Study on the Thick-Walled Pipe Ultrasonic Signal Enhancement of Modified S-Transform and Singular Value Decomposition

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Evaluation indicators</td><td align="center" colspan="3">
                  The indicator value after denoising at different noise levels</td></tr><tr class="thead"><td align="center">20 db</td><td align="center">10 db</td><td align="center">5 db</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td align="left">SNR/db</td><td align="center">21.1278</td><td align="center">13.4793</td><td align="center">11.8967</td></tr><tr><td align="left">SNRG/db</td><td align="center">1.1278</td><td align="center">3.4793</td><td align="center">6.8967</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The denoising result of ultrasonic signal at different noise levels.

Mathematical Problems in Engineering

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Table 1

Table 1: Study on the Thick-Walled Pipe Ultrasonic Signal Enhancement of Modified S-Transform and Singular Value Decomposition 