KMS Chongqing Institute of Green and Intelligent Technology, CAS
Research on the Response Characteristics and Identification of Infrasound Signals in the Jialongcuo Ice Avalanche, Tibet | |
Zhang, Yifang1; Chen, Qiao1; Su, Pengcheng2; Liu, Dunlong3; Cui, Jianzhao4; Chen, Jilong1; Ma, Jianrong1; Xing, Qiao5; Xu, Fenglin6; Fan, Yuanchao7 | |
2023-09-01 | |
摘要 | Due to the inability of remote sensing satellites to monitor avalanches in real time, this study focuses on the glaciers in the rear edge of Jialongcuo, Tibet, and uses infrasound sensors to conduct real-time monitoring of ice avalanches. The following conclusions are drawn: (1) In terms of waveform, compared to background noise, ice avalanche events have a slight left deviation and a slightly steep shape; compared to wind, rain, and floods events, ice avalanche events have less obvious kurtosis and skewness. (2) In terms of frequency distribution, the infrasound frequency generated by ice avalanche events is mainly distributed in the range of 1.5 Hz to 9.5 Hz; compared to other events, ice avalanche events differ some in frequency characteristics. (3) The model based on information entropy and marginal spectral frequency distribution characteristics of infrasound have higher accuracy in signal classification and recognition, as they can better represent the differences between infrasound signals of different events than other features. (4) Compared with the K-nearest neighbor algorithm and classification tree algorithm, the support vector machine and BP (Back Propagation) neural network algorithm are more suitable for identifying infrasound signals in the Jialongcuo ice avalanche. The research results can provide theoretical support for the application of infrasound-based ice avalanche monitoring technology. |
关键词 | ice avalanche ice lake collapse infrasound signal feature extraction classified recognition |
DOI | 10.3390/rs15184482 |
发表期刊 | REMOTE SENSING |
卷号 | 15期号:18页码:25 |
通讯作者 | Chen, Qiao(chenqiao@cigit.ac.cn) |
收录类别 | SCI |
WOS记录号 | WOS:001074531300001 |
语种 | 英语 |