The electromechanical impedance (EMI) technique based on the PZT transducer. in the past twenty years of research progress. has demonstrated its potential for cost-effective and high damage-sensitive structural health monitoring. This paper presents an application of EMI technique for damage evolution investigation of initial damaged tunnel invert concrete under high traffic cyclic lo... https://parisnaturalfoodes.shop/product-category/thinning-hair-conditioner/