2 papers
cs.CL2026
A Comparative Evaluation of Structural Topic Models and BERTopic for Short, Open-Ended Survey Responses
Yan Jiang, Sihong Liu, Philip A. Fisher
Topic modeling in applied psychology increasingly spans two methodological traditions: probabilistic bag-of-words models and newer embedding-based approaches. Yet many evaluations…
physics.acc-ph2026
High Harmonic Radiation from a Low-K Biharmonic Planar Undulator
Sihong Liu, Bocheng Jiang
High harmonic generation by an undulator is a key issue for extending the photon energy range of synchrotron light sources. In this work, we propose a biharmonic planar undulator o…