Improved yellowness index (YI) control in ABS compounding process through virtual control using an RNN-based neural network soft-sensor model. - Shih-Jie Pan; Kun-Chuan Lee; Meng-Lin Tsai; Cheng-Liang Chen; Heng-Shan Kao; Jeffrey D. Ward; I-Lung Chien; Hao-Yeh Lee (Comput. Chem. Eng., 2023)