32results about How to "The method is simple and intuitive" patented technology

A method for reproducing automobile collision accidents based on photogrammetry and deformation of the outer contour of the vehicle body used in the field of transportation. The three-dimensional numerical model of the same model and intact vehicle outer contour; analyze and compare the benchmark model and the deformation numerical model, and obtain the deformation amount and deformation angle of the feature points; establish the local finite element corresponding to the accident scene environment and the vehicle deformation parts involved in the accident Model; through multiple iterative optimization calculations, under the conditions of set speed and collision angle, the numerical simulation results of the deformation of feature points are consistent with the real collision measurement results, so as to accurately determine the vehicle speed and collision angle at the time of the accident. The invention can realize accident reproduction under the condition of accident scene information, effectively improves the efficiency of accident reproduction, and has more objectivity and intuitiveness.

The invention relates to a method for directly generating digitalized shoe trees by using foot shapes, solving the difficult problem of customizing shoe trees by measuring feet. The method comprises the following steps: (1) selecting shoe tree samples to form a shoe tree sample set; (2) designing gauge points, determining gauge points on each shoe tree sample and then acquiring the positions of the gauge points by using a scanner to obtain gauge point distribution models of the shoe tree samples; (3) aligning the gauge point distribution models of the samples; (4) generating statistic deformation models of the shoe trees; (5) calibrating the parameter of each camera and then acquiring a plurality of images of target foot shapes; (6) calculating the center of gravity of the foot shapes; (7) estimating the sizes of the foot shapes; (8) estimating the direction of the foot shapes; (9) changing individual vectors in the statistic deformation models of the shoe trees according to the plurality of images of the foot shapes until the projection of the models in each image is most identical with the true images of the foot shapes; and (10) outputting digitalized three-dimensional shoe tree models. The invention has the advantages of full automation, high speed and efficiency, simple use, low cost and the like.

The invention puts forward a power battery pack series connection fault diagnosis method. A battery pack is formed via series connection of n battery single cells, and a crossover voltage test method.A battery management system is used for recording battery single cell voltage and battery single cell surface temperature. An MATLAB/simuink is used for simulating adopted power batteries and recording simulation voltage. A mean squared error between experimental and simulation output voltages is calculated to preliminarily determine if voltage exception occurs. If yes, a Z-score is calculated asa voltage detection exception coefficient based on the mean squared error. According to the voltage detection exception coefficient, whether a fault is connection failure or increased internal resistance of single cells; if yes, the fault is determined as a secondary fault, and the rise rate of battery surface temperature is calculated to determine whether the rise rate is greater than a preset threshold value; if yes, the fault is determined as a primary fault. Via the method disclosed in the invention, reliable diagnosis of connection failure of the power battery pack can be realized, increase of contact resistance and increase of internal resistance can be differentiated from each other, only a simple algorithm is needed, and an operating burden of a battery management system can be effectively lowered.

The invention aims to provide a nonsmooth surface fluid friction resistance testing device and a nonsmooth surface anti-drag effect evaluating method. The device comprises a stepper motor, a torque signal coupler, a rotating shaft and a water tank, wherein the stepper motor is connected with the torque signal coupler through a first flexible diaphragm coupling; an output shaft of the torque signal coupler is connected with the rotating shaft through a second flexible diaphragm coupling; a rotating disc is mounted at the end of the rotating shaft, arranged in the closed water tank, and driven by the stepper motor to rotate; the torque signal coupler acquires torque, power and rotating speed signals of the rotating disc, and transmits into a computer; the stepper motor and the torque signal coupler are both fixed on a guide rail; the guide rail is mounted on a supporting table; the rotating shaft is parallel to the guide rail. The device adopts the structure of the rotating disc, so that the processing of the nonsmooth surface structure on the surface of the disc or the implementing of the surface coating is easier and more convenient, and the dismantling of the rotating disc is simpler.

The all-digital main carrier tracking method based on Doppler frequency cancellation belongs to the field of measurement and control communication. From the complex signal after the Doppler frequency difference, the FIR low-pass filter is used to extract the main carrier signal carrying the negative Doppler residual frequency difference information, and the positive and negative cancellation of the Doppler residual frequency difference is completed, so as to achieve the main carrier signal The purpose of carrier tracking. This method overcomes problems such as loop structure and parameter design trouble caused by the traditional method of using a phase-locked loop, Doppler residual error cannot be completely eliminated, etc., and is suitable for tracking the main carrier in the USB measurement and control system.

A 100G QSFP28 SR4 parallel optical transceiver module carries out data recovery processing on 100G electrical signals through a first clock data recovery module so that after continuing to modulate and demodulate the electrical signals after data recovery processing is carried out, an array driving module can drive a laser transmitting module to convert the electrical signals into optical signals, then the optical signals are coupled to an optical fiber and transmitted to a photovoltaic conversion module, the photovoltaic conversion module converts the received optical signals into electrical signals, four paths of 25G electrical signals output by a master control end are converted into four paths of 25G parallel optical signals through the photovoltaic conversion module, consequently, the 100G electrical signals are propagated in the form of the optical signals, an optical multiplexer is not needed, thus the size of the 100G QSFP28 SR4 parallel optical transceiver module is reduced, and the manufacturing technology is simplified. In addition, the invention provides a packaging method of the 100G QSFP28 SR4 parallel optical transceiver module.

The invention relates to a device and method for measuring the aperture of foamed aluminum, in particular to a device and method for measuring the aperture of foamed aluminum based on machine vision. The device comprises an image capture working machine, an optical fiber signal transmitter and a computer, wherein the upper surface of the image capture working machine is provided with an X-axis working table; a Y-axis working table is arranged below the X-axis working table; an upright post is arranged at one side of the image capture working machine; and photographing equipment is arranged at one side of the upright post opposite to the working table. The invention aims to disclose a method for measuring the aperture of the foamed aluminum or foamed aluminum alloy by using the machine vision, namely an image of a sectional aperture condition of the measured foamed aluminum is directly acquired through a camera and then is transmitted to the computer; and the image is accurately analyzed and calculated by using computer software to obtain the size of the aperture. The method is intuitive, simple and convenient; and errors brought by visual observation can be avoided, so that the data are more accurate and great help is provided for the research of the aperture and the porosity of the foamed aluminum or foamed aluminum alloy.

The invention aims to provide a testing device and a testing device method for evaluating a drag-reduction effect of a bionic jet surface. The testing device comprises a stepping motor, a propeller, a torque signal coupler, a pump and a water tank, wherein the water tank is filled with water, the pump is communicated with the water tank and is communicated with a testing cylinder model through a first pipeline, the water tank is communicated with the testing cylinder model through a second pipeline, and a ball valve is mounted on the first pipeline; the right end of the testing cylinder model is fixed on a bracket, the propeller is arranged in the testing cylinder model, the stepping motor is located at the outer part of the right side of the testing cylinder model and is connected by the propeller by a shaft, and the left end part of the testing cylinder model is connected with the torque signal coupler. According to the testing device, the propeller is utilized for providing power to the speed of a main flow field, so that the flow speed is stable. The testing method is simple and intuitional and provides a reliable result.

The invention belongs to the technical field of the detection system, and discloses an intelligent power transformer operation monitoring system comprising a circuit board, a display screen, groundingbolts, a power panel, an inductor, an antenna device, an SIM card, an intelligent chip, an RS communication board, a bellows connector, a display screen button and manholes. The manholes are inlaid in the upper and lower parts of the monitoring device. The circuit board is arranged exactly below the monitoring device. The display screen is embedded in the middle part of the circuit board. The display screen button is arranged on the lower part of the display screen. The antenna device is welded on the left side of the circuit board. The grounding bolts are arranged on the lower part of the circuit board and distributed on the four feet. The power panel is arranged below the right side grounding bolt. The inductor is arranged on the lower left part of the power panel. The RS communicationboard is arranged on the left side of the inductor. Electrical appliance part cooperative work monitoring can be realized, the operation state of the transformer can be effectively and comprehensivelymonitored and assessed, real-time comprehensive assessment can be performed and the requirements of early warning can be met.

The invention relates to an image registration method and system and an image shooting alignment method and system. The image registration method comprises steps that the feature area in a first imageis projected multiple times to the search area in a second image, the feature area projected in the second image each time defines a matching area, the feature area of the first image comprises multiple first target points, the first target points projected to the matching areas are defined as first target centers, and the search area of the second image comprises multiple second target points; the second target point closest to each of the first target centers in the matching areas is sequentially searched, the distance between each of the first target centers and the closest second target point is defined as a target offset value, the sum of all the target center offset values in the matching areas is defined as a registration value of the matching areas; the matching area with the smallest registration value in the search area is acquired as the feature registration area, a displacement difference between the feature area of the first image and the feature registration area of thesecond image is calculated as the registration offset for registration of the first image and the second image. The method is advantaged in that calculation is relatively fast.

The invention relates to a laser bone processing monitoring and processing method based on optical signal monitoring generated by interaction of a 1 [mu]m femtosecond laser and a bone material. Accurate positioning is achieved by a second harmonic green light signal, and the femtosecond laser processing parameters are quickly optimized according to the change of the optical signal during the processing, and the low-damage and carbon-free bone processing that integrates positioning, processing and monitoring is realized. The method comprises the following steps: 1. cleaning and freezing the bone tissue, 2, indicating the positioning of the second harmonic green light signal generated by low power density femtosecond laser illumination, and 3, adjusting and optimizing the laser processing parameters so that the optical signal is in a state where the green light signal is relatively lowered, and quickly adjusting the laser processing parameters according to the change of the optical signal to complete the femtosecond laser bone processing. The method is expected to be applied to the field of artificial bone and animal bone processing and clinical treatment of bone surgery in vitro.

The invention discloses a facial expression synthesis method based on a generative adversarial network. The method comprises the following steps: firstly, acquiring data of facial expressions, preprocessing the facial expression data, cutting facial images into training data and test data, and manually classifying the training data into different categories according to different facial expressionintensities; then constructing a generative adversarial network, and adding judgment information of expression intensity and associated information between different expression intensities into the network; training and testing the generative adversarial network by using the preprocessed expression data, and adjusting network parameters to optimize the generative adversarial network model; and finally, selecting test data of neutral expressions and inputting the test data into the trained generative adversarial network model to obtain expression images with different intensities. According tothe method, the facial expression images with different intensities can be synthesized through the neutral expression-free facial images, the method is convenient and visual, and the synthesized expression intensity is more vivid and realistic.

The invention provides a method for labeling aeromonas schubertii from snakehead through green fluorescent protein genes. According to the method, a pMDGFP recombinant carrier is constructed and introduced into an aeromonas schubertii virulent strain WL-2. When being observed under a fluorescence microscope, thallus can present green fluorescence. Stability tests show that the plasmid stability rate can be 100% when the WL2GFP passed to thirtieth generation. By means of the green fluorescent protein genes, a simple and visual method for researching the mutual relation between the aeromonas schubertii and a host is provided.

The invention discloses a multi-satellite positioning and orbit determination precision rapid analysis method for space-based space target monitoring, and relates to the technical field of space target monitoring. According to the method, firstly, the multi-satellite positioning error is rapidly analyzed according to the single-station data type, the measurement error and the multi-satellite geometric configuration, then the relationship between the semi-major axis error and the positioning error of short-arc-segment orbit determination is given by utilizing the characteristics of propagation along the track of the orbit, the method is simple, convenient and visual, and quantitative support is provided for the overall design of a space-based space target monitoring system. The method can be suitable for the design of a multi-satellite positioning and orbit determination system for space-based space target monitoring, can also be popularized and applied to the design of a space-ground multi-satellite multi-station combined positioning and orbit determination system, can rapidly and quantitatively evaluate the space target positioning and orbit determination result under different constellation designs, is clear in principle, is simple in calculation, is accurate in evaluation, and can be widely applied to a space-based space target monitoring system.

The invention discloses an automatic cloth folding machine. The automatic cloth folding machine comprises a cloth feeding and conveying mechanism, a second cloth folding mechanism, a folding tool, a third cloth folding mechanism, a fourth cloth folding mechanism, a bottom support, an electrical control cabinet, a first cloth folding mechanism, a PLC control cabinet, an air blowing device and a cloth outlet. According to the automatic cloth folding machine, improvements are made on the basis of a traditional cloth folding machine, a differential speed folding method capable of being used for adjusting the different cloth feeding speeds at the two ends of feeding cloth is developed, and the cloth folding quality can be effectively improved.

The invention discloses a system and method based on an industrial internet platform. The system comprises a data acquisition module and an information issuing terminal which are in signal connection with a data processing module. The data acquisition module is used for acquiring condition information, related to blockage, of at least one branch bin in branch bins of a rotary air preheater; the data processing module is used for determining the blockage level of the rotary air preheater according to the blockage-related condition information and determining whether ash removal measures need to be taken or not according to the blockage level; and the information issuing terminal is used for issuing the processing information of the data processing module, so that a user can obtain specific monitoring information, early warning information and processing suggestions. According to the system and method based on the industrial internet platform, the state information, related to blockage, of the rotary air preheater can be monitored in real time, whether blockage occurs or not and the blockage degree can be obtained according to the monitoring information, corresponding measures can be provided in a targeted mode according to the actual situation, the intelligent level is improved, and safe and stable operation of the rotary air preheater is guaranteed.

The invention provides a rapid and efficient method for induction and propagation of bryophyllum hairy roots. The method includes the following steps that aseptic explants of bryophyllum are infectedwith a wild type GUS-reporter-gene-containing A4 agrobacterium infection solution; 2, after infection, the explants are placed on a resistance-free MS solid culture medium for co-culture under dark conditions, and co-culture is performed in a resistance MS solid culture medium; 3, screening culture is performed on the resistance MS solid culture medium; 4, subculture is performed in the resistanceMS solid culture medium; 5, enlarge cultivation is performed in an MS liquid culture medium; 6, GUS dyeing is performed on the GUS-reporter-gene-containing hairy roots to explore the transformationefficiency. The method is suitable for inducing various bryophyllum hairy roots, and has the advantages that materials are convenient to obtain, the applicability is high, operation is simple and easy, the induction speed is high, the genetic stability is achieved, and the cost is saved.

A method for eliminating a delay effect of a self-powered neutron detector based on a digital circuit comprises the following design steps: according to a physical process of a detector emitter material in a neutron field, writing a relational expression between current I(t) and the number of nuclides and neutron flux density phi(t); solving the impact response of the detector, and carrying out Laplace transformation on the impact response function of the detector to obtain a delay response transfer function G(s) = I(s)/phi(s) of the detector; solving an inverse function to obtain a delay correction transfer function G<-1>(s) = 1/G(s); and designing a digital delay compensation program according to the time domain iterative equation corresponding to each link in the transfer function G<-1>(s) = I(s)/phi(s). The method can correct the delay current signal of the self-powered neutron detector, and overcomes the signal delay caused by the half-life period of intermediate nuclide. Comparedwith a method for correcting signal delay by an analog circuit, the system also has the advantages of flexible parameter adjustment and low possibility of being interfered by external link factors.

The invention discloses a power consumption mode extraction method and system. The method comprises the following steps: establishing a characteristic tuple sequence of a power utilization enterprise,and calculating a distance between two characteristic tuples based on a maximum common subsequence of the characteristic tuple sequence; And performing distance-based clustering on the enterprise power consumption sequence to obtain a power consumption mode of the target industry. The design thought of the maximum common subsequence is adopted, so that the method is more suitable for the situation that the power consumption of enterprises in the same industry is similar, more correct input is provided for extraction of the power consumption mode of a user, and a foundation is laid for constructing a more effective mode extraction model.