Mathematical Modeling and Optimization of Downdraft Gasifiers Using Artificial Neural Networks (ANN) and Stochastic Programming Techniques. - Umer Asgher; José Arzola-Ruiz; E. R. Gutiérrez-Gualotuña; Yasar Ayaz; Muhammad Sajid 002; Khurram Khalil; Sara Ali (AHFE (1), 2020)