Abstract: A chip for visible-light communication (VLC), a preparation method, and an application of the chip includes a substrate, a buffer layer, an intrinsic GaN layer, a first GaN layer, an i-InxGa1-xN functional layer, a second GaN layer, an i-InyGa1-yN functional layer, a third GaN layer, and a top electrode that are stacked sequentially, where 0?x<1 and 0?y?1. Sidewalls of the i-InxGa1-xN functional layer, the second GaN layer, the i-InyGa1-yN functional layer, and the third GaN layer are each provided with a SiO2 isolation layer. A bottom electrode is arranged in an upper portion or on a surface of the first GaN layer, and the SiO2 isolation layer on the sidewall of the i-InxGa1-xN functional layer is located between the bottom electrode and the i-InxGa1-xN functional layer. Based on the structural design and growth process for the chip for VLC, dual-band detection by a high-bandwidth chip can be implemented.

Abstract: Discloses are a method for preparing fluff pulp from bamboos, and the fluff pulp prepared thereby. The method comprises the following steps: treating the bamboos with high-concentration alkali at a relatively mild temperature, after a certain period of treatment, replacing a treatment liquid for separating hemicellulose with a weak black liquor; Kraft cooking the treated bamboos to obtain unbleached bamboo pulp, removing rejects in the unbleached bamboo pulp by using a slotted screen; then removing miscellaneous cells by using a microporous sieve; carrying out two stages of oxygen delignification on the screened pulp; carrying out ECF bleaching treatment of a D0EpD1P process; and finally obtaining the bamboo fluff pulp which has high whiteness, low DCM extract content, low ash content and long fiber length, contains 4.2-4.6 million fibers per gram, and has relatively high bulkiness.

Abstract: An electrocardiograph (ECG) signal enhancement method based on a novel generative adversarial network (GAN) effectively enhances a capability of a generator model for understanding and expressing input data by using a multi-branch structure of bi-directional long short-term memory (BiLSTM) neural networks with different quantities of hidden neurons, and stitching outputs of last time steps of forward propagation of the different BiLSTM networks. A new ECG signal enhancement module EEA-Net is proposed, which uses an adaptive convolutional layer to dynamically adjust a size of a convolution kernel, making the model more flexible in processing input sequences of different lengths. In addition, the model uses an adaptive average pooling layer to perform weighted average pooling on the input data to better capture important information of the input data.

Abstract: An electric boiler device based on utilization of residual energy of an elevator includes a heat storage module, an electric heating module and a control module. A heat storage water tank of the heat storage module is replenished with water from a tap water pipe network, and a preheating unit of the heat storage module converts the residual energy of the elevator into heat energy of the heat storage water tank by using an energy consumption resistor. The control module replenishes a heating water tank with water by delivering preheated water to the electric heating module according to a water level of the heating water tank, and controls a heating unit of the electric heat module to heat the heating water tank according to a user-set temperature, and heated hot water is provided through a user water supply pipe network.

Abstract: Aspects concerning a robot system is provided comprising a ground vehicle, an aerial vehicle capable of flight, and a tether connecting the aerial vehicle to the ground vehicle, wherein the tether comprises on or more Bowden cables, each having an inner cable connected at one end to a respective motor of one or more motors of the ground vehicle and at another end to a component of the aerial vehicle, wherein the ground vehicle comprises a motor controller configured to control movement of the component of the aerial vehicle by controlling the one or more motors.

Abstract: A friction energy dissipation column for bi-directional deformation cooperative and multi-stage working, includes two cantilever part I-shaped steel columns, a middle part I-shaped steel column, wherein the middle part I-shaped steel column is located between the two cantilever part I-shaped steel columns, and the middle part I-shaped steel column is detachably connected to the two cantilever part I-shaped steel columns via a pin shaft connector and a friction energy dissipation assembly. An upper end and a lower end web of the friction energy dissipation column are connected to the frame beam via a connecting plate, and the flanges on both sides are provided with haunched supports.

Abstract: A preparation method for a metal-doped gallium oxide transparent conductive thin film for ultraviolet waveband includes: growing a contact layer thin film (2) on a substrate (1) first, and annealing the grown contact layer thin film (2) in a nitrogen-oxygen atmosphere at 400° C. to 600° C. through a rapid thermal annealing furnace; growing a first Ga2O3 thin film (31) by sputtering through magnetron sputtering under argon conditions; growing a doped thin film (4) by sputtering through magnetron sputtering under argon conditions; growing a second Ga2O3 thin film (32) by sputtering through magnetron sputtering under argon conditions; and annealing the grown thin films in a nitrogen-oxygen atmosphere at 500° C. to 600° C. through a rapid thermal annealing furnace, so that permeation, diffusion and fusion occur between thin film materials to form a metal-doped Ga2O3 thin film (5). A metal-doped gallium oxide transparent conductive thin film for ultraviolet waveband is provided.

Abstract: A total nitrogen intelligent detection system based on multi-objective optimized fuzzy neural network belongs to both the field of environment engineer and control engineer. The total nitrogen in wastewater treatment process is an important index to measure the quality of effluent. However, it is extremely difficult to detect the total nitrogen concentration due to the long detection time and the low prediction accuracy in the wastewater treatment process. To solve the problem, multi-objective optimized fuzzy neural network with global optimization capability may be established to optimize the structure and parameters to solve the problem of the poor generalization ability of fuzzy neural network. The experimental results show that total nitrogen intelligent detection system can automatically collect the variables information of wastewater treatment process and predict total nitrogen concentration.

Abstract: A cofactor self-sufficient Escherichia coli and its construction method and application in the synthesis of L-glufosinate are provided. The present invention expresses a NADH kinase and key enzymes of the cofactor synthesis pathway in E. coli, and knocks out the genes of enzymes that catabolizes cofactor, and with the addition of co-metabolic intermediates during cell incubation, the intracellular NADP(H) concentration is increased by at least 50% and the catalytic activity of glufosinate dehydrogenase by 2-fold, resulting in a significant increase in the spatiotemporal yield of the glufosinate synthesis reaction.

Abstract: A permanent magnet motor with a high-efficiency air-water mixed cooling system is provided. An inner circumference of a stator core of the permanent magnet motor is provided with multiple stator slots along a circumferential direction, armature windings are arranged in the stator slots, an outer circumference of the stator core is provided with multiple axial ventilation channels along an axial direction and a radial ventilation channel along a radial direction. The radial ventilation channel is communicated with the axial ventilation channels and contacts with a rotor core. Stator water-cooling discs are arranged at both ends of the stator core. A casing is provided with an air inlet communicated with the radial ventilation channel, multiple air outlets communicated with the axial ventilation channels, casing water-cooled water inlets and casing water-cooled water outlets. The casing water-cooled water inlets and the casing water-cooled water outlets are both communicated with the stator water-cooling discs.

Abstract: A turnout apparatus for an overhead monorail includes a frame, an input fixed rail docking an input rail, output fixed rails each docking an output rail, and movable rails disposed between the input fixed rail and the output fixed rails. The input fixed rail is disposed at one end of the frame. The output fixed rails include a first output fixed rail and a second output fixed rail disposed at the other end of the frame. The movable rails include a first movable rail docking the input fixed rail and the first output fixed rail, and a second movable rail docking the input fixed rail and the second output fixed rail. The first and second movable rails are fixed and rotatable about a horizontal line as an axis. Directions toward which upper rail surfaces of the first movable rail and the second movable rail face differ by 180 degrees.

Abstract: A multi-station self-positioning floating clamping and workpiece automatic flip intelligent fixture system includes a linear motion device, a workpiece automatic flip device and a self-positioning floating clamping device.

Abstract: The present disclosure refers to a method and a system of sudden water pollutant source detection by forward-inverse coupling, including: building an one-dimensional forward water quality simulation model of a river way according to acquired mechanical parameters and water quality parameters; according to the one-dimensional forward water quality simulation model of the river way, measuring and calculating each monitoring index by using an inverse optimization source-detection model; by constructing the one-dimensional forward water quality simulation model of the river way, using the inverse optimization source-detection model for measurement and calculation; and performing the Bayesian updating, in order to realize multi-information fusion.

Abstract: The present invention discloses a method for infrared small target detection based on a depth map in a complex scene, and belongs to the field of target detection. An infrared image is collected, the image is binarized by using priori knowledge of a to-be-detected target and adopting a pixel value method, the binary image is further limited based on deep priori knowledge, then static and dynamic scoring strategies are formulated to score a candidate connected component in the morphologically processed image, and an infrared small target in a complex scene is detected finally. The method can screen out targets within a specific range, has high reliability; has strong robustness; is simple in program and easy to implement, can be used in sea, land, and air, and has a significant advantage under a complex jungle background.

Abstract: Provided an automatic feeding device for automotive wheel hub, comprising a separable material rack having material rack units capable of being stacked in turn, a first roller table for conveying the separable material rack containing the wheel hub to a second roller table, and a material rack separating device having a support frame and material rack inserting and taking devices; the second roller table, under which a lifting platform is mounted, is located at a first end of lower part of the material rack inserting and taking device; the material rack inserting and taking device splitting the separable material rack into units, and placing to a third roller table being arranged at a second end of the lower part thereof; a manipulator, for grasping and placing the wheel hub from the material rack unit to a fourth roller table being on a second side thereof.

Abstract: A dual-pulse MIG welding power source based on SiC power devices may include a main circuit and a digital control circuit. The main circuit may include a power frequency rectifier filter module, a first SiC high frequency inverter module, a first high frequency transformer, and a first SiC fast full-wave rectifier filter module connected sequentially. The power frequency rectifier filter module may be connected to a three-phase AC power supply, and the first SiC fast full-wave rectifier filter module may be connected to a load. The digital control circuit may include a digital human-machine interaction module, a core control module, a SiC high-frequency drive module, a load voltage and current detection feedback module, and a wire feeding control module. The digital human-machine interaction module may be connected to the core control module.

Abstract: A flexible layer support structure and a retractable device is disclosed. The flexible layer support structure includes a first thin sheet and a second thin sheet arranged in parallel with each other, as well as and a folding spring group sandwiched between the first thin sheet and the second thin sheet and arranged in parallel. The curved elastic pieces in the folding spring group are smoothly overlapped and connected with the thin sheets, so as to enclose a hollow thin-walled elastic structure that can be overlapped and rolled up, can be automatically straightened and has a flat surface. The retractable device includes a winding shaft, a pressure roller, and a flexible layer support structure installed on the winding shaft. The flexible layer support structure of the present disclosure has the advantages in lightweight, high storage ratio, large unfolded area, simple winding, large load bearing capacity, and less damage.

Abstract: A decoupled XY parallel micro-positioning stage, including a central moving platform, fixed mechanisms, bridge-type micro-displacement amplification mechanisms, a four-bar symmetrical flexible guide mechanism and a piezoelectric ceramic. Each fixed mechanism is arranged between adjacent amplification mechanisms and is symmetrical about X and Y axes centered on the moving platform. The amplification mechanism is symmetrically arranged with respect to the X and Y axes, and includes two first and second longitudinal beams and multiple crossbeams. The two first longitudinal beams are provided in parallel and spaced apart. The two second longitudinal beams are arranged spaced apart between the two first longitudinal beams, and are connected to the two first longitudinal beams via the crossbeams. The crossbeams are connected to the longitudinal beams via a flexible hinge. The piezoelectric ceramic is arranged between the two first longitudinal beams.

Abstract: A SpyCatcher peptide-modified carrier, a protein immobilizing carrier, and a protein immobilizing method. The method comprises: linking a SpyCatcher peptide to a carrier so as to obtain a SpyCatcher peptide-modified carrier; and then based on a SpyCatcher-SpyTag reaction, immobilizing a target protein containing SpyTag to the SpyCatcher-modified carrier. A protein immobilization process in which the method is used is fast, a condition is mild, no extra chemical reagent is needed, the immobilization efficiency and an activity recovery rate are high, and the homogeneity is good.

Abstract: The present invention discloses a preparation method of highly alkali-stable cationic polymers, including the following steps: placing a polymerization mixture comprising 1-R1-3-piperidinone or its salts or hydrate thereof and arene monomers in a first organic solvent, performing catalytic polycondensation by adding organic strong acids, and obtaining a polymer dispersion with piperidine moieties; slowly dropping the dispersion of the polymer with piperidine moieties into a first precipitant, and obtaining a polymer powder with piperidine moieties after drying; dissolving the polymer powder with piperidine moieties of in a second organic solvent, after adding the quaternization reagent, obtaining a cationic polymer solution.