| Author(s): |
Jafelice, Rosana M.
;
Barros, Laecio C.
;
Bassanezi, Rodney C.
;
Carvalho, JP
;
Kaymak, DU
;
Sousa, JMC
Total Authors: 6
|
| Document type: | Journal article |
| Source: | PROCEEDINGS OF THE JOINT 2009 INTERNATIONAL FUZZY SYSTEMS ASSOCIATION WORLD CONGRESS AND 2009 EUROPEAN SOCIETY OF FUZZY LOGIC AND TECHNOLOGY CONFERENCE; v. N/A, p. 6-pg., 2009-01-01. |
| Abstract | |
This paper presents a process to obtain the solution (or flux) of a fuzzy delay system and to determine the fuzzy expected curve for the HIV (human immunodeficiency virus) when HIV-positive individuals receive antiretroviral therapy. This delay is defined as the time between the infection of a CD4+ type T-lymphocyte cell by the virus and the production of new virus particles. The intracellular delay is represented by an uncertainty parameter that depends on the individual characteristics of HIV-positive patients. A fuzzy rule-based system is used to model this parameter. The solution of the system of delay differential equations, which is a fuzzy process, is obtained from Zadeh's Extension Principle. Lastly, for each instant t, we calculate the fuzzy expected value obtained by the Center of Gravity. (AU) | |
| FAPESP's process: | 06/05920-7 - Estimability of association and effect measures in spatial case-control studies |
| Grantee: | Laécio Carvalho de Barros |
| Support Opportunities: | Research Projects - Thematic Grants |