N value estimation method for hydraulic excavator in real time by using logistic regression model. - Hirotaka Tani; Soichiro Hayakawa; Ryojun Ikeura; Takeshi Ooi; Takuma Nakamura (ROBIO, 2017)

Spatio-temporal prediction of soil deformation in bucket excavation using machine learning. - Yuki Saku; Masanori Aizawa; Takeshi Ooi; Genya Ishigami (Adv. Robotics, 2021)