Presented to

[نام نویسنده را انتخاب نمایید]

This is to certify that your paper entitled «Maximizing First Natural Frequency Of ۲D Structures Using Bee Colony Optimization (BCO) and fuzzy logic» was indexed with 8 pages, in the CIVILICA citation database, code COI:JR_ADMTL-6-3_010, after evaluation and approval of the referees of the "International Journal of Advanced Design and Manufacturing Technology Vol 6, Issue 3 , Year 2021.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above journal and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.