To guide the operation and maintenance (O&M) of the urban rail transit vehicles precisely. it is necessary to collect the latest vehicle status data and predict the development trend. Therefore. it is essential to conduct data mining and analysis for the real-time operation data and the historical O&M data of the vehicles in the same time and space. https://uhmrdrqy1fgjvw.timeblog.net/70682978/the-impact-of-inflation-rates-and-us-dollar-exchange-rates-on-indonesian-stock-market-index-return-volatility