TY - RPRT TI - Approximate entropy analysis for nonlinear beam dynamics AU - Li, Yongjun (ORCID:0000000152270588) AU - Rainer, Robert PY - 2024 DO - 10.1103/physrevaccelbeams.27.011601 UR - https://www.osti.gov/biblio/2281043 ID - 2281043 ER -