Feasibility Study of Using X-ray Tube and GMDH for Measuring Volume Fractions of Annular and Stratified Regimes in Three-Phase Flows oleh Gholam Hossein Roshani, Peshawa Jammal Muhammad Ali, Shivan Mohammed, Robert Hanus, Lokman Abdulkareem, Adnan Alhathal Alanezi, Ehsan Nazemi, Ehsan Eftekhari-Zadeh, El Mostafa Kalmoun