著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Taisuke Kobayashi,Proximal policy optimization with adaptive threshold for symmetric relative density ratio,Results in Control and Optimization,2666-7207,Elsevier BV,2023-03,10,,100192,https://cir.nii.ac.jp/crid/1360580230600084480,https://doi.org/10.1016/j.rico.2022.100192