环形
发表于 2025-3-26 23:34:18
Applications,mes from the various subsurface layers have been carried out in both directions and the travel time curves from separate layouts have been connected by overlapping detectors. Since all examples given are of shallow investigations, rather small detector and shot separations have been used. The exampl
myocardium
发表于 2025-3-27 03:24:11
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In-Situ
发表于 2025-3-27 05:16:44
Instrumentation, field work and interpretation procedure,rmation and the interpretation work must do justice to the field data obtained. A fourth factor affecting the reliability of the results is the positioning of the seismic lines with regard to the geology and the possibilities and limitations of the method.
远地点
发表于 2025-3-27 13:14:22
Future prospects,gy sources available, an increased interest in including elastic constants, frequencies and amplitudes in evaluations, and a tendency to replace manual treatment of seismic data by computer processing clearly indicate the development to be expected.
RLS898
发表于 2025-3-27 13:43:48
Introduction,rker on the subject. By 1925 the refraction method was well established as a tool in applied geophysics. In the early days the method was used for oil exploration and for detecting hidden salt domes. At the beginning of the ’thirties the refraction technique was also seen to be applicable to civil engineering problems.
埋伏
发表于 2025-3-27 20:18:05
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Inkling
发表于 2025-3-27 23:51:10
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