@article{pdsovnetaphysicsdrivensecondordervibrati,
  title = {PD-SOVNet: A Physics-Driven Second-Order Vibration Operator Network for Estimating Wheel Polygonal Roughness from Axle-Box Vibrations},
  author = {Xiancheng Wang and Lin Wang and Rui Wang and Zhibo Zhang and Minghang Zhao and Xiaoheng Zhang and Zhongyue Tan and Kaitai Mao},
  year = {2026},
  eprint = {2604.06620},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.06620},
}