共查询到20条相似文献,搜索用时 31 毫秒
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《Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy》1999,24(3):215-220
Whenever data sampling is regular along a coordinate in space and/or time, it is relevant to look for approximate shift invariance which casts the forward problem into a convolution formulation. The resulting computations may be speeded up significantly through the Fourier transform. For nonlinear problems the Born approximation in horizontally stratified media leads to just such a result.In many cases the noise is well approximated by a stationary process, and it turns out that the resulting inverse solution is then a multi-channel deconvolution. This formulation allows very fast inversion in the periodic approximation of densely sampled high volume data sets.New applications within geophysical well logging, continuous geoelectrical sounding/profiling, and 3D helioseismic tomography demonstrate the wide applicability of this method. 相似文献
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N. A. Gnatus’ M. D. Khutorskoy V. K. Khmelevskoi 《Moscow University Geology Bulletin》2011,66(3):151-157
The geological-geophysical, methological, and economic aspects of extraction and utilization of petrothermal resources (“hot
dry rock thermal”) for thermal and electric energy production were considered. Heat collectors are hydraulic fracturing zones
of natural or artificially made cracks in the crystalline rocks of the basement; these rocks have higher temperature and can
be a kind of “thermal cauldron.” Detection of such “collectors” can be carried out by geophysical methods. When pumped out
of wells and warmed to 100–300°C, waters function as a heat transfer for thermal energy supply and electric energy generation.
If the technical problem of the rapid drilling of 6–10 km wells could be solved, then petrothermal energy will become competitive
with the traditional types of energy production and supply. 相似文献
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P. S. Moharir 《Journal of Earth System Science》1992,101(1):1-11
Parasnis has observed in a presidential address that geophysics is not a Popperian science in a major way. That is, hypotheses
are not consciously put forth in a falsifiable format and much of the effort goes in seeking supporting evidence for favoured
hypotheses. Parker evolved a parameter extremization strategy, initially to tackle the problem of non-uniqueness in geophysical
inference. Later he based a hypothesis testing proposal on it, which is refreshingly Popperian. It has not been adopted widely,
partly because it requires global extrema, and not local and this has been regarded as a problem with no solution. Attention
is drawn towards tunnelling algorithm, which solves the problem of global optimization successfully, makes Parker’s Popperian
proposal practical and extends the range of Popperian geophysics. 相似文献
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固体地球物理学与板块大地构造学的交汇 总被引:1,自引:0,他引:1
文中从固体地球物理学与板块大地构造学的交融合汇历史出发,诉述岩石圈探测与大地构造物理学的基本思路。大地构造物理学的研究包括以下5个方面内容: 大陆岩石圈调查;区域壳幔结构的成像和解构;全球对比同类大地构造单元的壳幔结构;动力学分析找出每一种大地构造单元生成和演化规律;验证动力学作用模式。以实例说明了区域壳幔结构的解构。最后提出当前大地构造物理学的研究方向与问题。 相似文献
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