Abstract: Disclosed is a selective field-assisted machining system. The system includes a micron-level high-speed identification module, an in-situ laser assisted module, an ultrasonic vibration module, an energy field loading high-speed control module, and a diamond tool. The micron-level high-speed identification module is used to quickly identify the type of a material substrate of a workpiece to be processed, process the identification information into a corresponding control signal, and send same to the energy field loading high-speed control module to implement selective processing of the workpiece to be processed, i.e. to process brittle particles using in-situ laser assisted machining and to process a soft metal substrate using ultrasonic vibration processing. In the present invention, ultra-precision cutting of brittle particles and a soft metal substrate can be completed at the same time in a single processing process.

Abstract: A non-volatile Boolean logic circuit based on memristors and an operation method, which performs logic operations on the input logic value P and/or the input logic value Q. The logic circuit includes: a controller, a memristor M1, a memristor M2 and a resistor. The controller sets the memristor M2 to a high resistance state before performing the logic operation. When performing the logic operation, a voltage A is applied to the memristor M1, a voltage B is applied to the memristor M2, a voltage C is applied to the resistor. The resistance state of the memristor M2 is the result of the logic operation. When a logic operation is performed on the logic value P and the logic value Q or only on the logic value Q, the controller further sets the memristor M1 to the resistance state corresponding to the logic value Q before performing the logic operation.

Abstract: The present invention relates to the technical field of photoelectric materials, and in particular, to an alcohol dispersion of a conductive polyethylenedioxythiophene, and a method for preparing same and use of same. The present invention comprises a conductive polyethylenedioxythiophene and an alcohol, and the conductive polyethylenedioxythiophene comprises a polyethylenedioxythiophene cation and a fluorinated sulfonic acid ionomer counter anion. The present invention prepares a PEDOT alcohol dispersion by using an alcohol-dispersible highly fluorinated sulfonic acid ionomer as a counter anion to replace PSS, solving the hygroscopicity problem in conventional aqueous dispersions, and solving the problem that a conventional conductive aqueous dispersion of polyethylenedioxythiophene cannot be evenly applied on a hydrophobic surface due to high surface tension.

Abstract: A method for characterizing polarization image information and a method for computing characterization parameters are provided. The method includes: obtaining n polarized subimages of a polarization imaging target, wherein each polarized subimage corresponds to a different polarization angle and n?3; and computing a parameter matrix [ILP (x, y) INLP(x, y) ?(x, y)] of a polarization cosine characterization equation of all pixel points of the polarization imaging target according to all polarized subimages and the polarization cosine characterization equation of the polarization imaging target. The disclosure obtains a maximum polarization intensity image and a minimum polarization intensity image through computing multiple polarization intensity images, which improves the accuracy of polarization imaging, and the degree of accuracy is much higher than macroscopic accuracy.

Abstract: A real-time vector analysis method for detecting an optical signal with a bandwidth greater than 1 THz includes: mapping, by a time-lens focusing system, a spectrum of a signal under test to different temporal location information; obtaining, by fully broadening an ultrashort pulse by a dispersion, a time domain spectrum of the ultrashort pulse to form a chirped swept frequency source; inputting an out of the signal under test after passing through the time-lens and the chirped swept frequency source to a coherent receiver to realize an interference process and a conversion of an optical signal to an electrical signal, and recovering an intensity information and a phase information of frequency domain of the signal under test from the electrical signal by data acquisition and processing; then recovering a full-field information of time domain of the signal under test by a Fourier inverse transform.

Abstract: The disclosure discloses a preparation method and product of carbon fiber reinforced polymer composites with a designable characteristic structure. The method includes: (a) choosing carbon fabrics as raw material, where a predetermined number of the fabrics are selected to deposit the reinforcement phase; (b) coating all carbon fabrics with resin matrix, placing the fabrics layer by layer, where the carbon fabrics with the reinforcement phases are placed in a predetermined layer, meanwhile a micro power supply is placed in a setting layer during the stacking process, then a prefabricated product is obtained; (c) placing the prefabricated product in a vacuum bag then evacuating and sealing, hot pressing the sealed prefabricated product, finally the carbon fiber reinforced polymer composite product in the vacuum bag after hot pressing is successfully manufactured.

Abstract: An action detection method based on a human skeleton feature and a storage medium belong to the field of computer vision, and the method includes: for each person, extracting a series of body keypoints in every frame of the video as the human skeleton feature; calculating a body structure center point and approximating rigid motion area by using the human skeleton feature as a calculated value from the skeleton feature state, and predicting an estimated value in the next frame; performing target matching according to the estimated and calculated value, correlating the human skeleton feature belonging to the same target to obtain a skeleton feature sequence, and then correlating features of each keypoint in the temporal domain to obtain a spatial-temporal domain skeleton feature; inputting the skeleton feature into an action detection model to obtain an action category. In the disclosure, the accuracy of action detection is improved.

Abstract: A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.

Abstract: The present disclosure provides a drop impact prediction method and system for heavy equipment airdrop based on a neural network. The drop impact prediction method includes the following steps: S1: acquiring a plurality of sets of sample data by using a finite element model for drop simulation of heavy equipment airdrop; S2: determining structural parameters of a BP neural network, and pre-processing the structural parameters; S3: constructing a BP neural network model; and S4: predicting a drop impact situation of heavy equipment airdrop in an actual application process by using the trained BP neural network model.

Abstract: A planetary wheel type obstacle crossing robot, including a frame, a front drive set, and a rear drive set, is provided. The front drive set and the rear drive set are respectively connected to a front end and a rear end of the frame. The front drive set includes a dual-drive steering wheel structure, which includes two drive wheels and two first drive devices. The first drive devices respectively output different rotational speeds to the drive wheels, so that the dual-drive steering wheel structure rotates. The rear drive set includes two planetary wheel sets, two second drive devices, and a planetary wheel set suspension structure. Each planetary wheel set is individually driven and includes a front wheel, a rear wheel, and an upper wheel. The wheels of each planetary wheel set cooperate to climb over an obstacle under an action of a driving torque output by the second drive device.

Abstract: The disclosure belongs to the technical field of additive manufacturing, and discloses a flexible piezoelectric sensor based on 4D printing and a preparation method thereof. The sensor includes a magnetic part and a conductive part, wherein: the conductive part includes two substrates disposed opposite to each other and a spiral structure disposed between the two substrates. Both the two substrates and the spiral structure are made of conductive metal materials. The magnetic part has a flexible porous structure and is arranged between the two substrates to generate a magnetic field. When the substrate is subjected to external pressure, the spiral structure and the magnetic part are compressed simultaneously, the magnetic flux passing through the spiral structure changes, and the voltage of the two substrates changes, by measuring the voltage change of the two substrates to reflect the change of external pressure, the pressure measuring process is achieved.

Abstract: A construction method and system for a visible near-infrared spectrum dictionary is provided. The method includes: constructing a four-primary color chromaticity cone by using normalized spectral response curves of four primary colors of a visible light camera as spectral basis functions; performing weighted combination on the spectral basis functions and forming an initial visible near-infrared spectrum dictionary; acquiring points on the four-primary color chromaticity cone on the basis of the initial visible red infrared spectrum dictionary according to different spectral resolutions and performing discretization, and forming words in the initial visible near-infrared spectrum dictionary; clustering chromaticity coordinates corresponding to the words into different groups, performing weighted combination on multi-scale spectral response curves corresponding to different group types, generating phrases or sentences in the dictionary, and generating a final visible near-infrared spectrum dictionary.

Abstract: A method for preparing carbon black from pyrolysis char of waste tires by a molten salt thermal treatment and a product thereof are provided. The method includes heating one or two groups of a metal chloride salt group and a metal sulfate group to obtain a molten salt; adding pyrolysis char of waste tires into the molten salt and subjecting same to a molten salt thermal treatment under a preset reaction atmosphere; after the reaction is complete, separating the reaction product to obtain a secondary molten salt and treated pyrolysis char, washing the treated pyrolysis char with hot water and then drying same so as to obtain carbon black, and at the same time, recycling the secondary molten salt.

Abstract: An intra-frame predictive coding method, medium and system for a 360-degree video belong to video coding field are provided. The method includes: inputting features of a coding unit (CU) block to be partitioned into a neural network when intra-frame block partition (IFBP) is performed on a current CU block (CCUB), skipping a partition mode that the output of the neural network is smaller than threshold, and obtaining a plurality of IFBP schemes; determining a length n of a rough mode decision candidate list according to a CU feature and a texture feature of the sub-CU block when an intra-frame angle mode is decided to decide the intra-frame angle mode and to fill pixels in each IFBP scheme; calculating rate distortion optimization (RDO) loss between each IFBP scheme and the CCUB after pixel filling and performing intra-frame coding predictive coding on the CCUB based on the scheme.

Abstract: The disclosure discloses a skin-attached blood oxygen saturation detection system and a preparation method thereof. The system includes a front-end flexible blood oxygen saturation detection circuit and a back-end signal processing output module connected to each other. The front-end flexible blood oxygen saturation detection circuit uses a flexible packaging material to act as a packaging layer, a surface of the front-end flexible blood oxygen saturation detection circuit has an adhesive functional layer, and is configured to detect blood oxygen saturation of a human tissue through a reflective optical principle. The back-end signal processing output module is configured to transmit a blood oxygen saturation signal to a mobile terminal through a Bluetooth antenna transmission module.

Abstract: The disclosure provides a straight waveguide phase change all-photonic Boolean logic device and a full binary logic implementation method thereof, including a ridge- shape straight waveguide structure, two phase change functional units near the two ends and a Bragg grating between two phase change functional units. The phase change functional units and Bragg grating are situated on the ridge of the waveguide. The write and read optic pulses have different wavelengths. The Bragg grating are designed to reflect the write optical pulse and transmit the read pulse, so that write pulses input from the two ends only act on the phase change functional unit closest to that end, and read pulse can go through the whole device from input end to output end. In terms of the logic implementation method, with three-step write operation, 16 full Boolean logic functions can be implemented in this device.

Abstract: Disclosed in the present invention are a method and system for evaluating a fractal dimension of particle matter in a dispersing system. The method includes: setting that distribution of a particle radius r of particle matter in a dispersing system obeys logarithmic normal distribution lnr˜N(?, ?2) with an expectation ? and a standard deviation ?, and determining the value of the standard deviation ?; and evaluating a fractal dimension Dƒ of the dispersing system on the basis of the standard deviation ?, an evaluation formula being: Dƒ=1/?. The present invention provides the formula for evaluating the fractal dimension of particle distribution in a dispersing system. When the formula is used to calculate a fractal dimension, only particle radius distribution of particle matter needs to be measured, and no geometrical morphology feature parameter of the particle matter needs to be measured. Factors such as particle morphology and the like do not affect the fractal dimension.

Abstract: A gravimeter probe includes a spring structure, a proof mass, movable comb fingers, fixed comb fingers, and an outer frame. A fixed end of the spring structure is arranged on the outer frame and a free end thereof is connected to the proof mass. The movable comb fingers are arranged on upper and lower surfaces of the proof mass, and the fixed comb fingers are correspondingly arranged on the outer frame. Each of the movable comb fingers and the fixed comb fingers has a special-shaped comb finger structure. The special-shaped comb finger structure includes a comb finger bottom portion and a comb finger top portion, and the width of the comb finger bottom portion is smaller than the width of the comb finger top portion.

Abstract: The present invention belongs to the field of energy and environmental protection and particularly relates to an organic solid waste treatment device based on chemical-looping hydrogen production and a method for using the same. The device comprises a pyrolysis reactor and a sleeve-type chemical-looping reactor, the sleeve-type chemical-looping reactor comprises an inner cavity, an outer cavity annularly wrapping the inner cavity, a syngas output device, a hydrogen output device, a pyrolysis gas inlet device, and a water vapor inlet device, and the pyrolysis reactor can generate pyrolysis gas, which then is conveyed to the sleeve-type chemical-looping reactor through the pyrolysis gas inlet device.

Abstract: Additive manufacturing (AM) methods and devices for high-melting-point materials are disclosed. In an embodiment, an additive manufacturing method includes the following steps. (S1) Slicing a three-dimensional computer-aided design model of a workpiece into multiple layers according to shape, thickness, and size accuracy requirements, and obtaining data of the multiple layers. (S2) Planning a forming path according to the data of the multiple layers and generating computer numerical control (CNC) codes for forming the multiple layers. (S3) Obtaining a formed part by preheating a substrate, performing a layer-by-layer spraying deposition by a cold spraying method, and heating a spray area to a temperature until the spraying deposition of all sliced layers is completed. (S4) Subjecting the formed part to a surface modification treatment by a laser shock peening method.