To overcome the common shortcomings shared by the existing methods: weak suppression noise interference and feeble performance of time-frequency concentration. a novel time-frequency analysis method based on sparse repre-sentation was developed. which could get clear and concentrate time-frequency representation. Firstly. https://www.roneverhart.com/Small-Sebenza-31-Titanium-Carbon-Fiber-Handle-Insingo-CPM-MagnaCut-Blade-Blue-Single-Lug/