75 results about "Radiation model" patented technology

The invention relates to a method for verifying a Mars sky radiance simulation result based on a Mars real-shot photo, and belongs to the technical field of Mars sky background radiance. Comprises: image acquisition; performing radiation calibration; correcting dark current; performing flat field correction; converting a radiation value; and geometric correction. The Mars sky radiance simulation method breaks through the dependence of an existing model on idealized hypothesis, performs dynamic verification by using actual shot image data, remarkably improves the authenticity and reliability of a Mars sky radiance simulation result, and effectively solves the problem of systematic deviation under a specific wave band; by constructing a complete process from image acquisition, radiation calibration, geometric modeling to brightness inversion and comparison verification, dynamic feedback and closed-loop correction of a theoretical radiation model are realized, model adaptability is improved, and fine modeling under multi-temporal and multi-meteorological conditions is supported; the method can be applied to an existing Mars rover navigation camera and an image processing link of the Mars rover navigation camera, does not need additional modification, has good engineering practicability and task compatibility, and is convenient to popularize and apply.

The invention discloses a lithium ion battery thermal runaway propagation modeling method coupled with a semi-empirical flame radiation model, and belongs to the technical field of battery thermal safety. According to the method, thermal runaway jet parameters of the battery are obtained, a single-point source method is adopted to calibrate flame radiation fractions, a solid flame radiation model with a cylinder and a cuboid combined is established, and a radiation heat source is coupled to a three-dimensional thermal runaway propagation model to solve temperature distribution. According to the method, the technical problem that a traditional method cannot give consideration to calculation efficiency and precision is solved, through innovative combination of special geometric simplification and a semi-empirical radiation model, the calculation efficiency is remarkably improved while the model precision is guaranteed, and an efficient and reliable simulation tool is provided for thermal safety design of the lithium ion battery module.

The invention discloses a method for acquiring optimal measurement conditions of building room temperature monitoring. According to the method, a discrete coordinate radiation model is set, a sun tracking function is started at the same time, and wall mixed thermal boundary conditions are considered. Factors influencing the accuracy and stability of room temperature monitoring, such as temperature measurement distance, time, sunshade condition, temperature measurement position, weather condition, window opening and closing, outdoor temperature and room characteristic factors, are explored, so that the influence rule of different factors on the room temperature monitoring of the building is provided. According to the method, accurate modeling is performed according to thermodynamic behaviors in a complex building environment, and complex factors, including thermal conductivity of building materials, indoor air flow and heat source distribution, suffered by the room temperature of a building are considered; under different environmental conditions, dynamic characteristics of a building room temperature change rule are considered, a monitoring scheme is dynamically adjusted based on real-time simulation data to obtain an optimal measurement condition, and the complexity of the system is reduced in a real-time feedback process.

The application discloses a new use of Leonurine or a pharmaceutically acceptable salt thereof in the preparation of a medicament for treating radiation-induced brain injury, specifically, providing a safe and effective therapeutic drug for iron death, neuroinflammation, neuron damage and lipid metabolism disorder accompanying the radiation-induced brain injury, solving the technical problem of lack of specific treatment means in the prior art, and having a wide clinical application prospect. Experiments adopt a C57BL / c mouse 30 Gy whole brain X-ray radiation model, and results show that Leonurine can significantly improve the body weight decrease and survival rate of the model mice, reduce the serum IL-6 and IFN-alpha levels, inhibit the activation of microglial cells in the cerebral cortex and hippocampus, protect and repair damaged neurons, and improve the ultrastructure of mitochondria and synapses; meanwhile, the expression of GPX4 and SLC7A11 proteins in the brain tissue is up-regulated, the GSH content is increased to inhibit iron death, and the levels of GPE, GPS and GPC related to lipid metabolism are restored.

The invention discloses a ship stern bearing interference press-fitting quality prediction method considering complex meteorological conditions. The method comprises the following steps: constructing a full-size multi-physical field simulation model; establishing a fluid calculation environment considering solar radiation; loading temperature field data for structural calculation; simulating a nonlinear contact interference press-fitting process; the press fitting curve, the press fitting contact area, the energy consumption in the press fitting process and the cylindricity error of the stern bearing after press fitting are used as evaluation indexes, and the press fitting failure risk is subjected to multi-dimensional quantitative evaluation. According to the method, the variable characteristics of the real environment temperature and the wind speed serve as the time-varying boundary conditions to be dynamically applied to the model, and quantitative evaluation of the dynamic change of the wind speed on the press-fitting quality is achieved; a solar radiation model and a DO radiation model are set in fluid calculation to realize accurate loading of non-uniform radiation heat flow, so that temperature field distribution of the stern shaft tube is accurately predicted; by constructing a multi-dimensional quantitative evaluation system, various failure risks in the press-fitting process are comprehensively identified.

The invention belongs to the technical field of digital urban and rural and built-up environment simulation, and provides a method for constructing and analyzing a regional urban and rural built-up environment by fusing multi-source data, and the method comprises the steps: obtaining a plane grid base map based on a selected region, and vectorizing the plane grid base map to obtain a two-dimensional building vector diagram; calculating and obtaining a building height base map based on DEM and DSM data, and establishing a three-dimensional building model by using the two-dimensional building vector diagram and the building height base map; a three-dimensional terrain model is obtained based on DEM data, and the three-dimensional building model and the three-dimensional terrain model are combined to form a built environment digital twinborn model of the selected area; and carrying out multi-physics field simulation analysis on the built environment digital twinborn model, realizing multi-physics field coupling simulation by combining a turbulence model, a radiation model and the like, analyzing a simulation result, and displaying analysis data in a visual form. According to the method, multi-source data are efficiently fused, the spatial scale of regional large-scale simulation research is expanded, and multi-physics field coupling analysis and quantitative analysis of a built environment are realized.

The invention particularly relates to a method for calculating non-equilibrium shock wave layer infrared spectrum radiation based on an NO vibration excited state collision-radiation model. The method comprises the following steps: constructing an NO infrared vibration excited state collision-radiation model; extracting flow field data along a certain specific direction, inputting the flow field data into the NO infrared vibration excited state collision-radiation model, and calculating NO vibration excited state particle number density; calculating each vibration state absorption coefficient of NO based on the NO vibration excited state particle number density; and calculating the absorptivity in any layer on the detection path based on each vibration state absorption coefficient in combination with an apparent ray method, and calculating the NO infrared spectrum radiance based on the absorptivity. The method solves the problems that the spectral radiation calculation precision in hypersonic thermodynamics and chemical unbalanced flow is not high, the unbalanced state is not considered in the calculation, and the excited state particle number density adopted in the calculation of the infrared spectral radiation of NO is inaccurate.

The invention belongs to the technical field of antennas and microwaves, and discloses an electromagnetic compatibility simulation method for an electrically large carrier platform array antenna and a medium. According to the method, the FEM-UTD hybrid algorithm is adopted, the far-field directional diagram of the complex-structure antenna is calculated and extracted by using the FEM method, the array antenna equivalent radiation model is accurately established according to the actual position, arrangement, phase and the like of the array antenna by using the extracted far-field directional diagram according to the far-field equivalence principle, and the array antenna equivalent radiation model is used as an array antenna excitation source. And electromagnetic compatibility simulation of the electrically large-size carrier platform array antenna is realized by using a UTD algorithm. On the premise that the precision is guaranteed, the hardware limitation of a full-wave algorithm on the electrically large size problem is broken through, meanwhile, the defects of a pure UTD algorithm on antenna modeling are overcome, and the balance of electromagnetic compatibility simulation among precision, efficiency and cost is achieved.

The application relates to the technical field of antenna array design, and provides a concentric circular array antenna design method based on hybrid DE-GA collaborative evolution, which comprises the following steps: S1, constructing a topological-geometric coupled concentric circular array radiation model; S2, constructing a hybrid coding chromosome and initializing a population; S3, based on the concentric circular array radiation model, performing a hybrid DE-GA collaborative evolution method on the hybrid coding chromosome in the initialized population; S4, calculating fitness and updating a global optimal solution; S5, judging whether a termination condition is met; if the maximum iteration number or error precision requirement is reached, outputting an optimal array element arrangement sequence and a circular ring radius sequence; otherwise, returning to step S3 and continuing iteration. The improved genetic algorithm and the improved differential evolution algorithm are used for collaborative evolution of discrete sparse variables and continuous radius variables respectively, so that global optimal matching of array topology and geometric structure is realized simultaneously in a single optimization process.

The invention discloses a phase-free electromagnetic source inversion positioning method and device based on adaptive sparse sampling, and the method comprises the steps: determining the position of an adaptive sparse sampling point for a to-be-measured electromagnetic source on a near-field scanning plane, so as to obtain the near-field distribution data of the corresponding sparse sampling point; recovering the near-field distribution data into uniform distribution data through an interpolation method, and extracting amplitude information to obtain phase-free data; establishing a forward radiation model of the equivalent electromagnetic source according to the electromagnetic field integral equation model and the mirror image effect, and constructing a corresponding error minimization objective function based on the phase-free data and the forward radiation model; performing iterative optimization on the phase-error-free minimization objective function by using an LM algorithm so as to perform inversion on the electromagnetic source to be measured to obtain equivalent magnetic current source distribution; and reconstructing a magnetic field according to equivalent magnetic current source distribution obtained by electromagnetic source inversion. According to the scheme, efficient reconstruction of the near-field radiation characteristics of the radio frequency circuit can be realized while the number of sampling points is reduced and the inversion precision is ensured.

This invention relates to the field of solar photovoltaic power generation technology and discloses an adaptive angle adjustment method for solar cell modules, comprising the following steps: acquiring average wind speed and original pitch angle signals; performing frequency domain decoupling on the original pitch angle signals; calculating the high-frequency energy integral, low-frequency energy integral, and energy ratio parameter; calculating the actual diffuse reflectance by combining the average wind speed and the high-frequency energy integral; constructing a theoretical radiation model to obtain the optimal target tilt angle; extracting the radiation sensitivity gradient; calculating the tracking error between the actual tilt angle and the optimal target tilt angle; determining the actual dead zone by combining the energy ratio parameter and the radiation sensitivity gradient; and outputting control commands or drive commands based on the relationship between the absolute value of the error, the actual dead zone, and the high and low frequency energy integrals. This invention reduces mechanical wear by dynamically filtering out high-frequency wave disturbances through a dead zone and precisely optimizes the reflectance using high-frequency energy correction to improve power generation, achieving a balance between mechanical loss reduction and power generation benefits.

The invention discloses a finite box rectangular horn shape optimization method and system based on a hybrid model, and the method comprises the steps: carrying out the geometric discretization of a rectangular horn in the axial direction into rectangular pipeline sections which are connected end to end, and determining a to-be-optimized design variable; pre-calculating a radiation impedance matrix and a far-field directivity primary function vector under a finite box body by adopting an external radiation model; calculating an inlet impedance matrix and a speed transmission matrix of each rectangular pipeline section on the basis of a radiation impedance matrix and a current design variable by adopting a sound transmission model in the horn, obtaining a mouth output speed vector, and solving an acoustic performance index in combination with a far-field directivity primary function vector; and constructing a comprehensive objective function, and solving to obtain a finite box rectangular horn shape optimization scheme. According to the method, the edge diffraction and sound reflection effect in a limited box environment can be accurately simulated, and the radiation efficiency optimization and directivity control of the broadband of the rectangular horn are realized while the calculation cost is remarkably reduced.

The invention relates to an ultrasonic hollow plane array focusing method based on pseudo-inverse matrix solution, and belongs to the technical field of man-machine interaction and virtual reality. Based on a sound pressure radiation model of a circular piston, sound pressure distribution characteristics generated by a single emitter in a sound field are established, a mathematical relationship between the total sound field sound pressure of the whole array and excitation amplitudes of all the emitters is derived on the basis, and an ideal sound field distribution target is set, so that the sound field of the array is obtained. And inversely solving the optimal amplitude configuration of each transmitter by adopting a pseudo-inverse matrix algorithm so as to control the sound field. The method is used for solving the problems that focusing energy is dispersed and the focus shape tends to be oval due to the fact that the side lobe is too large during single-point focusing of the hollow plane ultrasonic array, the side lobe level is remarkably restrained, the focus energy concentration ratio and shape regularity are improved, and the focusing performance of the hollow plane array is effectively improved.

The application discloses a satellite remote sensing data collection and preprocessing method and system, and relates to the technical field of satellite navigation. The method specifically comprises the following steps: collecting remote sensing images of a semiarid region through a satellite, analyzing pixel radiation and brightness gradient to identify bare land water features, constructing a leading atlas, extracting a boundary and registering to generate a standard structure, combining a climate model to correct to generate a reflectivity layer, transferring instructions when parameters are insufficient, reconstructing a queue by using a shortest algorithm to complete radiation calibration, atmospheric correction and geometric registration, and forming a preprocessing layer set. In the application, multi-band division is combined with radiation gradient calculation to enhance the separation degree of ground objects, boundary feature extraction and geometric registration are used to eliminate imaging distortion, a dynamic radiation model is fused with climate parameters to correct reflectivity, a double-threshold value is monitored to optimize a transmission strategy and avoid interruption, a priority algorithm is used to reconstruct a queue to reduce data delay, multi-level quality control is used to cooperatively process to form standard data, and the temporal and spatial reliability and application value are improved.

The invention discloses a pose calibration method, device and equipment based on Gaussian radiation and a storage medium, and the method comprises the steps: carrying out the image collection of a target calibration motif based on target calibration equipment, and generating a target motif image sequence; and based on a pre-trained Gaussian radiation model, performing image matching on the motif images in the target motif image sequence, and performing pose calibration on the target calibration device at a collection view angle corresponding to the motif image according to an imaging pose, corresponding to the matched motif image, in the Gaussian radiation model. According to the technical scheme, the flexibility and the stability of geometric pose calibration of the calibration equipment are improved.

The application discloses a helium spectrum imaging system suitable for a magnetic confinement fusion device, which comprises a jet pipeline, a relay optical path system, a monochromatic gas-filled imaging system, a polychromatic spectrometric system and a high-speed camera system or a photoelectric conversion detector array system. The jet pipeline sprays helium to form a gas cloud object surface, and the monochromatic gas-filled imaging system and the polychromatic spectrometric system respectively image the object surface to a specified region of a photosensitive surface of a high-speed camera. The monochromatic gas-filled imaging system images spectral lines of a specific wavelength in the object surface image to the photosensitive surface of the high-speed camera, and obtains high-time-resolution evolution of the object surface image; the polychromatic spectrometric system images spectral lines of four specific wavelengths in the object surface image to a photosensitive surface of another high-speed camera, and can obtain electron temperature and density in combination with a collision radiation model. The application increases the spectrometric system available for electron temperature and density measurement, and greatly improves the diagnostic capability.

The invention discloses a high-rise tower temperature field calculation method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of building structure health monitoring, and the high-rise tower temperature field calculation method comprises the steps: building a radiation model of a tower and radiation heat exchange data of the tower according to structural parameters of the tower; acquiring real-time meteorological data and historical meteorological data; determining wind field distribution data of the structural surface of the tower drum according to the real-time meteorological data; according to the wind field distribution data, convective heat transfer data of the tower drum are determined; determining radiation intensity data and radiation angle data of the sun according to the real-time meteorological data and the historical meteorological tree; and according to the radiation model, the radiation heat exchange data, the convective heat exchange data, the radiation intensity data and the radiation angle data, determining temperature distribution data of the tower. According to the invention, the accuracy of thermal analysis of the tower drum is improved.

The application discloses a kind of wide-band photoelectric telescope detection ability high-precision calculation modeling methods, belong to photoelectric measurement technical field.The method is by the spectral integration of target photon flux density, system response and noise source in the whole detection waveband, accurately calculate signal electron number, background electron number and total noise, and then solve system signal-to-noise ratio (SNR).Specifically include: based on target apparent magnitude and blackbody radiation model calculation photon flux density;Integral calculation signal electron number and background electron number;Comprehensively consider photon noise, dark current noise and readout noise, integral solution total noise;Finally, based on the integral result, calculate signal-to-noise ratio.The application overcomes the deficiency of traditional average wavelength approximation method, significantly improves the signal-to-noise ratio calculation precision, and is suitable for the design and performance evaluation of different photoelectric systems.

The invention provides a photovoltaic extreme output prediction model construction method and system and an extreme output prediction method and system, and relates to the technical field of intersection of photovoltaic power generation and atmospheric science. The method comprises the following steps: for each photovoltaic cluster in a target area, dynamically determining an extreme output condition threshold and a plurality of extreme output moments based on meteorological change conditions and meteorological stability of a place where the photovoltaic cluster is located; weather classification clustering processing is carried out on various satellite remote sensing meteorological data based on the extreme output moment; performing statistical analysis on each meteorological element of each weather type to obtain typical meteorological characteristics of each weather type; constructing a photovoltaic output calculation model based on the radiation model, the photovoltaic array model and the inverter efficiency model; and obtaining a photovoltaic extreme output prediction model by combining the typical meteorological characteristics corresponding to the weather types. According to the invention, the problem that the photovoltaic output prediction accuracy and reliability of the distributed photovoltaic extreme output scene are low is solved.

The present application relates to the field of weather forecast and new energy technology, and discloses a physical-data fusion cloud amount constraint radiation prediction system. The system processes real-time weather station data and satellite cloud images through a data acquisition and field construction module to generate gridded weather element fields and cloud amount grid fields. A clear sky radiation prediction module and a cloud amount constraint prediction module are based on a clear sky radiation model and a Liu-Jordan model respectively, and parallel computing is performed to obtain gridded clear sky solar radiation prediction values and cloud amount constraint solar radiation prediction values. A multi-model integrated prediction module fuses the two kinds of prediction values. A grid correction and product generation module determines the optimal fusion weight of the two kinds of models through a grid search scheme, performs global grid correction in combination with real-time observation data, and generates high-precision kilometer-level solar radiation grid prediction products. The present application fuses the advantages of double physical models and optimizes the grid prediction accuracy through data-driven dynamic correction.

The invention relates to an intelligent street lamp turn-on control method and system considering special meteorological factors, and the method comprises the steps: calculating reference radiation based on an NARP clear sky net radiation model, and carrying out the real-time collection of precipitation, visibility and relative humidity data through an automatic meteorological station; and dynamically generating a meteorological adjustment coefficient through sliding window statistics and a logarithm-linear scaling algorithm, and comprehensively adjusting the reference radiation to obtain the actual received radiation intensity of the earth surface. And when the adjusted radiation value is lower than a preset threshold value, a street lamp turn-on instruction is automatically triggered. According to the method, expensive sensors do not need to be added, and the attenuation influence of special weathers such as rainstorm and low visibility on illumination can be accurately quantified only by using conventional meteorological data. Actual measurement shows that the method reduces the root-mean-square error of the turn-on time to 8.2 minutes, obviously solves the problem that the turn-on of the street lamp lags behind or is too early in special weather, has the advantages of high precision, low cost and easy popularization, effectively guarantees traffic safety and saves energy.

The invention discloses a standard hydrophone sensitivity phase measurement method based on model parameter characteristics, which is different from a traditional standard hydrophone phase measurement method and provides a new idea for measuring the sensitivity phase of a standard hydrophone by using a model. According to the working characteristics of a standard hydrophone, a propagation model, a sound scattering model, a piezoelectric vibration model and a radiation model are established, a measurement system is used for measuring inherent attributes such as the diameter and no-load impedance of the standard hydrophone, the inherent attributes are substituted into the models, and phases of all the models are obtained. And obtaining the phase of the hydrophone sensitivity according to the relationship between the phase of the hydrophone sensitivity and each model. The beneficial effects of the invention are that the method can make up the defects that the measurement process of a current standard hydrophone is complex, and the phase is liable to be affected by factors such as space positioning distance errors.

The invention discloses a block adjustment-based color homogenizing method, system and product in remote sensing image splicing, and the method comprises the steps: firstly determining a measurement region, and building a radiation model for a to-be-corrected remote sensing image through employing a second-order polynomial; constructing an error matrix according to the radiation consistency constraint of the overlapping region of the remote sensing image; then, considering overlapping regions of all remote sensing images in the measurement region, and establishing a block adjustment model matrix; solving a quality weight matrix by comprehensively considering three quality factors including the number of pixels, the standard deviation and the hue matching degree; using a least square method to minimize the sum of squares of the weighted residual error, and solving a parameter vector; and finally, substituting the parameter vectors, and carrying out radiation correction on each to-be-corrected remote sensing image in the measurement area one by one to complete color homogenization. According to the method, accumulative errors of multiple remote sensing images in the color uniformizing process can be eliminated to a great extent, so that color uniformizing of the multiple remote sensing images has global consistency, and the color uniformizing method in remote sensing image splicing is better than an existing method.

The application discloses a monomer building photovoltaic resource measurement method and system based on a parameterized model library, and is applied to the technical field of intelligent analysis, and the method comprises the following steps: constructing a basic solar radiation model library of a target region; acquiring three-dimensional data of a target building and surrounding buildings of the target building in the target region, and identifying all effective shelter buildings; identifying a radiation influence coefficient of each effective shelter building on the surface of the target building at different time periods through the basic solar radiation model library, and superimposing the radiation influence coefficients of all the effective shelter buildings to form a total radiation influence coefficient; and analyzing a region where photovoltaic components can be installed on the target building according to the total radiation influence coefficient. The application solves the inherent defects of high calculation cost and weak shelter influence evaluation of the existing method by using the standardized basic solar radiation model library, and provides core tool support for scientific deployment of monomer building photovoltaic.

The application discloses a temperature calculation method and device for a ground parking target, and belongs to the field of temperature generation. The method comprises the following steps: performing spatial division on a geometric model of a to-be-detected target according to a triangular facet, so as to obtain a plurality of control units; establishing a heat flow model of each control unit according to environmental data of the to-be-detected target; wherein the heat flow model comprises a heat conduction model, a convection model and a radiation model; and solving the heat flow model of each control unit according to a preset heat balance constraint, so as to obtain a temperature distribution result of the to-be-detected target. The application can solve the problem of low calculation precision of the temperature of a traditional ground parking target.

The invention discloses a solar irradiance scene generation method considering multiple time dimensions and a related device, and the method comprises the steps: obtaining the extraterrestrial radiation data of a target geographic position, and constructing a daily clearness index sequence based on the extraterrestrial radiation data of the target geographic position; obtaining a symbolic aggregation approximate sequence; a plurality of types of daily clear sky state DCS are obtained; constructing a state transition vector, and generating a DCS sequence of multiple consecutive days based on the state transition vector and a plurality of types of day clear sky state DCS; in each type of daily clear sky state DCS in the DCS sequence, randomly selecting a corresponding SAX symbol sequence, generating a daily definition index sequence according to conditional probability distribution corresponding to each symbol in the selected SAX symbol sequence, substituting the daily definition index sequence into a clear sky radiation model, and calculating to obtain intraday hourly total radiation data, the solar irradiance scene is constructed based on the intraday hourly total radiation data, the method and the related device generate the solar irradiance scene, and the scene authenticity and diversity are high.

This invention discloses a NOx control method for a chain grate rotary kiln based on multi-source fuel utilization. This method, targeting different levels of environmental warnings and ultra-low emission requirements, first establishes a solid fuel combustion characteristic database including anthracite, bituminous coal, and their blends based on industrial analysis, elemental analysis, and thermogravimetric experiments. Simultaneously, it employs CFD numerical simulation technology, coupling an Eulerian-Lagrange multiphase flow model and a P-1 radiation model, to analyze the flow field and NOx formation patterns under pulverized coal and natural gas co-firing conditions. Upon receiving control commands, it calculates the inlet concentration threshold based on the real-time efficiency of the denitrification system, intelligently recommends the optimal fuel ratio using the multi-source database, and outputs corresponding kiln tail temperature, combustion air volume, and raw material structure control parameters. This invention, through a dual approach of "experimentation + simulation," achieves the suppression of fuel-type and thermal NOx formation at the source, meeting differentiated environmental indicators while ensuring stable production.

The invention discloses a method and a system for measuring and calculating photovoltaic resources of a single building based on a parameterized model library, which are applied to the technical field of intelligent analysis, and the method comprises the following steps: constructing a basic solar radiation model library of a target area; obtaining three-dimensional data of a target building in the target area and surrounding buildings of the target building, and identifying all effective shielding buildings; identifying radiation influence coefficients of each effective shielding building on the surface of the target building in different time periods through the basic solar radiation model library, and superposing the radiation influence coefficients of all the effective shielding buildings to form a total radiation influence coefficient; and according to the total radiation influence coefficient, analyzing an area where the photovoltaic module can be installed in the target building. According to the method, the inherent defects that an existing method is high in computing power cost, weak in shielding influence evaluation and the like are overcome through the standardized basic solar radiation model library, and core tool support is provided for scientific photovoltaic deployment of a single building.

The application discloses a kind of measurement method and measurement system of the spectral distribution of PAR, including by the geometric calibration and radiation calibration of all-sky imager, the observation zenith angle and observation azimuth of each pixel of all-sky image and RGB waveband radiance value are acquired;Through cloud detection algorithm, all-sky image is divided into clear sky and cloudy condition;For clear sky all-sky image, combined with radiation transfer model, PAR spectral radiation distribution algorithm reconstruction is carried out to obtain the spectral distribution of PAR;For the image with cloud, a deep learning model is used to obtain the spectral distribution of PAR, and finally the spectral distribution of the whole PAR is obtained.The application has the advantages that: the spectral distribution of PAR is reconstructed using all-sky image, and by combining physical radiation model and deep learning model, the spectral irradiance of visible light band reaching the ground, i.e.PAR spectral distribution information, is obtained from the image captured by all-sky imager.

The invention relates to the technical field of underwater acoustic transducer testing, in particular to a low-frequency bending disc transducer sound source level testing method which measures the vibration displacement amplitude of a transducer through a vibration displacement real-time testing system and calculates the sound source level based on a uniform pulsation spherical surface sound radiation model. According to the invention, a standard hydrophone and a large-scale testing platform are not needed, the testing process is simplified, the efficiency is improved, and the method is suitable for batch testing of low-frequency and multi-depth bending disc transducers.