PLC Commanded Intelligent Logistics Model Based on Discrete Event Systems - Elvis Dogaru; Flaviu-Mihai Frigura-Iliasa; Mirela Iorga; Lia Dolga; Hannelore Filipescu; Mihaela Frigura-Iliasa (4th International Conference on Intelligent Transportation Engineering, ICITE 2019, Singapore, September 5-7, 2019, 2019)