Vibration-based monitoring of agro-industrial machinery using a k-Nearest Neighbors (kNN) classifier with a Harmony Search (HS) frequency selector algorithm. - Francisco Javier Gomez-Gil; Víctor Martínez-Martínez; Ruben Ruiz-Gonzalez; Lidia Martínez-Martínez; Jaime Gómez Gil (Comput. Electron. Agric., 2024)