Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

Abstract: A method for allocating virtual reward resources performed by an electronic device are provided. The method includes: obtaining behavior information of each virtual character in a target camp during a teamfight of a game, the target camp including at least one virtual character, the behavior information being a behavior applied by each virtual character in the target camp to a virtual object, and the virtual object being a virtual character in at least one of the target camp or an enemy camp; determining, according to the behavior information, contribution information achieved by each virtual character in the target camp during the teamfight; determining, according to the contribution information, a target virtual character and a target virtual reward resource corresponding to the target virtual character from at least one virtual character included in the target camp; and updating attribute information of the target virtual character according to the target virtual reward resource.

Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

Abstract: A lifting and lowering rod device with a water outlet terminal comprises one or more fixed portions configured to be connected to a wall, a lifting and lowering rod assembly connected to the one or more fixed portions, and a water inflow passage configured to be in communication with an external water source. The water outlet terminal is disposed on the lifting and lowering rod assembly, and the water outlet terminal is in communication with the water inflow passage.

Abstract: This application relates to the technical field of building material processing, and more particularly, to a method for manufacturing a transparent heat-insulation building material based on waste wood. The method includes the following steps of: step S1, wood pretreatment, step S2, wood acetylation treatment, step S3, resin impregnating, and step S4, hot press molding to obtain a densified wood.

Abstract: An aroma diffuser comprises a host and an aromatherapy nebulizer; the host has an air pump received therein; the air pump has an air inlet port and an air outlet port; the aromatherapy nebulizer comprises a nebulizer cap and an essential oil bottle with a dip tube extending from the nebulizer cap into the essential oil bottle for sucking liquid essential oil up. The host sets a mounting ring extending outwards from a sidewall thereof, the aromatherapy nebulizer is installed in the mounting ring in such way that the aromatherapy nebulizer is able to be plugged in or pulled out up and down through the mounting ring, thereby the aromatherapy nebulizer is installed externally to the host.

Abstract: A fuel-cell hydrogen recycling system, comprising a fuel cell; a controller; a hydrogen recycling pipeline provided with a hydrogen circulating pump and a check valve; an air inlet pipeline and an air outlet pipeline connected to the fuel cell, respectively; a hydrogen inlet pipeline provided with a hydrogen inlet valve; and a hydrogen outlet pipeline provided with a hydrogen outlet valve, with the hydrogen recycling pipeline connected to the hydrogen inlet pipeline, wherein the system further comprises a gas-liquid separating reservoir, which comprises a reservoir positioned at its upper portion and a gas-liquid separator positioned at its lower portion communicated with each other vertically, the reservoir is connected to the hydrogen outlet pipeline and the hydrogen recycling pipeline, respectively, and the gas-liquid separator discharges exhaust water and redundant nitrogen through a exhaust pipeline that is provided with a ventilation valve.

Abstract: An implantable prosthetic valve assembly, according to one embodiment, comprises a frame assembly including a plurality of struts and a prosthetic valve secured inside the frame assembly by sutures. At least one of the plurality of spaced struts contains at least one hole that passes from one side of the at least one strut to another side of the at least one strut and a recess disposed around the hole.

Abstract: A metallic bipolar plate for a fuel cell includes a cathode plate and an anode plate, each stamped from an individual metal sheet, wherein: the cathode plate and the anode plate are closely combined in a back-to-back manner, and the grooves and ridges at the back sides of the plates are such designed in terms of width, depth and direction that they can form the coolant flow channel directly, the cathode plate and the anode plate are back-to-back combined by a frame-shaped gasket sandwiched between frames of the plates, the grooves and the ridges at the back sides of the two plates, when coupled, jointly form the coolant flow channel having a groove-to-groove or groove-to-ridge structure, thereby constructing the bipolar plate having three flow channels from the two plates, wherein, the frame-shaped gasket only received in the frame-shaped hollow space around the flow field formed between the stamped plates.

Abstract: Provided in the present invention is a solid catalyst component for use in olefin polymerisation, comprising Mg, Ti, a halogen, and at least one electron donor, the electron donor being a 2-substituted amino-phenyl ester compound selected from general formula (I). Also disclosed in the present invention are a catalyst comprising the solid catalyst component, and an application for the catalyst in olefin polymerisation, particularly in propylene polymerization. Also provided in the present invention is a high activity catalyst, said catalyst being able to obtain polypropylene of high isotacticity and wide molecular weight distribution, and not requiring an external electron donor to obtain high isotacticity polypropylene; during polymerization, Al/Ti and Al/Si are reduced, the polymerization time is lengthened, and high activity can still be maintained, suitable for producing low-ash polymers.

Abstract: Provided is an alkoxy magnesium supported olefin polymerization catalyst component, comprising the reaction products of the following components: at least one alkoxy magnesium compound of Mg(OR1?)N(OR2?)2-N, at least one titanium compound of general formula Ti(OR)nX4-n, at least one ortho-phenylene diester electron donor compound a, and at least one diether electron donor compound b, wherein the molar ratio of a to b is 0.05 to 20. The catalyst component has an ultrahigh polymerization activity when used for olefin polymerization, and does not require the use of an external electron donor, but can also obtain a polymer with a high isotacticity, and the resulting polymer has a relatively wide molecular weight distribution and a relatively low ash content.

Abstract: The present application relates to a chip heat dissipating structure, a chip structure, a circuit board and a supercomputing device, and the chip heat dissipating structure includes a metal layer, where the metal layer is covered on the chip. By adding a metal layer on the top of the chip, the heat sink may be soldered onto the metal layer through a solder layer, so that the heat sink is fixed to the top of the chip; the main component of the solder layer is metal tin, and the metal layer has a higher thermal conductivity than an epoxy resin material mounted on a traditional heat sink, thereby solving a problem of the heat dissipation bottleneck of a resin material in the chip, thus improving a heat dissipation effect of the chip and preventing a large amount of heat from damaging the chip.

Abstract: An implantable prosthetic valve assembly, according to one embodiment, comprises a frame assembly including a plurality of struts and a prosthetic valve secured inside the frame assembly by sutures. The sutures are inward of the outermost surface of an outer periphery of the frame assembly. In certain embodiments the struts contain recesses in which sutures can be disposed. In other embodiments, the struts can have holes through them which the sutures pass through. The implantable prosthetic valve assembly can also be collapsed within a catheter such that an outermost surface of a periphery of the frame assembly touches the catheter but the sutures are spaced apart from the catheter or are flush with the outer surface of the frame.

Abstract: A fuel cell system and a method for purge and removing water during its stop and start process, the system comprises a fuel cell stack, an air supply system connected to a cathode at a cathode side of the fuel cell stack, and a hydrogen supply system connected to an anode at an anode side of the fuel cell stack, the air supply system includes an air compressor, an air inlet tube, and an air outlet tube, the air outlet tube is connected to a low-oxygen gas storage tank through a manifold, and the low-oxygen gas storage tank is connected back to the hydrogen supply system through a circulating tube. The method expels standing water from the fuel cell stack using an air compressor to continuously supply air to both the anode side and the cathode side of the fuel cell stack, so as to further protect the stack.

Abstract: A flow field plate for a fuel cell, the flow field plate is provided with a plurality of fluid channels wherein at least one split block is provided between the fluid channels, at least one auxiliary microflow-channel is arranged in the split block, the microflow-channel changes flow rate and flow pressure of fluid at different sites along the fluid channel by having a depth and a width smaller than a depth and a width of the fluid channel at a confluent segment and also smaller than a depth and a width of the fluid channel at a diverging segment, so as to generate a pressure difference that forces fluid to flow into a diffusion layer. The flow field plate adjusts flow rate and pressure of fluid at different sites along the fluid channel, so as to transmit the reaction medium more effectively and removes generated water more effectively.

Abstract: A experimental device is specifically an annular water tank formed by a first arc-shaped water tank, a first special-shaped water tank, a second arc-shaped water tank and a second special-shaped water tank which are sequentially connected head to tail, and the outer perimeter is 70 m to 110 m, wherein the inner walls of both the first special-shaped water tank and the second special-shaped water tank are flat, both of the widths between the outer walls and the inner walls are gradually increased from the two ends to the middle, and water flow pushing equipment which are capable of enabling the maximum water flow velocity in the experimental device to reach a preset value are respectively placed in the first special-shaped water tank and the second special-shaped water tank.

Abstract: A experimental device is specifically an annular water tank formed by a first arc-shaped water tank, a first special-shaped water tank, a second arc-shaped water tank and a second special-shaped water tank which are sequentially connected head to tail, and the outer perimeter is 70 m to 110 m, wherein the inner walls of both the first special-shaped water tank and the second special-shaped water tank are flat, both of the widths between the outer walls and the inner walls are gradually increased from the two ends to the middle, and water flow pushing equipment which are capable of enabling the maximum water flow velocity in the experimental device to reach a preset value are respectively placed in the first special-shaped water tank and the second special-shaped water tank.

Abstract: A method for forming a medical instrument from a mono-crystalline shape memory alloy.