00724naa#a2200169#i#450# EN\\bibl\119597 20260408080417.3 2223-9987 20260403b2026####ek#y0engy0150####ca RU Multiple-Class Classification of a Diesel Locomotive Engine’s Mechanical Condition Based on Wavelet Properties of Vibration Signals via Machine-Learning Techniques Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 11 с. Journal article local Испытания - методика и оборудование. 629.4.018 Belyaev Andrey Aleksandrovich itt-pgups.ru