Abstract: Provided is a liquid crystal handwriting board. The liquid crystal handwriting board includes: a liquid crystal panel, a photosensitive assembly, and a control assembly; wherein the liquid crystal panel includes a first substrate and a second substrate that are opposite; the photosensitive assembly includes a plurality of photosensitive elements; and the control assembly is electrically connected to the liquid crystal panel and the photosensitive assembly, and is configured to determine position information of a pixel region for erasure by detecting position information of target light irradiated to the liquid crystal panel by the photosensitive assembly and supply a pixel voltage to the plurality of pixel electrodes in the pixel region for erasure, such that a voltage difference is present between the plurality of pixel electrodes in the pixel region for erasure and the common electrode.

Abstract: Embodiments of the present disclosure provide a display module and a preparation method therefor, and a display apparatus. The display module includes a liquid crystal display panel and a light scattering layer. Among them, the liquid crystal display panel includes a first substrate, a second substrate, and a first liquid crystal layer, the first substrate is disposed opposite to the second substrate, the first liquid crystal layer is located between the first substrate and the second substrate, and the first liquid crystal layer includes a cholesteric liquid crystal configured to have a conical helix texture when an electric field is applied, to reflect light matched with a helical pitch of the conical helix texture; and the light scattering layer is disposed on a side of the liquid crystal display panel and is configured to scatter light reflected by the liquid crystal display panel.

Abstract: A bulk acoustic wave resonator and a preparation method thereof, the bulk acoustic wave resonator includes a first electrode and a second electrode, and a piezoelectric film between the first and second electrodes, the piezoelectric film includes n layers of polarized piezoelectric films, and the polarities of any two adjacent layers of the polarized piezoelectric films are opposite. The acoustic mirror is disposed between the substrate and the first electrode, by preparing the polarized piezoelectric films with opposite polarities in layers, polarity inversion is achieved. The bulk acoustic wave resonator of the present disclosure can reduce the requirements for the piezoelectric film materials and increase the resonant frequency under the condition of not reducing the total thickness of the piezoelectric film or introducing a transition electrode. The process is simplified, the acoustic wave loss is reduced, and the quality factor is improved.

Abstract: The present application relates to a silicone oil-based immersion coolant for an electronic component. The silicone oil-based immersion coolant for an electronic component includes a base oil and an additive. The base oil includes a low-viscosity silicone oil. The additive includes a silicone oil diluent and a thermally conductive inorganic filler. The viscosity of the low-viscosity silicone oil is less than or equal to 1000 cSt. The thermally conductive inorganic filler is an insulating filler. Based on the mass of the immersion coolant, a mass percentage content of the base oil is in a range from 70% to 85%, a mass percentage content of the silicone oil diluent is in a range from 10% to 20%, and a mass percentage content of the thermally conductive inorganic filler is in a range from 5% to 10%.

Abstract: Disclosed is a magnetic pressure retaining control device, which comprises: a valve seat, a magnetic valve cover, and a trigger magnetic member for repelling the magnetic valve cover; the magnetic valve cover and an open end of the valve seat are movably connected; when the magnetic valve cover is in an open state, the trigger magnetic member is opposite to an end surface of the magnetic valve cover away from an inside of the valve seat. A cylindrical magnet is also arranged in the valve seat. By the magnetic between the trigger magnet and the magnetic valve cover, and the magnetic between the magnetic valve cover and the valve seat, a reliable guarantee for the closure between the magnetic valve cover and the valve seat is provided. The valve seat and the valve cover are tightly closed under different conditions.

Abstract: Provided are a 2-(aryl-2-yl) morpholine and a deuterated derivative thereof, a preparation method therefor and an application thereof. In particular, involved are the use of a compound shown by general formula (V) in the treatment of central nervous system diseases, a deuterated compound thereof, a preparation method of deuterated compound, a pharmaceutical composition containing the deuterated compound, and the use thereof as a TAAR1 agonist in the treatment of central nervous system diseases.

Abstract: An internal blowout-prevention gas-retaining connector has a body mounted at the bottom of a drill pipe. The body includes a valve pipe section and a connecting pipe section arranged from top to bottom. The bottom of the valve pipe section is inserted into the top of the connecting pipe section. The blowout-prevention valve seat is provided at a bottom end of the valve pipe section while a blowout-prevention valve bonnet is provided on a bottom surface of the valve pipe section. The edge of the blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section. A torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet. One end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet while the other end is connected to the inner wall of the connecting pipe section.

Abstract: A simulation device for magnetic closing of flap valve is disclosed, which includes a worktable, a driving mechanism for driving the worktable to rotate, a valve seat, a magnetic valve cover movably connected with the valve seat, a first magnet for repelling the magnetic valve cover, a cylinder, a lifting equipment for driving the cylinder to rise and fall. When the cylinder is inserted into the valve seat driven by the lifting equipment, the cylinder prevents the closure of the magnetic valve cover. When the cylinder is out of contact with the magnetic valve cover driven by the lifting equipment, the magnetic valve cover is closed, and the worktable in the simulation device can rotate and turn over, so that the closing process of flap valve (valve seat and valve cover) in any direction of deep drilling coring under the action of magnetic force is simulated.

Abstract: A method for micro-ridge mixed-sowing cultivation of rice includes: S1: draining away water at the maturity stage of the preceding crop until reaching a state allowing a harvester to operate; S2: harvesting the preceding crop, leaving the stubble, smashing the stalks of the preceding crop, and then spreading the smashed stalks on the stubble to form a rhizosphere layer for rice growth; S3: trenching the field to form ecological trenches; S4: flattening the standing stubble and the smashed stalks on the seedbed surface to form an underlying surface, molding seed-fertilizer-soil compounds into a ridge shape and fall the seed-fertilizer-soil compounds on the underlying surface to form ecological ridges, wherein a plurality of ecological ridges are formed between adjacent ecological trenches, and the seed-fertilizer-soil compounds are obtained by thoroughly mixing rice seeds, chemical fertilizers and soil at a mass ratio of 6 to 14:50 to 70:6,000 to 10,000.

Abstract: The present disclosure provides a heat dissipation device of an energy storage system and a heat dissipation method for an energy storage system, wherein the heat dissipation device comprises: a housing, wherein at least one frame is provided in the housing, the energy storage system is placed in the at least one frame, a curved-surface guide plate is provided on the top of the at least one frame, at least one air conditioner is hung outside the housing, a cold air outlet of each air conditioner is connected to the curved-surface guide plate; a guide cavity is formed between a concave surface of the curved-surface guide plate and the at least one frame, a spreader plate is provided in the guide cavity, and the spreader plate is configured to adjust a flow direction of gas in the guide cavity.

Abstract: A display substrate, a manufacturing method thereof and a display device. The display substrate includes a base substrate, a pixel driving circuit layer and an antenna layer, wherein the pixel driving circuit layer is arranged on the base substrate and includes a thin film transistor and a plurality of signal lines, and the antenna layer is arranged on a side of the pixel driving circuit layer far away from the pixel driving circuit layer and includes a first antenna arranging region including a first antenna network formed by a plurality of first antenna lines.

Abstract: The presently disclosed subject matter relates to devices, systems, and methods for fabricating a solid polymer electrolyte electrode assembly are provided. One or more electrode for a solid polymer electrolyte electrode assembly includes a porous substrate configured as a liquid/gas diffusion layer and an ionomer-free catalyst coated on the substrate.

Abstract: A display panel including: a first substrate and a second substrate disposed oppositely and a liquid crystal layer disposed between the first substrate and the second substrate; a material of the liquid crystal layer includes a cholesteric liquid crystal; the display panel further includes: a microstructure optical film layer located on a side of the second substrate facing away from the first substrate; incident light is incident from a side of the microstructure optical film layer, reflected by the cholesteric liquid crystal, and then emerged from the microstructure optical film layer; the microstructure optical film layer includes multiple wedge structures; at least part of the wedge structures have different angles and sizes, so that light emerged from side view angles with different emergent angles are adjusted to a center view angle.

Abstract: A method for extracting web page content in a terminal device, where a system service in a framework of an operating system drives a web page display component execution environment to complete a control layout and control rendering on a user interface of an application program, where a web page display component is identified from a view control included in the user interface, and then instructions for content extraction and instructions for information feedback are inserted, through an interface of the identified web page display component, into a web page embedded in the user interface of the application program. The instructions for content extraction extract content at a specified location on the web page based on a custom web event, and the instructions for information feedback transfer the extracted web page content to the operating system.

Abstract: The present disclosure belongs to the technical field of display, and provides an array substrate, a handwriting tablet, a tablet eraser, a handwriting tablet system and a method for erasing a pattern. The array substrate is provided with a handwriting area, and a peripheral area surrounding the handwriting area. The array substrate includes erasing electrodes, which are arranged in an array, and a driving circuit for driving the erasing electrodes, wherein the driving circuit is configured to load, under the irradiation of preset light, an erasing voltage to the erasing electrodes. The array substrate is further provided with an NFC coil, which is used for sending an NFC signal, wherein a sensing range of the NFC coil covers the handwriting area.

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: Provided is a liquid crystal handwriting board. The liquid crystal handwriting board includes a first substrate, a second substrate, a third substrate, a first liquid crystal layer, and a second liquid crystal layer; wherein the first substrate includes: a first base, and a first pixel electrode and a transparent electrode, wherein the first pixel electrode is insulated from the transparent electrode, and the first pixel electrode is closer to the second substrate than the transparent electrode is; wherein the first substrate, the first liquid crystal layer and the second substrate are configured to form a display portion of the liquid crystal handwriting board; and the first substrate, the second liquid crystal layer and the third substrate are configured to form a writing portion of the liquid crystal handwriting board.

Abstract: The invention discloses a display substrate, a display panel and a display device.

Abstract: A display panel includes a liquid crystal cell, a first polarizing assembly and a second polarizing assembly. The liquid crystal cell includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate. The first polarizing assembly is disposed on a side of the first substrate further away from the liquid crystal layer and includes at least a first polarizing layer having a first transmission axis, and the first polarizing assembly is configured for generating polarized light whose polarization direction is parallel to the first transmission axis. The second polarizing assembly is located on a side of the second substrate further away from the liquid crystal layer and includes at least a transflective layer and a light absorbing layer.

Abstract: An impact power tool includes a motor, an output shaft to which a tool bit is attachable for performing work on a workpiece, and an impact mechanism disposed between the motor and the output shaft for converting a continuous torque output from the motor to discrete pulses of torque upon the output shaft, the impact mechanism including a cylinder assembly, a cavity defined within the cylinder assembly containing a hydraulic fluid, and a collapsible member having a first end and a second end opposite the first end. The collapsible member is maintained in a shape coinciding with that of the cavity by fitment within the cavity, with the first and second ends being disconnected from each other. The collapsible member is collapsible to compensate for thermal expansion of the hydraulic fluid during operation of the impact mechanism.