Kuo H.P.Chen Y.W.HSIU-PO KUO2020-02-272020-02-27200809218831https://www.scopus.com/inward/record.uri?eid=2-s2.0-40149087618&doi=10.1163%2f156855208X291738&partnerID=40&md5=a0d2d3d0a365be083edc340ae8c92779https://scholars.lib.ntu.edu.tw/handle/123456789/466663Determination of state transition of granular materials in a vibrating bed using a novel optical signal analyzing methodjournal article10.1163/156855208X2917382-s2.0-40149087618