31 results about "Regularization algorithm" patented technology

The invention belongs to the technical field of boiler heating surface high-temperature corrosion monitoring, and relates to a boiler heating surface temperature monitoring method and system based on dynamic heat flux density monitoring. The method comprises the steps of obtaining temperature field data of a plurality of monitoring areas of a boiler heating surface; constructing an improved Tikhonov regularization algorithm based on the temperature field data, and carrying out heat flow field reverse solution by adopting the improved Tikhonov regularization algorithm to obtain reconstructed heat flow field distribution and a heat conduction nuclear matrix after regularization optimization; and generating a temperature evolution trend by adopting a GRU prediction model based on an attention mechanism based on the reconstructed heat flow field distribution and the regularized and optimized heat conduction nuclear matrix. The method can accurately predict the temperature evolution trend through obtaining the comprehensive temperature field data, facilitates the real-time monitoring of the temperature of the heating surface of the boiler, and improves the safety and reliability of the operation of the boiler. Operation personnel can adjust operation parameters in time according to a prediction result, and the operation state of the boiler is optimized.

The invention relates to the technical field of model construction, in particular to a heart model construction method based on multiple physical fields and geometric multiple scales, which comprises the following steps of: performing segmentation processing and three-dimensional model reconstruction on a heart image to generate an initial heart geometric model; performing anisotropic attribute assignment on the initial heart geometric model based on a regularization algorithm to obtain a myocardial tissue structure; embedding a cell electrophysiological model into the computational grid of the myocardial tissue structure through parameter mapping to output a heart model with multi-scale geometric characteristics; an electrophysiological field equation, a mechanical field equation and a heart fluid dynamic field equation are constructed respectively, and coupling among multiple physical fields is achieved; determining whether the feature weight of the myocardial tissue structure texture needs to be increased or not; determining whether the transition function width of cell electrophysiological model parameter mapping needs to be increased or not; and determining a pressure feedback relaxation factor in the coupling iteration. The stability of heart model construction is improved.

The invention provides a multi-source data fusion industrial energy-saving management system based on big data, and the system comprises a data collection and edge processing module which is used for collecting on-site multi-source heterogeneous data in parallel and executing filtering and time calibration; the industrial big data storage center is used for storing data by adopting a cold and hot data layered architecture; the spatio-temporal data deep fusion engine is configured to be used for constructing a virtual production takt axis, mapping a continuous energy consumption waveform to the axis by using a nonlinear time warping algorithm, eliminating time lag interference and generating a standard energy consumption fingerprint in combination with a thermal response model; the dynamic energy-saving decision control module is used for calculating a transient energy consumption balance index covering recovery compensation and life loss based on the fingerprint vector, and generating a control instruction when an energy-saving gain threshold value is met; and the terminal execution feedback module is used for instruction issuing and feedback. According to the method, the problem of spatial-temporal dislocation of discrete work orders and continuous energy consumption data is solved, and refined dynamic energy-saving control of equipment is realized.

The present application relates to the technical field of model construction, and particularly relates to a heart model construction method based on multi-physical field and geometric multi-scale, comprising: carrying out segmentation processing and three-dimensional model reconstruction on a heart image to generate an initial heart geometric model, carrying out anisotropic attribute assignment on the initial heart geometric model based on a regularization algorithm to obtain a myocardial tissue structure; embedding a cell electrophysiology model into a calculation grid of the myocardial tissue structure through parameter mapping to output a heart model with multi-scale geometric characteristics; respectively constructing an electrophysiology field equation, a mechanics field equation and a heart fluid dynamics field equation to realize coupling between the multi-physical fields; determining whether the feature weight of the myocardial tissue structure texture needs to be increased; determining whether the transition function width of the cell electrophysiology model parameter mapping needs to be increased; and determining a pressure feedback relaxation factor in the coupling iteration. The present application improves the stability of heart model construction.

The invention belongs to the technical field of seismic exploration, and relates to a strong interference seismic data seismic source function inversion method based on transverse local regularization, and the method comprises the steps: applying transverse local regularization constraint in a seismic source function waveform inversion process to guarantee the transverse continuity and precision of an inversion result; the nonlinearity of inversion and the degree of dependence on a speed model are reduced by using near-channel short-time data, and the overall calculation efficiency of the algorithm is ensured; seismic source function inversion is carried out under a full-waveform inversion framework, and an inversion result theoretically has the advantages of high precision and high resolution; the advantages of a cross-correlation objective function and a transverse local regularization algorithm are combined, a high-quality seismic source function inversion result can be obtained under the condition of strong interference, the transverse continuity of the inversion result is enhanced by utilizing mutual constraint between adjacent seismic source functions, and the problem of dependency of an initial seismic source is overcome to a large extent. According to the method, a seismic source function inversion result with high precision and good transverse consistency can be stably obtained under the condition that strong interference exists in seismic data.

The application discloses a kind of based on neural network's semi-batch reaction thermal behavior identification method, first define thermal behavior label, solve dimensionless mathematical model;Again, extract core numerical features from traditional criterion, and match with NI, TR and QFS thermal behavior to constitute data set;Again, data set is preprocessed, and is divided;Again, the recognition accuracy and generalization ability of different machine learning algorithms to reaction thermal behavior are analyzed and compared, and double-layer BP neural network is selected;Then determine the structure of double-layer BP neural network;Again, the weight and threshold of double-layer BP neural network are optimized using genetic algorithm and bayesian regularization algorithm;Again, confusion matrix is drawn to evaluate the classification performance of double-layer BP neural network;Finally, dimensionless mathematical model and optimized double-layer BP neural network are deployed, simulate and thermal behavior prediction for semi-batch reaction, effectively solve the problem that reaction system thermal behavior identification angle is not comprehensive, with stronger generalization ability and universality.

The invention relates to a dangerous chemical accident consequence prediction method and system. The prediction method comprises the following steps: constructing time sequence characteristic information of dangerous chemicals; optimizing different weight updating modes used in the training process of the long and short term memory network model through a regularization algorithm, and obtaining a fusion model trained by adopting different weight updating modes; and according to the prediction performance of each fusion model on the accident consequence of the dangerous chemicals, inputting the time sequence characteristic information into the fusion model meeting a preset condition, and generating the accident prediction consequence of the dangerous chemicals. According to the method, the consequences of accidents such as leakage, deflagration and fire disasters of the dangerous chemical storage tank can be quickly predicted more efficiently and accurately, and reliable technical support is provided for emergency site handling personnel.

The invention relates to the technical field of highway bridge safety monitoring, and discloses a bridge dynamic weighing algorithm based on a regularization algorithm. According to the method, a penalty term is added into an error function to obtain an axle load calculation formula with a regularization matrix, and the regularization matrix is determined by an axle load covariance matrix and a load response covariance matrix. The method specifically comprises the steps of obtaining influence line distribution through a calibration test; giving an initial regularization matrix to obtain an initial axle weight; calculating a load response covariance matrix based on the influence line distribution, the initial axle load and the measurement noise, and iterating a stable axle load covariance matrix in combination with a preset initial axle load covariance matrix; generating a regularization matrix according to the load response covariance matrix and the updated axle load covariance matrix, and calculating a new axle load; and repeating the iteration process until the axle load update difference value is smaller than a preset value, and finally outputting an axle load result. According to the invention, the axle load identification precision of the bridge dynamic weighing system is effectively improved.

The invention discloses an AI-based digital collection background music recommendation method, and relates to the technical field of AI. The method comprises the following steps: acquiring a key frame average image, a dominant tone vector and a style label of a digital collection, and candidate music samples and audio signals of a music library; extracting dynamic features of the digital collections to generate rhythm representation vectors; processing the music audio to generate a rhythm structure vector, and calculating the rhythm similarity between the rhythm structure vector and the rhythm structure vector through a dynamic time warping algorithm; generating a digital collection visual style vector and a music style vector, and calculating a style consistency score by using a cosine similarity algorithm; an auxiliary music feature vector is generated through the digital collection visual style vector, and a guide score is calculated in combination with the bottom layer audio features; and calculating a comprehensive score index according to the rhythm similarity, the style consistency score and the guide score. According to the invention, background music recommendation is carried out on the digital collections through the comprehensive scoring index.

The invention discloses an electrical impedance tomography method based on parameter optimization and boundary clustering, which combines penalty functions of two regularization algorithms Tikhonov and TV for application, proposes that a particle swarm algorithm is used for regularization parameter optimization of the combined penalty functions, and takes an image quality index (AL) as a fitness value of the particle swarm algorithm, so as to determine an optimal regularization parameter, and finally to obtain the electrical impedance tomography based on the parameter optimization and boundary clustering. The conductivity is obtained through a Newton iteration method, in order to further remove the artifacts, a boundary object B (artifacts) of the target is obtained through a Niblack algorithm, deep retrieval is conducted on the boundary object B of the target through a boundary clustering algorithm, all background pixels A are obtained, and the final conductivity distribution can be obtained. Simulation and actual measurement results show that the image reconstructed by the paper method can more accurately reflect the position information of the target object in the electric field, artifacts are effectively inhibited, and the reconstruction effect is improved.

The invention discloses a curative effect prediction method based on multi-organ metastasis genome data, and belongs to the technical field of medical models, and the method specifically comprises the following steps: collecting clinical pathological characteristics, multi-organ metastasis genome data and a treatment scheme of a breast cancer patient, and recording a metastasis part and a load state; dimensionality reduction is conducted on high-dimensional genome data through a regularization algorithm, feature importance is evaluated in combination with a nonlinear model, and clinical, treatment and genome features related to treatment response are screened out; inputting the screened features into a machine learning and deep learning framework, randomly dividing a training set and a test set in a layered manner, optimizing hyper-parameters through cross validation, and constructing a classic machine learning set model and a deep learning model based on an attention mechanism; disturbing test queue treatment scheme data, evaluating the consistency of model recommendation and an actual scheme, and verifying the prediction capability and clinical practicability of the model; according to the method, multi-dimensional data are integrated, and the curative effect prediction accuracy of the metastatic breast cancer is improved.

The invention is suitable for the technical field of smart cities, and provides a road inspection disease deduplication method, which comprises the following steps: collecting road disease data from different mobile inspection devices; performing space-time fusion processing on the road disease data through a preset space-time fusion model to obtain road disease fusion features; calculating an optimal transmission distance between the road disease fusion features through a preset entropy regularization algorithm, and generating a cost matrix; and based on the cost matrix, determining target road disease data, and performing de-duplication processing on the target road disease data. The method solves the problems that an existing disease duplicate removal method depends on static visual features of diseases, the essential similarity of the diseases under geometric deformation cannot be effectively captured, and the same disease is easily and repeatedly detected.

The application provides a power distribution room dynamic temperature control method and system based on heat tracing, a fine thermodynamic model of the power distribution room is constructed, and inverse problem solving is performed on multi-point temperature monitoring data based on a total variation regularization algorithm, so that accurate tracing and visual positioning of hidden and non-uniformly distributed heat sources are realized; on this basis, the system dynamically solves an optimal control strategy according to the heat source distribution obtained through real-time inversion, in combination with a preset cooling efficiency matrix, so as to drive each cooling device to perform directional, quantitative and collaborative precise cooling. The method and system effectively overcome the inherent defects of the traditional feedback regulation mode based on average temperature, such as difficulty in identifying local hot spots and mismatch of cooling resource allocation, achieve the technical effects of significantly improving temperature control accuracy and equipment operation reliability while greatly reducing the energy consumption of the cooling system, and provide an innovative solution for intelligent and efficient temperature management of closed electrical spaces such as power distribution rooms.

The application belongs to the technical field of industrial manufacturing, and provides a kind of martensitic stainless steel finishing thickness control optimization method, including data collection and arrangement, the data collected and arranged are cleaned and preprocessed, variables are screened using L1 regularization algorithm, a regression model is established and an optimization scheme is proposed by using the regression model combined with the process conditions in production;The application screens out the key variables affecting the thickness change through L1 regularization, and optimizes the parameter setting in the finishing process by using the regression model, which can significantly reduce the phenomenon of thin head and thick tail of the strip steel, thereby improving the thickness consistency and precision of the final product, avoiding the product scrap rate caused by non-standard thickness, thereby improving the production efficiency and reducing the production cost.

The application discloses a coseismic dislocation amount calculation method and system based on monocular monitoring video images, belongs to the technical field of earthquake emergency monitoring and space geodetic survey, and sequentially completes video acquisition preprocessing, feature point partition, camera vibration correction and relative displacement calculation, sub-pixel displacement optimization, pixel-physical displacement conversion, coseismic dislocation parameter solving and sliding track reconstruction and result verification output. Image sequences are extracted from monocular monitoring video streams, tracking and correction windows are selected after distortion correction and scale calibration, the influence of camera shaking is eliminated, sub-pixel level displacement measurement is realized by combining a regularization algorithm, a mapping model is established by recalibrating objects to complete displacement conversion and component decomposition, sliding parameters are solved, and a track curve is drawn. The coseismic dislocation amount measurement is low in cost, high in precision and real-time, can capture complex fault sliding dynamics, and supplements a traditional measurement method, thereby providing key data support for earthquake emergency.

The invention discloses an EIT image reconstruction quality evaluation-based dike termite nest identification method, and relates to the technical field of dike termite nest identification, and the method comprises the following steps: multi-channel EIT data collection, ant nest multi-physical field positive problem solving, image reconstruction based on a Tikhonov regularization algorithm, image reconstruction quality function calculation and image reconstruction quality evaluation. By designing a multi-channel EIT data acquisition scheme, full-coverage acquisition of electrical signals of the whole dike is realized, weak conductivity abnormal signals caused by ant caves are effectively reserved, comprehensive and pure original data support is provided for subsequent positive problem solving and image reconstruction, and the method has the advantages of being high in accuracy and high in reliability. The method ensures that signals of deep or tiny ant caves are not covered by noise, and solves the problems of limited data acquisition range, large noise interference and difficulty in capturing weak electrical characteristics of the ant caves in the dike in the existing detection technology.

The invention discloses a regularization algorithm and neural network cascaded spectrum reconstruction method and system. The method comprises the following steps: firstly, carrying out spectrum reconstruction on obtained light current data by adopting a regularization algorithm to obtain a pre-reconstructed spectrum; then the pre-reconstructed spectrum is equally divided into a plurality of sub-band spectrums according to a set interval range, and mutual interference between sub-bands is avoided; and inputting each sub-band spectrum into an adaptive neural network, and synchronously performing spectrum reconstruction on each sub-band spectrum through each neural network to obtain a sub-band reconstruction spectrum. And finally, splicing all the sub-band reconstructed spectrums into a final reconstructed spectrum according to a set fusion strategy. Therefore, the pre-reconstruction spectrum with a certain reference is used as the input of the neural network reconstruction spectrum to carry out refined spectrum reconstruction, so that the dependence of the neural network on a data set is greatly reduced, the spectrum reconstruction problem is simplified, the parameter scale of the neural network is reduced, the calculation cost and the storage space occupation are reduced, and the reconstruction rate is also improved.

The application discloses a meteorological radar wind field inversion method, device, equipment and storage medium, and relates to the technical field of meteorological radars. The method comprises the following steps: acquiring observation data to be processed; the observation data comprises a plurality of first direction angles on a specified distance and a first radial velocity corresponding to each first direction angle; determining whether the plurality of first radial velocities are free from velocity ambiguity by using a preset velocity ambiguity discrimination rule; in response to the plurality of first radial velocities being free from velocity ambiguity, extracting a preset number of second direction angles and a second radial velocity corresponding to each direction angle from the observation data; and obtaining a wind field inversion result by using a regularization algorithm and a wind field observation relationship model based on the plurality of second direction angles and the second radial velocity.

The present application relates to the technical field of audio processing, solves the problems of low recognition accuracy and high delay of double wake-up word in the prior art, and provides a wake-up word recognition method, device, equipment and medium based on double-word joint detection. The method comprises: obtaining key feature information extracted from a to-be-detected audio segment in multiple care scenarios; obtaining feature template information corresponding to a target object; performing feature matching on the key feature information and the feature template information, if the matching fails, dividing the audio frame into multiple audio paragraphs; adjusting the step length of the algorithm detection in each audio paragraph according to the amplitude difference value; according to the target step length corresponding to each audio paragraph, using a time regularization algorithm to respectively perform similarity matching on each target audio paragraph, and outputting a first target audio paragraph and a second target audio paragraph; using a double-word joint detection algorithm to recognize the target wake-up word. The present application improves the accuracy and reliability of double wake-up words.

The invention relates to the technical field of semiconductor device photoelectric performance testing, and discloses a high-sensitivity heterojunction spectrum detection system and a data acquisition method thereof, and the system comprises a bias voltage control unit, a signal acquisition unit, a digital processing unit and an upper computer processing unit. The digital processing unit adopts a trapezoidal hysteresis scanning strategy, and utilizes a transient shielding window and asymmetric residence time to induce charge hysteresis; and performing synchronous demodulation on the current response through a parallel channel, extracting differential conductance, differential capacitance and second harmonic components, and correcting a system phase error by using a rotation matrix. The upper computer processing unit constructs an augmented matrix based on multi-dimensional physical parameters, combines a physical kernel function, and utilizes a mixed regularization algorithm with smooth and sparse constraints to invert and calculate an interface state density distribution spectrum. According to the method, the problems of large signal scanning interference and inversion ill-conditioned conditions in general detection are solved, and high-precision quantitative characterization of interface state defects is realized.

The present application belongs to the field of seismic exploration technology, and relates to a strong interference seismic data source function inversion method based on lateral local regularization, which applies lateral local regularization constraint in the source function waveform inversion process to ensure the lateral continuity and accuracy of the inversion result; utilizes near trace short time data to reduce the nonlinearity of the inversion and the dependence on the velocity model, and ensures the overall calculation efficiency of the algorithm; performs source function inversion under the full waveform inversion framework, and the inversion result has the advantages of high accuracy and high resolution in theory; combines the advantages of the cross-correlation target function and the lateral local regularization algorithm, can obtain high-quality source function inversion result under strong interference, utilizes the mutual constraint between adjacent source functions to enhance the lateral continuity of the inversion result, and to a large extent overcomes the initial source dependence problem. The method can stably obtain high-precision and good lateral consistency source function inversion result under the condition of strong interference of seismic data.

The invention provides a power transmission line icing weight estimation method based on image splicing and sag inversion. An icing image of a power transmission line is shot through an unmanned aerial vehicle; an improved total variation regularization algorithm is adopted to carry out enhancement processing on the blurred image, and the detail definition is improved; feature points are extracted by using an SIFT algorithm and dynamic matching is carried out, and image splicing is realized by combining a weighted fusion algorithm; extracting the contour of the power transmission line based on the spliced image and calculating the maximum sag; a dynamic relation model of the icing weight and the sag is established by combining a parabola model and temperature and wind load factors, the icing weight is inversed, and compared with the prior art, through a combined strategy of total variation regularization and SIFT dynamic matching, the feature point matching accuracy under a complex environment reaches 95.8%, the sag measurement error is only 1.337%, and the accuracy of the feature point matching is greatly improved. The precision and robustness of icing weight estimation are remarkably improved, and reliable technical support is provided for power transmission line anti-icing disaster reduction.

A power system scenario reduction method and system, electronic equipment and storage medium, the method comprises the following steps: using an initial scenario set, establishing a scenario reduction problem model, and using an information entropy regularization algorithm to convex the scenario reduction problem model to obtain a regularized scenario reduction problem model; input the initial scenario set, the typical scenario set and the regularization coefficient, construct the scenario reduction network model, combine the regularized scenario reduction problem model and the scenario reduction network model, and calculate the regularized transmission matrix and the distance matrix; using the regularization coefficient, the regularized transmission matrix and the distance matrix, the loss function of the Sinkhorn distance considering the transportation cost and the entropy regularization penalty is solved; based on the loss function, the typical scenario set is trained in reverse gradient by using the scenario reduction network model, and the trained typical scenario set and the edge probability distribution of the typical scenario set are obtained. The present application can improve the feasibility of large-scale scenario reduction and the stability of solution.

The invention discloses a user side load prediction method and system based on a virtual power plant, and belongs to the technical field of power systems, and the method comprises the following steps: S1, collecting real-time data of a user side intelligent electric meter, a photovoltaic inverter and an energy storage system, aligning equipment clock skew through a dynamic time warping algorithm, and generating a time-space synchronous input data set; s2, data in the input data set in the S1 is input into a parameterized quantum circuit for feature compression coding, the quantum circuit comprises eight superconducting quantum bits, and 32-dimensional data is mapped into 8-dimensional quantum feature vectors through a trainable revolving door and entanglement door sequence. According to the scheme, through fusion of quantum calculation and a classical algorithm, the load prediction precision and the response speed are remarkably improved, and particularly, high reliability can still be kept in complex scenes such as extreme weather.

The application discloses a kind of based on AI's digital collectible background music recommendation method, and the application relates to AI technical field.The steps of the method include: obtaining the key frame average image of digital collectible, main color tone vector, style label, and candidate music sample, audio signal of music library;Extract digital collectible dynamic feature to generate rhythm representation vector;Music audio processing generates rhythm structure vector, and the rhythm similarity of both is calculated by dynamic time regularization algorithm;Digital collectible visual style vector and music style vector are generated, and the style consistency score is calculated using cosine similarity algorithm;Auxiliary music feature vector is generated from digital collectible visual style vector, and guide score is calculated by combining underlying audio features;According to rhythm similarity, style consistency score, guide score Comprehensive score index is calculated.The application recommends background music for digital collectible by the comprehensive score index.

The invention discloses an improved regularized radial gate support arm pulsating load time domain identification method, and belongs to the technical field of radial gate flood discharge vibration monitoring. Comprising the steps of collecting a vibration signal and performing noise reduction; constructing a three-dimensional finite element mathematical model of the radial gate support arm and calculating a unit impulse response function matrix; displacement response of the radial gate support arm under discharge excitation is obtained through Duhamel integration, and an inverse analysis mathematical model is constructed; solving is carried out through a Tikhonov regularization algorithm, regularization parameters are obtained through an ICAA regularization selection method, and the inverse analysis mathematical model is corrected; the vibration displacement response obtained after noise reduction serves as input, iterative solution is conducted on the corrected inverse analysis mathematical model, and the water flow pulsation load is obtained. According to the method, the difficulty that the pulsating load cannot be directly measured or the pulsating load S cannot be solved according to the dynamic response variable in the prior art is solved, the selection accuracy of the regularization parameters is improved, the interference of noise is weakened to a certain extent, and the load identification precision is improved.

This invention relates to the field of highway bridge safety monitoring technology and discloses a bridge dynamic weighing algorithm based on a regularization algorithm. The invention obtains an axle load calculation formula with a regularization matrix by adding a penalty term to the error function. The regularization matrix is ​​determined by the axle load covariance matrix and the load response covariance matrix. Specifically, the process involves: obtaining the influence line distribution through calibration tests; obtaining the initial axle load given an initial regularization matrix; calculating the load response covariance matrix based on the influence line distribution, the initial axle load, and measurement noise, and iterating a stable axle load covariance matrix by combining it with the preset initial axle load covariance matrix; generating a regularization matrix based on the load response covariance matrix and the updated axle load covariance matrix, and calculating a new axle load; repeating the above iterative process until the axle load update difference is less than a preset value, and finally outputting the axle load result. This invention effectively improves the axle load identification accuracy of the bridge dynamic weighing system.

The invention discloses a meteorological radar wind field inversion method, device and equipment and a storage medium, and relates to the technical field of meteorological radars. The method comprises the following steps: acquiring observation data to be processed; the observation data comprises a plurality of first direction angles in a specified distance and a first radial speed corresponding to each first direction angle; determining whether the plurality of first radial velocities do not have velocity ambiguity by using a preset velocity ambiguity discrimination rule; in response to the fact that the multiple first radial speeds do not have speed ambiguity, a preset number of second direction angles and second radial speeds corresponding to the direction angles are extracted from the observation data; and obtaining a wind field inversion result by using a regularization algorithm and the wind field observation relation model based on the plurality of second direction angles and the second radial speed.

The present application belongs to the technical field of deepwater exploration of ocean oil and gas, and provides a method for determining a model of viscous friction of a riser after separation and drilling leakage, which is fused with mechanism and data, the method comprising: step S1: obtaining original data, including the pressure difference between the top and bottom of the riser, the liquid column height, the cross-sectional area of the inner wall of the pipe, the flow rate of the liquid in the pipe, and the viscous friction of the leakage liquid of the inner wall of the pipe; step S2: analyzing the data characteristics, analyzing and screening the Top-N key features; step S3: processing and classifying the data, using the Min-Max scaling normalization method to perform data feature standardization operation; step S4: determining and optimizing the data-driven model structure, selecting a randomly configured neural network as the core tool; step S5: training the model, alternately executing the network node growth and Dropout regularization algorithm; step S6: testing the model, verifying whether the Top-N key features on the test data are consistent.

The invention relates to a mirror image type acoustic tomography step-by-step three-dimensional field inversion method based on an empirical orthogonal function. The method comprises the following steps: collecting marine environment data; performing modal extraction and dimension reduction characterization, and establishing a field characterization system; constructing an acoustic propagation forward modeling model; constructing a core observed quantity, carrying out joint inversion, and carrying out robust solution by adopting a regularization algorithm to obtain a time coefficient of a section vertical structure; parameterizing a three-dimensional sound velocity field inversion problem, and assimilating discrete section sound velocity inversion into globally optimal field estimation; parameterizing a three-dimensional flow velocity field inversion problem, and assimilating discrete section flow velocity inversion into global optimal field estimation; solving and reconstructing a three-dimensional sound velocity field inversion problem, estimating a global coefficient for describing a sound velocity abnormal field, and finally generating a quantitative ocean sound velocity field product; and solving and reconstructing a three-dimensional flow velocity field inversion problem, estimating a global coefficient for describing an east component and north component abnormal field, and finally reconstructing a three-dimensional flow velocity field.