Based on the elastic wave theory,and according to the wave function expansion method,the author studies the high frequency elastic wave scattering of the concrete structural hole,provides the expressions of the wave field analytical solution of the elastic wave in the structure,and analyzes the scattering wave field characteristics in different incident wave frequency.

The ZigBee technology radio-frequency signal can invade power plant equipment to produce the high frequency harmonic,and the harmonic going beyond standard is able to affect security and economical operati.