Exploiting the Feature Space Structures of KNN and OPF Algorithms for Identification of Incipient Faults in Power Transformers. - André Gifalli; Marco Akio Ikeshoji; Danilo Sinkiti Gastaldello; Victor Hideki Saito Yamaguchi; Welson Bassi; Talita Mazon; Floriano Torres Neto; Pedro da Costa da Costa Junior; André Nunes de Souza (Mach. Learn. Knowl. Extr., 2025)