Abstract: A multi-source solid waste recycling method based on composition design for calcium-silicon-aluminum-magnesium oxide includes collecting multi-source solid waste composition data; calculating and designing compositions of calcium oxide, silicon oxide, aluminum oxide and magnesium oxide units to obtain an inorganic non-metallic raw material with a target composition; and melts the raw material into slag, and uses carbon, metallic aluminum, aluminum nitride, aluminum carbide, silicon nitride and silicon carbide in the multi-source solid waste as reducing agents. The slag provides a high-temperature homogeneous reaction environment and serves as a “solvent” for reactants, the reducing agents reduce valuable metals in the slag to obtain an alloy, thereby achieving recovery of the valuable metals, and the slag is used for the inorganic non-metallic material in a high-value mode.

Abstract: A composition of an indium oxide catalyst including an alkali dopant and a method for producing an indium oxide catalyst including an alkali dopant. The alkali dopant may include a cation of Li+, Na+, K+, Rb+, Cs+, and Fr+. The method for producing the indium oxide catalyst including an alkali dopant includes mixing a solution of an indium salt with a base to form precipitated indium hydroxide, contacting the precipitated indium hydroxide with a solution including an alkali metal salt to produce an indium hydroxide solution, and calcinating the indium hydroxide solution to form indium oxide; thereby forming the indium oxide catalyst including an alkali dopant.

Abstract: A method is to estimate the state of batteries by using a multi-level neural network formed with at least three neural networks. The method comprises steps of: extracting features from the charging and discharging data of a battery through a first-level neural network to form a first-stage output data, and inputting the first-stage output data into a second-level neural network; enhancing local features in the first-stage output data through the second-level neural network to form a second-stage output data; combining the first-stage output data with the second-stage output data to form a combination result to be input into a third-level neural network for data modeling, to generate a state estimation result of the battery. The present invention improves the accuracy of estimation for a flat zone in the charge/discharge curve of the battery, and quickly adjusts the multi-level neural network to achieve accurate estimation of different types of batteries.

Abstract: Wave-absorbing materials in the form of a nickel-carbon composite that includes a plurality of modified carbon particles, where each of the modified carbon particles includes a nickel nanoparticle core and a carbon layer wrapped on a surface of the nickel nanoparticle core; and a plurality of the modified carbon particles form an octahedral structure. When a high-frequency microwave interacts with the nickel-carbon composite, the composite has a stronger magnetic loss performance due to various magnetic loss characteristics such as natural resonance and eddy current loss of the magnetic nickel nanoparticles. In addition, the carbon layer, as a shell layer, can provide a directional electron migration path in a special octahedral space structure to construct a conductive network.

Abstract: A water-retaining material, including: a polymer chain segment provided by a hydrophilic polymer; and a proton carrier group grafted to the polymer chain segment. The polymer chain segment contains a hydrophilic group. A method for preparing a water-retaining material, includes: performing, in a reaction system including an activator and a catalyst, a grafting reaction between a hydrophilic polymer and a proton carrier compound to yield the water-retaining material. The water-retaining material contains a polymer chain segment containing a hydrophilic group. A water-retaining proton exchange membrane, includes a matrix. The matrix is doped with a water-retaining material; and the water-retaining material including the above water-retaining material.

Abstract: A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.

Abstract: There is provided a system and method of selectively monitoring ions in a fluid medium using a graphene sensor, the method comprising the step of adjusting an operating frequency of the graphene sensor to a particular resonant frequency for targeting resonance of specific ions in the fluid medium. In the proposed method, dispersive effect of the fluid medium is used to tune the graphene sensor to a desired frequency, thereby obtaining resonance response for specific ions in the fluid medium. Also, the monitoring of a specific ion in the fluid medium is unaffected by presence of a plurality of other ions in the said fluid medium.

Abstract: A device can be used to implement a neural network in hardware. The device can include a processor, a memory, and a neural network accelerator. The neural network accelerator can be configured to implement, in hardware, a neural network by using a residue number system (RNS). At least one function of the neural network can have a corresponding approximation in the RNS system, and the at least one function can be provided by implementing the corresponding approximation in hardware.

Abstract: Provided is a three-phase system V2O3/VN/Mo2C nanoelectrode material, and a preparation method and application thereof. The nanoelectrode material comprises V2O3 particles, VN particles, and Mo2C particles. The V2O3 particles, VN particles, and Mo2C particles are interlaced in lattice stripes and are uniformly distributed. The mass ratio of the V2O3, VN and Mo2C is (1 to 4):(10 to 40):(4 to 16). The above-mentioned three kinds of nanoparticles are intertwined to form more incoherent interface area. The increase in the area of the incoherent interface area will cause more defects, so that more active sites are provided, and the hydrogen production performance is improved.

Abstract: A magnetic-field-adjustable micromagnetic orthodontic accelerator includes a cheek side plate, a tongue side plate and a supporting plate to form a structure of teeth sleeves, cheek side magnets and tongue side magnets are arranged on the cheek side plate and the tongue side plate respectively, the cheek side magnets and the tongue side magnets form a micro magnetic field environment around roots of to-be-moved teeth receiving orthodontic treatment, physiological magnetic field loss caused by traction of the orthodontic accessory is effectively compensated, metabolism and reconstruction of periodontal tissue of the to-be-moved teeth are promoted, and the orthodontic teeth moving process is accelerated.

Abstract: A robotic device is described. The robotic device includes segments and arms connected to a platform. A machining or another processing tool can be coupled to the platform. The segments can have one end attached to the platform and the other end attached to an attachment device. The attachment device can include an attachment surface/mechanism that can attach to a workpiece.

Abstract: An efficient transplanting device with an automatic seedling pick-up and supplementation function includes a seedling pick-up device, a seedling discharging device, and a seedling supplementation device. The seedling discharging device is used to discharge plug seedlings for transplantation; the seedling pick-up device is used to transfer the plug seedlings and the seedling supplementation device is used to supplement the plug seeding. A seedling pick-up photoelectric sensor, a detection camera, and a controller are provided for the operations of plug seedling pick-up, supplementation and discharge of the plug seedlings.

Abstract: An ultrahigh-temperature wind tunnel erosion testing system is provided, including a fuel system (1), an erosion system (2), an erosion spray gun (3), a test piece fixture (5) and a testing device; the erosion spray gun (3) is connected with the fuel system (1) and the erosion system (2) respectively; the erosion spray gun (3) is arranged on a lifting and rotating mechanism (4); the test piece fixture (5) is arranged on one side of the lifting and rotating mechanism (4) and is opposite to a nozzle of the erosion spray gun (3); and the testing device is connected with the test piece fixture (5). The plurality of groups of test pieces are circlewise arranged around the lifting and rotating mechanism (4).

Abstract: A device and a method of flattening recycled carbon fiber material are provided. A main body is provided with two flat plates at an upper and a lower positions corresponding to each other and an ultrasonic unit is disposed on each of the flat plates. While in use, recycled carbon fiber material is placed at the lower flat plate and then at least one ultrasonic probe of the ultrasonic unit is driven to work and vibrate the recycled carbon fiber material into a flat and thin state. After the flattened recycled carbon fiber material being pressurized to form products required, the product has flat and smooth surfaces with special textures. A thickness of the product can be controlled and the product can be thinned according to users' needs, without surface treatment such as grinding, polishing, etc. Thereby production cost is reduced and yield rate of the products is improved.

Abstract: A machine learning-based method for designing a high-strength high-toughness steel, including: (S1) obtaining data and filling in missing parts to form a data set; (S2) selecting feature data in the data set to form a standard data set; (S3) constructing two machine learning models of the high-strength high-toughness steel; (S4) completing training after the two models are evaluated to be qualified; (S5) finding frontier points, drawing a Pareto front, and distinguishing a known region and a feature space; (S6) in the feature space, setting a step for the feature data, drawing a grid space, and performing multiple training predictions on each grid point by using the models, to obtain predicted Gaussian distributions of two objectives; and (S7) searching for an expected improvement point through an efficient global optimization algorithm, and obtaining design parameter values of corresponding features.

Abstract: The present disclosure provides a preparation method of a yak hide-derived oligopeptide ferrous chelate with a high antioxidant activity. The preparation method includes preparing a yak hide-derived oligomeric collagen peptide and subjecting the yak hide-derived oligomeric collagen peptide as a protein source to chelation with an iron source in water. A pretreated yak hide is subjected to enzymatic hydrolysis under a pH value of 7 at 50° C. for 4 h with an amount of an enzyme added at 2% to obtain a yak skin-derived collagen with a molecular weight of less than 2 kDa; the chelation is conducted in a peptide-to-iron mass ratio of 1:1 to 5:1 with a peptide concentration of 1% to 5% at 30° C. to 70° C. for 20 min to 60 min under a pH value of 3 to 8; and an iron chelating capacity is 42.72 mg/g under optimal preparation conditions.

Abstract: A flexible electromyographic electrode array and a preparation method therefor, and an electromyographic signal collection apparatus and an electrophysiological signal collection method. The flexible electromyographic electrode array includes: a flexible substrate (100); several liquid metal electrodes, wherein the liquid metal electrodes are arranged on the flexible substrate (100), and the liquid metal electrodes each include a wire and a circuit board connection pattern (110) which is located at one end of a wire (120); and several electrode contacts (130), wherein each of the electrode contacts (130) is connected to the other end of the wire (120), and the electrode contacts (130) are made of a contact solution which contains a hydrophilic polymer and a poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate.

Abstract: Disclosed are a strain of Lactobacillus helveticus capable of removing multiple heavy metals and an application thereof in milk powder, where the strain is Lactobacillus helveticus KD-3, which is deposited in the China Center for Type Culture Collection on Apr. 6, 2023, with a deposit number of CCTCC NO: M2023479. The Lactobacillus helveticus KD-3 has a cadmium resistant gene czcD, a chromium resistant gene chrA and a lead resistant gene pbrT, and is capable of tolerating single and compound heavy metals (cadmium, chromium and lead). The Lactobacillus helveticus KD-3 of the present disclosure is used to prepare lyophilized bacterial powder.

Abstract: A luminescent probe and its preparation method and application are provided. The luminescent probe has a steric hindrance group R1 of aliphatic hydrocarbon structure such as adamantane or norborneol, a detection group R2 of nitrobenzyl and its derivative structure, an electron-withdrawing group R3 containing cyano group and an electron-donating group methoxy group. In the presence of HSA or BSA, the detection group is cut off to form a parent structure that exposes atomic oxygen anions and is activated under external light irradiation, the luminescent probe can be used in solution or cells, when detecting HSA or BSA, the luminescent probe has obvious chemiluminescence characteristics, which can sensitively distinguish HSA and BSA, quantitatively analyze HSA and BSA, and determine the mixing ratio of HSA and BSA at the same time, and the luminescent probe has been successfully used for cell fluorescence imaging.

Abstract: A night hyper-spectral remote sensing imaging system for multi-component atmospheric trace constituents includes a light source unit, a detection light path unit, an unmanned aerial vehicle tracking light path unit, and a control and processing unit, where the light source unit couples and outputs first light source light with different wavelength ranges capable of imaging at night; the detection light path unit collimates and outputs the first light source light, and receive remote sensing light fed back based on the first light source light; the unmanned aerial vehicle tracking light path unit tracks and positions an unmanned aerial vehicle based on an unmanned aerial vehicle tracking light path; and the control and processing unit collects an original spectrum of the first light source light and a remote sensing spectrum and perform imaging analysis and process on the multi-component atmospheric trace constituents, and adjust and control the tracking light path.