Abstract: The application provides an LED display screen box, comprising a box frame, an LED module and a sheet metal door panel; the LED module comprises a mounting plate, an LED lamp panel and a power box, the LED module is fixed on the front of the box frame by a module side lock; the power box of LED module includes a socket and a protective cover. The LED module can be removed from the front of the box frame, so that the connection stability is ensured and the disassembly can be performed from the front. The LED display screen box can be repaired or changed efficiently and quickly, so the problem that the LED display screen box is difficult to maintain is solved. The protective cover on the power box of LED module can improve the waterproof performance of the power box, its waterproof grade can reach IP65.

Abstract: A UV-curable and recyclable thermoset shape memory polymer is provided. The polymer includes a vitrimer-based monomer and a photoinitiator. The vitrimer-based monomer includes a first unit rendering a high chain stiffness upon polymerization of the monomer, and a second photopolymerizable unit for photopolymerization of the monomer under a UV irradiation. The polymer has high strength, high stiffness, high recovery stress, high energy storage, reasonable recycling efficiency, and is printable using SLA with high resolution.

Abstract: Provided is a locking device, comprising a first lock body and a second lock body; the first lock body comprises an angle rotating disc base (11), an angle rotating disc (12) and a lock plate (13), the angle rotating disc (12) can rotate around its own axis and the angle rotating disc base (11) has a first mounting surface; the second lock body comprises a fixed base (21) and a spring lock (22), the fixed base (21) is provided with a second mounting surface, and a limit surface facing one end face of the angle rotating disc (12); one end face of the angle rotating disc (12) facing the limit surface is provided with a plurality of bevels (121) at intervals along circumferential direction; rotating the angle rotating disc (12) can make the limit surface fit with different bevels (121) to adjust the included angle.

Abstract: Provided is a method for altering properties of tension programmed fibrous shape memory polymer. The method can include applying a protective coating to the tension programmed shape memory polymer, then applying a supportive coating to the tension programmed shape memory polymer to form a coated fiber. The protective coating avoids contact between the shape memory polymer and chemicals used in the supportive coating that can decompensate the shape memory polymer.

Abstract: An InN nanorod epitaxial wafer grown on an aluminum foil substrate (1) sequentially comprises the aluminum foil substrate (1), an amorphous aluminum oxide layer (2), an AlN layer (3) and an InN nanorod layer, (4) from bottom to top. The wafer can be prepared by pretreating the aluminum foil substrate with an oxidized surface and carrying out an in-situ annealing treatment; then, in a molecular beam epitaxial growth process, forming AlN nucleation sites on the annealed aluminum foil substrate, nucleating on the AlN and growing InN nanorods on the AlN, where the substrate temperature is 400-700° C., the pressure of a reaction chamber is 4.0-10.0×10?5 Torr and the beam ratio of V/III is 20-40.

Abstract: Provided herein are high-temperature shape memory photopolymers (HTSMP) and methods of making. The HTSMP has flame retardance and recovery stress of greater than 30 MPa. The HTSMP is formed from a polyacrylate and about 5 wt % to 15 wt % of a phosphorus containing photo-initiator (TPO), wherein the polyacrylate is polymerized by UV exposure of an acrylate monomer and the TPO.

Abstract: The present invention provides a GaN/two-dimensional AlN heterojunction rectifier on a silicon substrate and a preparation method therefor and belongs to the field of rectifiers. The rectifier comprises a silicon substrate, a GaN buffer layer, a carbon-doped semi-insulating GaN layer, a two-dimensional AlN layer, a non-doped GaN layer, a non-doped InGaN layer and a SiNx passivation layer that are stacked in sequence. The rectifier further comprises a mesa isolation groove and a Schottky contact electrode that are arranged at one side. The mesa isolation groove is in contact with the non-doped GaN layer, the non-doped InGaN layer, the SiNx passivation layer and the Schottky contact electrode. The Schottky contact electrode is in contact with the mesa isolation groove and the non-doped GaN layer. The thickness of the two-dimensional AlN layer is only several atomic layers, thus the received stress and polarization intensity are greater than those of the AlGaN layer.

Abstract: A pin-type connection apparatus includes a first connecting seat, a second connecting seat, a connecting shaft, and a locking component, wherein a receiving hole and a locking hole on the adjacent side of the receiving hole are disposed on the second connecting seat, one end of the connecting shaft is fastened to the first connecting seat, a clamping hole is disposed at the other end of the connecting shaft, the connecting shaft can extend into the receiving hole, a first clamping protrusion is disposed in the clamping hole, a second clamping protrusion is disposed at one end of the locking component, and the locking component can pass through the locking hole and extend into the clamping hole; and when the locking component is rotated to a lockout position, the first clamping protrusion can abut against the second clamping protrusion and restrain the second clamping protrusion from exiting the clamping hole.

Abstract: A UV-curable and recyclable thermoset shape memory polymer is provided. The polymer includes a vitrimer-based monomer and a photoinitiator. The vitrimer-based monomer includes a first unit rendering a high chain stiffness upon polymerization of the monomer, and a second photopolymerizable unit for photopolymerization of the monomer under a UV irradiation. The polymer has high strength, high stiffness, high recovery stress, high energy storage, reasonable recycling efficiency, and is printable using SLA with high resolution.

Abstract: The application provides an LED display screen box, comprising a box frame, an LED module and a sheet metal door panel; the LED module comprises a mounting plate, an LED lamp panel and a power box, the LED module is fixed on the front of the box frame by a module side lock; the power box of LED module includes a socket and a protective cover. The LED module can be removed from the front of the box frame, so that the connection stability is ensured and the disassembly can be performed from the front. The LED display screen box can be repaired or changed efficiently and quickly, so the problem that the LED display screen box is difficult to maintain is solved. The protective cover on the power box of LED module can improve the waterproof performance of the power box, its waterproof grade can reach IP65.

Abstract: An InGaN/GaN multiple quantum well blue light detector combined with embedded electrode and passivation layer structure and a preparation method and an application thereof are provided. The detector includes: a Si substrate, an AlN/AlGaN/GaN buffer layer, a u-GaN/AlN/u-GaN/SiNx/u-GaN buffer layer, an n-GaN buffer layer, an InGaN/GaN superlattice layer and an InGaN/GaN multiple quantum well layer in sequence from bottom to top. The multiple quantum well layer has a groove structure, a mesa and a groove of the multiple quantum well layer are provided with a Si3N4 passivation layer. The passivation layer in the groove is provided with a first metal layer electrode with a semicircular cross section, and the passivation layer on the mesa is provided with second metal layer electrode.

Abstract: Provided is a control device for floor tile screen, which comprises a sensor chip, switch module, signal processing module and light panel control module connected; wherein a plurality of sensor chips are arranged, and the plurality of sensor chips are arranged on each light panel, the light panel control module is connected with the light panel; the sensor chip is used for generating a contact signal; the switch module is used for switching the contact signal received by each sensor chip; the signal processing module is used for receiving, buffering and identifying the contact signal so as to generate an aggregated signal containing position and contact state of each sensor chip; the light panel control module is used for controlling each light panel to display visuals; and a light panel control circuit is formed by the plurality of sensor chips, switch module, signal processing module and light panel control module.

Abstract: The application belongs to the technical field of LED display screens, and particularly relates to an outdoor LED display. The Outdoor LED display comprises a box body, a display module and a plurality of control assemblies; the display module comprises a plurality of sub-modules, and each sub-module is provided with a control assembly; the box body comprises a frame and a panel installed on the frame, and the display module is connected at one end of the frame away from the panel; the panel, the frame, and the display module form an installation space for installing the control assembly. In this application, each sub-module is installed with a corresponding control assembly, and the control assembly can control the corresponding sub-module to display, thereby enhancing the display effect of the outdoor LED display.

Abstract: Provided is a locking device, comprising a first lock body and a second lock body; the first lock body comprises an angle rotating disc base (11), an angle rotating disc (12) and a lock plate (13), the angle rotating disc (12) can rotate around its own axis and the angle rotating disc base (11) has a first mounting surface; the second lock body comprises a fixed base (21) and a spring lock (22), the fixed base (21) is provided with a second mounting surface, and a limit surface facing one end face of the angle rotating disc (12); one end face of the angle rotating disc (12) facing the limit surface is provided with a plurality of bevels (121) at intervals along circumferential direction; rotating the angle rotating disc (12) can make the limit surface fit with different bevels (121) to adjust the included angle.

Abstract: A composition comprising thermoset polymer, shape memory polymer to facilitate macro scale damage closure, and a means for molecular scale healing is disclosed; the composition has the ability to resolve structural defects by a bio-mimetic close-then heal process. In use, the shape memory polymer serves to bring surfaces of a structural defect into approximation, whereafter use of the means for molecular scale healing allowed for movement of the healing means into the defect and thus obtain molecular scale healing. The means for molecular scale healing can be a thermoplastic such as fibers, particles or spheres which are used by heating to a level at or above the thermoplastic's melting point, then cooling of the composition below the melting temperature of the thermoplastic. Compositions of the invention have the ability to not only close macroscopic defects, but also to do so repeatedly even if another wound/damage occurs in a previously healed/repaired area.

Abstract: The application provides a floor tile screen, comprising a box body (1), a rear body (2), a PCB board (3) and a front body (4), wherein the rear body (2) is fixed on the box body (1); the PCB (3) is arranged between the rear body (2) and the front body (4), and provided with lamp beads; a plurality of transparent fixing columns (41) are fixedly arranged on the front body (4), pass through the PCB board (3), fixedly connected with the rear body (2), and avoid the lamp beads. The fixing column (41) has the function of limiting the front body (4), the front body (4) and the rear body (2) are connected together by fixing columns (41), to avoid separation; the fixing columns (41) are transparent, so that the light emitted by the lamp beads is not blocked, the display effect of the floor tile screen is improved.

Abstract: In one aspect, the disclosure relates to free-standing artificial muscles having a polymeric core encased by an elastic spring. The polymeric core can be any two-way shape memory polymer including, but not limited to, a semicrystalline polymer (polybutadiene polymer, a polycaprolactone polymer, a poly(ethylene-co-vinyl acetate)), a rubber, an ionomer, an elastomer, or a gel. In some aspects, the shape memory polymers are crosslinked. In an alternative aspect, the polymeric core is a twisted and coiled polymeric fiber. In other aspects, the polymeric core is reprocessable, remoldable, and/or recyclable. In one aspect, the elastic spring is metallic, ceramic, plastic, or any combination thereof. The stiffnesses or spring rate of the elastic spring and polymeric core, the two-way shape memory effect of the polymeric core, and their geometrical dimensions can be optimized to maximize the actuation strain based on theoretical principles described herein.

Abstract: A quick application startup method and a related apparatus are provided. The method includes: An electronic device requests an acceleration script of one or more quick applications from an application server. A first operation for a target quick application is detected. In response to the first operation, the electronic device requests an application package of the target quick application from the application server. An acceleration script of the target quick application is included in the acceleration script of the one or more quick applications. In response to the first operation, the electronic device runs the acceleration script of the target quick application to obtain a first URL, and obtains first data based on the first URL. The electronic device may generate and display a first screen of the target quick application based on the first data.

Abstract: Provided is an anti-collision device for LED screen, comprising a box body (1), a telescopic rotating mechanism, an anti-collision sheet (4) and a display module (2); the peripheral side of the box body (1) is provided with a mounting hole (12) and a receiving groove (11); the telescopic rotating mechanism is embedded in the mounting hole (12) and movably connected with the box body (1); the anti-collision sheet (4) is fixedly connected with the telescopic rotating mechanism. When the telescopic rotating mechanism is not subjected to external force, the telescopic rotating mechanism enables the anti-collision sheet (4) to shield the peripheral side of the display module (2) outside the receiving groove (11); when the telescopic rotating mechanism is subjected to external force, the telescopic rotating mechanism drives the anti-collision sheet (4) to retract and rotate to be embedded in the receiving groove (11).

Abstract: A composition for sealing defects in structural materials such as roads or paved surfaces, the composition preferably comprising one or more shape memory polymer (SMP) components capable of responding to increased temperature by decreasing in volume.