13 results about "Linear coefficient" patented technology

The application relates to the technical field of inductive synchro technology, and discloses an inductive synchro temperature self-adaptive compensation method, device and equipment, wherein the method comprises the following steps: determining initial linear coefficients of an initial linear model; acquiring a current environment temperature and a current measurement angle of the inductive synchro, and determining initial iteration parameters of the initial linear model according to the current environment temperature and the current measurement angle; iteratively updating the initial linear coefficients according to the initial iteration parameters to obtain target linear coefficients, wherein data format conversion is performed in each iteration updating process, and the next iteration is performed according to the conversion result; updating the initial linear model based on the target linear coefficients to obtain an updated target linear model, and determining a measurement angle compensation value of the inductive synchro according to the target linear model. The application can realize high-precision and self-adaptive real-time temperature compensation of the inductive synchro in a hot vacuum environment, and simultaneously adapt to the hardware design and reliability requirements of an aircraft.

The embodiment of the invention discloses an infrared band multi-mode calibration method and device. The method comprises the following steps: calculating a point spread function (PSF) of an original infrared image, and generating a spatial response matching filter function (SRMF) according to the PSF; carrying out two-dimensional convolution calculation on the SRMF to obtain an infrared image after effective space calibration; generating a possible spectral response function of ice pollution, and evaluating an optimal ice pollution spectral response through a cross calibration method; according to the optimal ice pollution spectral response, a spectral response function after possible spectral offset is generated, the optimal possible spectral offset is evaluated through a cross calibration method, and a spectral response function after spectral calibration is obtained through optimal sampling; calculating a linear coefficient, a nonlinear coefficient and a constant coefficient of radiometric calibration; and according to each coefficient of radiometric calibration, calculating the radiation quantity of the infrared image after multi-modal calibration. The method can overcome the existing problems and promote the quantification and multi-source fusion application of the satellite infrared data.

The embodiments of the present disclosure disclose an infrared waveband multi-modal calibration method and device. The method comprises: calculating a point spread function (PSF) of an original infrared image, and generating a spatial response matching filter function (SRMF) according to the PSF; performing two-dimensional convolution calculation on the SRMF to obtain an infrared image after effective spatial calibration; generating a possible spectral response function affected by ice pollution, and evaluating an optimal ice pollution spectral response by a cross-calibration method; generating a possible spectral response function after possible spectral shift according to the optimal ice pollution spectral response, and evaluating an optimal possible spectral shift amount by the cross-calibration method, and obtaining a spectral response function after spectral calibration by optimal sampling; calculating a linear coefficient, a nonlinear coefficient and a constant coefficient of radiation calibration; and calculating an infrared image radiation after multi-modal calibration according to the coefficients of radiation calibration and. The method can overcome existing problems and promote quantitative satellite infrared data and multi-source fusion application.

The invention provides a potential evapotranspiration estimation method and system, and the method comprises the steps: substituting corrected potential evapotranspiration observation data into a potential evapotranspiration Penman model based on a wind function, and carrying out the inversion of an equivalent wind function label. And training a machine learning model by using the equivalent wind function label, the meteorological data and the earth surface data, and outputting a nonlinear wind function by using an estimation model based on the meteorological data and the earth surface data of the target station. And replacing a wind function in the potential evapotranspiration model with a nonlinear wind function, and outputting a potential evapotranspiration estimation result based on the potential evapotranspiration model after replacement. By learning an equivalent wind function, dependence on a complex and non-migratable resistance network is partially avoided. By learning a nonlinear wind function, the regional limitation of a traditional linear coefficient is overcome, and robust generalization is guaranteed. A data-driven wind function is embedded into a potential evapotranspiration model in a physical item replacement mode instead of end-to-end black box regression, so that the traceability of model output is ensured, and the model can be butted with an existing service system.

The invention relates to a KAN-based tropical cyclone strength change mechanism analysis method and device, and belongs to the technical field of TC strength change prediction. The method comprises the steps that a factor recursive pruning algorithm based on a KAN2.0 attribution score is adopted, and a high-impact forecasting factor set for TC intensity change forecasting is screened and obtained; performing factor contribution analysis based on symbolization regression by using KAN2.0 trained by a high-impact forecasting factor set, obtaining a complete linear equation from high-impact forecasting factors to TC intensity change, and calculating the TC intensity change according to the symbols and absolute values of various linear coefficients in the equation; and quantitatively analyzing the contribution direction and contribution degree of each high-influence forecasting factor to the TC intensity change. According to the method, the stability, the accuracy, the generalization ability and the interpretability of TC intensity forecasting can be effectively improved.

This invention provides a concrete column deflection measuring device, a concrete column deflection measuring method, and a program that can improve the accuracy of estimating the deflection amount of concrete columns. [Solution] The concrete column deflection measuring device enlarges an image of a concrete column horizontally and receives coordinates for four or more parts of the enlarged concrete column image, including the top and ground level, as specified by the user. Using the image enlargement ratio obtained by horizontally enlarging the image and the conversion ratio of the coordinates of the top of the concrete column corresponding to the ground height of the concrete column, the device calculates the true value of each received coordinate. Based on the complex number corresponding to the true value of each coordinate and the complex number of the inclination angle in the linear coefficient of the cubic equation containing the true value of each coordinate, the device calculates each coordinate as a new coordinate when the ground level is perpendicular to the ground surface. Based on the cubic equation containing the newly calculated coordinates, the device calculates the deflection amount of the concrete column and outputs the calculated deflection amount.

This invention provides a concrete column deflection measuring device, a concrete column deflection measuring method, and a program that can improve the accuracy of estimating the deflection amount of concrete columns. [Solution] The concrete column deflection measuring device enlarges an image of a concrete column horizontally and receives coordinates for four or more parts of the enlarged concrete column image, including the top and ground level, as specified by the user. Using the image enlargement ratio obtained by horizontally enlarging the image and the conversion ratio of the coordinates of the top of the concrete column corresponding to the ground height of the concrete column, the device calculates the true value of each received coordinate. Based on the complex number corresponding to the true value of each coordinate and the complex number of the inclination angle in the linear coefficient of the cubic equation containing the true value of each coordinate, the device calculates each coordinate as a new coordinate when the ground level is perpendicular to the ground surface. Based on the cubic equation containing the newly calculated coordinates, the device calculates the deflection amount of the concrete column and outputs the calculated deflection amount.

The invention provides an orthogonal matching pursuit algorithm-based ultrasonic non-linear metal material microcrack size detection method. The method comprises the following steps: step 1, preparation before detection; step 2, ultrasonic signal emission and reception for microcrack detection; step 3, signal processing and analysis; according to the invention, through a one-transmitting and one-receiving ultrasonic excitation and receiving mode, data processing is carried out on a received signal, so that the size of the microcrack on the surface of the metal material is detected; an orthogonal matching pursuit algorithm is introduced to research an upper computer signal processing method, and accurate calculation of a nonlinear coefficient is achieved. The method has the advantages of high microcrack detection precision, high detection applicability and wide detection range, and is suitable for accurate detection of the microcrack size of the material in service.

The invention discloses a two-stage hysteresis and coupling compensation method and device for a fast reflecting mirror, and solves the technical problem that the existing hysteresis compensation method for the fast reflecting mirror cannot counteract irregular nonlinear errors during compensation, so that the compensation precision is poor. The method comprises the following steps: when hysteresis compensation needs to be carried out on the fast reflecting mirror, constructing a fast reflecting mirror full-stroke hysteresis loop data set and segmenting the fast reflecting mirror full-stroke hysteresis loop data set to obtain a plurality of ascending and descending hysteresis segmentation intervals; constructing a corresponding linear coefficient lookup table based on the intervals; determining parameters such as a current pointing error and a target trajectory angle, and extracting a target local linear coefficient according to a voltage working state; calculating a first-stage compensation voltage and measuring a compensation angle, and constructing LSTM training data; and training the LSTM based on a Bayesian optimization algorithm, testing the fast steering mirror through the trained model in combination with the first-stage compensation voltage, and outputting a final compensation angle.

The invention specifically relates to a method for testing and evaluating the aging performance of a metal oxide resistor disc, and relates to the technical field of performance evaluation of metal oxide resistor discs, and the method comprises the following steps: respectively obtaining a macro-loss value and a micro-loss value after macroscopic and microscopic analysis of a sample, carrying out normalization processing on the macro-loss value and the micro-loss value, and calculating the aging performance of the metal oxide resistor disc; a failure mechanism coefficient is obtained after weighted summation calculation, and a corresponding quality grade is matched based on the failure mechanism coefficient. The method comprises the following steps: constructing a digital twin baseline fusing electricity, a microstructure and thermal characteristics; electrical parameters such as a volt-ampere characteristic curve and a nonlinear coefficient are accurately obtained through standardized testing, microscopic data such as grain morphology and element distribution and thermal characteristic data such as steady-state temperature rise and temperature uniformity are analyzed, and a multi-dimensional reference system is formed; and an accurate reference is provided for aging comparison, and evaluation is ensured to be changed from single-parameter judgment to multi-dimensional comprehensive analysis.

The application discloses a two-stage hysteresis and coupling compensation method and device for a fast mirror, and solves the technical problem that the existing hysteresis compensation method for the fast mirror cannot offset irregular nonlinear errors during compensation, thereby causing poor compensation accuracy. The method comprises the following steps: when hysteresis compensation is needed for the fast mirror, a full-stroke hysteresis loop data set of the fast mirror is constructed and segmented to obtain a plurality of ascending and descending hysteresis segmented intervals; a corresponding linear coefficient lookup table is constructed based on the intervals; parameters such as a current pointing error and a target trajectory angle are determined, and target local linear coefficients are extracted according to a voltage working state; a first-stage compensation voltage is calculated, a compensation angle is measured, and LSTM training data are constructed; the LSTM is trained based on a Bayesian optimization algorithm, the fast mirror is tested by combining the first-stage compensation voltage through the trained model, and a final compensation angle is output.

The invention relates to the technical field of inductosyn, and discloses an inductosyn temperature self-adaptive compensation method, device and equipment, and the method comprises the steps: determining an initial linear coefficient of an initial linear model; the current environment temperature and the current measurement angle of the inductosyn are obtained, and initial iteration parameters of the initial linear model are determined according to the current environment temperature and the current measurement angle; performing iteration updating on the initial linear coefficient according to the initial iteration parameter to obtain a target linear coefficient, and performing data format conversion in each iteration updating process to perform next iteration according to a conversion result; and updating the initial linear model based on the target linear coefficient to obtain an updated target linear model, and determining a measurement angle compensation value of the inductosyn according to the target linear model. According to the invention, high-precision and self-adaptive real-time temperature compensation of the inductosyn in a thermal vacuum environment can be realized, and meanwhile, aircraft hardware design and reliability requirements are met.

A method of operating a microlithographic projection exposure apparatus (10) includes: providing a wave front deviation (50) of the projection lens and determining a control command (42) including travels for the manipulator system for correcting the wave front deviation using a model (60). The model describes the wave front deviation as a function of the travel variables and has a group of offset coefficients (62), which are independent of the travel variables, a group of linear coefficients (64), which are each attributed to one of the travel variables to the power of one, and a group of quadratic coefficients (66), which are each attributed to a product of two of the travel variables or to a square of one of the travel variables. The offset coefficients (62) are calibrated more frequently than are the linear coefficients (64).