Study on the Method of Identifying Ultrafine Bubbles Using Ultrasound under the Presence of Solid NanoparticlesNaoya Yamawaki, Hayato Okumura, Shigenori Akamatsu, Yusuke Nishiuchi and Takashi HataMATEC Web Conf., 333 (2021) 01001DOI: https://doi.org/10.1051/matecconf/202133301001