Abstract: A hot bed deformation tolerance structure for a large-sized continuous fiber high-temperature 3D printer is provided. Size changes caused by thermal expansion of a hot bed are compensated through motion coordination of a secured hot bed support assembly and a motion device, especially for an aluminum alloy material. A Z-direction motion structure of this structure is fixedly mounted with a frame and works at room temperature. A compensation motion module is fixedly mounted with a Z axis and incompletely secured with the hot bed support assembly, and works at room temperature with the Z axis. The hot bed support assembly is incompletely secured and partially in a high-temperature chamber, with a maximum working temperature of 300° C. The hot bed support assembly retains motion redundancy in a direction of thermal expansion deformation, tolerates thermal deformation through a linear motion module, and compensates for metal deformation through horizontal motion coordination.

Abstract: Provided are a battery winding method, a battery winding system, a battery and an electrical device. The battery winding method includes: winding; photographing a picture of a current winding layer; acquiring position data of a first point and of a second point according to the picture of the current winding layer, converting the position data of the first point to obtain the converted position data of a converted first point using a preset conversion matrix corresponding to the current winding layer based on the number of the current winding layers and calculating data of displacement between the first and second electrode plates based on the converted position data of the converted first point and the position data of the second point, and determining if the data of displacement is within a threshold value scope, if so, returning to wind a next winding layer, and if not, sending an alarm.

Abstract: A light-emitting device includes an epitaxial structure having a first surface and a second surface that is opposite to the first surface. The epitaxial structure includes, along a first direction from the first surface to the surface, a first-type semiconductor layer, an active layer, and a second-type semiconductor layer including a capping layer. The capping layer includes at least Ni number of sub-layers arranged in the first direction, where N1?2. Each of the sub-layers of the capping layer contains a material represented by Aly1Ga1-y1InP, where 0<y1?1. The capping layer has an Al content which increases and then remains constant along the first direction. A light-emitting apparatus includes the light-emitting device is also provided.

Abstract: The present disclosure provides an ecological governance method based on erosion prevention and control for a gentle slope farmland and relates to the technical field of ecological governance of farmlands. The ecological governance method based on erosion prevention and control for a gentle slope farmland includes the following steps: sampling a gentle slope farmland to investigate erosion thereof; and determining erosion of a gentle slope cultivated land and selecting a corresponding recovery strategy based on a detection result of a sample, a soil quality index (SQI), and a comprehensive vegetation quality index (VQI), where the recovery strategy includes a natural recovery method and a biological-farming comprehensive recovery method; enclosing the gentle slope cultivated land, fallowing the gentle slope cultivated land and reducing tillage; exterminating insect pests and poisonous weeds in the enclosed area; and turning over straws under soil by a cultivator. The growth of poisonous weeds is inhibited.

Abstract: The invention discloses a light-emitting diode and a light-emitting device. The light-emitting diode includes a semiconductor epitaxial stack having first and second surfaces opposite to each other and including a first-type semiconductor layer, an active layer, and a second-type semiconductor layer stacked in sequence in a direction from the first surface to the second surface. The active layer includes n periods of quantum well structure, and each period of quantum well structure includes a well layer and a barrier layer deposited sequentially. A first spacer layer is disposed between the first-type semiconductor layer and the active layer, and a ratio of a thickness (nm) of the first spacer layer to a current density (A/cm2) of the light-emitting diode ranges from 0 to 10. In the invention, the thickness of the first spacer layer is adjusted according to the current density of the light-emitting diode to improve the luminous efficiency of the light-emitting diode.

Abstract: A wire feeding mechanism suitable for fused deposition Additive Manufacturing (AM) of a flexible wire is provided, which includes a support housing. A melting nozzle is arranged at the lower end of the support housing, a hook is connected to the inner wall of the top end of the support housing, a connecting rod is connected to the inner wall of one side of the support housing, a wire drawing mechanism is connected to one end of the connecting rod, the wire drawing mechanism is located at the lower end of the hook, a limiting mechanism and a wire guide mechanism are connected to the inner wall of one side of the support housing, the limiting mechanism is located at the lower end of the wire drawing mechanism, the wire guide mechanism is located at the lower end of the limiting mechanism.

Abstract: An additive manufacturing device for an aerospace truss includes a raw material input unit, a longitudinal beam forming unit, a longitudinal beam traction unit, a cross beam forming unit and a truss support unit. The raw material input unit stores pre-impregnated wires and pre-impregnated tapes, and a motor drives rollers to convey the pre-impregnated wires and the pre-impregnated tapes forward; the longitudinal beam forming unit is composed of three sets of forming molds, and the pre-impregnated tapes form V-shaped longitudinal beams through heating molds; a stepper motor used in the longitudinal beam traction unit drives three sets of roller traction devices through steering gears to pull formed longitudinal beams; the cross beam forming unit is composed of a motion module and a printing module, and a truss cross beam is printed through a 3D printing method of molten deposition.

Abstract: A light-emitting device includes a semiconductor epitaxial structure that has a first surface and a second surface, and that includes a first semiconductor layer, an active layer, and a second semiconductor layer. The active layer includes a quantum well structure having multiple periodic units, each including a well layer and a barrier layer greater in bandgap than the well layer. The bandgap of the barrier layer of at least one of the periodic units proximate to the first surface is smaller than that proximate to the second surface, and a thickness of the well layer of at least one of the periodic units proximate to the first surface is greater than that proximate to the second surface. In some embodiments, a bandgap of a second spacing layer disposed between the active and second semiconductor layers increases in a direction from the first surface to the second surface.

Abstract: Disclosed are embodiments that communicate label information for documents between two enterprise computer systems. The two computer systems operate asynchronous from each other, and have limited available resources for use in buffering information passing between them. To that end, traditional API architectures that utilize method calls and return parameters do not operate well in this environment, as a first computer systems resources can become exhausted if a second computer system is able to generate data faster than the first computer system can consume it. The problem is exacerbated if an error is experienced when processing the consumed data, especially if there are no resources available to store the data until the error can be cleared. To solve this problem, the disclosed embodiments provide an ability for a consumer to request that data previously delivered to it be delivered again by the producer, in some embodiments, after a specified time delay.

Abstract: The disclosure discloses a nickel cobalt lithium manganate cathode material, a preparation method thereof and a lithium ion battery. The nickel cobalt lithium manganate includes a core and an outer layer covering the outside of the core, the core comprises flaky particles, a D50 particle diameter of the flaky particles in the core is 5-10 ?m, and a D50 particle diameter of particles in the outer layer is 0.1-4.5 ?m.

Abstract: The disclosure discloses a nickel cobalt manganese hydroxide, a cathode material, a preparation method thereof and a lithium ion battery. The nickel cobalt manganese hydroxide comprises a core and an outer layer covering the outside of the core. The core comprises flaky particles, the D50 particle diameter of the flaky particles in the core is 5-8 ?m, and the D50 particle diameter of particles in the outer layer is 0.1-5 ?m.

Abstract: The invention provides a nanomaterial of polyglycerol grafted cellulose nanocrystal dendrimer and a preparation method thereof. In the present invention, the cotton linter pulp is pulverized into flocculent fibers, fed to sulfuric acid, and reacted. After centrifugation, dialysis and ultrasonic cell disruption, cellulose nanocrystals are obtained. Carboxylated cellulose nanocrystals are further obtained after oxidation with TEMPO, dialysis, and freeze-drying. The carboxylated nanocrystals are further added to DMF, and under a nitrogen atmosphere, glycidol is grafted to the hydroxyl groups on the surface by heating with stirring. After the reaction is completed, the product is centrifuged, dried under vacuum, dialyzed, and freeze dried to obtain a nanomaterial of primary polyglycerol grafted cellulose nanocrystals.

Abstract: Disclosed are embodiments that communicate label information for documents between two enterprise computer systems. The two computer systems operate asynchronous from each other, and have limited available resources for use in buffering information passing between them. To that end, traditional API architectures that utilize method calls and return parameters do not operate well in this environment, as a first computer systems resources can become exhausted if a second computer system is able to generate data faster than the first computer system can consume it. The problem is exacerbated if an error is experienced when processing the consumed data, especially if there are no resources available to store the data until the error can be cleared. To solve this problem, the disclosed embodiments provide an ability for a consumer to request that data previously delivered to it be delivered again by the producer, in some embodiments, after a specified time delay.

Abstract: A light-emitting device includes a semiconductor epitaxial structure that has a first surface and a second surface opposite to the first surface, and that includes a first semiconductor layer, an active layer, and a second semiconductor layer sequentially stacked on one another in such order from the first surface to the second surface. The active layer includes a quantum well structure having multiple periodic units each of which includes a well layer and a barrier layer disposed sequentially in such order. A bandgap of the barrier layer is greater than that of the well layer, and the bandgaps of the barrier layers gradually increase in a direction from the first surface of the semiconductor epitaxial structure to the second surface of the semiconductor epitaxial structure.

Abstract: The invention provides a nanomaterial of polyglycerol grafted cellulose nanocrystal dendrimer and a preparation method thereof. In the present invention, the cotton linter pulp is pulverized into flocculent fibers, fed to sulfuric acid, and reacted. After centrifugation, dialysis and ultrasonic cell disruption, cellulose nanocrystals are obtained. Carboxylated cellulose nanocrystals are further obtained after oxidation with TEMPO, dialysis, and freeze-drying. The carboxylated nanocrystals are further added to DMF, and under a nitrogen atmosphere, glycidol is grafted to the hydroxyl groups on the surface by heating with stirring. After the reaction is completed, the product is centrifuged, dried under vacuum, dialyzed, and freeze dried to obtain a nanomaterial of primary polyglycerol grafted cellulose nanocrystals.

Abstract: The invention relates to a system for reducing the hardness of a water body. According to the system, the acidic water body near a filter element anode is continuously extracted in the electrolytic process, the effect of acid-alkali separation can be achieved without internally disposing an ion exchange membrane, acid-alkali mixing generated by electrodes slows down, the alkaline atmosphere of a cathode chamber is kept, and a good environment is provided for generation of calcium carbonate seed crystals; and meanwhile, the acidic water body extracted near the anode of an electrochemical electrolysis unit can be used for regenerating ion exchange resin in an ion exchange column, so that resources are fully utilized.

Abstract: A light emitting assembly includes a micro-LED, and a supporting substrate, The micro-LED includes a semiconductor structure and a first insulating dielectric layer. The semiconductor structure includes a first-type semiconductor laver; second-type semiconductor layer, and has a first mesa surface defined by the first-type semiconductor layer, and a second mesa surface defined by the second-type semiconductor layer, The first insulating dielectric layer covers the first and second mesa surfaces and has a first mesa covering portion that covers the first mesa surface, and two bridging arms projecting from the first mesa covering portion. The two bridging arms are located on two opposite sides of the semiconductor structure and connect with the supporting substrate so that the micro-LED is supported by the supporting substrate. The two bridging arms have a thickness which is less than a thickness of the first mesa covering portion on the first mesa surface.

Abstract: A voltage regulating module includes a fine regulating charge pump and a voltage-multiplying charge pump. The first output voltage of the fine regulating charge pump is V1=m*V0, a second output voltage of the voltage-multiplying charge pump is V2=n*V0, and a total output voltage of the voltage regulating module V=V1+V2. V0 is an input voltage, a value of m ranges from 0 to 1, and n is an integer greater than or equal to 1.

Abstract: A micro light emitting diode includes a semiconductor unit having a first surface and a second surface, and including a first type semiconductor layer, an active layer, and a second type semiconductor layer. The first surface has a roughened portion that is located within a projection of the active layer. The projection of the roughened portion has a projected area not greater than that of the active layer. A micro light emitting device and a display are also disclosed.

Abstract: Disclosed are embodiments that communicate label information for documents between two enterprise computer systems. The two computer systems operate asynchronous from each other, and have limited available resources for use in buffering information passing between them. To that end, traditional API architectures that utilize method calls and return parameters do not operate well in this environment, as a first computer systems resources can become exhausted if a second computer system is able to generate data faster than the first computer system can consume it. The problem is exacerbated if an error is experienced when processing the consumed data, especially if there are no resources available to store the data until the error can be cleared. To solve this problem, the disclosed embodiments provide an ability for a consumer to request that data previously delivered to it be delivered again by the producer, in some embodiments, after a specified time delay.