Institute of Space Science - INFLPR Subsidiary

Fractional Euler-Lagrange modeling of a pendulum with a vertically vibrating pivot

This study develops classical and fractional variational models for a simple pendulum whose pivot undergoes prescribed vertical harmonic motion. The nonlinear classical equation of motion and its small-angle, Mathieu-type reduction are first derived from the Euler-Lagrange equati...

Two Earliest Optical-UV Tidal Disruption Events Hidden in the SDSS DR7 Catalog Unveiled by the Transformer-based Spectrum Classifier

Abstract Optical spectroscopic features are decisive in the current identification of optical-UV tidal disruption events (TDEs). Regarding that the TDE estimated occurrence rate is 10 −5 –10 −4 galaxy −1 yr −1 by both theoretical and observational methods, large optical spectrosc...