Recurrent Neural Networks with Mixed Hierarchical Structures and EM Algorithm for Natural Language Processing Zhaoxin Luo author Michael Zhu author 2022-06 text Proceedings of the Thirteenth Language Resources and Evaluation Conference Nicoletta Calzolari editor Frédéric Béchet editor Philippe Blache editor Khalid Choukri editor Christopher Cieri editor Thierry Declerck editor Sara Goggi editor Hitoshi Isahara editor Bente Maegaard editor Joseph Mariani editor Hélène Mazo editor Jan Odijk editor Stelios Piperidis editor European Language Resources Association Marseille, France conference publication luo-zhu-2022-recurrent https://aclanthology.org/2022.lrec-1.656/ 2022-06 6104 6113