Abstract

Two algorithms for restoring of missing values of time series with using of adaptive moving two-sided exponential smoothing method with different initial conditions are developed in the article. Adaptive moving two–sided exponential smoothing method for restoring of true regularities and forecasting of time series is developed. The integral criterion of model adequacy and the proximity criterion for using for restoring of the true regularities of time series evolution are suggested. Practical researches with restoring of true regularities of Wolf numbers and solar radio fluxes at a wavelength of 10.7 cm, restoring of missing values and forecasting of solar radio fluxes at a wavelength of 10.7 cm are performed. Comparisons of created method with traditional methods are performed for all experiments. Developed adaptive moving two-sided exponential smoothing method is shown superiority in comparison with all traditional methods in the restoring of true regularities, missing values and forecasting of solar data.

Highlights

  • An urgent modern task of data processing is analysis, mathematical modeling and forecasting of nonlinear non-stationary processes, in particular data, which describes solar cycles

  • An integral criterion is proposed for estimation of adequacy of constructed models when restoring of true regularities of time series is performed

  • The proximity criterion is proposed to evaluate the efficiency of restoring the true regularities of time series

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Summary

Introduction

An urgent modern task of data processing is analysis, mathematical modeling and forecasting of nonlinear non-stationary processes, in particular data, which describes solar cycles. One of the well-known works, in which the model of the 11-year solar cycle is described, is the work of Hathaway and others [1] These authors in a later work [2] proposed the method for calculating of 13-month moving average for processing of solar activity data. Researches regarding the dynamics of the solar cycle are performed in the works [3,4,5]. The mathematical model for the Wolf number cycle using the Ian Wilson’s Tidal Torque theory is proposed by Salvador in the work [15]

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