Abstract: Disclosed is a method for preparing a heterogeneous metal composite structure for medical implantation, including the steps of: step 1, preparing titanium alloy powder into a porous skeleton according to different printing strategies; step 2, filling magnesium after being melted into pores of the porous skeleton; and step 3, cooling a titanium-magnesium interpenetrating phase composite structure prepared in step 2 to room temperature, and covering a surface of the titanium-magnesium interpenetrating phase composite structure with a hydroxyapatite coating. In the present disclosure, a porous lattice dot-array structure of titanium alloy is used as a skeleton, and the skeleton pore is filled by pressureless infiltration of magnesium or hot isostatic pressure.

Abstract: The present invention discloses a pin-on-disk type in-situ current-carrying friction testing system, and belongs to the technical field of friction performance testing. The friction testing system includes a pin-on-disk type friction pair, a current loading mechanism, and a magnetic field generating mechanism. The current loading mechanism includes a conductive terminal abutting against an annular sidewall of a disk specimen and used to guide a current in the disk specimen to flow along a horizontal direction, and the magnetic field generating mechanism is used to generate a magnetic field. When a pin specimen and a disk specimen rotate relatively, the pin specimen, the conductive terminal, and the magnetic field generating mechanism are relatively stationary, and an Ampere force generated by the current in the disk specimen flowing in the horizontal direction under the action of the magnetic field faces a support platform.

Abstract: The present invention discloses a rapid dot matrix micro-nano impact indentation testing system. The rapid dot matrix micro-nano impact indentation testing system comprises a three-dimensional electric positioning module, wherein the three-dimensional electric positioning module comprises an XY translation stage and a Z-axis lifting stage; a dot matrix impact indentation module, wherein the dot matrix impact indentation module comprises a three-degree-of-freedom piezoelectric platform arranged on the Z-axis lifting stage, one surface of the three-degree-of-freedom piezoelectric platform is provided with a piezoelectric ceramic actuator, and one end of the piezoelectric ceramic actuator is connected to an indenter; a clamp, wherein the clamp clamps a test piece, and the test piece faces the indenter; and an imaging module, wherein the imaging module comprises a microscope lens.

Abstract: An in-corner modular electric wheel system integrating adjustable king pin and king pin type steering unit includes a wheel assembly, a steering system, a king pin inclination adjusting system and a suspension system. The wheel assembly is configured to support a load of a vehicle, transmit a driving torque and determine a toe angle and a camber angle. The steering system is a king pin type steering system, and is configured for an omni-directional independent wheel steering. The king pin inclination adjusting system is sleeved on the king pin, and is configured to adjust an inclination of the king pin without changing the camber angle. The suspension system has an unequal-length double-wishbone suspension structure, and is provided with a coil spring and a shock absorber to mitigate road impacts and improve ride comfort.

Abstract: Provided is a method for driving behavior modeling based on spatio-temporal information fusion, relating to the field of driving behavior simulations. The method includes: constructing a driving behavior model, where the driving behavior model includes a spatial information encoding network, a temporal information encoding network, a feature fusion network, and a feature decoding network, with the feature fusion network being connected to both the spatial information encoding network and the temporal information encoding network, and the feature decoding network being connected to the feature fusion network; determining a future trajectory sequence of a target main vehicle at future time points based on the trained driving behavior model according to spatial information and temporal information of the target main vehicle, where the target main vehicle is controlled to travel according to the future trajectory sequence at the future time points.

Abstract: The present invention pertains to fracture reduction technology and introduces a frame-type surgical robot for fracture reduction. This robot comprises a mobile end mechanism and a fixed end mechanism, connected by a connection component. The mobile end mechanism includes a traction component linked to a lifting component via a translation component, which in turn is connected to a flipping component through a swing component. The flipping component features a self-rotating component, equipped with a mobile end clamping component. The fixed end mechanism includes an auxiliary traction structure, auxiliary translation structure, hand-cranking lifting structure, auxiliary flipping structure, and a fixed end clamping component. During surgery, the robot is positioned above the operating bed to perform fracture reduction.

Abstract: Disclosed is a clamping device having an automatic direction adjustment function in a vehicle body welding conveying line, including a conveying frame. A driving motor is fixedly connected to a side wall of the conveying frame, and an output shaft end of the driving motor is fixedly connected to a rotating shaft I. The present disclosure facilitates the adjustment of a direction when vehicle bodies to be welded are conveyed on a turning conveying line, and vehicle bodies being conveyed can be corrected to the same horizontal state, to avoid a situation where the clamping device on the conveying line cannot smoothly clamp inclined vehicle bodies for conveying because the vehicle bodies cannot be in the same horizontal plane when being put in.

Abstract: A controllable rapid pressure loading technology for a large volume press is provided. A regular octahedra, plugs, diamond pistons, and a standard are included. The regular octahedra is provided with a cavity with openings at two ends of the cavity. The standard is placed in the cavity. The openings at two ends of the cavity are respectively blocked by the conductive plugs. The diamond piston is arranged between the standard and the plug. The diamond pistons arranged between the standard and the plug has high hardness and has the pressure transmission efficiency superior to that of a common ceramic plug, improving compression efficiency in sample cavity. A loading method of pre-charging a pressure to a pressure loading device first and then rapidly releasing to a pressure loading mold is used to match an improved pressure transmission component, which shortens the pressure loading time of the sample cavity.

Abstract: An acrylate-based single-chain nanoparticle is disclosed, which includes 10-20 parts of methacrylic acid, 1-2 parts of tetramethylguanidine and 1-2 parts of halohydrocarbon. The scheme provided by the disclosure establishes a “meta template” for synthesizing various single-chain nanoparticles, unifies the preparation method of the polyacrylate, simultaneously carries out high-concentration preparation in an aqueous phase only through ultraviolet irradiation, which reduces the production cost, reduces the carbon emission in production, and provides possibility for the industrialized production of the polyacrylate-based single-chain nanoparticle.

Abstract: Disclosed are a metal aluminum nano-adjuvant, a vaccine composition and a preparation method therefor and a use thereof. The vaccine adjuvant comprises metal aluminum nanoparticles, and can be used as a candidate adjuvant for preventive vaccines and therapeutic vaccines for various diseases such as infections, autoimmune diseases and tumors. The combined use of the vaccine adjuvant provided by the present disclosure and antigen can effectively enhance the humoral immune response and the cellular immune response of the vaccine, and the enhancement effect is significantly better than that of the commercially available aluminum hydroxide adjuvant.

Abstract: An endoscopic surgery platform includes a surgical bed and multiple surgical manipulators. Multiple surgical manipulators are arranged in a matrix on both sides of the surgical bed, and a positioning mechanism is arranged at the bottom of the surgical bed. The surgical manipulator can be stored at the bottom of the surgical bed through the positioning mechanism. The positioning mechanism includes a plurality of surgical manipulators positioned on the bottom of the surgical bed, a plurality of lateral moving pairs for moving along the length direction of the surgical bed, and multiple longitudinal moving pairs connected to the output end of multiple lateral moving pairs respectively and used to move along the width direction of the surgical bed. Longitudinal moving pair, lateral moving pairs and surgical manipulators are connected one by one.

Abstract: A separated prosthetic foot with a transverse arch belongs to the technical field of manufacturing of artificial limbs. The characteristics of the transverse arch of the human foot are combined into the previous transverse-straight carbon fiber foot design to improve the stiffness of the prosthetic foot and reduce the weight of the prosthetic foot. A forefoot part employs a separated curved plate design, and two simple curved plates with different curvatures are used for simulating a complex curved surface of the transverse arch of the human, such that the manufacturing cost is reduced, and the various parts of the sole are non-uniform in stiffness distribution: the outer side of the foot is a single-layer forefoot plate with a smaller curvature and minor stiffness; and the inner side of the foot is a double-layer stacked forefoot plate, and the lower layer plate has a large radius in curvature and stiffness.

Abstract: A gas diaphragm driven rapid supercharging device based on a diamond anvil cell is provided which includes a gas diaphragm, a diamond anvil cell press, a hard steel shell and a gas release component. The gas diaphragm and the diamond anvil cell press are positioned inside the hard steel shell, the gas diaphragm is positioned below the diamond anvil cell press, a first opening is formed in a top of the hard steel shell, and a second opening is formed in a bottom of the hard steel shell. The gas release component passes through the second opening of the hard steel shell to be connected with the gas diaphragm through a gas path, and the gas release component is configured for releasing gas at a first inflation speed in a standard pressure experiment, and inflating the gas diaphragm at different driving pressures to obtain a pressure calibration curve.

Abstract: An embedded bionic winch for sampling and exploration of a polar sub-glacial lake, including an actuating chamber, a power chamber, a transition chamber, a sensor chamber, a cable arranging chamber and a slip ring chamber, where the actuating chamber, the power chamber, the transition chamber, the sensor chamber, the cable arranging chamber and the slip ring chamber are arranged in sequence, and are coaxially connected; the power chamber provides a power for the winch, and realizes sealing of motors located therein under water with a certain depth; the transition chamber realizes a power transmission between the power chamber and the cable arranging chamber; the sensor chamber is used for mounting of a tension sensor; the cable arranging chamber realizes retraction and release of a cable through the precise cooperation of a drum and a lead screw, and the slip ring chamber contains a slip ring.

Abstract: Provided are a longitudinal and lateral integrated moving horizon decision making method and apparatus for an autonomous vehicle in a snowy and icy environment based on trajectory prediction, with an aim of reducing the complexity of planning a lane-changing trajectory. The method includes: screening out at least one obstacle, planning a lane-changing trajectory according to the at least one obstacle, establishing a decision making model according to the lane-changing trajectory, and controlling the autonomous vehicle by designing a longitudinal and lateral integrated moving horizon decision making controller according to the decision making model. Further provided are a longitudinal and lateral integrated moving horizon decision making apparatus for an autonomous vehicle in a snowy and icy environment based on trajectory prediction and a storage medium.

Abstract: A method and system for hiding reversible data based on prediction errors are provided, where the method includes: partitioning an image, to obtain a shadow part and a blank part; performing a first-layer embedding process on the shadow part; performing a multi-layer embedding process on the blank part; extracting outermost layer information of the blank part after the multilayer embedding process; and extracting information of the shadow part after the first-layer embedding process. According to the method in the present disclosure, a problem of image distortion during high-capacity data embedding can be effectively solved.

Abstract: The present invention discloses a phosphorylated polypeptide antigen vaccine, comprising at least two polypeptide fragments or conservatively modified variants thereof from human full-length Tau protein, wherein the polypeptide fragments or conservatively modified variants thereof contain phosphorylation sites. The present invention also discloses a complex vaccine formed by coupling a phosphorylated polypeptide antigen vaccine with a carrier. The polypeptide antigen vaccine and the complex vaccine can be used for preventing and/or treating tauopathy comprising Alzheimer's disease (AD).

Abstract: The invention relates to a millimeter-sized bulk spa amorphous carbon material and a method of preparing the same, and the method comprises a step of performing a high-temperature and high-pressure (HTHP) treatment on C60 powder at a temperature of 450-1100° C., preferably 700-1000° C., more preferably 900-1000° C., and most preferably 1000° C., and a pressure of 20-37 GPa, preferably 20-30 GPa, and most preferably 27 GPa, so as to obtain the millimeter-sized bulk sp3 amorphous carbon material. The sp3 carbon content in the amorphous carbon material is adjustable by changing the temperature and pressure conditions, so that the sp3 content is greater than 80%, and the sp3 content of high-quality samples is close to 100%. The optical band gap and thermal conductivity of the series of amorphous carbon materials can be effectively adjusted. The obtained series of amorphous carbon materials have ultra-high hardnesses, high thermal conductivities, adjustable band gaps (1.90-2.

Abstract: A bionic intervertebral disc with mechanical anisotropy includes an upper end plate, a core and a lower end plate. The core includes outer fibrous rings, a middle transition zone and an inner nucleus pulposus. The fibrous rings comprise collagen fiber sheets and collagen fibers, each of the collagen fibers is attached to a surface of a corresponding one of the collagen fiber sheets and arranged at an inclination angle, ones of the collagen fibers which are on every two adjacent layers of the collagen fiber sheets are arranged crosswise with each other. A honeycomb meshing size of a portion, which is located at a fibrous-ring transition zone, of the honeycomb structure is smaller and more compact, and a honeycomb meshing size of a portion, which is located at a nucleus pulposus transition zone, of the honeycomb structure is larger and sparser.

Abstract: The present disclosure relates to a groundwater circulation well group and a circulation mode control method therefor. The groundwater circulation well group includes at least two multi-filter-layer groundwater circulation wells, multiple pumping/injection assemblies, and a control module. The at least two multi-filter-layer groundwater circulation wells are arranged in order along a groundwater flow direction. A wellbore of each multi-filter-layer groundwater circulation well is separated by at least two first packers to form three pumping/injection sections, and each pumping/injection section is internally provided with at least one pumping/injection assembly for water pumping/injection. The water pumping and/or water injection of the pumping/injection assembly is controlled by the control module. A pipe wall of each pumping/injection section is provided with a perforated water pumping/injection screen section.