On the basis of theoretical analysis and on-the-spot investigation,the attenuation rule of oscillation speed in Wushan Copper Mine is obtained upon repeated researches on the collected data,providing useful evidences for the clarification of explosive amount.

The ANN for attenuation rule of 3D seismic parameters is studied in the paper.

In order to establish a low strain method of quantitative analysis of pile defects considering pile-soil interaction,the attenuation rule of velocity wave along pile shaft was studied under different pile-soil interaction damping coefficients.

Based on the research of hydrogeological condition,the distribution and attenuation of COD of Sanlidian channel in unconfined aquifer are studied by numerical simulation.

Based on the science of combustion,the explosion dynamics and the applied mathematics,the study of gas explosion spreading and attenuation can be made from the reaction angle between the explosion and the environment.

The wave intensity change equations are applied with the purpose of studying the detonation attenuation.

Analysis of attenuation law and characteristic parameters in excavation roadway during gas explosion;

Influential factors analysis of blasting vibration attenuation law;

Analysis on attenuation law of axial velocity during the initial stage of tunnel fire;

Based on the observed data of strong motion acceleration in California and other states of USA,the attenuation pattern of peak horizontal and vertical acceleration and square root of short time mean squares is studied by regressive analyzing method.