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303 results about "Firefly algorithm" patented technology
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In mathematical optimization, the firefly algorithm is a metaheuristic proposed by Xin-She Yang and inspired by the flashing behavior of fireflies.
Short-term electric power load prediction method considering meteorological factors
InactiveCN106779129AReduce workloadImprove forecast accuracyClimate change adaptationForecastingLoad forecastingPower grid
The invention discloses a short-term electric power load prediction method considering meteorological factors, and belongs to the technical field of electric power load prediction. The method includes: collecting historical load data and meteorological data, and detecting and correcting abnormal data; analyzing the relevance between the load data and the meteorological factors, and determining key meteorological factors; establishing comprehensive meteorological factors according to the relevance between the load and the key meteorological factors; summarizing change characteristics of a daily load curve of a regional power grid, and finding out typical similar days of a prediction day; establishing an Elman neural network short-term load prediction model by employing the selected load and the comprehensive meteorological factors, and training network parameters by employing a firefly algorithm; inputting the comprehensive meteorological factors of a to-be-predicted moment and the corresponding load data to the Elman neural network short-term load prediction model, and outputting a load prediction value of the to-be-predicted moment; and displaying the load prediction value. According to the method, the load data of weekdays, weekends, and official holidays can be accurately predicted, the prediction precision is high, the applicability is high, and reliable basis is provided for making of generation plans for operation personnel of the power grid.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
Route planning method based on multi-target glowworm swarm algorithm
ActiveCN102768536ASolving Multi-Objective Optimization ProblemsUse global searchNavigation instrumentsPosition/course control in two dimensionsAlgorithmPlanning approach
The invention provides a route planning method based on a multi-target glowworm swarm algorithm and belongs to the technical field of route planning. The method includes: modeling a route planning problem, initializing the multi-target glowworm swarm algorithm, updating the glowworm position, determining a non-inferior solution set, updating an external archived file, judging whether a preset maximum iteration number is achieved or not, and determining a Pareto optimal route. The basic glowworm swarm algorithm is improved based on the Pareto dominant conception, and global searching and parallel computing capacities of the glowworm swarm algorithm are well used. Multiple route performance indexes are considered simultaneously during planning, a group of Pareto optimal solution sets can be obtained by planning once, and high flexibility is achieved. Further, the route panning method is different from traditional route planning methods for a single target and route planning methods of using a weighing method to convert multiple targets into the single target, and can better meet practical requirements of route planning.
Owner:哈尔滨哈船导航技术有限公司
Naval vessel path planning method based on firefly algorithm
ActiveCN102360214AImprove execution efficiencyAdaptive controlPosition/course control in two dimensionsSimulationPlanning approach
The invention discloses a naval vessel path planning method based on a firefly algorithm, concretely comprising the following steps of: (1), determining an initial point and a target point of a path according to task information and determining a navigation zone according to the initial point and the target point; (2), establishing a new coordinate system by adopting the initial point as the origin and adopting the connecting line of the initial point and the target point as the axis of abscissas; (3), simplifying and combining barriers in the navigation zone and generating a restricted navigation zone; (4), searching an optimal path through the firefly algorithm; (5), converting the coordinate of each path point in the optimal path into a coordinate under an O-XY system; and (6), obtaining the optimal path of a naval vessel and ending the path planning. By planning the path of the naval vessel through the adoption of a new natural heuristic algorithm, namely the firefly algorithm, as an optimization algorithm, the naval vessel path planning method based on the firefly algorithm has high executing efficiency and can plan navigation paths which meet the practical demands.
Owner:HARBIN ENG UNIV
Production-data-driven dynamic job-shop scheduling rule intelligent selection method
ActiveCN107767022ATimely and accurate dynamic responseScheduling results are excellentGenetic modelsForecastingOptimal schedulingJob shop scheduling
The invention provides a production-data-driven dynamic job-shop scheduling rule intelligent selection method and belongs to the manufacturing enterprise job shop production planning and scheduling application field. The method mainly comprises the following steps: introducing a Multi-Pass algorithm simulation mechanism, establishing a job-shop production scheduling simulation platform, and generating production planning and scheduling sample data; screening the obtained sample data and generating a scheduling parameter set; designing BP neural network models for scheduling knowledge learningunder different scheduling targets; optimizing training of the BP neural networks through a new firefly algorithm to obtain NFA-BP models; integrating the NFA-BP models under various scheduling targets into an intelligent scheduling module, which is integrated with a job shop MES system to guide on-line scheduling; manually adjusting online production planning and scheduling deviation and updatingthe scheduling parameter set, and the intelligent scheduling module carrying out online optimization learning; and the intelligent scheduling module adapted to real workshop production status outputting optimal scheduling rules according to current job conflict decision points.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Network security situation prediction method based on improved BPNN (back propagation neural network)
ActiveCN106453293AAccurate predictionImprove prediction convergence speedTransmissionNODALChaos theory
The invention relates to the technical field of network security evaluation, in particular to a network security situation prediction method based on a combination of the chaos theory and a neural network. The method comprises the following steps: carrying out processing of normalized network security situation value sequence sets through the mutual information method and the cao method to obtain the optimum embedded dimensions of network security situation sample values, carrying out phase-space reconstruction, and analyzing the maximum Lyapunov exponent of reconstructed samples to determine whether the evaluated samples have chaos predictability or not; determining the numbers of nodes of an output layer and a hidden layer of a BPNN according to characteristics of a nonlinear time sequence and experience; carrying out parameter optimization through an improved firefly algorithm, so as to determine network weights and offset values and establish a network security situation prediction model; and inputting test set samples into the BP neutral network for prediction, and carrying out denormalization of obtained prediction values. The method provided by the invention has the advantages that a network security situation can be more precisely predicted, and the network security situation prediction convergence rate can be increased.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Improved fireflyalgorithm based AUV (autonomous underwater vehicle) three-dimensional track planning method
InactiveCN103968841AQuick planningImprove search accuracyNavigational calculation instrumentsPlanning approachSelf adaptive
The invention belongs to the technical field of three-dimensionalpath planning for underwater vehicles, particularly relates to animproved fireflyalgorithm based AUV (autonomous underwater vehicle) three-dimensional track planning method and provides an improved fireflyalgorithm based AUV three-dimensional path planning method. The method comprises the steps as follows: performing modeling and fireflypopulation initialization on the three-dimensionalpath planning for the underwater vehicles; calculating objective function values; calculating self-adaptive parameters; comparing thebrightness among fireflies, and updating positions of the fireflies; adding auxiliary planning operators; outputting optimal pathswhen meeting algorithmiteration stop conditions, ending the three-dimensionalpath planning for the underwater vehicles, and outputting an optimal path of the last iteration. Themethodis more flexiblethan a traditional path search algorithm, the auxiliary planning operators are added, and quick planning of AUV three-dimensional paths can be realized.
Owner:HARBIN ENG UNIV
Grid structure planning method for coordinated power transmission and distribution
ActiveCN105141464AGuaranteed reliabilityMeet the transfer demandNetworks interconnectionElectric power transmissionTransformer
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Multi-objective flexible job shop scheduling method based on discrete firefly algorithm
The invention provides a multi-objective flexible job shop scheduling method based on a discrete firefly algorithm. The method comprises the steps that a mathematical model is established for a multi-objective flexible job shop scheduling problem; a segment coding method is used to code a firefly, and a machine selection part and a process sorting part are divided; the discrete firefly algorithm is used to optimize the model to acquire a Pareto optimal solution set; and a solution corresponding to the actual need is selected from the Pareto optimal solution set, and decoding is carried out to output machine selection position information and process sorting position information. Compared with the existing method, the multi-objective flexible job shop scheduling problem optimizing method has the advantages that the global optimization ability of the algorithm is improved; the overall processing time is shortened; the job shop production cost is reduced; and the method meets actual production needs.
Owner:XIANGTAN UNIV
Traffic flow prediction method based on firefly algorithm and RBF neural network
InactiveCN106910337AIncrease diversityImprove global search performanceDetection of traffic movementPhysical realisationRandom methodTraffic flow
The invention proposes a traffic flow prediction method based on firefly algorithm and RBF neural network. The method comprises: performing normalization to the sample data so that the input data and output data are on the same order of magnitude; initializing the firefly algorithm parameters; utilizing the random method to initialize the firefly populations and encoding each individual in the populations; using the firefly algorithm to train the RBF neural network to obtain the best individual in the populations; decoding the best individual in the populations to obtain the trained RBF neural network; and utilizing the trained RBF neural network to predict the traffic flow data sample. Compared with the traditional traffic flow prediction method, the method of the invention makes full use of the advantages of the firefly algorithm in the RBF neural network training so that the RBF network possesses a more accurate prediction capability, achieves even faster training efficiency and better generalization capability. The invention belongs to the traffic transportation information engineering technology field and can be used for the predictions of road traffic flows in an intelligent traffic system.
Owner:CHANGAN UNIV
Ship route planning method based on tidal current and tide prediction information
The invention provides a ship route planning method based on tidal current and tide prediction information. The ship route planning method comprises the following steps of: 1, determining the start point, the target point, the planning leaving time and the planning arriving time of a route according to task information, and determining the sailing region according to the start point and the target point, and determining the prediction time range of tidal current and tide according to the leaving and arriving the leaving and arriving times; 2, predicting tidal current and tide according to the sailing region and the prediction time range which are determined in the step 1, acquiring tidal current and tide prediction data which is required by route planning, and storing the data into a file; 3, interpolating based on discrete water depth data in an electronic chart, and acquiring grid water depth data within the sailing region; 4, dividing the sailing region into a seaworthiness region and a prohibited navigation region according to the grid water depth data, the tide prediction data and barrier information in the sailing region; and 5, searching for a best route by an improved firefly algorithm, thus acquiring a route meeting economical and safety requirements. According to the invention, the economical, safe and practical sailing route can be planned.
Owner:HARBIN ENG UNIV
Shared car sharing site layout and selection model
ActiveCN107316208AFix layout issuesArtificial lifeBuying/selling/leasing transactionsCar sharingFirefly algorithm
The invention discloses a shared car sharing site layout and selection model. The implementation process of the model includes the following steps of: establishing a shared rental car site selection cost model; establishing a network effect-based shared car rental profit model; establishing the objective function model of marginal costs and marginal profits; and using a firefly algorithm to simulate the objective function model. With the model adopted, problems in site layout with a strong network effect can be solved; and an improved firefly algorithm-based site selection model represented by sharing shared cars is built.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
Wireless sensing network coverage optimization method based on virtual force and firefly algorithm
ActiveCN107295541AIncrease coverageImprove deployment efficiencyNetwork topologiesCoverage ratioMathematical model
Owner:YANGZHOU UNIV
Flexible job-shop scheduling optimization method
ActiveCN107817772AImprove global search performanceImprove calculation stabilityProgramme total factory controlJob shop schedulingJob shop scheduling problem
The invention relates to a flexible job-shop scheduling optimization method, which applies the Metropolis criterion and the sinusoidal adaptive step length to a firefly algorithm so as to optimize andsolve a discrete problem. On the basis of building a mathematical model, an initial solution population of a discrete combination problem is randomly generated, then local search in an individual domain is performed according to the Metropolis criterion in simulated annealing to generate a new individual, the internal energy difference between the new individual and the original individual is calculated, the new individual is accepted according to a certain probability, and global search is performed on each generation by using the discrete firefly algorithm with the sinusoidal adaptive steplength until an optimal solution is searched. The method can better search an optimal solution of the FJSP (Flexible Job-Shop Scheduling Problem) in the global space and has better search precision, search efficiency and stability, thereby having important significance and significant engineering practical application values for solving discrete problems such as job-shop scheduling.
Owner:SOUTHWEST JIAOTONG UNIV
Wind-driven generator three-phase rotor current micro-fault diagnosis method
ActiveCN107192951AReduce uncertaintyImprove diagnostic efficiencyDynamo-electric machine testingWind drivenData set
The invention discloses a wind-driven generator three-phase rotor current micro-fault diagnosis method. The method comprises the first step of extracting fault information of three-phase rotor current to obtain a training data set, a confirmed data set and a testing data set; the second step of constructing a double-layer sparse bayes extreme learning machine model; the third step of creating a pairing multi-label classification method, and constructing a classifier set based on a micro-fault diagnosis algorithm model through the combination of a double-layer sparse bayes extreme learning machine; the fourth step of using the training data set to train the micro-fault diagnosis algorithm model, using the confirmed data set and a firefly algorithm to conduct dynamic optimum-seeking iteration, and finally determining an optimal parameter to complete the micro-fault diagnosis algorithm model; the fifth step of inputting the testing data set into the micro-fault diagnosis algorithm model to obtain a diagnosis result of a micro-fault. According to the wind-driven generator three-phase rotor current micro-fault diagnosis method, the wind-driven generator three-phase rotor current micro-fault can be diagnosed, and the wind-driven generator three-phase rotor current micro-fault has the advantages of being high in diagnosis efficiency, and high in diagnosis precision.
Owner:HUNAN UNIV OF SCI & TECH
Mobile robot path planning method based on chaotic firefly algorithm
ActiveCN106094833AImprove search capabilitiesFast convergencePosition/course control in two dimensionsVehiclesLocal optimumSimulation
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Power transformer fault diagnosis method and system based on improved firefly algorithm optimization probabilistic neural network
InactiveCN110363277AImprove classification performanceFast searchCharacter and pattern recognitionArtificial lifeAlgorithmDiagnosis methods
The invention discloses a power transformer fault diagnosis method based on an improved firefly algorithm (PFA) optimized probabilistic neural network (PNN). The power transformer fault diagnosis method comprises the following steps: firstly, collecting fault characteristic gas by using a gas chromatographic analysis method and carrying out pretreatment by using a fused DGA algorithm; initializinga PNN neural network, a firefly algorithm and a two-dimensional particle swarm; taking the PNN smoothing factor as a firefly individual, and calculating the position and brightness of the firefly; feeding the solving result of each firefly algorithm back to the particle swarm algorithm, carrying out fitness evaluation on each particle, and updating the positions and speeds of the particles; carrying out loop iteration, substituting the obtained optimal smoothing factor into the PNN to carry out fault prediction, and training a PNN model after PFA optimization; inputting a test sample, and outputting a fault type result, thereby achieving the fault diagnosis of the power transformer. The method is high in search speed, high in diagnosis precision, small in error, and obvious in classification effect.
Owner:NANJING UNIV OF TECH
Firefly grouping method, as well as power dispatching system and power dispatching method based on same
InactiveCN103034904AImprove search efficiencyFast convergenceSingle network parallel feeding arrangementsBiological modelsGroup methodGroup operation
The invention discloses a firefly grouping method, as well as a power dispatching system and a power dispatching method based on the same. The firefly grouping method comprises the following steps: setting each parameter and initializing groups; figuring out a target value of each firefly particle and sequencing the groups according to levels of the target values; carrying out grouping operation on the groups; independently carrying out evolutionary optimization on each sub group in parallel according to a firefly algorithm; after number of iterations is reached, stopping evolutionary optimization of each sub group; combining all sub groups into one group; then carrying out optimized evolution on the total group according to the firefly algorithm; and after the number of iterations is reached, repeating the above steps until the iterations with the number of iterations are finished or requirements on the experimental accuracy are satisfied. According to the invention, the capacity of each unit is reasonably configured, so that load requirements can be satisfied through power generation of the power system, and low cost is obtained; moreover, through grouping and clustering circulation, information is shared, so that groups are prevented from falling into local extreme value; and finally, a better dispatching scheme can be obtained.
Owner:SHANGHAI DIANJI UNIV
Opportunity network evolution algorithm and device for promoting node cooperation
The invention provides an opportunity network evolution algorithm for promoting node cooperation. The algorithm comprises the following steps: firstly, establishing a socialized distributed credit model, including creditability quantification, a direct credit computation method, and an indirect credit evaluation method; secondly, establishing a corresponding incentive model based on creditability, including a creditability-based payoff function design, a creditability optimization based self-adaptive learning mechanism, and the like; thirdly, establishing a multi-population asymmetric evolution model, including multi-population classification, a strategy updating mechanism, and the like; and finally, designing and achieving the evolution algorithm based on the models, including a security cooperation evolution algorithm, and a firefly algorithm for solving the problem of searching the optimum among multiple objects. The evolution model, the credit incentive model and the credit evaluation method provided by the invention are applicable and reliable, and a dynamic security mechanism is operable.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Improved-firefly-algorithm-based multi-unmanned-aerial-vehicle cooperative coupling task distribution method
InactiveCN107219858ASolve task assignment problemsImprove versatilityArtificial lifePosition/course control in three dimensionsTemporal couplingMathematical model
The invention, which relates to the task planning design field, provides an improved-firefly-algorithm-based multi-unmanned-aerial-vehicle cooperative coupling task distribution method. A hybrid discrete firefly algorithm with a special coding-decoding structure is provided; and on the basis of the study on multi-unmanned-aerial-vehicle cooperative task distribution with a time coupling constraint and a special coupling constraint simultaneously, a mathematic model is put forward and task resolving is carried out. The method provided by the invention has high universality. On the basis of the analysis of data obtained by multi-times simulation and verification, the model is perfected, the iterative process becomes short, and the convergence speed is fast. The multi-unmanned-aerial-vehicle cooperative task distribution plan is expressed effectively by means of segmented integer coding by using minimization of the maximum range of the unmanned aerial vehicle as an overall optimization objective; and an optimal solution is searched in the solution space based on an improved DE-DFA algorithm, so that a multi-unmanned-aerial-vehicle task distribution problem in a coupling task environment is solved and a solution is provided for solving a multi-unmanned-aerial-vehicle task distribution problem in a coupling task environment.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Automatic path programming method of mobile robot, and mobile robot
ActiveCN105911992AFast automatic planningAccurate automatic planningPosition/course control in two dimensionsSimulationFirefly algorithm
The invention discloses an automatic path programming method of a mobile robot, and the mobile robot using the method. The method comprises the following steps of: collecting environment information; according to the collected environment information, carrying out modeling on an area in which path programming of the mobile robot is carried out so as to construct a two-dimensional plane coordinate map, and determining a start point, a stop point and coordinate positions of obstacles; based on the two-dimensional plane coordinate map, carrying out path optimization on the paths from the start point to the stop point by means of population initialization based on a Sobol sequence and a firefly algorithm of a dynamic adjustment disturbance coefficient update population, and programming the optimized path to for driving in the two-dimensional plane coordinate map; and according to the optimized path after programming, driving the mobile robot to move. According to the invention, the problem that an existing firefly algorithm is insufficient in convergence performance is overcome, the mobile robot is enabled to rapidly, accurately and automatically program the path, and the path programming capability of the mobile robot is improved.
Owner:GUANGDONG POLYTECHNIC NORMAL UNIV
Power distribution network state estimation method based on firefly algorithm
InactiveCN104578051AMeet application needsSimple methodData processing applicationsAc network circuit arrangementsNODALFirefly algorithm
The invention provides a power distribution network state estimation method based on a firefly algorithm. The method comprises steps as follows: Step 1, generating a power distribution network node admittance matrix; Step 2, initializing fluorescein and dynamic decision domains of fireflies; Step 3, updating the fluorescein of the fireflies; Step 4, calculating the distance between the fireflies to acquire neighborhoods; Step 5, calculating the movement probability of the fireflies; Step 6, updating positions of the fireflies; Step 7, updating the dynamic decision domains of the fireflies; Step 8, judging whether a convergence condition is satisfied or not, if the convergence condition is satisfied, ending the process, executing Step 9, and otherwise, executing Step 3; Step 9, outputting an optimal solution. According to the method, node voltage is used as a state variable, the node injection power is calculated, an objective function value of the least square method is taken as a firefly fitness function value and converted into the fluorescein of the fireflies, the state variable is updated continuously, and the firefly position with the highest fluorescein is taken as the optimal state estimation result. Experiments indicate that the method has good accuracy and adaptability.
Owner:张海梁
Analog circuit fault diagnosis method based on chaos cloud model adaptive firefly algorithm
ActiveCN108828436AAddress deficienciesFast convergenceAnalog circuit testingArtificial lifeNODALFeature set
The present invention discloses an analog circuit fault diagnosis method based on a chaos cloud model adaptive firefly algorithm. The method comprises the steps of: applying a certain test stimulus toa tested circuit, and collecting output response signals of the tested circuit at a measurable node of the circuit; employing the wavelet fusion method to perform extraction of a circuit fault feature set from the output response signals; employing the CCAFA-LSSVM (Chaos Cloud Model Adaptive Firefly Algorithm-Least Squares Support Veotor Maohine) to perform fault diagnosis of the fault feature set to achieve classification and location operation of the circuit faults. The analog circuit fault diagnosis method employs a cloud model with a capacity of processing object fuzziness and randomnessto perform corresponding improvement of the firefly algorithm and allow the firefly algorithm to have a good generalization ability and a high robustness. Therefore, when the fault diagnosis is performed, the resolution ratio of the fault mode is high, the diagnosis performance is good, and the fault elements can be accurately located, and the diagnosis performance and the efficiency of the testedanalog circuit can be improved.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Intelligent monitoring and diagnosis method for fault state of wind turbine generator system
ActiveCN109444740AReduce complexityImprove diagnostic accuracyDynamo-electric machine testingElectricityMathematical model
The invention discloses an intelligent monitoring and diagnosis method for a fault state of a wind turbine generator system. The method comprises the following steps of establishing a nonlinear modelof the wind turbine generator system by means of a partial least square method; constructing a fault predicating model according to an extreme learning machine, chaotic mapping and a firefly algorithm; establishing a DBN-ELM fault diagnosis model through deep belief learning and the extreme learning machine; performing state monitoring on the set through calculating a residual error between a nonlinear mathematical model and a prediction model, determining whether a fault of the wind turbine generator system occurs, and starting the fault predicating model for diagnosing and positioning the fault. According to the method of the invention, the nonlinear model of the wind turbine generator system is established by means of the partial least square method; and then the fault diagnosis model is constructed according to the extreme learning machine, chaotic mapping and the firefly algorithm; and fault monitoring is performed through combining the nonlinear model and the fault diagnosis model; once an alarm of the monitoring model occurs, the DBN-ELM model is started for diagnosing and positioning the fault, thereby reducing fault monitoring complexity and improving fault diagnosis correct rate.
Owner:HUNAN UNIV
Island dividing method for power distribution network comprising distributed power supply
ActiveCN106026092AEnsure safetyGuaranteed stabilitySingle network parallel feeding arrangementsPower flowIslanding
The invention discloses an island dividing method for a power distribution network comprising distribute generation (DG). The island dividing method relates to the field of power supply technologies. The island dividing method implements the optimal island system formation method under the condition of considering output of the DG and load demand uncertainty, can determining the maximum possible island according to real-time situation, and has higher reliability when compared with an island under the condition of certainty. The island dividing method comprises the steps of: establishing a probability model of the DG and loads while considering output of the DG and load demand uncertainty, adopting a Monte Carlo method to carry out sampling tests, and predicting power supply output and load demand; simplifying a topological structure of the power distribution network into an undirected weighted graph while considering importance of the loads; solving an island dividing model by adopting an improved firefly algorithm to obtain a preliminary island; and adjusting and verifying the preliminary island by adopting a probabilistic power flow and sensitivity verification algorithm.
Owner:NANJING INST OF TECH
Sewage energy saving processing optimization control method based on improved firefly algorithm and least squares support vector machine
PendingCN107085372AImprove learning effectImprove generalization abilityAdaptive controlAlgorithmWater quality
The invention discloses a sewage energy saving processing optimization control method based on an improved firefly algorithm and a least squares support vector machine, and belongs to the field of intelligent control. The method comprises steps of using a multicore least squares support vector machine to model energy consumption and water quality of discharged water of a sewage processing factory; using the improved firefly algorithm to optimize established model parameters; and using the improved firefly algorithm to optimize a set value of the controller. According to the invention, the least squares support vector machine is used for modeling energy consumption and water quality of discharged water of a sewage processing factory; a multi-core idea is introduced; the improved firefly algorithm is used for optimizing model parameters, so accuracy of an energy consumption model and a discharged water quality model is greatly improved; the improved firefly algorithm is used for carrying out online optimization on set values of dissolved oxygen concentration and nitrate nitrogen concentration of the controller, so under the premise of meeting the discharged water quality, the energy consumption of the sewage processing factor is reduced; an objective of saving energy and carrying out optimization in the sewage processing process is obtained; and compared with other algorithms, the method is characterized by simple algorithm, few used parameters and high convergence accuracy.
Owner:HUNAN UNIV OF TECH
A river water level prediction method based on chaotic fireflies and a gradient lifting tree model
PendingCN109711636AOptimization of training parametersImplement classificationForecastingCharacter and pattern recognitionAlgorithmPredictive methods
The invention provides a river water level prediction method based on chaotic fireflies and a gradient lifting tree model, and relates to the technical field of information and hydrological conditionprediction. Firstly, data is collected, and required data is divided into five classes; and then data preprocessing is carried out, including abnormal value elimination, missing value processing and data normalization. The improved chaotic firefly algorithm is used for optimizing training parameters of the gradient lifting tree model, and the improved gradient lifting tree model is applied to river water level prediction research of structural data. Finally, constructing a training sample set;randomly adopting a part of five types of data obtained after processing for model training; accordingto the method, a GSO algorithm is used for optimizing and parameter tuning is carried out to obtain a GBDT model under optimal parameters, the generalization ability is better, the water level prediction precision of the model is improved, finally, a test set is combined for carrying out model inspection, errors between an obtained actual value and a calculated value are compared and analyzed, and the good performance of the model is verified.
Owner:NANJING UNIV OF TECH
Systems And Methods For Localization
ActiveUS20160183050A1Particular environment based servicesPosition fixationUser deviceLocalization system
Systems and methods for a localization system are provided. In one aspect, a RF signature map for a geographical area is determined using a Gaussian Process (“GP”) model. Training RF measurements are taken at some locations within the area to train the GP using the Firefly Algorithm (“FA”). The RF measurements for other locations of the area are predicted using the conditional probabilities of the trained GP and without taking RF measurements at those other locations. The RF signature map is used for fingerprinting localization. In one aspect, a reference RF signature map is constructed for one, some, or all access points (“APs”) covering the area. A location of a user device, such as, for example, a smart phone, is then estimated by comparing the RF signals received by the user device from one or more APs with the determined one or more reference RF signature maps using a combined likelihood function.
Owner:ALCATEL-LUCENT USA INC
Optical fiber state prediction method for optimizing neural network based on improved firefly algorithm
ActiveCN106529701AFast calculation convergence speedOvercome blindnessForecastingArtificial lifeLocal optimumState prediction
The invention discloses an optical fiber state prediction method for optimizing a neural network based on an improved firefly algorithm, relates to the technical field of optical fiber line state prediction, and solves problems that the prior art cannot achieve the analysis and prediction of the tendency of the state of a line, and cannot avoid the possible faults. The method carries out the optimization of parameters in an Elman neural network prediction model through employing the improved firefly algorithm, accurately predicts the future state tendency of the line, predicts the possible faults of the line, forms a maintenance strategy in advance, avoids the faults, and meets the requirements of uninterrupted transmission of optical fiber communication. The method carries out the optimization of parameters of the Elman neural network prediction model through employing the improved firefly algorithm, enables the model to have good prediction precision and stability, solves a problem that a conventional Elman neural network is liable to be caught in conditions of local optimization and slow convergence speed, and achieves the better prediction of the state of light.
Owner:国网吉林省电力有限公司信息通信公司 +1
Transformer fault diagnostic method based on gray fuzzy firefly algorithm optimization
ActiveCN103698627APredict Latent FailuresGeneration of monitoringTesting dielectric strengthBiological neural network modelsAlgorithmTransformer
The invention discloses a transformer fault diagnostic method based on gray fuzzy firefly algorithm optimization. The method comprises the following steps: effective data sequences of the contents of five characteristic gases of a transformer are selected through a characteristic gas content prediction module, and the characteristic gas predictive values at a time under the independent variable sequences of the five characteristic gases are obtained through a univariate time sequence gray model; pretreatment is performed on data; characteristic gas coding sequences are used as inputs of training samples, and transformer fault types corresponding to the inputs are used as outputs to built an IGSO-LM network, and the weight value and the threshold value of the LM network are optimized through an IGSO algorithm; the network is trained by using pretreated data of the characteristic gases of the transformer, so as to obtain an optimal nerve net weight value and the threshold value to built a transformer fault diagnostic model and judge the transformer fault types. The transformer fault diagnostic method provided by the invention solves the problems of data source shortage of transformer fault gases and low result accuracy in a conventional analysis method.
Owner:西安金源电气股份有限公司
Inverter control method based on fractional order PID discrete sliding mode variable structure
ActiveCN107248822AImprove chattering problemImprove tracking accuracyAc-dc conversionFirefly algorithmControl parameters
The invention discloses an inverter control method based on a fractional order PID discrete sliding mode variable structure, applied to a high-order voltage type inverter system for providing a novel efficient control strategy. In the high-order voltage type inverter system, a fractional order PID control and sliding mode variable structure control method is combined to improve an inherent buffeting problem of sliding mode control; meanwhile, a firefly algorithm is used for optimally setting a control parameter, so that excellent effect of the control method is ensure to a certain extent, and the system has the characteristic of intelligence. The control method provided by the invention has the advantages of being high in control accuracy, fast in tracking speed, good in robustness and insensitive to external interference, and can ensure dynamic performance and steady-state performance of the inverter system.
Owner:上海劭能新能源科技有限公司
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