scholarly journals Which Algorithms Are Feasible and Which Are Not: Fuzzy Techniques Can Help in Formalizing the Notion of Feasibility

Author(s):  
Olga Kosheleva ◽  
Vladik Kreinovich
Keyword(s):  
1996 ◽  
Vol 35 (04/05) ◽  
pp. 334-342 ◽  
Author(s):  
K.-P. Adlassnig ◽  
G. Kolarz ◽  
H. Leitich

Abstract:In 1987, the American Rheumatism Association issued a set of criteria for the classification of rheumatoid arthritis (RA) to provide a uniform definition of RA patients. Fuzzy set theory and fuzzy logic were used to transform this set of criteria into a diagnostic tool that offers diagnoses at different levels of confidence: a definite level, which was consistent with the original criteria definition, as well as several possible and superdefinite levels. Two fuzzy models and a reference model which provided results at a definite level only were applied to 292 clinical cases from a hospital for rheumatic diseases. At the definite level, all models yielded a sensitivity rate of 72.6% and a specificity rate of 87.0%. Sensitivity and specificity rates at the possible levels ranged from 73.3% to 85.6% and from 83.6% to 87.0%. At the superdefinite levels, sensitivity rates ranged from 39.0% to 63.7% and specificity rates from 90.4% to 95.2%. Fuzzy techniques were helpful to add flexibility to preexisting diagnostic criteria in order to obtain diagnoses at the desired level of confidence.


2018 ◽  
Vol 5 (2) ◽  
pp. 8454-8463 ◽  
Author(s):  
N. Harsha ◽  
I. Ajit Kumar ◽  
K. Sita Rama Raju ◽  
S. Rajesh

Author(s):  
Anastasios Katsoukis ◽  
Lazaros Iliadis ◽  
Avrilia Konguetsof ◽  
Basil Papadopoulos

Author(s):  
Vladik Kreinovich ◽  
Jonathan Quijas ◽  
Esthela Gallardo ◽  
Caio De Sa Lopes ◽  
Olga Kosheleva ◽  
...  

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