فهرست مقالات mixed integer nonlinear programming دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - A Hybrid Meta-Heuristic Method to Optimize Bi-Objective Single Period Newsboy Problem with Fuzzy Cost and Incremental Discount Ata Allah Taleizadeh Seyed Taghi Akhavan Niaki