فهرس المقالات Ride quality حرية الوصول المقاله صفحة الملخص نص كامل 1 - Evaluation of Sperling’s Index in Passenger and Freight Trains Under Different Speeds and Track Irregularities sajjad sattari Mohammad Saadat Sayed Hasan Mirtalaie mahdi salehi ali soleimani 10.30486/admt.2023.1963242.1367