Parameter estimation in uncertain differential equations
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Parameter estimation is a critical problem in the wide applications of uncertain differential equations. The method of moments is employed for the first time as an approach for estimating the parameters in uncertain differential equations. Based on the difference form of an uncertain differential equation, a function of the parameters is proved to follow a standard normal uncertainty distribution. Setting the empirical moments of the functions of the parameters and the observed data equal to the moments of the standard normal uncertainty distribution, a system of equations about the parameters is obtained whose solutions are the estimates of the parameters. Analytic examples and numerical examples are given to illustrate the proposed method of moments.
KeywordsUncertain differential equation Method of moments Uncertainty theory Parameter estimation
This work was supported by National Natural Science Foundation of China (Grant No. 61873329), and the University of Chinese Academy of Sciences.
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