Abstract: Disclosed are free-form curved surface slicing method and device based on implicit model, includes following: (1) Using mesh model of layered curved surface to intersect with implicit model of a part to be manufactured to obtain contour lines; (2) Comparing rules for intersecting contour lines and meshes within mesh, mesh coordinates are substituted into implicit model, obtaining a position of an intersection point of contour lines in corresponding mesh; (3) Using interpolation method to calculate intersection coordinates of contour lines and mesh boundary, specifying storing sequence of interpolation points, storing intersection points of discrete line segments in mesh; (4) Merging unordered point sets obtained to establish topological relationship between point sets and discrete line segments, each line segment corresponds to two endpoints, each endpoint corresponds to two line segments, based on above, all points traversed will be connected into complete and ordered profile, that is sliced profile.

Abstract: The present invention relates to a dynamic memory management apparatus and method for HLS, the apparatus has several searching and caching modules and several modifying and writing-back modules, the searching and caching modules are in connection with a DRAM storing module and a BRAM buffer, respectively, and the modifying and writing-back modules are in connection with the DRAM storing module and the BRAM buffer, respectively, the BRAM buffer is for caching information about nodes on a search path and registering information about modification made to the nodes. To remedy the defect that the traditional operating system is directly transplanted to the FPGA and has low execution efficiency, the present invention utilizes the advantage of the large capacity of the DRAM on the FPGA to realize efficient dynamic memory allocation and deallocation, and improve the usability and code reusability of HLS.

Abstract: A Y-branch type phase-change all-optical Boolean logic device comprises a waveguide of a Y-branch structure and phase change function units covered over the waveguide. In the logic implementation method, a light pulse having a large power is employed to perform a write operation on the phase change function unit, so that the phase change function unit is heated to generate a crystallization or amorphization phase change, thereby causing a difference in optical properties under two states; the state of the phase change function unit is read by employing a light pulse having a small power, and the state of its phase change material is not changed. By defining input logic signals respectively and defining three operation steps, an operation mode reconfigurable logic can be implemented, and all 16 binary Boolean logic calculations are implemented in a simple structure by means of step-by-step operation.

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: Disclosed is a method for measuring optical properties and geometric properties of a thin film material, which belongs to the field of ellipsometry. The method realizes the automation of the ellipsometry data analysis with accurate results and includes using a spline model and a forward optical property model to generate a training set; training a neural network model; sequentially inputting preliminary results of geometric parameters and spline parameters of a material obtained by inputting the measured optical characterization quantity into the neural network into the spline model and the forward optical property model to obtain a theoretical optical characterization quantity. After optimizing the neural network model by using the deviation between the theory and the measured optical characterization quantity, the predicted value of the output is the final geometric and optical property parameters of the material.

Abstract: The present invention discloses a provenance graph-oriented host intrusion detection method and system, and a storage medium, which relates to the field of cyber security.

Abstract: A method and a system for building a short-wave, medium-wave and long-wave infrared spectrum dictionary are provided.

Abstract: Disclosed are a method for processing and recycling an ultrathin lithium foil and a product, which belongs to the field of lithium-ion batteries. According to the disclosure, a liquid-phase thinning agent is adopted to perform a contact reaction with a lithium metal, the fabricated ultrathin lithium foil has a thickness of 20 ?m or less, the surface is flat, the thickness can be randomly regulated, and the uniformity is good. The method of the disclosure can also recycle a lithium-containing byproduct generated in the preparation process. When the ultrathin metal lithium foil prepared by the disclosure is used as a metal lithium negative electrode of a lithium battery, the energy density of the battery can be improved, and the battery manufacturing cost is reduced. The ultrathin metal lithium foil can also be used to supplement lithium for other types of electrode materials, thereby a broad application prospect is achieved.

Abstract: A hardware acceleration method and system based on a scale-invariant feature transform algorithm in the field of hardware acceleration design of algorithms is disclosed. The architecture mainly includes two parts: keypoint detection and descriptor generation. Four buffers between these two parts are ping-ponged to increase the system processing speed. In the keypoint detection part, firstly, multi-layer Gaussian pyramid and Gaussian difference pyramid are calculated in parallel; through parallel calculation, the keypoints and gradient magnitudes and orientations are obtained. In the descriptor generation part, a keypoint region division strategy based on the circular keypoint region is provided, and the parallel calculation of a main orientation calculation module and a descriptor generation module are implemented. Finally, the output is obtained through descriptor rearrangement and dimensionality reduction module.

Abstract: The present disclosure relates to the technical field of heat dissipation for electronic devices, and discloses a manifold microchannel heat sink based on directional optimization of hotspot areas, including a power module, a heat dissipation substrate, a cold source device, and a diverter manifold; the heat dissipation substrate is arranged on the power module, a microchannel is provided on a side of the heat dissipation substrate away from the power module and on a back of a heat generating area of the power module for carrying the power module and dissipating heat from the power module. According to the manifold microchannel heat sink based on the directional optimization of hotspot areas, the local heat dissipation performance of the power module may be preliminarily changed by optimizing the microchannel on the heat dissipation substrate, which avoids poor heat dissipation temperature uniformity in a multi-heat source system.

Abstract: A method for establishing a three-dimensional ultrasound image blind denoising model and a use thereof include: adding a speckle noise to three-dimensional biological structure images of a same size and without speckle noise to obtain a training data set; establishing a three-dimensional denoising network based on an encoding-decoding structure, wherein the encoding structure is used to obtain N feature maps of a three-dimensional input image and perform a downsampling to obtain feature maps of different scales; the decoding structure is used to take a feature map obtained by the encoding structure as an input and reconstruct a three-dimensional image without speckle noise through upsampling; dividing the encoding-decoding structure into a plurality of stages by a downsampling structure and an upsampling structure; training the three-dimensional denoising network using the training data set to obtain a three-dimensional ultrasound image blind denoising model.

Abstract: The disclosure provides a quasi-dynamic in situ ellipsometry method and system for measuring a photoresist exposure process.

Abstract: The present application provides a VR-based standardized training system for multi-person online cooperated first-aid nursing of trauma, which is used for providing medical staff with an efficient and convenient-to-update and maintain standardized training environment for multi-person online cooperated first-aid nursing of trauma by introducing the VR technology, so as to significantly improve the training effect of the first aid of trauma of the medical staff.

Abstract: The present invention relates to the technical field of lithium metal batteries, and relates to a lithium metal battery electrolyte containing an aromatic compound as a diluent. The electrolyte contains a lithium salt, a solvent for dissolving the lithium salt, and a diluent; the diluent is an aromatic compound, and the diluent is used for inhibiting lithium dendrites generated due to uneven deposition of a lithium metal anode in the lithium metal battery during a cycle process, and is used for inhibiting the lithium metal anode in the lithium metal battery from reacting with the electrolyte.

Abstract: A control method, a control device and a wind farm system for a wind turbine frequency support are provided. The control method includes the following: calculating a comprehensive inertia power value by using a wind farm frequency modulation capability level coefficient when a frequency accident occurs in the wind farm; obtaining a real-time rotational speed of each wind turbine to calculate a state factor that changes in real time, where each wind turbine adjusts a state reference power value of its own by exchanging the state factor with a neighboring wind turbine; and determining instantaneous stator power of each wind turbine by using a MPPT part corresponding to the rotational speed, the comprehensive inertia power value, and the state reference power value, so as to control each wind turbine to perform frequency support until a predetermined frequency support time is reached.

Abstract: A read and write circuit of a three-dimensional phase-change memory including an operation control circuit and a read and write operation circuit connected to each other. The operation control circuit is configured to load a correct operation pulse onto the read and write operation circuit. A read and write unit in the read and write operation circuit is connected to a memory cell and is configured to load the correct operation pulse onto the memory cell corresponding to the three-dimensional phase-change memory and to mirror the correct operation pulse to a mirror current. A bandgap reference source and a hysteresis comparator are connected to a mirror circuit branch. A feedback chopper circuit loop is connected across the memory cell and the mirror circuit branch and is configured to monitor a current flowing through the memory cell in real time.

Abstract: A method for establishing a three-dimensional ultrasound image blind denoising model and a use thereof include: adding a speckle noise to three-dimensional biological structure images of a same size and without speckle noise to obtain a training data set; establishing a three-dimensional denoising network based on an encoding-decoding structure, wherein the encoding structure is used to obtain N feature maps of a three-dimensional input image and perform a downsampling to obtain feature maps of different scales; the decoding structure is used to take a feature map obtained by the encoding structure as an input and reconstruct a three-dimensional image without speckle noise through upsampling; dividing the encoding-decoding structure into a plurality of stages by a downsampling structure and an upsampling structure; training the three-dimensional denoising network using the training data set to obtain a three-dimensional ultrasound image blind denoising model.

Abstract: The disclosure discloses a thermal reawakening operation method and system for enhancing polarization of a hafnium-based ferroelectric film, belonging to the field of micro-nanoelectronic technology, which includes the following. S1. Heating is performed on the hafnium-based ferroelectric thin film. S2. A pulse voltage having multiple cycles is applied to the hafnium-based ferroelectric thin film. S3.The hafnium-based ferroelectric thin film is cooled to an initial temperature. In the disclosure, through the thermal reawakening operation, a certain amount of oxygen vacancies are generated, and the non-polarized phase is transformed into the polarized phase, the polarization value of the hafnium-based ferroelectric film can be significantly improved at a low cost and with a simple operation, thereby the performance of the hafnium-based ferroelectric device is significantly improved.

Abstract: The present invention provides a Ga-based van der Waals room-temperature ferromagnetic crystal material, preparation and use thereof, which belong to the technical field of nano magnetic material preparation. The materials include Fe3-aGabTe2 (a=?0.3 to 0.1, b=0.8 to 1.2) and Fe5-c GeGadTe2 (c=?0.2 to 0.2, d=0.01 to 0.5). The growth method of Fe3-aGabTe2 (a=?0.3 to 0.1, b=0.8 to 1.2) is a self-flux method, using excess Ga and Te as flux to grow crystals. The growth method of Fe5-c GeGadTe2 (c=?0.2 to 0.2, d=0.01 to 0.5) uses iodine as a transport agent to grow crystals. The Ga-based van der Waals room-temperature ferromagnetic crystal Fe3-a GabTe2 (a=?0.3 to 0.1, b=0.8 to 1.2) and Fe5-cGeGadTe2 (c=?0.2 to 0.2, d=0.01 to 0.5) materials have Curie temperature of 330 K to 367 K and 320 K to 345 K, and the saturation magnetic moments are 50 emu/g to 57.2 emu/g and 80 emu/g to 88.5 emu/g, respectively.

Abstract: The disclosure discloses a magnetic levitation planar motor workbench having a double-layer winding of coarse and fine drive, which belongs to the technical field of planar motors, and includes a stator and a mover. The vertically magnetized permanent magnets and the horizontally magnetized permanent magnets in the stator are arranged in a Halbach arrangement; the mover is located on the enhanced side of the air gap magnetic field above the stator. The mover adopts the double-layer winding of unequal heights, and the height of the upper first winding is smaller than the lower second winding. Each layer of winding may generate driving forces in six directions to achieve six-degree-of-freedom driving.