Abstract: The present disclosure provides a superhydrophobic and self-cleaning anticoagulant composite coating material and a preparation method and use thereof, and relates to the technical field of biomedical materials. In the coating material provided by the present disclosure, a titanium dioxide nanotube-based structure increases microscopic roughness of a surface of a titanium-based metal substrate, and a hydrophobic modification layer reduces surface energy of the material. The rough structure and the hydrophobic modification layer have a synergistic effect to construct a superhydrophobic surface, making the surface of the material have self-cleaning characteristics and low adhesion. Air can be retained on the surface of the material to form an air layer, thereby reducing the contact area between the material and bacteria and platelets in the blood, and inhibiting adhesion of the bacteria, platelets, and plasma proteins to the material.

Abstract: A dust removal system for a laser cleaning machine, including: a filter, a gas pump, a gas pipe and a dustproof nozzle. The dustproof nozzle is fixed on a laser cleaning head provided with a laser cleaning head gas inlet and a laser cleaning head gas outlet; one end of the gas pump is connected to the filter, and the other end thereof is connected to the laser cleaning head gas inlet through the gas pipe; a dustproof nozzle gas inlet is provided on both sides of the dustproof nozzle, a dustproof nozzle gas outlet is provided on the front end of the dustproof nozzle; and the laser cleaning head gas outlet is connected to the dustproof nozzle gas inlet through a pipeline assembly. The present disclosure has the advantages of keeping a lens clean, prolonging service life of the lens, reducing time for replacing the lens, and reducing costs.

Abstract: The present disclosure provides a multi-factor quantitative analysis method for deformation of a neighborhood tunnel. The method includes the following steps: analyzing monitoring data generated at a tunnel site; simulating collapse occurring at a shallow buried section of a tunnel; determining the degree of influence of each factor on the tunnel and a stratum; and determining quantitative influence of each factor on tunnel deformation. The present disclosure can not only provide an accurate theoretical basis for the construction of the shallow buried section of the small-distance tunnel, but also guarantee safety and cost saving during tunnel construction.

Abstract: The present invention relates to a powder dry-pressing molding device and method.

Abstract: The invention discloses a traceable card holder, comprising a first clamp plate, a second clamp plate, an elastic band, top cover components, bottom cover components, a tracker and an elastic clamp; the first clamp plate is arranged oppositely to the second clamp plate, the elastic band is connected respectively with the first clamp plate and the second clamp plate, and the elastic band is used to drive the first clamp plate and the second clamp plate to move towards each other for clamping; the top cover components are detachably mounted on one side of the first clamp plate which is away from the second clamp plate, and the tracker is detachably mounted on the top cover components.

Abstract: The invention provides a power distribution and drive system for a remotely underwater operated vehicle ROV, comprises: a high-voltage DC power supply device, located above the water surface to provide high-voltage DC voltage to the ROV; a DC buck conversion device, connected to the high-voltage DC power supply device through a cable for converting the high-voltage DC voltage to a low-voltage DC voltage to supply power to the ROV, wherein the DC buck conversion device comprises multiple parallel DC conversion modules, each DC conversion module bearing an average load current to supply power to the ROV; and at least one thruster, which comprises a propeller, a synchronous motor, and a driver.

Abstract: The present disclosure relates to a method and system for determining a rational width of a gob-side working face under a condition of thick and hard key strata. The method includes: constructing a piecewise function with a width of a gob-side working face as an independent variable; obtaining values of parameters of the gob-side working face; determining a solution set based on the values of the parameters of the gob-side working face, the piecewise function, and a predetermined function threshold; and determining a numerical value according to the solution set as a rational width and mining the gob-side working face according to the rational width.

Abstract: Aspects of the present disclosure are directed toward systems and methods for detecting force applied to a distal tip of a medical catheter. In some embodiments, a medical catheter with a deformable body near a distal tip of the catheter deforms in response to a force applied at the distal tip, and a sensor detects various components of the deflection. Processor circuitry may then, based on the detected components of the deformation, determine a force applied to the distal tip of the catheter.

Abstract: An apparatus for controlling an electroporation catheter is provided. The electroporation catheter includes a distal end, a proximal end, a plurality of splines extending from the distal end to the proximal end, and a plurality of electrodes arranged on the plurality of splines and defining at least one quadripolar array, each quadripolar array defined by four electrodes of the plurality of electrodes. The apparatus includes a pulse generator coupled to the electroporation catheter, and a computing device coupled to the pulse generator, the computing device operable to control the pulse generator to selectively energize the electrodes defining the at least one quadripolar array according to a first energization pattern, and selectively energize the electrodes defining the at least one quadripolar array according to a second energization pattern, wherein the first and second energization patterns are different from one another.

Abstract: The invention discloses a traceable card holder, comprising a first clamp plate, a second clamp plate, an elastic band, top cover components, bottom cover components, a tracker and an elastic clamp; the first clamp plate is arranged oppositely to the second clamp plate, the elastic band is connected respectively with the first clamp plate and the second clamp plate, and the elastic band is used to drive the first clamp plate and the second clamp plate to move towards each other for clamping; the top cover components are detachably mounted on one side of the first clamp plate which is away from the second clamp plate, and the tracker is detachably mounted on the top cover components.

Abstract: Aspects of the present disclosure are directed toward systems and methods for detecting force applied to a distal tip of a medical catheter. A medical catheter includes a deformable body near a distal tip of the catheter that deforms in response to a force applied at the distal tip, and a sensor detects various components of the deflection. Processor circuitry may then, based on the detected components of the deformation, determine a force applied to the distal tip of the catheter.

Abstract: A prosthetic heart valve includes a non-collapsible annular frame extending between an inflow edge and an outflow edge, the frame having a plurality of annularly spaced commissure posts adjacent the outflow edge. A valve assembly including a plurality of leaflets is connected to the frame. The frame includes a weakened portion such that the frame is expandable from an initial condition having a first diameter to an expanded condition having a second diameter larger than the first diameter when a radially outward force is applied to an inner surface of the frame. A stabilizing strut may be positioned adjacent the weakened portion to reinforce the frame. The prosthetic heart valve may include an expandable ring positioned around the expandable frame.

Abstract: The invention relates to the technical field of gene treatment and nano targeted delivery, in particular to a siRNA delivery system compound as well as a preparation method and application thereof.

Abstract: A prosthetic heart valve includes a non-collapsible annular frame extending between an inflow edge and an outflow edge, the frame having a plurality of annularly spaced commissure posts adjacent the outflow edge. A valve assembly including a plurality of leaflets is connected to the frame. The frame includes a weakened portion such that the frame is expandable from an initial condition having a first diameter to an expanded condition having a second diameter larger than the first diameter when a radially outward force is applied to an inner surface of the frame. A stabilizing strut may be positioned adjacent the weakened portion to reinforce the frame. The prosthetic heart valve may include an expandable ring positioned around the expandable frame.

Abstract: Disclosed are a vehicle-mounted display terminal and a vehicle. The vehicle-mounted display terminal includes: a display screen; and an electrical connector mounted to the display screen and electrically connected to the display screen, the electrical connector being integrated with a plurality of wiring harness connecting positions, the plurality of wiring harness connecting positions being configured to transmit at least two different types of data and being electrically connected to the vehicle.

Abstract: A method for controlling target massage equipment, a device for controlling the target massage equipment, and a non-transitory computer readable storage medium. The method includes obtaining at least one of an arm swing frequency or a total exercise intensity when a user is doing exercise through a wearable device, obtaining exercise information according to the at least one of the arm swing frequency or the total exercise intensity, and controlling the target massage equipment to operate according to the exercise information.

Abstract: A method, apparatus and medium for controlling a self-balancing scooter are provided. The method includes: detecting a target navigation marker used for navigating the self-balancing scooter; and controlling the self-balancing scooter to travel according to the target navigation marker when the target navigation marker is detected.

Abstract: Provided are a new crystal form of fludarabine phosphate, a preparation method therefor, a pharmaceutical composition containing same, and an application thereof in preparing medicine. Crystal forms I and II of the fludarabine phosphate have excellent properties in terms of solubleness, dissolution rate, chemical stability, and processing adaptability.