Abstract: The present application discloses a verification system and method for an operation result based on a reconfigurable butterfly unit. The system is applicable to a digital signal processing (DSP) chip. The DSP chip includes a reconfigurable butterfly unit. The reconfigurable butterfly unit may be reconfigured into two modes: a first verification mode and a second verification mode. The system includes: a controller, a memory, a verification unit, a first data gating unit, and a second data gating unit. The technical solution in the present application is used to overcome the disadvantage that an existing verification system and an existing verification method consume large hardware resources, thereby reducing the implementation costs of operation result verification.

Abstract: A vehicle running status field model-based information transmission frequency optimization method in the Internet of Vehicles belongs to the technical field of network communications. The method establishes a running status field model according to the real-time running status of a road vehicle to describe the degree of risk of the vehicle, the degree of risk can be used to dynamically adjust the transmission frequency of safety-critical information, and the transmission frequency of non-safety-critical information is adjusted through the real-time transmission frequency of safety-critical information to achieve the purpose of improving the utilization ratio of link. The method establishes the running status field model of a moving vehicle, uses the risk intensity of the vehicle in the running status field to describe the current running risk of the vehicle, and takes account of different application scenarios, thereby having generality.

Abstract: A radiation resistant high-entropy alloy is provided, having an FCC structure, defined by general formula of FeCoNiVMoTixCry, where 0.05?x?0.2, 0.05?y?0.3, x and y are molar ratios. The radiation resistant high-entropy alloy has excellent irradiation resistance and is subject to radiation hardening saturation at high temperature (600° C.) in a condition of a high dose (1-3×1016 ions/cm2) of helium ion irradiation. A lattice constant of the high-entropy alloy decreases abnormally after irradiation. The high-entropy alloy has a radiation resistance far higher than that of a conventional alloy and has an excellent plasticity and specific strength. In an as-cast condition and at room temperature, a tensile break strength of the high-entropy alloy is higher than 580 MPa, an engineering strain (a tensile elongation) of the high-entropy alloy is greater than 30%.

Abstract: The embodiments of the present disclosure provide a method and system for patrolling an expressway by unmanned aerial vehicles (UAVs). The method is applied to the system including a control center, a plurality of UAVs and a plurality of advertising board charging base stations. The method firstly receives unmanned aerial vehicle (UAV) status information sent by the plurality of unmanned aerial vehicles and road section patrolling data through the control center, and receives advertising board charging base station information sent by the plurality of advertising board charging base stations, then classifies, stores and analyzes the received data and information, and finally generates and sends control commands for the UAVs and charging advertising boards.

Abstract: Provided is a stable flight control method for a multi-rotor unmanned aerial vehicle based on finite-time neurodynamics, comprising the following implementation process: 1) acquiring real-time flight orientation and attitude data through airborne sensors, and analyzing and processing kinematic problems of the aerial vehicle through an airborne processor to establish a dynamics model of the aerial vehicle; 2) designing a finite-time varying-parameter convergence differential neural network solver according to a finite-time varying-parameter convergence differential neurodynamics design method; 3) solving output control parameters of motors of the aerial vehicle through the finite-time varying-parameter convergence differential neural network solver using the acquired real-time orientation and attitude data; and 4) transmitting results to speed regulators of the motors of the aerial vehicle to control the motion of the unmanned aerial vehicle.

Abstract: A method for extracting f wave from a single-lead electrocardiography signal is provided. The method includes: establishing a two-channel temporal convolutional neural network model, including two coding submodules, two mask estimation submodules, an information fusion module and two decoding submodules; constructing a training data set of ECG signals; training the two-channel temporal convolutional neural network model, and saving the trained model. The two-channel temporal convolution neural network encodes and decodes a QRST complex and the f wave respectively, and uses a mask of information fusion to estimate and construct regular items to restrict a distribution difference of QRST component coding features, so as to reduce the distortion of the QRST complex, select potential features of a QRST complex and f wave with high signal-to-noise ratio, and thus improve a detection accuracy of the f wave.

Abstract: The invention discloses a cavity-based dual-band filtering balun, which includes a first cavity resonator and a second cavity resonator which are connected by a metal plate, the first cavity resonator is provided with an input PCB board, a metal ground layer of the input PCB board is provided with an input through line, the other side of the input PCB board is provided with an input microstrip line, and the first cavity resonator is provided with an input slot corresponding to a position of the input through line; and two opposite outside surfaces of the second cavity resonator which are adjacent to the metal plate are each provided with an output PCB board, metal ground layers of the two output PCB boards are respectively provided with an output through line, the other sides of the two output PCB boards are each provided with an output microstrip line, and the second cavity resonator is provided with an output slot corresponding to a position of the output through line and communicated with the output throug

Abstract: A transmission shaft assembly for use in a sequential test of flexible thin-walled bearings includes a power connecting member, a clamping device and a plurality of bearing mounting kits. The bearing mounting kits are located between the power connecting member and the clamping device. The clamping device penetrates a central bore of each of the bearing mounting kits and is connected to the power connecting member. The power connecting member, the clamping device and the bearing mounting kits are connected into one piece. The power connecting member includes a spindle shank and a blind rivet. The bearing mounting kit includes a bearing mounting sleeve seat, a rear retaining ring, a front retaining ring, a bearing locking bolt and a tightening nut. The clamping device includes a clamping bolt, a washer and a spring washer.

Abstract: A manufacturing process of a high-strength aluminum alloy wire/strip includes the following steps: A. subjecting an alloy to smelting and spray forming to obtain a high-strength Al—Zn—Mg—Cu aluminum alloy blank; B. subjecting the blank to semi-solid upset forging to form an ingot; C. subjecting the ingot to hot extrusion and then to vacuum annealing to form a coiled material; D. subjecting the coiled material to hot continuous rolling to obtain a wire blank; and E. subjecting the wire blank to solution heat treatment, multiple stretching treatments, annealing, and multiple continuous stretching treatments to obtain the high-strength aluminum alloy wire/strip. The high-strength aluminum alloy wire/strip has the characteristics of fine and compact grains, uniform structure, clear grain boundaries, no precipitates, and no layered structure affecting the stretching performance.

Abstract: The present invention discloses a micro-sized face-up LED device with a micro-hole array and preparation method thereof. The LED device is prepared based on a GaN-based epitaxial layer and includes a GaN-based epitaxial layer, a current spreading layer, a P electrode, an N electrode and a passivation layer; the GaN-based epitaxial layer including a substrate, an N-type CaN layer, i.e., an N-GaN layer, a multiple quantum well layer (MQW), and a P-type GaN layer, i.e., a P-GaN layer; and the N-GaN layer including an etched exposed N-GaN layer and an etched formed N-GaN layer. The present invention improves luminescence efficiency while ensuring the device modulation bandwidth; and after the micro-hole array is etched by ICP, a sample continues to be etched by using the current spreading layer etching liquid to prevent the leakage caused by the expansion of the current spreading layer in the etching process.

Abstract: The present invention discloses a high-linearity GaN-based millimeter wave device and preparation method thereof.

Abstract: The present invention relates to a method for preparing 7?-methyl-19-aldehyde-4-androstene-3,17-dione by electrocatalytic oxidation. The method specifically includes: adopting an H-shaped electrolytic cell for reaction, in an anode chamber, using a metal oxide catalyst as a working electrode, using 7?-methyl-17,19-dihydroxy-4-androstene-3-one as a reaction substrate, and dissolving it in a mixed solvent to be used as an anolyte, and adding nitroxide radicals to be used as a medium; and in a cathode chamber, using a platinum sheet as a counter electrode, using a weakly alkaline solution as a catholyte, carrying out an electrocatalytic oxidation reaction in a constant temperature water bath, adding an organic solvent at the end of the reaction for extraction to obtain an organic extract liquor, and taking an organic layer and carrying out distilling under a reduced pressure to obtain 7?-methyl-19-aldehyde-4-androstene-3,17-dione.

Abstract: A coupling-offset path branch and a high-isolation millimeter-wave phased array antenna based on the same. The high-isolation millimeter-wave phased array antenna includes a plurality of radiating stacked microstrip patch elements, a shielding metal wall, several coupling-offset path branches, a metal ground plane, a feeding network layer, several ports, wherein the first port is excited, energy of the feeding network layer is coupled to a corresponding radiating stacked microstrip patch element through an I-shaped slot, and the energy is transmitted to the second port adjacent to the first port through an inherent coupling path portion; the coupling-offset path branch is introduced to offset the inherent coupling, thus achieving a high-isolation performance between the first port and the second port. By adopting the simple decoupling branch, the invention can achieve a high-isolation effect in a wide band, improve an active standing-wave ratio and a scanning capability of the array antenna.

Abstract: The present disclosure relates to a method for constructing a trehalose polyenzyme complex in vitro by mediation of an artificial scaffold protein, which mainly comprises the following steps: constructing a recombinant bacterium WB800n-ScafCCR for self-assembled scaffold protein module; constructing a recombinant bacterium WB800n-P43-phoD-treY-Ccdoc for self-assembled catalytic module; constructing a recombinant bacterium WB800n-P43-phoD-treZ-Ctdoc for self-assembled catalytic module; constructing a recombinant bacterium WB800n-P43-phoD-cgt-Rfdoc for self-assembled catalytic module; secretorily expressing the recombinant bacteria and self-assembling in vitro to obtain a recombinant trehalose multi-enzyme complex. The trehalose multi-enzyme complex constructed by the method of the present disclosure has a higher catalytic efficiency in preparing trehalose than that of mixed free enzymes, and the method can be used for production of high quality trehalose after immobilization with cellulose microspheres.

Abstract: A device for measuring liquid sloshing force of a ship transporting liquid. The device includes a first cuboidal frame; a second cuboidal frame; a rotating mechanism; a dynamometer; and a liquid tank disposed in the second cuboidal frame. The second cuboidal frame is pivotally connected to the first cuboidal frame via the rotating mechanism. The first cuboidal frame includes a first horizontal plane frame, a second horizontal plane frame, a plurality of upright tubes connecting the first horizontal plane frame and the second horizontal plane frame, and an X-shaped support rod disposed between the first horizontal plane frame and the second horizontal plane frame. The second cuboidal frame includes a third horizontal plane frame including two longitudinal beams and two transverse beams, a longitudinal U-shaped bar disposed between the two transverse beams, and a plurality of transverse U-shaped bars disposed between the two longitudinal beams.

Abstract: An organic glass includes an acrylic plate, a methyl methacrylate layer, and a fluorescent bubble layer that are sequentially stacked; and the fluorescent bubble layer is prepared from fluorescent polymethyl methacrylate beads, a first methyl methacrylate prepolymer and a second methyl methacrylate prepolymer. The fluorescent polymethyl methacrylate beads added into the raw material of the organic glass have an expandable characteristic, and can generate bubbles according to a design pattern to achieve the purpose of controllable bubbles, and the added fluorescent polymethyl methacrylate beads show fluorescent green under ultraviolet irradiation, giving bubbles a fluorescent color, and enabling the organic glass to have extremely artistic and decorative effects.

Abstract: A high-resolution processing method for seismic data based on inverse multi-resolution singular value decomposition includes the steps of: step 1: obtaining a single-trace seismic signal X as a raw signal; step 2: decomposing the seismic signal by using MRSVD algorithm to obtain a series of detailed singular values and inversely recursing the detailed singular values layer by layer to obtain a new detailed signal and an approximate signal; and step 3: sequentially superimposing the new detailed signal on the raw signal, layer by layer, to compensate the high-frequency component of the seismic signal so as to obtain a high-resolution seismic signal.

Abstract: The invention discloses a coupled free vibration wind tunnel testing device with adjustable frequency ratio of torsional-vertical vibration, belonging to the technical field of bridge wind tunnel testing device. The device includes rigid testing model, lightweight rigid rods, lightweight rigid circular hubs, thin strings, linear tensile springs, carbon fiber ropes, and lightweight small hubs. The invention adjusts the torsional stiffness of the system by conveniently changing the diameter of the small hub, the diameter and length of the carbon fiber rope, etc. The device has the advantages of simple structure, convenient installation and avoiding the previous tedious work. It can achieve a variety of torsional-vertical vibration frequency ratio testing conditions by using only one diameter large hub.

Abstract: The present invention relates to a slanting-bed feed processing machine tool of a large propeller. The machine tool comprises a slanting column feed bed, a machine tool spindle, a workpiece rotary worktable, a large propeller and a bed feed mechanism. The present invention coordinates the geometrical relationship between the machine tool and the large propeller to ensure that the slanting column feed bed moves between two blades, thereby reducing the overhang length of the spindle. Different forms of workpiece rotary worktables and bed feed mechanisms are selected according to different slanting column feed beds. Four types of slanting column feed beds are designed, which can be selected, optimized and applied for different processing objects. The present invention enhances the processing stiffness of the spindle and solves the problem of poor processing quality of the large propeller caused by machine tool vibration.

Abstract: A multiwavelength-light-radiating apparatus (1) includes: a light source (11) that radiates continuous light (Lc); a diffracting part (12) that diffracts the continuous light (Lc) into numerous monochromatic lights (Lm), whose wavelengths differ from one another, and emits the numerous monochromatic lights (Lm); numerous optical waveguides (2) that respectively transmit the numerous monochromatic lights (Lm) emitted from the diffracting part (12) from incident ends (21) to output ends (22) where the numerous monochromatic lights (Lm) are respectively emitted; and a sample-placement part (3) that holds numerous samples such that the output ends (22) of the numerous optical waveguides (2) respectively oppose the samples. The numerous monochromatic irradiation lights, whose wavelengths differ from one another, are arranged to be radiated simultaneously onto the numerous samples, one light per sample.