List of Articles "الگوریتمهای فرا ابتکاری چند هدفه" Open Access Article Abstract Page Full-Text 1 - Stock portfolio optimization of companies listed on the Tehran Stock Exchange based on a combination of two-level ensemble machine learning methods and multi-objective meta-innovative algorithms based on market timing approach sanaz faridi amir daneshvar Mahdi Madanchi Zaj Shadi Shahverdiani