Abstract: One or more embodiments of this specification provide a method for assisting a card reader in card searching, a card searching method, and an NFC tag. The method includes: performing signal detection within a predetermined detection range; generating an excitation signal in a case that a low power card detection (LPCD) signal is detected, where the LPCD signal is sent by a card reader device in a low power card detection mode; and sending the excitation signal, so the card reader device switches from the low power card detection mode to a normal card searching mode.

Abstract: A microcapsule containing vitamin C and nitrate, said capsule comprising a wall material and a core material encapsulated in the wall material. The wall material comprises pectin and sodium carboxymethyl cellulose, and the core material comprises vitamin C, nitrate, and chitosan. The raw materials of the microcapsule comprise, in parts by weight: pectin 0.7-1.2 parts by weight, sodium carboxymethyl cellulose 0.7-1.2 parts by weight, chitosan 1 part by weight, and vitamin C and nitrate in a total amount of 0.3-1.2 parts by weight, the molar ratio of vitamin C to nitrate ions being 1:1-1:5. A use of the microcapsule in the preparation of a drug for preventing and/or treating damage to the salivary glands caused by radiation therapy, in particular a use in the preparation of a drug for preventing and/or treating damage to the salivary glands caused by radiation therapy for nasopharyngeal carcinoma.

Abstract: The invention relates to the technical field of membrane separation, and discloses a hollow fiber membrane and preparation method and use thereof. The hollow fiber membrane includes a support, a selective layer, and a transition layer between the support and the selective layer, wherein at least a portion of the transition layer is embedded in the support. The hollow fiber membrane has a high selectivity and good mechanical properties.

Abstract: Disclosed in the present invention is a water filling and drainage test device and method for a prefabricated crack-containing reinforced concrete lining pressure tunnel. The test device comprises a cylindrical barrel, a reinforced concrete lining containing prefabricated cracks, surrounding rock, geotechnical cloth, a front flange, a rear flange, and a monitoring instrument. The surrounding rock is proximate to an inner wall of the cylindrical barrel, and the reinforced concrete lining containing the prefabricated cracks is inside of the surrounding rock; and the front flange and the rear flange are fixed at two ends of the cylindrical barrel. The test device is used for carrying out a water filling and drainage test on the pressure tunnel, and observing the change in the width of the prefabricated cracks and the conditions of the pressure tunnel.

Abstract: The present disclosure provides a projector. The projector includes a light source, a display panel, a first lens and a projection lens. The projector is configured such that the light emitted by the light source can sequentially pass through the display panel, the first lens, the projection lens and then exit. The projector includes a system optical axis, and the optical axis of the display panel coincides with the system optical axis; the optical axis of the projection lens is arranged parallel to the system optical axis with a distance therefrom.

Abstract: Provided is a recombinant fusion protein comprising (a) an anti-CD40 antibody or an antigen binding portion thereof comprising a heavy chain variable region and a light chain variable region, and (b) a CD47 binding domain. Provided is a nucleic acid molecule encoding the recombinant fusion protein, a vector comprising said nucleic acid and a host cell transformed or transfected with said vector or with such a nucleic acid. Furthermore, provided is a process for the production of said recombinant fusion protein, a medical use of said recombinant fusion protein and a kit comprising said recombinant fusion protein.

Abstract: The present disclosure provides a projection device, including: a housing, a light source component, and a projection lens; an accommodating space is formed inside the projection device; the projection device further includes a second mirror, a second fan and a lens component in the accommodating space; the second mirror is arranged on a light outgoing side of the light source component and is configured to reflect light emitted from the light source component into the lens component, and the lens component is configured to collimate light; the accommodating space includes an air flowing space including a first subspace and a second subspace; the first subspace is defined by the light source component, the second mirror, the lens component and a part of the housing, and the second subspace is around the first subspace; the second fan is configured to promote internal air within the air flowing space to circulate.

Abstract: A communication method for an off-road vehicle group is applied to a first portable communication device. The first portable communication device includes a short-range communication module and a long-range communication module, both sending and receiving unlicensed transmissions, as well as a positioning module such as a GPS chip.

Abstract: A graphitization furnace includes a furnace body, an upper lining, an insulating lining, a lower lining, a positive electrode and a negative electrode. The upper lining, the insulating lining and the lower lining are all disposed as attached to an inner wall of the furnace body, and the upper lining, the insulating lining and the lower lining sequentially abut against one another along a direction from top to bottom, and the upper lining, the insulating lining and the lower lining are all substantially provided with first through holes with a common axis. The positive electrode is substantially disposed vertically, a lower end of the positive electrode is disposed within the upper lining, the negative electrode is substantially disposed horizontally, and a middle part of the negative electrode is provided with a second through hole for passing raw ingredients.

Abstract: The application discloses a display module and a projector. The display module includes a light source, a first lens, a second lens, and a display panel, wherein the light source includes a light-emitting area, the display panel includes a display area, the light source emits a first light beam through the light-emitting area, the first lens refracts the first light beam into a second light beam, the second lens refracts the second light beam into a third light beam. The plane where the light-incident surface of the display panel is located includes a first irradiation area, and the first irradiation area includes a first effective irradiation area that is continuously distributed, the first effective irradiation area includes a strongest illumination position therein. The illumination intensity on the outer contour of the first effective irradiation area is I % of the strongest illumination position, I?45.

Abstract: Provided are an anti-CD40 antibody and a use thereof, such as a mouse, human, chimeric, or humanized antibody specifically binding to CD40, and an antigen-binding fragment thereof, and further provided are a nucleic acid molecule encoding the antibody or the antigen-binding fragment thereof, and an expression vector and a host cell for expressing the antibody or the antigen-binding fragment thereof. Further provided are a preparation method and a use method for the antibody or the antigen-binding fragment thereof, comprising treating and preventing immune diseases.

Abstract: A projection apparatus including: a light source component; a light polarization component for converting light from the light source component into first polarized light in a first polarization direction; a display panel on a side, away from the light source component, of the light polarization component for adjusting the polarization direction of the first polarized light to emit second polarized light in a polarization direction between the first polarization direction and a second polarization direction, the first polarization direction is perpendicular to the second polarization direction; a light reflective component on a side, away from the light polarization component, of the display panel for reflecting one of the polarized light in the first polarization direction and the polarized light in the second polarization direction; a projection lens, a light incident surface of which faces the light reflective component so as to receive light reflected by the light reflective component.

Abstract: Disclosed is the use of a nitrate and vitamin C microcapsule in the preparation of a drug for treating sicca syndrome. The microcapsule comprises a wall material and a core material encapsulated in the wall material, wherein the core material comprises vitamin C and nitrate, and a molar ratio of nitrate ions to vitamin C is 1:1 to 5:1.

Abstract: A polyimide random copolymer has a structure represented by formula (I). A method for preparing the polyimide random copolymer, a membrane made of the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane are also provided. A system for purifying helium gas and a method for purifying helium gas are related to the membrane made of the polyimide random copolymer.

Abstract: There is provided a projection apparatus, including: a light emitting component configured to generate light; a liquid crystal display panel on a light outgoing side of the light emitting component and including a liquid crystal layer between a first substrate and a second substrate, the liquid crystal layer including cholesteric liquid crystals configured to be in a conical helix texture under an electric field applied, so as to reflect light matched with a helix pitch of the conical helix texture; an optical component between the light emitting component and the liquid crystal display panel, and configured to adjust a propagation direction of light, an acute angle being formed between an optical axis of the optical component and a normal of the liquid crystal display panel; and a projection lens configured to receive and project the light reflected by the liquid crystal display panel. A display system is further provided.

Abstract: A method, a system, and a non-transitory computer-readable medium for controlling flammability of a fuel. The method includes applying a voltage across a nonvolatile ionic liquid to convert the nonvolatile ionic liquid into a flammable liquid; and removing the applied voltage across the nonvolatile ionic liquid to revert the flammable liquid back to the nonvolatile ionic liquid.

Abstract: Provided are a quinazoline compound and an application thereof. Specifically provided is a quinazoline compound as shown in formula I. The compound is novel in structure and has a good inhibitory effect on cell factors TNF-?, IL-6, and IL-I?.

Abstract: The disclosure provides techniques for map optimization for a localization and mapping system. The map optimization method includes segmenting, based on a preset segmentation condition, a trajectory tracked by the localization and mapping system to obtain a plurality of segments of the trajectory, each segment being partitioned into a head part, an interior part and a tail part; performing a global optimization process based on frames in the head and tail parts of each segment to obtain optimized mapping results for the frames in the head and tail parts of the segment; estimating optimized mapping results for frames in the interior part of each segment based on the optimized mapping results for the frames in the head and tail parts of the segment; and updating a map built by the localization and mapping system according to the optimized mapping results for the frames in each segment.

Abstract: A backlight module and a display device are disclosed. The backlight module includes: a light guide plate, a first bottom surface of the light guide plate being provided with a plurality of dot structures, and the dot structure including a first inclined surface forming a first included angle with the first bottom surface; a backlight source located on a side of a light incident surface, light emitted by the backlight source being incident to the first inclined surface, and an included angle between the emitted light and a horizontal line being a second included angle; and a first prism layer located on the side of a light exiting surface of the light guide plate, the first prism layer having a plurality of first prisms provided in parallel with the light incident surface.

Abstract: The present disclosure provides a carbide refining method of a high-carbon high-alloy steel. The carbide refining method of a high-carbon high-alloy steel includes the following steps: formulating a raw material according to chemical element compositions of the high-carbon high-alloy steel, and smelting to obtain a high-carbon high-alloy molten steel; performing an overheat treatment on the high-carbon high-alloy molten steel to Tm+(50˜100)° C., to obtain a high-carbon high-alloy melt, and making the high-carbon high-alloy melt to be deposited in a preset water-cooled copper mold at a speed of 30˜160 g/s by an inert gas, to obtain a high-carbon high-alloy billet through solidification molding; and performing a heat treatment process on the high-carbon high-alloy billet.