 Prof. Jixing Qin, Institute of Acoustics, Chinese Academy of Sciences
Personal profile: Jixing Qin, Professor in the Institute of Acoustics, Chinese Academy of Sciences, Associate Director of the State Key Laboratory of Acoustics. He received the B. S. degree from Harbin Engineering University in 2009 and the Ph. D. degree from the University of Chinese Academy of Sciences in 2014. From 2015 to 2016, he was a Post-Doctoral Fellow in the University of Haifa, Israel. He is the Chief Scientist of a major project, and a member in the Youth Innovation Promotion Association of the Chinese Academy of Sciences.
His research interests include ocean acoustics, with special emphasis on wave propagation theory (2D and 3D), ocean ambient noise, internal wave, acoustic tomography and geoacoustic inversion. He published over 80 papers, and published one book as a coauthor. He accomplished more than 10 research projects supported by National Natural Science Foundation of China, Chinese Academy of Sciences, and other national departments.
Presentation title: Effect of sound speed profile on the long-range acoustic pulse
Abstract: Using the deep-water sound propagation data from the experiments respectively conducted in the East Indian Ocean (EIO) and the South China Sea (SCS), long-range transmission loss and time arrival structure of acoustic pulses for different sound speed profiles (SSPs) are compared. In the EIO environment, sound energy transmitting along the sound channel axis (SCA) is relatively large, and the corresponding signals arrive first, whereas signals propagating off the SCA arrive late. In the full receiving depth, it shows a branch structure where the waveform near the SCA arrives earlier than other depths, which is totally different with the characteristics of the sound pulse in the SCS. Combined with the parametric mathematical model of deep-water sound channel, the influence mechanism of SSP on the time arrival structure of long-range pulse propagation is theoretically analyzed.
|