振响
3.Sometimes your phone might not ring or vibrate when a call is received.
4.In addition, modal based detection and testing techniques, and damage types are well summarized and categorized. In the third chapter, damage identification theories using modal data, flexibility matrix, residual force vector, and frequency response function are presented, incorporating three novelty indicators (MAC_sfrf COMAC_sfrf, and Strain Frequency Response Function Curvature Ratio).
