@article{CTT100546417, author = {Kentaro Kasuga and Hiroyuki Hachiya and Takeo Kinosita}, title = {Quantitative Estimation of the Ultrasound Transmission Characteristics for River Flow Measurement during a Flood}, journal = {Jpn. J. Appl. Phys.}, year = 2003, } @article{CTT100546418, author = {蜂屋弘之 and 王勇 and 木下武雄}, title = {河川の音波伝搬特性の長期連続観測 -超音波流速計の洪水観測への応用-}, journal = {海洋音響学会誌}, year = 2001, } @inproceedings{CTT100590224, author = {蜂屋弘之 and 春日健太郎 and 木下武雄}, title = {河川における音波伝搬の変動要因の検討 : 超音波流速計の洪水観測への応用}, booktitle = {信学技報}, year = 2001, }