没有贫穷
发表于 2025-3-25 05:54:19
Tomography from seismic profilesofile, cross-hole, etc.). It may be applied to surveys of various scales (local, regional, DSS, etc.). It allows simultaneous usage of various types of waves (refracted, reflected, transformed). An outline of the structure of the program package is offered and both model and field data examples are presented.
反话
发表于 2025-3-25 08:27:09
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judiciousness
发表于 2025-3-25 11:40:01
Seismic data collection platforms for satellite transmissionwaves as possible, in order to extract an evenly distributed information. For global seismological studies, we are concerned with wavelengths larger than one kilometer. We will not consider the specific problems related to the oil industry. The industry has already performed tomographic experiments with several hundred sensors.
defile
发表于 2025-3-25 18:56:22
Ray tracing for surface waves of the Earth. Indeed they are guided waves with standing wave properties in a direction normal to this surface: along this direction the displacements are in phase at all depths. Thus their geometrical spreading, as guided waves, is less than that of body waves which propagate in 3 dimensions.
裂口
发表于 2025-3-25 21:31:25
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ELUDE
发表于 2025-3-26 02:27:16
Ray tracing algorithms in three-dimensional laterally varying layered structures orthogonal coordinate system, and in Section 7 into a spherical coordinate system. In all these cases, the ray tracing system is supplemented by the appropriate reflection/transmission laws which allow to perform the ray tracing and the travel time computations even ..
photopsia
发表于 2025-3-26 07:39:35
Crosshole transmission tomographyng elementary geometry. This is the basic idea as outlined by Fessenden. Although the procedure requires a fairly simple medium (only one or two ore bodies, homogeneous surroundings), it points forward to the present use of crosshole tomography.
先兆
发表于 2025-3-26 11:23:13
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integrated
发表于 2025-3-26 12:59:04
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托运
发表于 2025-3-26 18:50:09
On the validity of the ray approximation for interpreting delay timesof such waves and of their potential to interfere with the direct wave on which the tomographic interpretation is based. Strong diffraction effects are expected when the scale of heterogeneity is in the order of the seismic wavelength, but the smallest detail one wants to resolve with seismic tomogr