Title:
PRECIPITATION NORMALIZATION ANALYSIS METHOD AND SYSTEM BASED ON GRADIENT PARAMETER OPTIMIZATION
Document Type and Number:
WIPO Patent Application WO/2024/036516
Kind Code:
A1
Abstract:
A precipitation normalization analysis method and system based on gradient parameter optimization. The method comprises the following steps: acquiring precipitation data to be analyzed (S1); constructing a normal transformation model, and performing normal transformation on the precipitation data to obtain a normal variable Z (S2); enabling the normal variable Z to follow a normal distribution, and constructing a joint probability density function of the normal variable Z (S3); constructing a likelihood function for parameter optimization on the basis of the normal transformation model and the joint probability density function (S4); deriving an analytic gradient vector of the likelihood function to optimize the likelihood function until a preset termination condition is met, so as to obtain an optimal parameter which enables the likelihood function to take a maximum value (S5); and updating the normal transformation model on the basis of the optimal parameter, and performing normal transformation and modeling analysis on the precipitation data to obtain a precipitation normalization analysis result (S6).
Inventors:
ZHAO TONGTIEGANG (CN)
HUANG ZEQING (CN)
CHEN XIAOHONG (CN)
HUANG ZEQING (CN)
CHEN XIAOHONG (CN)
Application Number:
PCT/CN2022/113078
Publication Date:
February 22, 2024
Filing Date:
August 17, 2022
Export Citation:
Assignee:
UNIV SUN YAT SEN (CN)
International Classes:
G06F17/00
Foreign References:
| CN109871584A | 2019-06-11 | |||
| CN107918166A | 2018-04-17 | |||
| CN111126699A | 2020-05-08 | |||
| CN112612995A | 2021-04-06 | |||
| CN113095579A | 2021-07-09 | |||
| US20050197774A1 | 2005-09-08 |
Other References:
CUI MEI-YI, ZHANG YU-HU;, HEN QIU-HUA: "Box-Cox Normal Distribution and Its Application in Rainfall Extreme Value", JOURNAL OF APPLIED STATISTICS AND MANAGEMENT., vol. 36, no. 1, 1 January 2017 (2017-01-01), pages 8 - 17, XP093140321, DOI: 10.13860/j.cnki.sltj.20160621-001
Attorney, Agent or Firm:
YOGO PATENT AND TRADEMARK AGENCY LIMITED COMPANY (CN)
Download PDF: