Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Distrital Francisco José de Caldas
2016
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=498853953003 https://www.redalyc.org/journal/4988/498853953003/ https://www.redalyc.org/journal/4988/498853953003/html/ https://www.redalyc.org/journal/4988/498853953003/498853953003.epub https://www.redalyc.org/journal/4988/498853953003/movil |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- Nie-Tan Method and its Improved Version: A Counterexample Juan D. Rojas Omar Salazar Humberto Serrano Ingeniería Nie Type type reduction Tan method Context: The bottleneck on interval type-2 fuzzy logic systems is the output processing when using Centroid Type-Reduction + Defuzzification (CTR+D method). Nie and Tan proposed an approximation to CTR+D (NT method). Recently, Mendel and Liu improved the NT method (INT method). Numerical examples (due to Mendel and Liu) exhibit the NT and INT methods as good approximations to CTR+D. Method: Normalization to the unit interval of membership function domains (examples and counterexample) and variables involved in the calculations for the three methods. Examples (due to Mendel and Liu) taken from the literature. Counterexample with piecewise linear membership functions. Comparison by means of error and percentage relative error. Results: NT vs. CTR+D: Our counterexample showed an error of 0 : 1014 and a percentage relative error of 30 : 53% . This is respectively 23 and 32 times higher than the worst case obtained in the examples. INT vs. CTR+D: Our counterexample showed an error of 0 : 0725 and a percentage relative error of 21 : 83% . This is respectively 363 and 546 times higher than the worst case obtained in the examples. Conclusions: NT and INT methods are not necessarily good approximations to the CTR+D method. 2016 artículo científico 0121-750X https://www.redalyc.org/articulo.oa?id=498853953003 https://www.redalyc.org/journal/4988/498853953003/ https://www.redalyc.org/journal/4988/498853953003/html/ https://www.redalyc.org/journal/4988/498853953003/498853953003.epub https://www.redalyc.org/journal/4988/498853953003/movil en http://www.redalyc.org/revista.oa?id=4988 Ingeniería application/pdf Universidad Distrital Francisco José de Caldas Ingeniería (Colombia) Num.2 Vol.21