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66 results about "Nonlinear evolution" patented technology

Geological disaster monitoring system based on multi-modal data

The invention discloses a geological disaster monitoring system based on multi-modal data, and relates to the technical field of geological disaster monitoring, and the system comprises a crack analysis module which carries out the time-space correlation mining of the crack propagation rate of a monitoring region, and analyzes the nonlinear evolution characteristics and spatial differentiation rules of rock mass fracture; and the critical identification module is used for performing wavelet packet energy spectrum analysis on the inclination angle change rate of the geologic body, identifying a critical turning point of rigidity attenuation of the geologic structure in combination with a preset algorithm, judging whether the overall stability enters an instability acceleration stage or not, and performing multi-parameter collaborative detection, crack evolution cross validation and dynamic trend stability verification to obtain the stability of the geologic structure. The accuracy and reliability of geological structure rigidity attenuation critical turning point recognition are remarkably improved, a more accurate rigidity attenuation stage judgment basis is provided for an early warning module, and the capturing capacity of a multi-modal data geological disaster monitoring system for structure instability precursor is enhanced.
Owner:江苏省地质局第一地质大队

Storm surge water increase prediction method and device, electronic equipment and storage medium

The invention discloses a storm surge water increase prediction method and device, electronic equipment and a storage medium, and relates to the technical field of seawater monitoring, and the method comprises the steps: obtaining multi-source observation data of a target sea area, the multi-source observation data comprising satellite remote sensing data, near-shore monitoring data, meteorological mode data and drainage basin data; performing space-time alignment and exception processing on the multi-source observation data to generate standardized space-time grid data; performing hybrid prediction modeling on the standardized space-time grid data through a physical data dual-drive modeling layer to obtain a target probability water increasing field; and dynamically correcting the target probability water increasing field by using real-time observation data to obtain a storm surge water increasing predicted value. A physical mechanism model and a probability generation model are combined, limitation of a single model is overcome, and the nonlinear evolution process of the storm surge is effectively captured; the time-space dual-drive architecture is adapted to complex coast terrains and changeable meteorological conditions, and the risk of missing report or false report is reduced.
Owner:SUN YAT SEN UNIV

Environmental data processing method and system based on ocean engineering

PendingCN121808260AInference methodsNeural learning methodsData streamPropagation of uncertainty
The invention discloses an environmental data processing method and system based on ocean engineering, and relates to the technical field of data processing, and the method comprises the steps: receiving an original observation data flow through a multi-source data preprocessing module, and carrying out the dynamic noise filtering and abnormal value adaptive detection; fusing the multi-source heterogeneous data through a multi-scale data fusion module, and embedding the fused multi-source heterogeneous data into a marine kinetic equation as a soft constraint; non-linear evolution features are extracted from the fusion data through a feature extraction and state representation module, and a high-dimensional environment state vector is constructed; real-time prediction of model parameters is executed through online learning and an inference engine; and performing uncertainty propagation calculation on the processing flow through a confidence evaluation module and generating a final environment state report. According to the method, the adaptive capacity of data preprocessing can be remarkably improved, the physical consistency of multi-source data fusion is improved, the nonlinear evolution law of ocean phenomena is accurately captured, and continuous online optimization and edge side low-delay response of model parameters are achieved.
Owner:恒盛鑫源(天津)工程技术有限公司

Intelligent charging and discharging strategy optimization method for ship battery

The invention discloses an intelligent charging and discharging strategy optimization method for a ship battery, and particularly relates to the technical field of battery management. Propulsion power data, auxiliary equipment power data and environment disturbance parameters generated in the ship operation process are collected, a high-frequency time sequence working condition input sequence is built, a load nonlinear evolution model is built through a multi-scale dynamic modeling algorithm, and a disturbance perception prediction sequence is generated; a heterogeneous state characteristic matrix is constructed by combining historical charging and discharging state records of a target battery and current sensing data, voltage sensing data and temperature sensing data, and then the state of charge and the state of health of the battery are evaluated; generating a multi-dimensional strategy candidate set by constructing an energy scheduling constraint map according to the evaluation results of the state of charge and the state of health of the battery; and selecting an optimal strategy path from the multi-dimensional strategy candidate set, outputting a target charging and discharging control instruction, and realizing comprehensive optimization control of dynamic sensing, state driving and strategy self-adaption of the ship battery.
Owner:GUANGZDONG YUEXIN OCEAN ENG +1

Distributed photovoltaic ultra-short-term prediction method and system based on satellite cloud picture information

The invention relates to a distributed photovoltaic ultra-short-term prediction method and system based on satellite cloud picture information, and belongs to the technical field of photovoltaic power prediction. Firstly, the correlation degree of meteorological variables and distributed photovoltaic power is measured through a Pearson correlation coefficient, and cloud layer distribution and movement characteristics thereof are analyzed and found to be key factors influencing photovoltaic output precision, so that a cloud cluster movement prediction framework under multiple time scales is constructed: a CNN-LSTM hybrid model is adopted to capture a nonlinear evolution rule of a cloud cluster; secondly, a feature cloud region dynamic selection algorithm is innovatively designed by means of a satellite cloud picture data source, an ultra-short-term distributed photovoltaic power prediction model based on the convolutional neural network is constructed by accurately quantifying a cloud layer shielding effect and combining the convolutional neural network, and the prediction precision is remarkably improved by effectively fusing cloud motion features.
Owner:DEZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1

Multivariate data acquisition and fusion analysis method and system for structural health monitoring

The invention provides a multivariate data acquisition and fusion analysis method and system for structural health monitoring. The method comprises the following steps: acquiring target building or structure monitoring data by using an integrated multivariate sensor and transmitting the target building or structure monitoring data; processing the monitoring data; establishing an LSTM neural network modal parameter prediction model and an LSTM neural network correction dip angle prediction model, and performing training; and determining a modal parameter sequence and a corrected inclination angle sequence for prediction, respectively inputting the modal parameter prediction model and the corrected inclination angle prediction model of the LSTM neural network to obtain a modal parameter prediction sequence and an inclination angle prediction sequence, and carrying out trend analysis and early warning. According to the method, the influence of environmental parameters on the parameters of the measured structure and the prediction result is effectively eliminated, the measured data of buildings or structures under different conditions are trained and fitted by using the LSTM neural network, and the nonlinear evolution characteristics of the time series data of the measured structure can be expressed with high precision.
Owner:SHANGHAI JIAOTONG UNIV +1

Roadway surrounding rock deformation intelligent monitoring method and device based on three-dimensional laser scanning

The invention relates to the field of roadway surrounding rock deformation analysis, in particular to a roadway surrounding rock deformation intelligent monitoring method and device based on three-dimensional laser scanning. The method comprises the following steps: performing three-dimensional laser scanning on a roadway to generate equalized laser point cloud data; performing point cloud relative deformation detection and surrounding rock deformation dynamic modeling on the equalized laser point cloud data to construct a dynamic surrounding rock deformation model; performing space grid division on the dynamic surrounding rock deformation model, and performing differential change trend analysis to generate a multi-unit deformation trend; performing nonlinear evolution analysis and deformation situation prediction in a future time period on the multi-unit deformation trend to generate a deformation prediction result; and performing deformation situation interference simulation on the deformation prediction result, and extracting various interference simulation results. According to the invention, surrounding rock deformation data is accurately obtained in real time, and the deformation trend is dynamically analyzed and predicted, so that early warning is performed in advance, the safety risk is effectively reduced, and the safety and monitoring efficiency of underground engineering are improved.
Owner:HENAN POLYTECHNIC UNIV +1

Small Reynolds number liquid film flow simulation method

The invention discloses a small Reynolds number liquid film flow simulation method, which comprises the following steps of: deducing normal stress, shear stress balance conditions and motion boundary conditions on the surface of a liquid film under the action of gravity, airflow shear force and evaporation effect according to a flow physical model; non-dimensionalization and simplification are carried out on the non-slip boundary condition of the wall surface, the mass equation and momentum equation of the flow and the boundary condition of the surface of the liquid film; for small Reynolds number flow, derivation is carried out based on a long wave theory method, and a differential equation of liquid film thickness evolving along with time and space under the synergistic influence of gravity, airflow shear force and evaporation effect is obtained; carrying out weak nonlinear evolution analysis of fluctuation on the differential equation to obtain a change relation of the instability growth rate of the fluctuation along with gravity, airflow shear force and evaporation effect, and giving a change image of the influence of the airflow shear force and the evaporation effect on the instability growth rate of the liquid film fluctuation.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Radar rainfall real-time estimation system based on double-method fusion and ground verification

The invention provides a radar rainfall real-time estimation system based on double-method fusion and ground verification, belongs to the technical field of meteorological radar rainfall estimation, and adopts double-method fusion of a physical model estimation module and a driving model estimation module to cooperate with a causal inference fusion engine to improve the precision and adaptability of rainfall estimation and improve the rainfall estimation accuracy. The physical model module adaptively selects a Z-R, ZDR-R or KDP-R relation according to the quality of radar-based data and rainfall scenes, drives the model module to capture space-time nonlinear evolution characteristics of rainfall echoes and predicts short-time rainfall dynamics, and the causal inference engine identifies differentiated characteristics of two estimation fields, inferes hail, vertical airflow and other physical hybrid factors, and performs real-time prediction on the hail, the vertical airflow and other physical hybrid factors. A comprehensive rainfall estimation field is generated, a continuous error correction field converted from ground station observation data is corrected through a space-time error atlas network, and finally rainfall estimation information is generated for real-time rainfall estimation, so that the adaptability to a complex weather field and the precision of the estimation field are improved.
Owner:NINGXIA HUI AUTONOMOUS REGION ATMOSPHERIC DETECTION TECH GUARANTEE CENT

Mobile monitoring and early warning method and system for micro-fracture of coal mine roof

The invention relates to a coal mine roof micro-fracture mobile monitoring and early warning method and system, and belongs to the technical field of coal mine safety monitoring. Denoising the vibration signal to obtain a denoised vibration signal; calculating the position of a fracture source according to the denoised vibration signal; clustering all fracture source positions to obtain clustered fracture sources; feature indexes are extracted from the clustered fracture sources; combining all the feature indexes to obtain a feature vector, and training an LSTM model by using the feature vector to obtain a roof instability probability prediction model; and monitoring the target coal mine roof by using the roof instability probability prediction model. According to the method, by introducing the LSTM deep learning model, a complex nonlinear evolution rule can be learned from high-dimensional time series data, the quantitative instability probability is output, upgrading from threshold alarm to intelligent prediction is achieved, and the false alarm rate and the missing report rate are remarkably reduced.
Owner:SHENZHEN POLYTECHNIC

Flow sound mode decomposition method coupling local projection and Helmholtz decomposition

The invention discloses a streaming sound mode decomposition method coupling local projection and Helmholtz decomposition, and relates to the streaming sound mode decomposition field, and the method comprises the steps: employing a local projection method to obtain turbulence coherent structure velocity field time series data and turbulence disordered structure velocity field time series data; respectively carrying out Helmholtz decomposition on the two to obtain a first decomposition result and a second decomposition result; performing divergence on the two decomposition results to obtain a first Poisson equation and a second Poisson equation respectively; carrying out numerical solution on the two Poisson equations to respectively obtain a first scalar potential and a second scalar potential; taking gradients from the two scalar potentials to respectively obtain a turbulent coherent structure acoustic mode velocity field and a turbulent disordered structure acoustic mode velocity field; obtaining a turbulence coherent structure dynamic modal velocity field based on the turbulence coherent structure acoustic modal velocity field; obtaining a turbulence disorder structure dynamic modal velocity field based on the turbulence disorder structure acoustic modal velocity field; according to the method, the flow sound mode decomposition of the nonlinear evolution flow velocity field can be realized.
Owner:CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT

Method, system and equipment for improving quality of high-frequency acquired data of transformer area and medium

PendingCN122045617APathPingAlgorithm
The invention discloses a transformer area high-frequency acquisition data quality improvement method, system and device and a medium, and the method comprises the steps: constructing a multi-level rule field, converting a rule into a continuous potential energy function with directivity and range control, and forming a regular force field in a semantic space; defining a field state function, and generating a plurality of field completion candidate values through rule-driven nonlinear evolution reasoning; a candidate value path diagram is constructed, nodes of the path diagram represent candidate values, and edge weights are determined according to semantic and rule association features among the candidate values; calculating the global path participation degree of each node based on the path diagram, and selecting an optimal complement value according to the global path participation degree; and executing multi-dimensional consistency verification and high-confidence judgment, and marking and supplementing the credibility level according to a verification result, thereby realizing closed-loop improvement of data quality. According to the method, the accuracy, the logic consistency and the high confidence of missing field supplementation of the high-frequency acquisition data of the transformer area in a complex interference environment are remarkably improved.
Owner:HAINAN POWER GRID CO LTD

Egg surface microcrack detection method and system based on machine vision

The invention belongs to the technical field of image processing, and relates to an egg surface microcrack detection method and system based on machine vision. The method comprises the following steps: acquiring a transmission image of an egg, performing spatial calibration, determining a geometric center and a long axis scale of an egg region, and establishing a polar coordinate mapping relation of each pixel point; according to the linear distance from each pixel point to the geometric center and the included angle relative to the long axis direction, the geometric sensitivity weight of each pixel point is evaluated, and the optical path distortion degree of the edge high-curvature area is represented; extracting contrast basic energy of the pixel points by using a local space window, and carrying out nonlinear evolution on a local gray gradient by combining with a geometric sensitivity weight to obtain an adaptive contrast energy evolution result; and coupling the local background variance and the geometric sensitivity weight, and calculating the crack identification confidence of each pixel point so as to carry out identification decision of the egg surface microcracks. According to the invention, extremely fine crack signals can be captured, and accurate detection of the microcracks on the surface of the egg is realized.
Owner:DONGMING JIAN AGRI & ANIMAL HUSBANDRY CO LTD

Optical fiber link physical parameter estimation method based on multichannel feature input neural operator

The invention discloses an optical fiber link physical parameter estimation method based on a multichannel feature input neural operator, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring signals of a transmitting end and a receiving end under different channel parameters, and respectively calculating multiple groups of weighting and observation data corresponding to loss, dispersion and nonlinear effect according to a nonlinear evolution equation for describing optical signal transmission; splicing the observation data and processing the observation data into a high-dimensional complex feature sequence; a frequency domain operator block comprising a parallel complex frequency spectrum and a time domain convolution branch is designed to extract and fuse the features, and aggregation representation of the channel features is obtained through Fourier transform and frequency domain attention pooling; and outputting estimated dispersion and nonlinear real number parameters through a plurality of multi-layer perceptron and a linear projection layer. According to the method, physical priori knowledge of optical fiber transmission is integrated into the deep neural operator, so that the parameter estimation capability and the model generalization performance of long-distance, strong-dispersion and strong-nonlinearity optical fiber links are improved.
Owner:SOUTHWEST JIAOTONG UNIV

Interventional extraction of solute transport from ionic ore bodies

PendingCN122631712ADynamic impedanceStream flow
The present application relates to the field of underground fluid intelligent control, and discloses a method for intervention and extraction of ion type ore body solute migration, comprising: establishing a feedback monitoring network for a fluid injection distribution system, obtaining pressure parameters and flow parameters generated by interaction between a controlled branch and a controlled medium; calculating dynamic impedance parameters of internal seepage resistance state of the controlled medium; extracting a follow-up change rate of the dynamic impedance parameters, identifying nonlinear evolution of pore structure induced by flow resistance mutation; comparing the follow-up change rate with a preset threshold value to determine bypass overflow risk; generating a flow dynamic distribution instruction and adjusting valve opening to make the local flow field stable within a preset flow resistance gradient range, wherein the present application solves the problem of sensing loss induced by formation porosity evolution through a dynamic flow resistance feedback intervention mechanism, drives fluid to penetrate into unconsolidated blind areas, and constructs a continuous and dense seepage interception interface.
Owner:CHINA RARE (FUJIAN) RARE EARTH MINING CO LTD CHANGTING BRANCH

Calculation method of electrical conductivity of supercritical fluid system considering quartz dissolution effect

This invention discloses a method for calculating the conductivity of a supercritical fluid system taking into account the quartz dissolution effect, belonging to the technical field of calculating the conductivity of solutions in supercritical fluid systems. This invention establishes a fluid conductivity model in a ternary system under the conditions of a temperature of 500-800°C, a pressure of 6-12 kbar, and a NaCl concentration of 0.01-0.4X NaCl. By introducing a quartz solubility correlation equation and combining it with an ion activity coefficient model, this method quantifies the nonlinear evolution of supercritical fluid conductivity at a microscopic level, thus addressing the problems existing in the prior art.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Hyperparallel microwave photon Isin machine system based on wavelength division multiplexing and optimization method

The invention discloses an ultra-parallel microwave photon Isin machine system based on wavelength division multiplexing and an optimization method, and belongs to the technical field of photon calculation and combination optimization. The Isin machine system comprises a multi-wavelength light source module, a microwave modulation and wavelength division multiplexing coding module, a nonlinear calculation and evolution module and a demultiplexing and dynamic feedback module, all the modules are optically and electrically connected to form a closed-loop system, and different optimization problems can be coded to independent wavelength channels to achieve parallel solving. The optimization method is applied to the Isin machine system, and closed-loop optimization is completed through the steps of coupling matrix mapping, microwave modulation loading, nonlinear evolution, dynamic feedback control and the like. The method supports synchronous processing of 1024 optimization problems, and energy consumption of a single problem is lt; the method is mainly applied to the fields of logistics scheduling, financial modeling, communication network optimization and the like, and an efficient physical calculation solution is provided for a large-scale combination optimization problem.
Owner:BEIJING YIXIN INTELLIGENT TECHNOLOGY CO LTD

High frequency probe card signal optimization method based on dynamic impedance matching and related apparatus

The present application relates to the technical field of probe card signal optimization, in particular to a high-frequency probe card signal optimization method based on dynamic impedance matching and related devices. The method steps include: obtaining real-time high-frequency signal reflection parameters of the probe card test channel to provide real-time detection basis for dynamic impedance matching. The present application relies on the real-time acquisition of the high-frequency signal reflection parameters of the probe card test channel to complete the quantitative tracing of the dynamic impedance deviation, and through the closed-loop feedback adjustment, the integrated adjustable impedance network of the driving probe is used to complete the real-time correction of the output impedance. From the root level of transmission line impedance matching, the present application breaks through the inherent limitation of the traditional static matching scheme which can only adapt to the nominal working condition, and can effectively offset the dynamic impedance mismatch introduced by the contact state difference, the probe structure micro-deformation, the device individual parasitic parameter dispersion and the nonlinear evolution of the parasitic parameters under high frequency in the actual test process, and solves the reflection residual problem that cannot be eliminated by static matching.
Owner:SHENZHEN KEDAXIN TECH CO LTD

A tool health state online monitoring method and system based on workpiece machining quality data fusion

ActiveCN121705804BGroove widthFeature vector
This invention discloses an online tool health monitoring method and system based on workpiece machining quality data fusion. First, the deviation between the actual groove width and the standard groove width of the workpiece is calculated, constructing a time-series sequence of groove width deviation. Then, a sliding time window mechanism is used to dynamically extract multi-dimensional time-series features, including mean, standard deviation, slope, out-of-tolerance count, and previous values, comprehensively characterizing the nonlinear evolution trend during tool wear. Further, the fused feature vector can be input into a random forest regression model to achieve high-precision prediction of the current groove width. Finally, based on the deviation between the predicted groove width and the standard groove width, the tool degradation state is evaluated in real time. This invention directly utilizes groove width data from the machining process, eliminating the need for additional sensor deployment. It offers advantages such as low cost, high reliability, and strong real-time performance, reducing scrap rate and improving tool life without increasing hardware investment.
Owner:TIANJIN UNIV

Optical information processing system and training method and apparatus

The present disclosure provides an optical information processing system and a training method and device, and relates to the fields of optical computing, artificial intelligence and optoelectronic hybrid computing. The system can include an encoder, a mode selection transmission module and a decoder; the encoder is configured to modulate an input light field to generate a continuous complex light field; the mode selection transmission module is configured to perform discrete mapping of the continuous complex light field in a low-dimensional latent space, and obtain an output light field through nonlinear evolution; and the decoder is configured to generate a task processing result corresponding to the input light field according to the output light field. The scheme disclosed in the present disclosure can improve the nonlinear representation capability of the system.
Owner:SHPHOTONICS LTD

Construction of nonlinear response model of soil moisture and implementation system of precise water distribution

The present application relates to the technical field of general control system of nonlinear feedback and precision process control, disclose a kind of construction and accurate water distribution execution system of soil moisture nonlinear response model, including characteristic perception module, infiltration damping observation module, pulse width modulation module and actuator module, module calculates the derivative term of porous medium controlled object characteristic parameter, extracts the instantaneous slope of trajectory vector in infiltration dynamic phase plane, and utilizes determination logic to trigger duty cycle constraint when second derivative term is negative and instantaneous slope absolute value exceeds threshold, and the medium flow rate is adjusted by actuator, the present application utilizes trajectory curvature feature to characterize the nonlinear evolution of internal damping of controlled object, realizes the pre-judgment to infiltration stall point, eliminates the physical phase lag of control loop, suppresses the adjustment overshoot, and ensures the operation of system under complex damping working condition.
Owner:LUOYANG YINGSHANHONG TRACTOR

Vertical deformation coordination control and pre-offset construction method of super-high special-shaped steel concrete bridge tower

ActiveCN122174342BTowerIterative method
The application discloses a kind of vertical deformation coordination control and pre-offset construction method and system of super-high special-shaped steel bridge tower, method includes: according to the time-varying deformation difference of steel and concrete, construct vertical difference deformation analysis model, calculate the vertical deformation difference of bridge tower full cycle, provide basis for pre-offset calculation;Combined with deformation difference, establish the pre-offset calculation system with the minimum deformation difference as the goal, and the improved nonlinear iterative calculation method is used to determine the construction reverse pre-offset amount in reverse direction.The iterative method takes the minimum sum of deformation difference as the goal, combines time effect and deformation data, adjusts step length and updates pre-offset amount to meet convergence requirements, while dividing stages according to construction nodes, establishing adaptive fitting function to ensure connection, reflecting nonlinear evolution of deformation.Pre-offset amount is segmented and constructed synchronously, and the posture is calibrated, linear is monitored in real time, and the difference deformation is offset by pre-offset deformation.
Owner:POLY CHANGDA ENGINEERING CO LTD +3

Beam damage identification method based on Koopman auto-encoder neural network

The invention discloses a beam damage identification method based on a Koopman auto-encoder neural network, and the method comprises the steps: collecting the dynamic response data of a structure under the impact load effect based on the finite element simulation analysis of a cantilever beam; then, the collected data is preprocessed, and a data set used for training a Koopman auto-encoder neural network is constructed; training a Koopman auto-encoder neural network by using the data set so as to learn a nonlinear evolution law of the beam structure power system and obtain a linear lifting form of the beam structure power system; and based on the trained network, calculating Koopman modals of a health state and a to-be-detected state, and constructing a damage index by comparing the difference between the health state and the to-be-detected state, thereby realizing accurate identification and positioning of the beam structure damage. According to the method, the characteristic that a nonlinear system is globally linearized according to the Koopman theory is utilized, the defect that a traditional method is sensitive to structural nonlinearity and environmental noise is overcome, and the method has the advantages of being high in recognition precision, high in anti-noise capacity and the like and is suitable for beam structure health monitoring under complex working conditions.
Owner:HOHAI UNIV

PM2.5 data calibration method and system for pollution peak value

The invention relates to the technical field of data processing, in particular to a PM2.5 data calibration method and system for a pollution peak value. According to the method, the logic of the dynamic interval is constructed based on model operation fine particulate matter fluctuation characteristics, so that a nonlinear evolution rule can be captured and static threshold limitation can be eliminated, and core geometric constraint conditions are effectively fused in a mode of constructing a planar topology network for suspected peak values and measuring and calculating spatial diffusion gradient values; a directional flux value is derived based on a triangular interior angle sine constant, a dispersion scalar is generated to participate in a mechanism of reference comparison, pure concentration comparison is converted into a conveying strength quantitative evaluation process with meteorological physical support, and a real extreme value pushed by meteorological external causes and false burrs caused by equipment faults are accurately distinguished. And replacement and retention operations are executed in a targeted manner according to the discrimination result, the technical barrier that the authenticity of the peak value is easily confused by the conventional means is overcome, and the physical real attribute and traceability analysis precision of the data calibration sequence are practically guaranteed.
Owner:CHENGDU UNIV OF INFORMATION TECH

Intelligent sensing system for hoisting risk of large equipment

The invention discloses a large equipment hoisting risk intelligent sensing system, and belongs to the technical field of hoisting risk identification. The method is used for solving the technical problem that an overload or out-of-control risk cannot be early warned in time due to the fact that online state monitoring of key devices such as a torque limiter and an anti-falling safety device is not integrated in an existing scheme. Through fusion of a fiber bragg grating, a millimeter wave radar and a torque sensor, full-scale monitoring from material damage to overall dynamic behaviors is achieved, an improved Transform model is combined with a space-time self-attention mechanism, dynamic updating of the eccentric distance is implemented based on torque-strain combined calculation, and the real-time control requirement of hoisting operation is met; according to the method, a three-dimensional risk tensor fusing structure defect-load offset-environment interference is constructed, the three-dimensional risk tensor is converted into a Lorenz system initial condition through state mapping, a future trajectory is predicted through a pre-training model, and end-to-end modeling of dynamic risk and nonlinear evolution is realized.
Owner:JIANGYIN YIYUAN EQUIP ISTALLATION CO LTD

Method and system for optimizing size of spanning frame structure based on firefly algorithm

The invention discloses a spanning frame structure size optimization method and system based on a firefly algorithm, and relates to the technical field of electric power engineering construction, and the method comprises the steps: firstly building a parameterized finite element model, implementing normalized hierarchical loading, obtaining a tangent stiffness matrix evolved along with a load, calculating the modal participation degree of a component, and constructing a dynamic participation degree track; and according to the quantitative trajectory smoothing index, the modal dominance and the key component suppression index, constructing a brightness function with coupled rigidity and trajectory features. The firefly attraction degree is corrected by means of trajectory similarity based on modal energy fingerprints, and nonlinear search is executed through a characteristic resonance mechanism. The method solves the problem that traditional static optimization neglects geometric nonlinear evolution to cause modal abrupt change, and the dynamic stability and evolution robustness of the spanning frame in the full stress process are remarkably improved while the structural light weight is achieved.
Owner:GUIZHOU POWER GRID CO LTD

A method for simulating flow of a liquid film at small reynolds numbers

The application discloses a small Reynolds number liquid film flow simulation method, which is based on a flow physical model, derives normal stress and shear stress balance conditions and motion boundary conditions of a liquid film surface under the action of gravity, airflow shear force and evaporation effect, and carries out non-dimensionalization and simplification on wall surface non-slip boundary conditions, flow mass equation and momentum equation and liquid film surface boundary conditions; aiming at small Reynolds number flow, the method is based on long wave theory to derive a differential equation of liquid film thickness evolution with time and space under the synergistic influence of gravity, airflow shear force and evaporation effect; the differential equation is subjected to weak nonlinear evolution analysis of wave, the change relationship of wave instability growth rate with gravity, airflow shear force and evaporation effect is obtained, and a change image of the influence of airflow shear force and evaporation effect on the liquid film wave instability growth rate is given.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Multivariate data acquisition and fusion analysis method and system for structural health monitoring

The application provides a multi-element data acquisition and fusion analysis method and system for structural health monitoring, comprising: acquiring target building or structure monitoring data by using an integrated multi-element sensor and transmitting; processing the monitoring data; establishing an LSTM neural network modal parameter prediction model and an LSTM neural network correction inclination prediction model and training; determining a modal parameter sequence and a correction inclination sequence for prediction, inputting the modal parameter sequence and the correction inclination sequence into the LSTM neural network modal parameter prediction model and the LSTM neural network correction inclination prediction model respectively, obtaining a modal parameter prediction sequence and an inclination prediction sequence, and performing trend analysis and early warning. The application effectively eliminates the influence of environmental parameters on the measured structure parameters and the prediction results, and the LSTM neural network is used to train and fit the measured data of buildings or structures under different conditions, so that the nonlinear evolution characteristics of the measured structure time series data can be expressed with high precision.
Owner:SHANGHAI JIAOTONG UNIV +1

A method for optimizing intelligent charging and discharging strategies for ship batteries

The present invention discloses a method for optimizing an intelligent charging and discharging strategy for ship batteries, which specifically relates to the technical field of battery management. The method collects propulsion power data, auxiliary equipment power data, and environmental disturbance parameters generated during ship operation to construct a high-frequency time-series operating condition input sequence, adopts a multi-scale dynamic modeling algorithm to establish a load nonlinear evolution model, and generates a disturbance perception prediction sequence. The method combines the historical charge and discharge state records of the target battery with the current current, voltage, and temperature sensor data to construct a heterogeneous state feature matrix, and then evaluates the charge state and health state of the battery. According to the evaluation results of the charge state and health state of the battery, an energy scheduling constraint map is constructed to generate a multidimensional strategy candidate set. The optimal strategy path is selected from the multidimensional strategy candidate set, and the target charge and discharge control instructions are output to achieve comprehensive optimization control of dynamic perception, state drive, and strategy adaptation of the ship battery.
Owner:GUANGZDONG YUEXIN OCEAN ENG +1

Controlled lengyel-epstein brain image classification method

The application discloses a controlled Lengyel-Epstein brain image classification method, and belongs to the technical field of brain tumor auxiliary diagnosis and medical image processing. The method comprises the following steps: firstly, acquiring a brain MRI image to be identified, and extracting a nonlinear index of a pretreated image to map to a high-dimensional calculation region; then, constructing a bivariate feature evolution field, acquiring a nonlinear evolution instruction set for an image classification task of a brain MRI data set, and applying the nonlinear evolution instruction set to the calculation region; monitoring a time evolution residual error of a feature vector potential energy component in the bivariate feature evolution field in real time, extracting a final stable polarity distribution of the feature vector potential energy component as a processing result, and realizing brain MRI image classification. The application solves the technical problem that a traditional reaction diffusion model cannot converge to a stable decision surface within a limited step, improves the brain MRI image classification accuracy, and has high robustness and interpretability.
Owner:NANJING UNIV OF INFORMATION SCI & TECH