海量图书期刊资源,随时随地畅享阅读乐趣
Speckle Noise Reduction by Superposing Many Higher Harmonic ImagesAkiyama, Iwaki; Ohya, Akihisa; Saito, Shigemi · Japanese Journal of Applied Physics · 2005
Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequenciesNatsuki Yoshizumi; Shigemi Saito; Daisuke Koyama; Kentaro Nakamura; Akihisa Ohya; Iwaki Akiyama · 2009