List of Articles hasan masoumi Article 1 - Sleep stages classification based on deep transfer learning method using PPG signal 20.1001.1.25887327.2021.5.2.4.5 Mohammad Moradi Mohammad Fatehi Hassan Masoumi Mehdi Taghizadeh Signal Processing and Renewable Energy , Issue 2 , Year , Spring 2021 Article 2 - Deep Learning Method for Sleep Stages Classification by Time-Frequency Image 20.1001.1.25887327.2021.5.3.5.8 Mohammad Moradi Mohammad Fatehi Hassan Masoumi Mehdi Taghizadeh Signal Processing and Renewable Energy , Issue 4 , Year , Summer 2021 Article 3 - Brain Tumor Detection Using Deep Transfer Learning Method 20.1001.1.25887327.2021.5.3.3.6 Alireza Fazelnia Hassan Masoumi Mohammad Fatehi Jasem Jamali Signal Processing and Renewable Energy , Issue 4 , Year , Summer 2021