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.

Abstract: The invention discloses an energy storage transient power coordinated control method for restraining subsequent commutation failures, which includes: detecting DC current, AC bus voltage and arc quenching angle on the inverter side; Controlling the energy storage power station to enter the transient control mode when the DC current is greater than the first current threshold or the AC bus voltage is less than the voltage threshold or the arc quenching angle is less than the first arc quenching angle threshold. By detecting the DC current and arc quenching angle on the inverter side, the active power output time instruction and reactive power output time instruction are determined respectively. The active power output amplitude instruction is determined by detecting the AC bus voltage, and the reactive power output amplitude instruction is determined by using the constraint of the total energy storage capacity.

Abstract: A high-speed stereo 3D multimodal imaging system including a beam splitter, a pair of mirrors, a tight focus lens, a microscope stage, an imaging lens, a large area array detector, and a true 3D imaging module is provided. The beam splitter is configured to generate near-infrared ultrafast pulsed laser sub-beams with different angles. The mirrors respectively reflect the beams. The tight focus lens tightly focuses the beams onto a 3D micro-nanoscale sample, which can be carried and three-dimensionally displaced by the microscope stage. The imaging lens collects signals generated due to scattering of the tightly focused beams that are irradiated onto the sample so as to obtain two 2D images. The large area array detector simultaneously detects the two 2D images so that the true 3D imaging module can perform a true 3D imaging according to the detected 2D images. A high-speed stereo 3D multimodal imaging method is also provided.

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: The disclosure discloses a superconducting magnet system and a quench protection circuit thereof. The quench protection circuit includes: a superconducting unit, a first diode integrated element, a second diode integrated element, a third diode integrated element, a low-temperature superconducting switch, a thermal shield and a vacuum vessel. The superconducting unit is composed of M superconducting coils connected in series. The low-temperature superconducting switch is connected to the first superconducting coil and the M-th superconducting coil. The first diode integrated element is connected in parallel with the low-temperature superconducting switch; the thermal shield and the second diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subsets in the superconducting unit.

Abstract: Disclosed by the disclosure is a convolutional neural network on-chip learning system based on non-volatile memory, comprising: an input module, a convolutional neural network module, an output module and a weight update module. The on-chip learning of the convolutional neural network module implements the synaptic function by using the characteristic of the memristor, and the convolutional kernel value or synaptic weight value is stored in a memristor unit; the input module converts the input signal into the voltage signal; the convolutional neural network module converts the input voltage signal layer-by-layer, and transmits the result to the output module to obtain the output of the network; and the weight update module adjusts the conductance value of the memristor in the convolutional neural network module according to the result of the output module to update the network convolutional kernel value or synaptic weight value.

Abstract: The present invention provides composites with controllable superhydrophilic and superhydrophobic performances, a 3D printing method and 3D printed parts. The composites with controllable superhydrophilic and superhydrophobic interface performances comprise hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers. The present invention can print the parts with a continuous wettability change from superhydrophilic to superhydrophobic performances by regulating the mass percentage of the hydrophobic powder, the hydrophilic powder and the jointing phase powder. Furthermore, the present invention can prepare the models with various shapes according to different application scenes, and regulate the interface wettability performances of the models.

Abstract: The present disclosure discloses a sludge composite conditioner based on iron-containing sludge pyrolysis residue as well as a preparation method and use thereof. The sludge composite conditioner comprises iron-containing sludge pyrolysis residue and an oxidant used in combination with the iron-containing sludge pyrolysis residue, in which the iron-containing sludge pyrolysis residue is pyrolysis residue obtained by dewatering iron-containing sludge to obtain an iron-containing sludge cake and then pyrolyzing the iron-containing sludge cake, the iron-containing sludge being obtained from an advanced oxidation technology involving an iron-containing reagent.

Abstract: The present invention provides composites with controllable superhydrophilic and superhydrophobic performances, a 3D printing method and 3D printed parts. The composites with controllable superhydrophilic and superhydrophobic interface performances comprise hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers. The present invention can print the parts with a continuous wettability change from superhydrophilic to superhydrophobic performances by regulating the mass percentage of the hydrophobic powder, the hydrophilic powder and the jointing phase powder. Furthermore, the present invention can prepare the models with various shapes according to different application scenes, and regulate the interface wettability performances of the models.

Abstract: The disclosure discloses a quality inspection system for the entire process of inkjet printing manufacturing of display devices, which includes a substrate inspection module, a nozzle inspection module, an ink droplet inspection module, a coating thickness inspection module, and a control module. Through the design and matching of these modules, it is possible to realize a series of operations such as substrate inspection, nozzle inspection, flying ink droplet inspection, liquid coating inspection, and cured coating inspection. The system also discloses a corresponding quality inspection method for the entire inkjet printing manufacturing process for display devices.

Abstract: An arrayed electrohydrodynamic printhead without the extraction electrodes is provided. A printhead is formed by an ink cartridge, a flow channel plate, a nozzle plate, a control electrode layer. The ink cartridge includes an ink inlet, an ink outlet, an installation hole, a flow channel layer inlet, flow channel layer outlet. The flow channel plate has the functions of guiding the ink to flow into the nozzle plate and increasing the potential difference between the nozzles, and includes a flow channel inlet, a flow channel outlet, a drainage channel, and a microfluidic channel. A body of the nozzle plate includes nozzles and nozzle electrodes. The microfluidic channel forms a voltage division unit between each nozzle, so that the voltage on the triggered nozzle is dispersed in the flow channel without affecting other nozzles, and independent and controllable injection of each nozzle is thereby achieved.

Abstract: A designing method for a fractional order proportional derivative (FOPD)-generalized extended state observer (GESO) controller includes the following steps: S1, selecting an FOPD controller and a GESO to control a motor speed loop, and designing the FOPD controller and the GESO; S2, performing compensation and simplification on a control object of the speed loop by using total disturbance estimated by the GESO to obtain a compensated speed loop control model, the compensated speed loop control model reflecting the characteristics that tracking performance is only related to the FOPD controller, and that anti-interference performance is only related to a bandwidth ?o of the GESO; and S3, respectively solving unknown parameters in the FOPD controller and the GESO. The present method achieves non-overshoot tracking of the speed of a permanent magnet synchronous motor, has excellent anti-interference performance, and resists external load and model changes.

Abstract: Disclosed is a compound expression recognition method with few samples of multi-domain adversarial learning. To extract compound expression features with diversity and complexity with few samples, multiple small sample datasets are fused, and divided into expression sub-domains, and multi-domain adversarial learning is performed to improve the performance of compound expression recognition. Based on the generative adversarial network framework, the face domain and the contour-independent compound expression domain are fused in the generative network to enhance diversity and complexity, and two discriminators are designed to guide the generator. The face discriminator uses the face domain to guide the generator and identify the generator to generate expression-independent face identity attributes, so that the generator has identity diversity.

Abstract: The disclosure discloses a reconfigurable hardware acceleration method and system for Gaussian pyramid construction and belongs to the field of hardware accelerator design. The system provided by the disclosure includes a static random access memory (SRAM) bank, a first in first out (FIFO) group, a switch network, a shift register array, an adder tree module, a demultiplexer, a reconfigurable PE array, and a Gaussian difference module. In the disclosure, according to the requirements of different scenarios and different tasks for the system, reconfigurable PE array resources can be configured to realize convolution calculations of different scales. The disclosure includes methods of fast and slow dual clock domain design, dynamic edge padding design, and input image partial sum reusing design.

Abstract: A reduced instruction set processor based on a memristor is provided. The memristor is a non-volatile device using a resistor to store “0” and “1” logic while implementing “implication logic” through applying a pair of voltages VCOND/VSET. Various data operations, logic operations, and arithmetic operations may be implemented based on the implication logic. The memristor is a computation and memory fusion device having great potential. A computer processor based on the memristor also becomes the research direction of the next-generation computer processor. The computer processor based on a memristor is designed according to the memory and computation fusion characteristic of the memristor. The processor is different from a traditional computer that must use a special memory and a calculator, and fuses computation and memory. Compared with a traditional computer, the speed, parallelism degree, and power consumption of the computer processor based on the memristor are greatly 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 invention provides a preparation method of a bipolar gating memristor and a bipolar gating memristor. The preparation method includes: preparing a lower electrode; depositing a resistive material layer on the lower electrode; and depositing an upper electrode on the resistive material layer by using a magnetron sputtering manner to deposit the upper electrode, controlling upper electrode metal particles to have suitable kinetic energy by controlling sputtering power, controlling a vacuum degree of a region where the upper electrode and the resistive material layer are located, such that a redox reaction occurs spontaneously between the upper electrode and the resistive material layer during the deposition of the upper electrode to form a built-in bipolar gating layer; and continuously depositing the upper electrode on the built-in bipolar gating layer.