An analysis of a passive seismic method 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。
The two cross correlations sum up to realize plane wave imaging at subsurface.
二者互相关求和，实现平面波地下波场成像。
Reflections are the main carriers of subsurface structures, and also the main information used in seismic imaging.
反射波是地下构造信息的主要载体，是地震成像的主要信息。
The paper reviews briefly the imaging of underground objects such as the imaging of subsurface buried pipelines, the detection underground cavities, and the prospection of gold.
本文介绍了地下物体检测和成象的一些应用：例如地下埋设管子的成象、地下洞穴检测、黄金勘探等。
Laminated imaging of the subsurface structures of materials has been successfully realized by this technique because thermal waves are heavily damped and have short wavelengths.
由于热波是一种高衰减波，且波长短，现已成功地实现了对材料亚表面结构的分层成像。
Imaging logs have good effect in evaluating the geological characteristics of subsurface carbonate reservoirs, but their cost is high.
成像测井对于评价碳酸盐岩储层地质特征有很好的效果，但成本较高。
Imaging logs have good effect in evaluating the geological characteristics of subsurface carbonate reservoirs, but their cost is high.
成像测井对于评价碳酸盐岩储层地质特征有很好的效果，但成本较高。
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