Type-2 fuzzy functional inference method: Design and properties

Author(s):  
Hirosato Seki ◽  
Masaharu Mizumoto
2015 ◽  
Vol 16 (1) ◽  
pp. 51 ◽  
Author(s):  
Rosana Motta Jafelice ◽  
Ana Maria Bertone ◽  
Rodney Carlos Bassanezi

<span style="color: #000000;"> This study presents the </span><span style="color: #000000;">Verhulst's</span><span style="color: #000000;"> model for the analysis of population growth with the rate of </span><span style="color: #000000;">reproductivity</span><span style="color: #000000;"> depending on the fertility rate and the country economic development. These linguistic variables are defined through Fuzzy Rule-Based Systems (</span><span style="color: #000000;">FRBS</span><span style="color: #000000;">). The analysis is made for </span><span style="color: #000000;">FRBS</span><span style="color: #000000;"> types 1 and 2 where in the first case, the inference method used is </span><span style="color: #000000;">Mamdani's</span><span style="color: #000000;"> and the </span><span style="color: #000000;">defuzzification</span><span style="color: #000000;"> is the center of gravity. For type 2 </span><span style="color: #000000;">FRBS</span><span style="color: #000000;"> is used the inference method by </span><span style="color: #000000;">Karnik</span><span style="color: #000000;"> Mendel (KM) where the output is </span><span style="color: #000000;">defuzzificated</span><span style="color: #000000;"> by the </span><span style="color: #000000;"> Type Reducer method. A comparative study of the solutions of the </span><span style="color: #000000;">Verhulst's</span><span style="color: #000000;"> model for both techniques is performed. I has been noticed that the region determined by the solutions corresponding to the minimum and maximum rate resulting from </span><span style="color: #000000;">FRBS</span><span style="color: #000000;"> type 2 is contained in the region built similarly from type 1, showing a higher accuracy in the response.</span>


2001 ◽  
Vol 120 (5) ◽  
pp. A314-A314
Author(s):  
K HADERSLEV ◽  
P JEPPESEN ◽  
B HARTMANN ◽  
J THULESEN ◽  
J GRAFF ◽  
...  

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