@article{onlinereinforcementlearningcontrolby,
  title = {Online Reinforcement Learning Control by Direct Heuristic Dynamic Programming: from Time-Driven to Event-Driven},
  author = {Qingtao Zhao and Jennie Si and Jian Sun},
  year = {2020},
  eprint = {2006.08938},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2006.08938v1},
}