issue 1 publication date 2020-01-01

• A New Approach for Solving Fully Fuzzy Bilevel Linear Programming Problems
• Defuzzification Method for Solving ‎Fuzzy ‎Linear Programming Problems
• Local Annihilation Method ‎and‎ Some Stiff ‎Problems
• Identification and ‎R‎anking Effective Factors in Increasing Personnel Satisfaction with Intuitionistic Fuzzy Data in Steel and Rolling Unit of Saba (Mobarakeh Steel ‎Company)
• A Hybrid DEA Based CHAID and Imperialist Competitive Algorithm for Stock ‎Selection
• Solving a Joint Availability-Redundancy Optimization Model with Multi-State Components with Meta-Heuristic
• Computing the Matrix Geometric Mean of Two HPD Matrices: A Stable Iterative Method
• Performance Measurement ‎T‎echniques In the Presence of Undesirable Products
• Window Network Data Envelopment Analysis: An Application to Investment Companies