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88 results about "Probabilistic forecasting" patented technology

Probabilistic forecasting summarizes what is known about, or opinions about, future events. In contrast to single-valued forecasts (such as forecasting that the maximum temperature at a given site on a given day will be 23 degrees Celsius, or that the result in a given football match will be a no-score draw), probabilistic forecasts assign a probability to each of a number of different outcomes, and the complete set of probabilities represents a probability forecast. Thus, probabilistic forecasting is a type of probabilistic classification.

Adaptive dynamic energy coordination device for integrated renewable and conventional energy networks

A data-driven dynamic energy management system for the adaptive coordination of renewable and conventional energy sources, consisting of: a processing unit configured to perform real-time calculations to optimize the generation, storage, and distribution of electrical energy by continuously analyzing operational data, forecasting future energy demand, and generating control instructions to match available generation resources with forecasted consumption demand; a storage unit connected to the processing unit, configured to store records of historical energy production and consumption, environmental data, operating thresholds and learned model parameters, and to provide said data as input for the forecasting and optimization routines performed by the processing unit; a multitude of IoT-based monitoring units, each comprising at least one sensor configured to measure instantaneous parameters of generation, storage level, consumption rate and environmental conditions, with each monitoring unit being configured to periodically transmit measurement packets to the processing unit via a secure communication network; a forecasting unit implemented in the processing unit, configured to process historical and real-time data to create forecast curves for demand and generation using statistical and probabilistic forecasting techniques, and to dynamically update the weights of the forecasting model in response to observed deviations between forecasted and actual output; an optimization control unit implemented in the processing unit and configured to evaluate the outputs of the forecasting unit together with current operational data to determine a set of optimized control variables representing the target generation contribution of each energy source, and to pass these targets to a lower-level controller for execution; a controller that is communicatively connected to the processing unit and the multiple energy generation sources and is configured to regulate the operation of each source by adjusting the activation state, output level and operating priority based on the control signals received from the processing unit; an energy storage management unit comprising at least one battery array and a power conditioning circuit, configured to receive control instructions from the processing unit, store excess generated energy, release stored energy when forecasted demand exceeds available generation, and report charging and discharging characteristics in real time to the processing unit for continuous recalibration; an alarm and notification control unit connected to the processing unit, configured to continuously compare storage levels and generation reserves with stored operating thresholds, trigger predefined responses when critical or abnormal conditions are detected, and transmit acoustic, visual, and digital remote alerts to designated operators; a user interface terminal connected to the processing unit, configured to display real-time generation statistics, demand forecasts, energy storage status, and system alerts, and to accept operator-defined parameter inputs that are transmitted to the processing unit for recalibration of forecast or optimization parameters; and a secure server interface configured to synchronize operational logs, learning data, and performance indicators with a remote monitoring or analysis server for centralized monitoring, long-term data analysis, and distributed decision support.
Owner:CONEJERO RIQUELME NATALIA ELOISA +4

Risk scheduling method for water-wind-solar complementary system

The invention discloses a risk scheduling method for a water-wind-solar complementary system, and the method comprises the steps: collecting historical data and power grid topological parameters, accessing global and regional numerical weather forecast data, employing a coupling model, fusing meteorological grid data with a historical power station output sequence, and generating hourly reservoir incoming water amount and wind-solar power probability prediction results. According to the predicted time sequence and the generated scene, calculating the scene probability based on the generated scene; according to the prediction time sequence, using a quantification method to obtain a peak regulation risk quantification value; calculating power grid power flow distribution and critical clearing time according to the generation scene and the power grid topological parameters, and calculating a system stability margin; a multi-target optimization model is constructed according to a peak regulation risk quantized value after splitting and a system stability margin, the system stability margin is introduced as an optimization target, the overall stability of the system is improved, a meteorological-hydrological-output three-mode feature mapping method is provided, and meteorological feature extraction of a key grid region is enhanced through an attention mechanism.
Owner:SICHUAN DATANG INT GANZI HYDROELECTRIC DEV CO LTD

Artificial intelligence system for anomalous activity detection using static and dynamic covariates

A training data set which includes event sequences representing actions of respective users of an application, properties of the users, and dynamic attributes associated with events such as the elapsed time between successive events, is prepared. A machine learning model which provides probabilistic predictions of next events of input event sequences is trained using the training data set. A trained version of the model is stored.
Owner:AMAZON TECH INC

Power system probability load prediction method, system and device, and storage medium

The invention discloses a power system probability load prediction method, system and device, and a storage medium, relates to the technical field of hydrogen energy ship power system load prediction, and aims to solve the technical problems that multi-source data and physical information rules are not integrated and multi-scale chaos in an HPV complex operation environment is not considered in the prior art. The method specifically comprises the steps of collecting and preprocessing multi-source data; screening strong correlation data by using the maximum information coefficient, and reconstructing multi-source data into a unified spatial-temporal characteristic matrix; constructing an electrical and environmental parameter chaos model based on a Lorentz dynamic equation as a physical constraint term of a loss function; a BERT-PINN framework with an attention mechanism is established, and multi-step probability prediction is realized through two-stage training. According to the method, the data driving model and the physical information rule of the multi-source data are effectively integrated, the feature fusion problem of the multi-scale chaotic features is solved, and the model prediction performance is improved.
Owner:SHANDONG UNIV

User load increase and probability boundary prediction method

The invention belongs to the technical field of electric power, and provides a user load increase and probability boundary prediction method, which comprises the following steps of: firstly, realizing unified projection and deep fusion of multi-source heterogeneous data by adopting a topological adaptive space-time fusion mechanism; secondly, physical constraint comparative learning and hypergraph clustering are utilized to generate a load-sensitive topology mode according with a power grid rule; a CPT-Mama model is constructed by injecting physical rules, meteorological codes and lightweight NTK features, and spatial correction is performed by means of a graph attention network to improve the precision of load increment prediction, so that efficient prediction of the multi-modal load increment is realized; and finally, innovatively introducing a net rack spectral domain built-in operator, reconstructing a residual error and quantifying uncertainty, and accurately describing a probability boundary of load increase. According to the method, the medium and long term load prediction precision is improved, the crossing from point prediction to probability prediction is realized, and reliable technical support is provided for power grid dispatching, risk prevention and control and planning decision.
Owner:GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU

Optimising transport routes

Computer-implemented methods optimising routes in a transport network for a geographical region are disclosed. Methods comprise obtaining an analysis of the geographical region; generating probabilistic predictions, checking whether at least a subset of the generated probabilistic predictions have previously been solved by a trained machine learning model; based on at least a first subset of the generated probabilistic predictions having previously been solved, retrieving the trained machine learning model previously used to solve the at least a first subset of the generated probabilistic predictions and executing the trained machine learning model to determine a first plurality of suggested routes for the transport network; based on at least a second subset of the generated probabilistic predictions not having previously been solved, training a new machine learning model to solve the at least a second subset of generated probabilistic predictions to determine a second plurality of suggested routes for the transport network.
Owner:FUJITSU LTD

Photovoltaic power station frequency modulation capacity prediction method based on space-time correlation

The invention discloses a photovoltaic power station frequency modulation capacity prediction method based on space-time correlation. The method comprises the following steps: firstly, screening main influence factors in numerical weather forecast data and photovoltaic power data by adopting a Pearson's correlation coefficient method; then constructing a space-time fusion diffusion model combining a training time weight perception mechanism and a multi-layer attention mechanism, improving prediction performance and training efficiency, and fully mining time sequence characteristics of photovoltaic power and spatial correlation of different environments; in the data generation stage, a back diffusion method of a denoising diffusion implicit model is adopted to generate a plurality of photovoltaic power curves of a day to be predicted; finally, probability intervals of photovoltaic power under different confidence coefficients are obtained through kernel density analysis, difference calculation is conducted on the probability intervals and a grid-connected limit value curve of a power grid, and probability prediction of the frequency modulation capacity is achieved. According to the method, the probability prediction precision and the operation efficiency can be considered, and a theoretical basis and a practical tool are provided for frequency modulation capacity declaration and consumption under a new energy power system.
Owner:THREE GORGES GRP ZHEJIANG ENERGY INVESTMENT CO LTD

Marine traffic flow probability prediction method based on multi-source AIS-meteorological data fusion

The invention discloses a marine traffic flow probability prediction method based on multi-source AIS-meteorological data fusion, and belongs to the field of marine traffic safety management, and the method comprises the following steps: S1, obtaining a standardized multi-source data set; s2, fusing the dynamic statistical characteristics of the AIS ship and the meteorological environment characteristics through a ship motion transfer function, and constructing a space-time patch considering a short-term ship motion trend and a long-term sea condition trend; s3, based on the space-time patch, fusing patch Transform time sequence modeling and adaptive dynamic graph space correlation learning to obtain a space-time fusion feature; and S4, outputting the traffic flow state prediction value and the probability distribution of the traffic flow key indexes. The marine traffic flow probability prediction method based on multi-source AIS-meteorological data fusion breaks through the limitation that a traditional method is single in data dimension, insufficient in space-time correlation capture and lack of probability confidence, and high-precision probability prediction of the marine traffic flow under the complex sea condition is achieved.
Owner:YANGSHAN PORT MARITIME SAFETY ADMINISTRATION OF THE PEOPLES

Multi-source data fusion-based stink traceability management and control method and related equipment

The invention discloses an odor traceability management and control method based on multi-source data fusion and related equipment. The method comprises the following steps: acquiring weather forecast and monitoring data of a target area, preset emission intensity of a pollution source and real-time odor concentration; inputting the real-time monitoring data and the emission intensity into an odor complaint probability prediction model to obtain a theoretical risk value, and calculating a real-time deviation factor between the theoretical risk value and an actual risk value obtained based on the real-time concentration; obtaining a first complaint risk probability value of a future time period by using weather forecast data and emission intensity, and performing weighted correction on the first complaint risk probability value based on the real-time deviation factor to obtain a second complaint risk probability value; and when the second complaint risk probability value exceeds a risk threshold value, reversely calculating target emission intensity capable of enabling the risk to reach the standard according to the model and the real-time deviation factor, and generating a production working condition adjustment instruction according to the target emission intensity. According to the method, the problem that a static prediction model cannot accurately describe a complex and changeable environment, so that mistaken report and missing report of stink traceability management and control are frequent is solved.
Owner:GUANGDONG ZHONGPU TECH CO LTD

Flood forecasting method fusing physical mechanism and conditional denoising diffusion model

ActiveCN122133082BHydrometryFlood forecast
The application discloses a flood forecasting method fusing a physical mechanism and a conditional denoising diffusion model, and comprises the following steps: obtaining multi-source hydrological data of a basin to be forecasted; driving a preset hydrological model to execute multi-stage sequential parameter optimization to obtain a basic forecasting sequence and an initial residual sequence; extracting multi-dimensional conditional variables based on the hydrological data and the initial residual sequence, and using a multi-dimensional evaluation criterion to perform dimension reduction screening to obtain a fusion conditional vector; inputting the fusion conditional vector as a guide condition into a pre-trained conditional denoising diffusion model, performing iterative denoising sampling through a multi-scale denoising operator to generate a forecasting residual probability sequence set; and coupling the basic forecasting sequence and the forecasting residual probability sequence set to obtain deterministic forecasting and probabilistic forecasting results of the basin to be forecasted. The application realizes a leap from single-point forecasting to probabilistic distribution deduction, can accurately obtain a flood deviation boundary under a changing hydrological environmental condition, and enhances the reliability of disaster prevention and mitigation decision-making.
Owner:HOHAI UNIV

Congestion probability prediction device and congestion probability prediction method

To provide a congestion probability prediction device capable of facilitating power generation control of power generation equipment with non-firm type connection while especially considering the uncertainties.SOLUTION: A disclosed congestion probability prediction device for predicting the congestion of a power system includes: a weather forecast data input unit that acquires weather forecast data regarding the weather a predetermined number of days after the current date; a power system data input unit that acquires demand data regarding electricity demand a specified number of days after the current date and that acquires system data regarding the power system after the predetermined number of days after the current date; a system congestion probability prediction unit that predicts congestion points and congestion probability data of the power system the specified number of days after the current date.SELECTED DRAWING: Figure 1
Owner:HIATACHI POWER SOLUTIONS CO LTD

Photovoltaic ultra-short-term probabilistic forecasting method based on data decomposition and reconstruction

PendingCN122436952AData setAlgorithm
The application discloses a photovoltaic ultra-short-term probability prediction method based on data decomposition and reconstruction, solves the problems of low prediction accuracy, weak generalization ability, poor prediction interval calibration, insufficient stability across data sets and low calculation efficiency of existing methods, and cannot meet the 5-minute ultra-short-term photovoltaic probability prediction engineering requirements. The method first collects and pre-processes photovoltaic power and meteorological data, uses the ACEEMDAN algorithm to decompose the photovoltaic power into fixed high-frequency and low-frequency dual components through four stages and regularizes; then the corresponding features of the three types of data are extracted through CNN, iTransformer and BiLSTM respectively, and the unified feature representation is obtained after the multi-head attention mechanism fusion, and then the EQN network is input; finally, the improved EQN loss function containing the width penalty term is used to train the model to convergence, and the probability prediction result is output. The method performs excellently in the deterministic and probability evaluation indexes, has strong stability across data sets, and can be directly applied to power grid dispatching and photovoltaic power generation system operation management.
Owner:XIAN UNIV OF TECH

Probabilistic solar generation forecasting for rapidly changing weather conditions

A method and system for probabilistic solar generation forecasting under rapidly changing weather conditions integrate copula theory with an extreme gradient tree boosting (XGBoost) classifier to enhance forecast accuracy. Historical weather data is partitioned into meteorological clusters, and bivariate copulas analyze spatiotemporal correlations to select optimal features. Multivariable Vine and Gaussian copulas model variable dependencies, with an XGBoost classifier dynamically selecting the optimal copula based on real-time weather conditions. Synthetic weather data, generated using the selected copula, captures uncertainties and is applied to a trained XGBoost regression tree to produce probabilistic forecasts. The method achieves up to 60% higher accuracy than conventional models under non-sunny conditions, leveraging Gaussian Kernel Density Estimation and Huber loss for robustness. The system supports real-time grid operations, offering reliable solar power predictions for diverse weather scenarios, validated with real-world data from multiple global locations.
Owner:SYRACUSE UNIVERSITY

A multi-objective power grid dispatching decision-making method and system

This application discloses a multi-objective power grid dispatching decision-making method and system, relating to the field of power grid dispatching technology. The method includes: constructing a normal dispatching objective based on minimum load fluctuation; constructing an abnormal weather dispatching objective based on minimum dispatching quantity and minimum dispatching loss; constructing a device abnormality dispatching objective based on minimum switching loss; constructing a multi-objective optimization function by combining the normal dispatching objective, the abnormal weather dispatching objective, and the device abnormality dispatching objective with initial priority weights; obtaining probabilistic prediction values ​​based on regional historical load data, regional real-time load data, regional historical weather data, regional real-time weather data, regional historical device maintenance data, and regional real-time device data; obtaining the dispatching weights for each dispatching objective based on the probabilistic prediction values; and updating the multi-objective optimization function with the dispatching weights to update the multi-objective power grid dispatching decision. The beneficial effects of this application are: balancing scenario switching flexibility and power dispatching accuracy when facing complex real-world scenarios.
Owner:ZHEJIANG SIJI TECH SERVICE CO LTD

Machine-learning architecture for end-to-end probabilistic forecasting

PCT designated stageWO2025215100A1ForecastingCommerceEngineeringProbit
State-of-the-art machine-learning models for forecasting fail to address the non- stationarity and uncertainty in data, rely on assumptions about data distribution, and / or produce unusable probability distributions. Accordingly, a machine-learning architecture for end-to- end probabilistic forecasting is disclosed to address these and other problems. In particular, the machine-learning model may utilize a persistence module that outputs a seed forecast value of a target variable, a neural-network stack that predicts incremental forecast value(s) of the target variable (e.g., using back-casting), and an aggregator that aggregates the seed forecast value and the incremental forecast value(s) to produce an aggregate forecast value of the target variable. In an embodiment, this aggregate forecast value may be input to an incremental quantile module that comprises a second neural-network stack to predict the forecast value of the target variable for each of a plurality of quantiles, and which aggregates these forecast values into a probability distribution.
Owner:HITACHI ENERGY LTD

Power prediction model evaluation method based on Bayesian model averaging and related device

The invention discloses a Bayesian model averaging-based power prediction model evaluation method and a related device, and belongs to the technical field of power system prediction. The method comprises the following steps: constructing a candidate model set comprising a plurality of power prediction models; secondly, historical data are used for training all the models, the posterior model probability of each model is calculated based on the Bayesian theorem, the posterior model probability serves as the scientific weight of the model, and the goodness of fit and complexity of the model are considered in the weight at the same time; and finally, for a new prediction input, performing weighted average on the prediction distribution of each candidate model by taking the posterior probability as the weight to generate comprehensive probability prediction distribution. According to the method, the advantages and disadvantages of each candidate model are scientifically evaluated through the posterior probability, and a comprehensive and probabilistic prediction result is finally generated, so that the robustness and reliability of prediction are improved, and richer decision information is provided for power grid dispatching.
Owner:HUANENG CLEAN ENERGY RES INST +1

Day-ahead electricity price prediction method and device based on real-time market demand prediction

The invention discloses a day-ahead electricity price prediction method and device based on real-time market demand prediction. The method comprises the following steps: acquiring a market game expected index and traditional market data in a historical transaction period; constructing a fusion feature matrix based on the market game expected indexes in the historical transaction period and the traditional market data; matching the fusion feature matrix with preset historical day-ahead electricity price data to generate a training data set; training the integrated probability prediction model according to the training data set to obtain a target integrated probability prediction model; acquiring a market game expected index and traditional market data of a to-be-predicted period to construct a to-be-predicted feature matrix; inputting the to-be-predicted feature matrix into a target integrated probability prediction model to obtain a prediction processing result; and according to the prediction processing result, generating a day-ahead electricity price single-point prediction value and a day-ahead electricity price prediction interval. By implementing the scheme, more comprehensive and reliable price signals and risk quantification information can be provided for the operation optimization decision of the power system.
Owner:BEIJING TRUTH WISDOM POWER TECH CO LTD

A joint probability prediction method for nodal electricity prices

This invention relates to the field of power system electricity price forecasting technology, and discloses a joint probabilistic forecasting method for nodal electricity prices, comprising: constructing a dual-state monitoring system to simultaneously track the physical state of the power grid and market liquidity indicators, generating physical constraint state vectors and market liquidity state vectors; designing critical early warning indicators by nonlinearly combining the degree of physical constraint and liquidity level; introducing a state-space mapping algorithm to divide the physical liquidity state space into stable, metastable, and critical regions, constructing a refined representation of the system state; based on a directed causal graph propagation mechanism model, tracking how changes in physical constraints affect market participant behavior and thus market liquidity; applying conditional extreme value theory to model extreme price distributions for identified critical states; and by establishing a coupled model of physical constraints and market liquidity, this invention effectively solves the technical problem that existing methods cannot capture the complex interaction between the two.
Owner:XIAN GUANGLIN HUIZHI ENERGY TECH CO LTD

Post-earthquake building ruin distribution range probability prediction model and urban road network blocking vulnerability estimation method

The invention belongs to the technical field of post-earthquake building falling object accumulation range probability prediction models and urban road network blocking vulnerability estimation, and discloses a post-earthquake building ruin distribution range probability prediction model and an urban road network blocking vulnerability estimation method. The building falling object accumulation range prediction model proposed based on the Bayesian theory considers multiple damage states of the building under the earthquake action, including building complete collapse and non-structural member damage; posterior probability distribution of unknown parameters of a prediction model can be obtained based on the Bayesian theory, and accordingly cognitive uncertainty from the model parameters is quantified in post-earthquake road blocking vulnerability evaluation. The method not only helps to improve the accuracy of post-earthquake road congestion risk assessment, but also helps to reasonably plan a post-disaster rescue evacuation path.
Owner:CHINA UNIV OF MINING & TECH

New energy output probability prediction method and device and electronic equipment

The invention discloses a new energy output probability prediction method and device and electronic equipment, which are applied to a probability prediction model and comprise a feature extraction module, a feature fusion module, a probability prediction module and a result output module. The method comprises the following steps: acquiring day multi-source data; extracting meteorological element features of the weather forecast data in a first preset time period through a feature extraction module, extracting image features of the remote sensing image data, and extracting time sequence features of the power data; fusing the meteorological element features, the image features and the time sequence features through a feature fusion module to obtain target fusion feature data; processing the target fusion feature data with the time sequence through a probability prediction module to obtain probability distribution of new energy power generation power; and analyzing the probability distribution through a result output module, and outputting a prediction result. According to the method, the complete probability distribution of the future output potential can be directly output, and a more comprehensive decision basis is provided for market participants.
Owner:DATANG HYDROPOWER SCI & TECH RES INST CO LTD +2

Quantitative evaluation method, device and equipment for power imbalance of new energy power system

The application provides a new energy power system power imbalance quantitative evaluation method, device and equipment, by considering the random volatility of uncertain power output and load demand and the mutual influence therebetween, a joint probability prediction model for different prediction time scales of a future to-be-evaluated period is constructed, and by using the joint probability prediction model and the working state information of the uncertain power and load in the time dimension provided by the operation scheduling plan, a probability distribution of the net difference of the uncertain power in the to-be-evaluated period is generated, the net difference of the deterministic power and load is considered, and the power imbalance distribution of the whole power system is accurately predicted, so as to provide accurate data support for the scheduling and operation of the power system.
Owner:TSINGHUA UNIVERSITY +1

Micro-grid operation stochastic optimization method based on source-load probability prediction

The invention discloses a micro-grid operation random optimization method based on source load probability prediction. The method comprises the following steps: firstly, performing energy-sensitive self-organizing segmentation on source-load historical time sequence data, and extracting morphological fingerprint features; and adopting an improved affinity propagation clustering algorithm fused with a power system operation constraint penalty mechanism to identify a typical operation mode. Secondly, a quantile regression model based on a gated pulse neural P system is established in each mode for probability prediction, and a probability scene library with weights is generated; and finally, constructing a two-stage stochastic optimization model with the goal of minimizing the expected operation cost, and solving by adopting a Benders decomposition algorithm to obtain a fixed equipment plan and a flexible operation strategy. According to the method, through refined mode recognition and probability modeling, on the basis of fully considering the uncertainty of the source load, robust optimization of economic operation of the micro-grid is realized, and the expected operation cost of the system is effectively reduced.
Owner:WUZHISHAN POWER SUPPLY BUREAU OF HAINAN POWER GRID CO LTD

Gnn-based building traffic energy coupling relationship modeling analysis method and system

The application discloses a building-traffic energy coupling relationship modeling analysis method and system based on GNN, relates to the technical field of energy management, performs cross-domain energy coupling relationship modeling on a target energy area, obtains a space-time heterogeneous graph network, performs hierarchical prediction to obtain a predicted load sequence, and imports a probability prediction model to determine a probabilistic prediction result; the heterogeneous graph structure and the probabilistic prediction result are subjected to coding and decoding reconstruction processing, and abnormal prediction data are located through reconstruction error; and the target energy area is managed according to the probabilistic prediction result and the abnormal prediction data, thereby solving the technical problems of difficulty in probabilistic adaptive prediction and efficient abnormal positioning under dynamic modeling of building-traffic coupling relationship in the prior art, being capable of adapting to energy consumption characteristic changes under different time periods and different passenger flow scales, and greatly improving the prediction accuracy and stable analysis capability of building-traffic coupling load.
Owner:THE ARCHITECTURAL DESIGN & RES INST OF ZHEJIANG UNIV CO LTD

ACAS X anti-collision decision-making method, system and equipment based on probability prediction

The invention provides an ACAS X anti-collision decision-making method, system and equipment based on probability prediction, and relates to the technical field of aviation safety, and the method comprises the steps: when a local machine detects a target machine, setting the relative motion state information of the two machines at an initial moment as an observation value at the initial moment, setting the variance at the initial moment as 0, and setting the variance at the initial moment as 0; constructing a state vector at an initial moment; establishing a discrete time system state equation for describing time evolution of the state vector; for each action in the candidate action set, on the basis of the state vector at the initial moment and a system state equation, online predicting future probability distribution of the state vector after the local machine executes the current action; based on the future probability distribution of the state vector, calculating the conflict probability of the local machine and the target machine in the future after the local machine executes the current action; and the action with the minimum conflict probability is determined as the optimal anti-collision decision instruction from the candidate action set, so that the problems of poor flexibility, difficulty in updating and insufficient real-time performance of an existing anti-collision system are solved.
Owner:SICHUAN JIUZHOU AIR TRAFFIC CONTROL TECHNOLOGY CO LTD

A method for predicting surface reflectance properties based on a microfacet model guided neural process

PendingCN122286145AData setAlgorithm
A neural process prediction method for surface reflection characteristics based on micro-surface model guidance is proposed. Current BRDF representations based on analytical models or deterministic neural networks perform poorly in complex material modeling and sparse sampling scenarios. There is a lack of standardized and accurate probabilistic prediction methods for tasks related to quantifying prediction uncertainty and analyzing and controlling error propagation. This invention forms an initial model by training a network on a completed BRDF dataset and applying physical guidance constraints. Based on the initial model, a probabilistic model of the bidirectional reflection distribution function is formed to create a family of BRDF function probability distribution models. The prediction process for reflection characteristics in unobserved directions is then completed based on the established family of BRDF function probability distribution models.
Owner:HARBIN INST OF TECH +1

Multi-time scale charging load and energy storage collaborative probabilistic forecasting method

The application discloses a multi-time-scale charging load and energy storage collaborative probability prediction method, relates to the technical field of power systems and smart power grids, and comprises the following steps: obtaining historical multi-source data of a target system and constructing causal subgraphs of different time scales; coupling the causal subgraphs into a time-cause feedback graph atlas through a structural mapping function, wherein the atlas contains explicit time-scale control nodes; performing cross-time-scale causal effect calculation based on the time-cause feedback graph atlas to generate a causal effect matrix; constructing a joint probability prediction model by using the causal effect matrix to output a first prediction result; and triggering a time-scale switching mechanism to generate a second prediction result when it is monitored that the deviation of the first prediction result exceeds a dynamic threshold. The application realizes multi-scale causal modeling by constructing a time-cause feedback graph atlas containing time-scale control nodes, combines a dynamic scale switching mechanism and a residual compensation mechanism, significantly improves prediction accuracy and scheduling adaptability, and realizes multi-time-scale collaborative optimization management.
Owner:ECONOMIC TECH RES INST OF STATE GRID ANHUI ELECTRIC POWER

Photovoltaic power multivariate probabilistic forecasting method and system based on hybrid evaluation score

This invention discloses a multivariate probabilistic prediction method and system for photovoltaic power based on mixed evaluation scores. The method includes: acquiring input information from multiple photovoltaic power plants at the time to be predicted, the input information including historical photovoltaic power generation and numerical weather forecasts; inputting the input information into a deep learning model trained with mixed evaluation scores as the loss function, and outputting the construction parameters of a conditional multivariate Gaussian mixture model; generating weights, means, and covariance matrices of multiple Gaussian components according to the construction parameters through fixed rules, and substituting them into the joint probability density function formula modeled by the conditional multivariate Gaussian mixture model to obtain the joint probability density function of future photovoltaic power generation from multiple power plants, thereby achieving joint probabilistic prediction of power generation from multiple power plants. This invention significantly improves the overall accuracy of multivariate probabilistic prediction and can accurately capture the power correlation characteristics between multiple photovoltaic power plants.
Owner:ZHEJIANG UNIV

Probabilistic prediction model of post-earthquake building debris distribution range and urban road network congestion vulnerability estimation method

The application belongs to the technical field of post-earthquake building collapse range probability prediction model and urban road network congestion vulnerability estimation, and discloses a post-earthquake building collapse range probability prediction model and a method for estimating the vulnerability of urban road network congestion. The building collapse range prediction model based on the Bayes theory considers various damage states of buildings under the action of earthquakes, including complete collapse of buildings and damage of non-structural components; the posterior probability distribution of unknown parameters of the prediction model can be obtained based on the Bayes theory, and thus the cognitive uncertainty from the model parameters is quantified in the post-earthquake road congestion vulnerability estimation. The application not only helps to improve the accuracy of post-earthquake road congestion risk assessment, but also helps to reasonably plan post-disaster rescue evacuation routes.
Owner:CHINA UNIV OF MINING & TECH

Physical constraint photovoltaic power probability prediction method, device, equipment and medium

The invention relates to a physically constrained photovoltaic power probability prediction method, device and equipment and a medium, and belongs to the technical field of new energy power generation prediction.The method comprises the steps that preprocessed regional operation data is acquired; on the basis of the preprocessed regional operation data, regional constraint characteristics at a preset future moment are calculated, an input characteristic set is generated according to the regional operation data and the preprocessed regional constraint characteristics, and the regional constraint characteristics comprise theoretical maximum power and irradiance uniformity indexes; inputting the input feature set into a preset quantile prediction model to obtain initial prediction results under different confidence degrees; constraining the power range boundary of the initial prediction result through a preset physical constraint and a theoretical maximum power to obtain a prediction optimization result; and performing uncertainty correction on the prediction optimization result based on the irradiance uniformity index, and dynamically adjusting the interval width of the prediction optimization result to obtain a final prediction result. The method has the effect of improving the power generation prediction accuracy.
Owner:NORTH CHINA BRANCH OF STATE GRID CORPORATION OF CHINA +1