In recent years, great efforts have been made to reduce greenhouse gas emissions by vehicles. Petroleum products produces greenhouse gas emissions, therefore reducing the use of these products can make a major contribution to reducing pollution. The Fleet Size and Mix Vehicle Routing Problem is one of the most widely used routing branches. In this problem, there are vehicle with different capac...

human t-ceil lymphotropic virus, type 1 (htl v-i) is considered to be the causative agent of adult t-cell lymphoma/leukemia and spastic paralysis, and seems to be common in khorasan province. 300 blood samples from mashhadi and 180 from gonbadi blood donors were obtained (all samples from healthy subjects). serological screening was done by passive particje- agglutination test and confirmed by ...

The control problem and Dynamic programming is a powerful tool in economics and management. We review the dynamic programming problem from its beginning up to its present stages. A problem which was involved in physics and mathematics in I 7” century led to a branch of mathematics called calculus of variation which was used in economic, and management at the end of the first quarter of the 20” ...