Optimizing a Fuzzy Green p-hub Centre Problem Using Opposition Biogeography Based Optimization
Hub networks have always been acriticalissue in locating health facilities.Recently, a study has been investigated by Cocking et al.(2006)in Nouna health district in Burkina Faso, Africa, with a population of approximately 275,000 people living in 290 villages served by 23 health facilities.The travel times of the population to health services beco