Overview: .The two-volume set LNAI 12319 and 12320 constitutes the proceedings of the 9th Brazilian Conference on Intelligent Systems, BRACIS 2020, held in Rio Grande, Brazil, in October 2020...The total of 90 papers presented in these two volumes was carefully reviewed and selected from 228 submissions...The contributions are organized in the following topical section: ..Part I: Evolutionary computation, metaheuristics, constrains and search, combinatorial and numerical optimization; neural networks, deep learning and computer vision; and text mining and natural language processing...Part II:
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