65 results about "Uncertainty estimate" patented technology

The invention discloses a flowmeter self-calibration method and system based on big data analysis. The method comprises the steps that multi-source data collection is conducted, and multiple kinds of data are collected and stored in a big data platform with a block chain evidence storage function; data preprocessing: adopting multiple algorithms to improve data quality; feature extraction and analysis: identifying key factors and monitoring fluid states by means of multiple technologies; calculating calibration parameters, and considering various coefficients and uncertainty analysis; performing automatic calibration, encrypting and writing parameters after digital twin simulation, and reserving a copy; and verifying the calibration effect by adopting a multi-mode verification mechanism. The system comprises a plurality of functional modules which work cooperatively. According to the invention, the data acquisition comprehensiveness is improved, the calibration period is shortened, the production efficiency is improved, the data integrity and reliability are ensured, key factors are accurately identified, the fluid state is monitored in real time, the calibration parameter adjustment is simulated, and the calibration effect is verified in a multi-mode manner, so that the reliability and accuracy of a flowmeter measurement system are improved.

The invention provides a method and system for measuring resistance in an underwater vehicle towing test, and relates to the technical field of underwater vehicle hydrodynamic performance testing, and the method comprises three links of gravity center adjustment, measurement data processing and uncertainty analysis. Firstly, it is ensured that the gravity center and the buoyancy center of a test model are consistent in height, model attitude stability is ensured, and resistance measurement errors caused by attitude changes are eliminated. Secondly, measuring the sailing resistance of the test model in the towing test, and post-processing the measured data to obtain the total resistance coefficient of the test model at the test temperature; and finally, quantizing errors of each link and synthesizing expansion uncertainty by adopting a deviation limit and precision limit combined uncertainty analysis method. Compared with a traditional single-index evaluation method, the method not only can reveal error sources and quantify the influence of each link on the measurement result, but also can accurately reflect the composite effect of errors, and ensures the reliability of the resistance measurement result.

In various examples, systems and methods for uncertainty estimation for object detection in autonomous and semi-autonomous systems and applications are provided. The systems and methods may use data from one or more sensors (e.g., camera(s) and / or LiDAR sensor(s) to generate a representation of features surrounding a machine. A model may be used to generate probabilities of objects being present in the representation of features and uncertainty estimates corresponding to the object presence probabilities. The uncertainty estimates may be used to identify scenes that are significantly different from the training data, detect errors in the bounding shapes for objects, and / or highlight areas where object detections may have been missed. The systems and methods may also be used to auto-label scenes associated with the representation of features, and the auto-labeled scenes may be used for training purposes.

The invention provides a method and system for on-line determination of molten steel carbon content in converter steelmaking, and relates to the technical field of converter steelmaking, the method comprises the following steps: obtaining multi-source process data, the multi-source process data comprising exhaust gas components, furnace mouth flame multispectrum and process parameters; performing time synchronization and feature extraction on the multi-source process data to generate a feature vector; inputting the feature vector into a carbon content prediction model to obtain a carbon content prediction value and an uncertainty estimation value thereof; the molten pool temperature is obtained, and based on the molten pool temperature, the waste gas components and the technological parameters, a theoretical carbon content value is calculated through a thermodynamic carbon content calculation model; and carrying out weighted fusion on the carbon content predicted value and the theoretical carbon content value to generate a fused carbon content as a target carbon content. According to the method and system for online determination of the carbon content of the molten steel in converter steelmaking, the precision and reliability of online determination of the carbon content of the molten steel can be effectively improved, and powerful support is provided for intelligent production of converter steelmaking.

The invention discloses a storage tank measurement data processing method, computer equipment and a storage medium, and relates to the technical field of measurement modeling, and the method comprises the steps: collecting multi-physics field operation parameter data, carrying out the filtering, interpolation and abnormity elimination, and obtaining a multi-dimensional original data set; establishing a digital twin model based on the data set and calculating an initial parameter set; collecting real-time observation data, and executing residual optimization inversion to obtain a correction parameter set; performing uncertainty analysis and confidence weighted fusion by using the correction parameter set to obtain a fusion measurement parameter set; constructing a multi-objective cost function and updating the weight by adopting an exponential gradient evolution algorithm to obtain feed-forward control intensity; and in combination with the correction parameter set and the feedforward control intensity, carrying out cross-storage-tank robust aggregation and gating judgment to obtain new digital twinborn model parameters. According to the method, self-adaptive fusion and model closed-loop evolution of multi-source metering information are realized through confidence weighted fusion and an exponential gradient evolution weight optimization mechanism and by executing cross-storage-tank robust aggregation.

The invention discloses an electronic injection fuel injection strategy intelligent optimization method based on deep learning, and the method comprises the following steps: S1, collecting and preprocessing multi-source working condition data of an engine, and generating a standard data set; s2, constructing a Bayesian neural network model, and outputting an integrated fuel injection parameter prediction value and an uncertainty estimation value; s3, optimizing model structure parameters and hyper-parameters by using an ant lion optimization algorithm to obtain an optimal structure and parameters; s4, training the model by using the optimal structure and parameters, and performing performance evaluation by using a standard data set; s5, collecting working condition data in real time, and outputting an optimal integrated fuel injection parameter prediction value and an uncertainty estimation value; and S6, periodically collecting feedback data, training the model in combination with the standard data set increment, and re-executing ant lion optimization in good time. According to the method, high-precision intelligent optimization of the oil injection strategy of the engine is achieved, the fuel economy is improved, emission is reduced, and the self-adaptive capacity under the complex working condition is enhanced.

The invention discloses a damping adjusting method, device and equipment of an anti-snake-shaped shock absorber and a storage medium, belongs to the field of train shock absorption, and aims to consider that other disturbed quantities except the anti-snake-shaped shock absorber can be regarded as a whole (sum uncertainty) in relative head shaking angle information of a bogie. Therefore, the method comprises the following steps: firstly, determining a dynamic differential relational expression of the relative head shaking angle information of the bogie about the damping coefficient of the anti-serpentine damper and the sum uncertainty, and then determining a sum uncertainty estimator (used for outputting a sum uncertainty estimated value) of the bogie; according to the method, the target damping coefficient of the anti-snakelike damper can be determined based on the dynamic differential relation on the basis of the total uncertainty estimated value and the measured value of the relative head shaking angle information, so that the damping coefficient is dynamically adjusted, the method can adapt to complex and changeable operation conditions, and the transverse stability and riding comfort of a train are improved.

The invention provides an OTA test uncertainty analysis method and device, and the method comprises the steps: measuring an EIS pattern # imgabs0 # of a main antenna and an EIS pattern # imgabs1 # of a diversity antenna, carrying out the offset of # imgabs2 # according to a preset penalty term, obtaining a biased EIS pattern # imgabs3 #, obtaining a combined pattern # imgabs6 #, carrying out the calculation of a standard TIS calculation method, and obtaining a TIS value CTIStd-i-j, calculating to obtain a TIS value CTISSPOT-i-j by adopting a single-point compensation method, and calculating a difference value of the TIS value CTISSPOT-i-j; for each group of EIS directional diagrams and a preset penalty term, repeating the above calculation process to obtain a preset number of difference samples; taking the statistical distribution parameter value of the difference value sample as an uncertainty value introduced by the single-point compensation method in the multi-antenna receiving scene; judging whether the uncertainty value is within a preset limit value range or not; if yes, judging that the single-point compensation method meets the accuracy requirement of the OTA test in the multi-antenna receiving scene; and if not, judging that the single-point compensation method does not meet the accuracy requirement of the OTA test in the multi-antenna receiving scene.

The invention provides a wave-rider aircraft aerodynamic data uncertainty analysis method and device, and the method comprises the steps: obtaining the numerical calculation aerodynamic data of a wave-rider aircraft; factors influencing the uncertainty of the numerical calculation pneumatic data are determined; carrying out uncertainty analysis on the basis of pneumatic data, calculating model uncertainty by adopting a range method, designing an orthogonal test according to factors, calculating numerical value and input parameter uncertainty, and carrying out significance analysis on factor influence and interaction according to the orthogonal test; and calculating the total uncertainty according to the model uncertainty, the numerical value and the input parameter uncertainty, and verifying the reliability of the total uncertainty by adopting new sample data. According to the method, the uncertainty of the pneumatic data is comprehensively and effectively obtained, meanwhile, the influence factors of the uncertainty of the numerical calculation pneumatic data and the significance of the interaction are visually obtained, and support is provided for the reliability of the numerical calculation pneumatic data.

The invention relates to the technical field of image processing, and discloses an oral squamous cell carcinoma invasion depth measurement method and system based on artificial intelligence. The method comprises the steps of performing standardization processing on oral tissue slices through a three-dimensional preprocessing algorithm to obtain a tumor mask image and a confidence map, then performing multipoint sampling deployment of a virtual measurement agent on the tumor surface, detecting feasibility of an invasion path by using a tissue resistance model, performing multi-branch feature extraction and deep regression calculation through an OSCC-DepthNet network, and finally obtaining the tumor mask image and the confidence map through the OSCC-DepthNet network. And obtaining an invasion path and a depth value of each agent, fusing multi-agent measurement results by adopting a confidence weighting algorithm, and outputting an oral squamous cell carcinoma invasion depth value and an uncertainty estimation value. The technical problems that an existing oral squamous cell carcinoma invasion depth measurement method is insufficient in three-dimensional space measurement capacity, too high in calculation complexity, poor in real-time performance and lack of an effective uncertainty quantification mechanism are solved.

A computer-implemented method utilizing a continuous discrete recurrent Kalman network, wherein the method includes receiving, at an encoder, an input from one or more sensors, wherein the input includes one or more time series data associating data at one or more points in time; outputting, to a Kalman filter, a latent observation and uncertainty estimate in response to the input at the encoder; determining a latent state prior and latent state posterior utilizing the Kalman filter; and outputting, via a decoder, a filtered observation utilizing at least the latent state posterior.

The present application discloses a method for estimating uncertainty of a neural network model and related equipment, belonging to the field of data processing. The present application inputs data to be analyzed, performs prediction processing on the data to be analyzed based on a preset neural network model, and obtains analysis results of the data to be analyzed, wherein the analysis results include predicted values ​​of the data to be analyzed and uncertainty estimates of the preset neural network model; the preset neural network model is obtained by training undetermined parameters of target model parameters in a preset model to be trained, and the target model parameters are obtained by replacing original model parameters in the preset model to be trained with spike and slab distributions from point values; the analysis results are obtained by randomly sampling the target model parameters in the preset neural network model obtained after training, and predicting the data to be analyzed based on the target neural network model obtained by random sampling.

The present invention provides a model-based offline reinforcement learning training method that includes policy constraints and uncertainty estimation. First, the dynamic model is updated: the number of set members, the number of model forward predictions, and the model set, policy network, and value function network are initialized; static data are randomly sampled from the static data set and the model is updated based on it, and this step is repeated until the model converges. Secondly, the policy is updated: the sampled static data is predicted multiple times through the model to obtain predicted data and uncertainty estimates and the predicted rewards are subtracted from the uncertainty to obtain dynamic data; the dynamic data is put into the experience pool and static data and dynamic data are sampled from the static data set and the experience pool; the state in the dynamic data is input into the policy network and the model to obtain the prediction of the next state; the policy network and the value function network are updated through the static data, dynamic data, and the prediction of the next state, and the above-mentioned policy update steps are repeated until the policy network converges.

The application provides a rotary kiln energy consumption optimization method and system combined with visual recognition, comprising: preprocessing kiln operation data, and establishing a unified fusion feature representation; adopting a stacked long short-term memory network to process long-term dependence relationship, and simultaneously processing local time sequence mode through a multi-layer expansion convolution, and weighting and fusing the two kinds of features through a self-attention mechanism; in order to improve prediction reliability, training a plurality of basic models with different initializations and architectures, and applying a Bayesian model average technology to obtain a point estimate value, a prediction interval and an uncertainty estimate; based on the prediction model, constructing a graph structure representation of a kiln process parameter space, calculating a predicted coal consumption value of each parameter combination, thereby identifying an optimal process parameter combination, and realizing kiln energy efficiency optimization. The application improves coal consumption prediction accuracy and process parameter optimization efficiency.

The invention relates to an input parameter influence analysis method and system for nuclear power plant accident consequence evaluation, a medium and equipment. The method comprises the following steps: acquiring parameters required for evaluation; screening and setting parameters required by evaluation to generate a parameter information table; performing random sampling based on the input parameters to generate a random sampling matrix; calculating by using a random sampling matrix to obtain an accident consequence evaluation result; analyzing uncertainty and sensitivity based on the accident consequence evaluation result, and obtaining an uncertainty analysis result and a sensitivity analysis result of the input parameter; performing comprehensive analysis based on the uncertainty analysis result and the sensitivity analysis result to obtain a comprehensive analysis result; and determining an influence result of the input parameters according to the comprehensive analysis result. The uncertainty and sensitivity of the input parameters are analyzed, the influence degree of each parameter on the accident consequence evaluation result is effectively quantified, it is ensured that the nuclear power plant can make an accurate decision in time when a potential accident occurs, and the public and environment safety is effectively protected.

The invention relates to a belt weigher weighing precision optimization method based on uncertainty analysis. The method comprises the steps that multi-source reference data are acquired and synchronously collected, and standard weight information of a truck scale, real-time data information of a belt weigher and environmental parameter information of the same material batch are synchronously acquired; according to the standard weight information of the truck scale, the real-time data information of the belt weigher and the environmental parameter information, A-class uncertainty is calculated, a B-class uncertainty three-dimensional decomposition calculation model is constructed to calculate B-class uncertainty, and the uncertainty is synthesized to calculate the total uncertainty; component contribution analysis is carried out according to the error size of each component; gradient error two-dimensional control, wherein the gradient error two-dimensional control comprises hardware leveling, algorithm compensation, vibration control and temperature compensation; the comparison test is repeated after optimization, if the measurement error is not smaller than the expected threshold value, the gradient error two-dimensional adjustment control step is repeated until the measurement error is smaller than the expected threshold value, and the method has the advantages of achieving accurate targeted optimization of all error sources and the like.

This application describes a method for automatically labeling data samples with uncertainty quantification. The proposed method comprises the steps of simultaneously feeding an input data sample into an online object detection module with uncertainty estimation and an off-board object detector with uncertainty estimation; comparing the resulting data from both the online classification and uncertainty estimation module and the off-board classification and uncertainty estimation module; and deciding whether to discard the input data sample, send it for human labeling, or archive it along with the classification and uncertainty estimation from the off-board object detection module with uncertainty estimation.These uncertainty estimates are then used in the training phase of subsequent object detectors to weight different samples differently, with human-labeled samples and automatically labeled samples with high confidence receiving more weight.

The invention discloses an uncertainty analysis method and system for ship quay wall effect hydrodynamic force and a medium. The method comprises the following steps that a test error source is determined; calculating the deviation limit of the ship quay wall effect hydrodynamic force; calculating the precision limit of the ship quay wall effect hydrodynamic force; and calculating the uncertainty of the ship quay wall effect hydrodynamic force. According to the method, test error sources of ships limiting water areas are classified, influence factors of water depth and ship-shore distance are introduced into measurement of hydrodynamic force deviation, a calculation method of ship model navigational speed uncertainty is provided based on a circulating water tank, and a function relationship between ship shore wall effect hydrodynamic force and each test error source is established. The reliable hydrodynamic uncertainty can be obtained, and technical support is provided for analyzing the uncertainty of test results.

This specification provides an image detection method and apparatus, a target classification model, a computer-readable storage medium, an electronic device, and a computer program product. The method includes: first, determining a target classification model, which is trained using training samples from a first data domain, meaning it is suitable for detecting images to be tested in the first data domain. Based on the model, determining a first uncertainty estimate corresponding to a first target sample set from the first data domain, and determining a second uncertainty estimate corresponding to a second target sample set from a second data domain (another data domain). Further, based on the first and second uncertainty estimates, determining a feature offset, which characterizes the feature changes between the second and first data domains. Finally, based on the target classification model and the feature offset, determining the detection result for the image to be tested in the second data domain.

The present application relates to the field of geological disaster prevention, and particularly relates to a rainfall monitoring data driven small watershed geological disaster intelligent early warning method, comprising: obtaining historical rainfall data and geological disaster historical record data of a target small watershed for preprocessing; matching geological disaster events to corresponding rainfall events to obtain a rainfall event set in which geological disasters occur and serving as positive samples, and a rainfall event set in which no geological disasters occur and serving as negative samples; using the positive samples and the negative samples to construct a data set for learning, training and testing of a machine learning model; constructing an array of small watershed geological disaster intelligent early warning machine learning models and training, verifying and testing the array using the data set; constructing a target small watershed geological disaster occurrence probability calculation model and an uncertainty analysis model under the influence of a rainfall event, calculating the target small watershed geological disaster occurrence probability and uncertainty under the rainfall event, and performing early warning; and the present application improves the reliability and accuracy of small watershed geological disaster early warning results.

A system and method for distributed fiber-optic sensing (DFOS) event classification utilizing an energy-based generative artificial intelligence model. The method leverages a joint energy-based model (JEM) to ingest both human-annotated labeled sensing data and abundant unlabeled ambient sensing data collected from a DFOS interrogator. The joint energy-based model models the data distribution of high-dimensional spatial-temporal sensing signals, enabling semi-supervised classification that improves generalization, provides calibrated uncertainty estimates, and avoids domain-specific data augmentation constraints. The system further provides a test-time refinement mechanism utilizing Stochastic Gradient Langevin Dynamics (SGLD) updates in the input data space to remove the effects of sensor noise and recover discriminative classification accuracy upon deployment in pre-existing telecom cable networks.

This invention relates to the field of drug performance evaluation technology, and more particularly to a drug performance evaluation method and system based on chemical spatial clustering. The method includes: extracting structural features of known drug molecules from a calibration dataset and calculating chemical spatial distances; clustering the calibration dataset using a density-aware clustering strategy, performing statistical calibration within each chemical similarity cluster, and constructing a chemical spatial hierarchical calibration framework; using a graph neural network ensemble model to predict the drug performance of the drug molecule under test, obtaining prediction results and uncertainty estimates, determining the weights of each chemical similarity cluster based on structural features and the chemical spatial hierarchical calibration framework, and generating confidence intervals; adjusting the sensitivity of the confidence intervals according to the safety level corresponding to the drug performance under test, and outputting the prediction results and confidence intervals after a credibility assessment. This invention provides statistically reliable quantitative information for differentiated decision-making in early-stage drug development.

The present invention relates to the field of data processing technology, and specifically to a method and system for classifying and processing medical imaging data of lung malignant tumors, wherein the method comprises obtaining collected lung medical imaging data for preprocessing; establishing and training a lung malignant tumor data classification model based on the preprocessed data; obtaining medical imaging data to be classified and processed, and obtaining a data uncertainty estimate based on the lung malignant tumor data classification model; obtaining the data uncertainty estimate based on a three-branch decision theory comparison, and outputting a classification processing result through a terminal. By preprocessing, modeling, processing, and comparing the medical imaging data, a classification result is obtained, and the data classification processing accuracy is high, which is conducive to doctors making subsequent decisions quickly and accurately.

A software tool for predicting a candidate recipe for a food product using: (a) a predictor model trained to output, for a given candidate recipe passed as input to the predictor model, (i) a predicted value for at least one target variable and (ii) a predicted value for a given subset of evaluation variables, and (b) a generator model for: (1) training a base prediction model configured to output (i) a predicted value for at least one target variable of a space of a possible recipe and (ii) an uncertainty estimate for the predicted value, and (2) selecting a candidate recipe from the space of possible recipes based on (i) a balance between a predicted value output by the base prediction model and the uncertainty estimate and (ii) a set of constraints.

Techniques for localizing a vehicle in real time using dynamic uncertainty estimates are presented. The techniques include obtaining a terrain image captured by the vehicle; passing the terrain image to a trained evidential deep learning neural network subsystem, from which a dynamic uncertainty value and a first feature vector are obtained in real time; for each of a plurality of candidate terrain locations, comparing the first feature vector to a respective second feature vector representative of a candidate terrain location, from which a respective similarity score is obtained; for at least one of the plurality of candidate terrain locations, updating in real time, by a recursive Bayesian estimator, a respective location weight based on the dynamic uncertainty value and the respective similarity score; estimating, in real time, a location of the vehicle based on the plurality of location weights; and providing the location of the vehicle.

The invention relates to the technical field of road engineering material detection, in particular to an asphalt mixture density uncertainty analysis method and system.The method comprises the steps that an asphalt mixture detection piece is manufactured, an experimental scheme is designed, and then a test data set of the asphalt mixture detection piece is obtained; selecting an error factor in density uncertainty analysis according to the test data and the detection piece, and obtaining an uncertainty analysis result of the factor; constructing an error factor credibility evaluation model, and screening the error factors in combination with test data to obtain credible error factors; and obtaining an uncertainty comprehensive analysis result of the asphalt mixture density based on the credible error factor and the uncertainty analysis result, and realizing accurate analysis of the asphalt mixture density uncertainty. According to the method, credibility analysis and screening are carried out on error factors, the uncertainty condition of the density of the asphalt mixture can be reflected more truly, and the accuracy of an analysis result of the density of the asphalt mixture is improved.

This paper discloses a voxel-based uncertainty-based medical image segmentation model learning system, comprising five functional modules: an image acquisition module, a region of interest delineation module, an image preprocessing module, an uncertainty-guided image segmentation model training module, and a medical image segmentation model testing module. This system proposes an end-to-end voxel-based uncertainty-guided medical image segmentation model learning method, generating accurate segmentation results and reliable uncertainty estimates without excessively increasing computational burden and complexity, thereby simultaneously improving the performance, robustness, and interpretability of medical image segmentation models.

The present invention discloses a cable shielding effectiveness measurement device, method and uncertainty assessment method. The working area of ​​the device is provided with a cable to be tested, a matching load and a shielding calibration piece, which clarifies that the DUT is measured in the working area, fully utilizing the advantage of good field uniformity in the working area, so that the volatility of the measurement result is smaller; the matching load is placed outside the reverberation chamber, which reduces one radio frequency connection cable compared to placing the matching load outside the reverberation chamber, and greatly reduces the influence of leakage of the connection cable on the test result. The present invention adopts a comparative method measurement with the calibration piece as a reference. The shielding effectiveness of the calibration piece is stable and close to the shielding attenuation value of the cable to be tested, so that the level range of the spectrum reading is relatively concentrated, and it is easier to obtain relatively accurate measurement results, which has good practicality. The present invention makes the measurement results more reasonable and reliable through uncertainty analysis of the measurement results, which has good practicality.

This invention discloses a tracking control method for a flexible space robot arm based on a credibility-gated interval type-II fuzzy neural network, belonging to the field of space robot control. To address the technical problem of insufficient tracking accuracy in existing space robot arm tracking control methods, this invention establishes a dynamic model of the flexible space robot arm system considering lumped uncertainties. It then uses a credibility-gated interval type-II fuzzy neural network to approximate the lumped uncertainties in the dynamic model online, obtaining an estimate of the lumped uncertainty. The lumped uncertainty estimate, network compensation term, robust saturation term, and flexible modal active suppression term are jointly introduced into the nominal control law, simultaneously achieving high-precision joint tracking, floating base coupling compensation, and residual vibration suppression of flexible links for the floating-based flexible space robot arm under complex trajectory conditions. This method is primarily used for tracking control of flexible space robots.

The invention discloses a large-load scratching instrument calibration method based on multi-dimensional parameter uncertainty analysis, and relates to the technical field of material performance detection equipment calibration, and the method comprises the following specific steps: firstly, constructing an integrated system containing a normal force calibration module, a horizontal displacement calibration module, a friction force calibration module and a pressure head angle calibration module, and equipping related data equipment; preparing before calibration, mounting components, fixing materials and a pressure head, clearing a mark, presetting parameters and measuring times; then implementing a multi-parameter collaborative test, and collecting storage data; processing the data and carrying out uncertainty analysis; finally, determining a calibration result, giving a report if the calibration result reaches the standard, and adjusting and remeasuring if the calibration result does not reach the By constructing the integrated calibration system, multi-parameter collaborative testing is realized, full-process factors are controlled, calibration normalization and data integrity are improved, uncertainty analysis is carried out by adopting comprehensive evaluation, a judgment feedback mechanism is established, targeted adjustment and optimization are carried out, calibration precision and stability are effectively improved, the system is adaptive to multiple scenes, and the calibration efficiency is improved. Guarantee is provided for accurate operation of equipment, and the practical popularization value is enhanced.