Monthly runoff simulation method based on D-vine copula function

The invention provides a monthly runoff simulation method based on a D-vine copula function. The method includes: adopting a graphical method to construct a monthly runoff density distribution function fitting model; using a mixed D-vine copula function to construct a monthly runoff dependent struct...

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Bibliographische Detailangaben
Hauptverfasser:	DONG ZENGCHUAN, WANG WENZHUO, HU QILING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES PHYSICS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention provides a monthly runoff simulation method based on a D-vine copula function. The method includes: adopting a graphical method to construct a monthly runoff density distribution function fitting model; using a mixed D-vine copula function to construct a monthly runoff dependent structure simulation model of each month; adopting the Kendall coefficient based correlation test method to determine the mixed D-vine copula dimension of each monthly runoff; using the order method based on the maximum likelihood method and the AIC method to derive D-vine copula parameters; and using a conditional function to construct a monthly runoff stimulation model based on a conditional mixed D-vine copula joint distribution function. The invention constructs the monthly runoff simulation modelbased on the mixed D-vine copula. The model constructs the relevant structure of each month according to Kendall's tau values; if the confidence value is more than 95%, correlation is determined; andthe mixed D-vine copula i