangular block is an inclined surface, the second triangular block is located at a bottom of the first triangular block, a top surface of the second triangular block is an inclined surface, and a through hole matched with the second triangular block is formed in the first shell.

Abstract: An elastic intramedullary fixation device includes a serpentine frame and a shell, the inner surface of the shell is rotatably connected with a locking rod, one end of the locking rod is inserted with a key rod, one end of the shell is inserted with a clamping rod, the outer surfaces of the clamping rod and the key rod are sleeved with a connecting sleeve, the outer surfaces of the clamping rod and the key rod are provided with a connecting component, and the surfaces of the clamping rod and the shell are provided with a self-locking component. By configuring a connecting component and a self-locking component, the connecting component not only allows for the adjustment of the positional relationship between the key rod and the clamping rod, but also enables engagement with the locking component, thereby enhancing the stability of the connection between the clamping plate and the shell.

Abstract: An augmented reality (AR)-assisted enhanced fracture reduction fixator includes a bidirectional telescopic rod and two connecting columns, a ball groove is provided in a middle part of each of the two connecting columns, a ball is rotatably connected to an inner wall of each of the two ball grooves, and the two balls are fixedly connected to a telescopic end of the bidirectional telescopic rod. A rectangular slider is slid to a suitable needle insertion position and angle, and a bone nail is inserted into proximal and distal ends of a fracture. Then, the rectangular slider is fixed by screwing. Based on different fracture sites of a patient, two fixing frame bodies need to adapt to the fracture sites of the patient, that is, an angle between the two fixing frame bodies will change. The ball rotates in the corresponding ball groove.

Abstract: A method for auxiliarily planning a fracture reduction path based on an augmented reality technology includes: obtaining fracture image data for a fracture area of a patient, the fracture image data including computer tomography (CT) data and X-ray data; reconstructing a three-dimensional model of a fracture part based on the fracture image data; matching and calibrating the three-dimensional model of the fracture part based on the fracture area of the patient in an actual scene; inputting a calibrated three-dimensional model of the fracture part and a corresponding fracture type and fracture surgery requirement into a fracture reduction path planning model to determine at least one corresponding optimized fracture reduction path, where the fracture reduction path planning model includes a cascaded reinforcement learning (RL) module and a multi-physics field simulation optimization module; and rendering each fracture reduction path, and determining a target fracture reduction path according to a detected inte

Abstract: A proximal-femur intraosseous release device includes a release mechanism, wherein a primary fixing mechanism is provided at one end of the release mechanism, the primary fixing mechanism includes a first shell, and a second shell, a first triangular block and a second triangular block are arranged inside the first shell; the second shell is screwed to the first shell through threads, a bottom of the second shell is rotatably connected with the first triangular block, the first triangular block is slidably connected with the first shell, a bottom surface of the first triangular block is an inclined surface, the second triangular block is located at a bottom of the first triangular block, a top surface of the second triangular block is an inclined surface, and a through hole matched with the second triangular block is formed in the first shell.

Abstract: The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

Abstract: The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

Abstract: The present disclosure provides a worm gear machine, including a workbench, a cutter holder and a cutter holder adjusting system, where the cutter holder includes a big bracket, a first slide rail is disposed on the big bracket, a slide seat in sliding fit with the first slide rail is disposed on the first slide rail, a second slide rail is disposed on the slide seat, a small bracket in sliding fit with the second slide rail is disposed on the second slide rail; and a cutter holder spindle is disposed between the big bracket and the slide seat, a cutter bar synchronously rotating with the cutter holder spindle is disposed between an end of the cutter holder spindle facing toward the small bracket and the small bracket, and a gearbox for driving the cutter spindle to rotate is disposed in the big bracket.

Abstract: A method for identifying a critical error of a worm gear machine, step 1: obtaining an actual forward kinematic model T27a and an ideal forward kinematic model T27i from a coordinate system of a worm gear hob to a coordinate system of a worm gear, thereby establishing a geometric error-pose error model of the worm gear machine; step 2: regarding the geometric error-pose error model of the worm gear machine as a multi-input multi-output (MIMO) nonlinear system, and solving, by taking the geometric error of each motion axis of the worm gear machine as an input feature X, and a pose error between the worm gear hob and the worm gear as an output variable Y, an importance coefficient of each input feature with a random forest algorithm; and step 3: determining a critical error affecting a machining accuracy of the worm gear machine.