Journal
INFORMATION SCIENCES
Volume 391, Issue -, Pages 65-79Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2016.11.004
Keywords
Fuzzy logical relationships; Fuzzy sets; Fuzzy time series; Two-factors second-order fuzzy-trend; logical relationship groups; Particle swarm optimization; Probabilities of trends; Similarity measures
Categories
Funding
- Ministry of Science and Technology, Republic of China [MOST 104-2221-E-011-084-MY3]
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In this paper, we propose a new fuzzy forecasting method based on two-factors second order fuzzy-trend logical relationship groups (TSFTLRGs), particle swarm optimization (PSO) techniques and similarity measures between the subscripts of fuzzy sets (FSs) for forecasting the Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX) and the New Taiwan Dollar/US Dollar (NTD/USD) exchange rates. First, we propose a PSO-based optimal-intervals partition algorithm to get the optimal partition of the intervals in the universe of discourse (UOD) of the main factor TAIEX and to get the optimal partition of the intervals in the UOD of the secondary factor SF, where SF is an element of{Dow Jones, NASDAQ M1B}. Based on the proposed PSO-based optimal-intervals partition algorithm, the constructed TSFTLRGs, and similarity measures between the subscripts of FSs, we propose a new method for forecasting the TAIEX and the NTD/USD exchange rates. The main contribution of this paper is that we propose a new fuzzy forecasting method based on TSFTLRGs, PSO techniques and similarity measures between the subscripts of FSs for forecasting the TAIEX and the NTD/USD exchange rates to get higher forecasting accuracy rates than the ones of the existing fuzzy forecasting methods. (C) 2016 Elsevier Inc. All rights reserved.
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