A modified genetic algorithm for forecasting fuzzy time series

BAŞ E., Uslu V. R., Yolcu U., Egrioglu E.

APPLIED INTELLIGENCE, vol.41, no.2, pp.453-463, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 2
  • Publication Date: 2014
  • Doi Number: 10.1007/s10489-014-0529-x
  • Journal Name: APPLIED INTELLIGENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.453-463
  • Keywords: Genetic algorithm, Forecasting, Fuzzy time series, Mutation operator, NEURAL-NETWORKS, ADAPTIVE EXPECTATION, ENROLLMENTS, MODEL, INTERVALS, OPTIMIZATION, PREDICTION, LENGTHS, LOGIC
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Fuzzy time series approaches are used when observations of time series contain uncertainty. Moreover, these approaches do not require the assumptions needed for traditional time series approaches. Generally, fuzzy time series methods consist of three stages, namely, fuzzification, determination of fuzzy relations, and defuzzification. Artificial intelligence algorithms are frequently used in these stages with genetic algorithms being the most popular of these algorithms owing to their rich operators and good performance. However, the mutation operator of a GA may cause some negative results in the solution set. Thus, we propose a modified genetic algorithm to find optimal interval lengths and control the effects of the mutation operator. The results of applying our new approach to real datasets show superior forecasting performance when compared with those obtained by other techniques.