An analysis of a passiveseismicmethod for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers.
本文提出用于地下成像无源地震方法的分析，在该方法中应用环境地震噪声作为地下散射体的照明源。
2
Depending on the degree of safety to achieve structural control technique like active isolation, passive isolation or conventional seismic design method can be chosen.
依据所要达到的安全程度，可选择采用主动隔震结构控制技术、被动隔震结构控制技术或传统的抗震设计方法。
3
Then fuzzy semiactive control strategy is proposed to control horizontal seismic response and passive control method is used to reduce the vertical response.