김상욱 Kim Se Yun 2024-01-13T18:33:14Z 2024-01-13T18:33:14Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/110094 English wavelet Wavelet analysis of the signal patterns received by cross-borehole pulse radar for detection of underground tunnel Conference 1 Proc. GPR '98, pp.25 - 28 Proc. GPR '98 25 28 US