فهرس المقالات Grey Model حرية الوصول المقاله صفحة الملخص نص كامل 1 - Measurement of Bitcoin Daily and Monthly Price Prediction Error Using Grey Model, Back Propagation Artificial Neural Network and Integrated model of Grey Neural Network Mahdi Madanchi Zaj Mohammad Ebrahim Samavi Emad Koosha 10.22034/amfa.2020.1881110.1315 حرية الوصول المقاله صفحة الملخص نص كامل 2 - Forecast of climatologically events using improved grey model (Case Study: Qazvin Province Climatology) Maryam Karimi Khajehghiasi Alireza Alinezhad