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Dipole sounding resistivity measurements over layered earth can be interpreted directly by adapting the procedure given by Koefoed (1968) for Schlumberger system. To carry out the first step of the interpretation leading to the determination of the raised kernel function, partial resistivity functions for the dipole method are derived and given in the form of standard curves. The second step involving the derivation of layering parameters from the kernel being independent of the electrode configurations remains unaltered. The applicability and limitations of the method are discussed. 相似文献
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基别尔(И.А.Кибель)教授的温度和气压变化的理论,为天气学的发展提出了新的方向,成为苏联天气学上先进的平流动力分析方法的理论基础.这个理论被介绍到我国以後,在我国气象工作者中引起了广泛的讨论和学习. 相似文献
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HANNA RUSZCZY&#;SKA-SZENAJCH 《Boreas: An International Journal of Quaternary Research》1982,11(3):249-260
Three kinds of end moraines, depending most probably on climatic conditions affecting depositional environments, are characterized: (1) fluvioglacial end moraines - built of gravels and sands froming fans superimposed on one another, and accumulated by abundant melt water during intense melting of an ice front in a comparatively warm environment; (2) 'Glacial' end moraines - built of flow tills accumulated during slow melting in a comparatively cold environment; and (3) fluvioglacial-and-glacial end moraines, the most widespread ones in Polish lowlands – built of fluvioglacial stratified gravels and sands and of glacial 'flow' deposits; zones of considerable prevalence of glacial deposits over fluvioglacial ones may probably point to comparatively cold stages during deposition, and vice versa. The question of deposition of end moraines in distal and proximal direction, and their geological and geomorphological features is also briefly discussed. 相似文献
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R. T. TAYLOR M. L. HANNA N. N. SHAH D. R. SHONNARD A. G. DUBA W. B. DURHAM 《水文科学杂志》2013,58(4):323-342
Abstract An in situ microbial filter technology is being tested and developed for remediating migrating subsurface plumes contaminated with low concentrations of trichloroethylene (TCE). The current focus is the establishment of a replenishable bioactive zone (catalytic filter) along expanding plume boundaries by the injection of a representative methanotrophic bacterium, Methylosinus trichosporium OB3b. This microbial filter strategy has been successfully demonstrated using emplaced, attached resting cells (no methane additions) in a 1.1 m flow-through test bed loaded with water-saturated sand. Two separate 24 h pulses of TCE (109 ppb and 85 ppb), one week apart, were pumped through the system at a flow velocity of 15 mm h?1; no TCE (< 0.5 ppb) was detected on the downstream side of the microbial filter. Subsequent excavation of the wet sand confirmed the existence of a TCE-bioactive zone 21 days after it had been created. An enhanced longevity of the cellular, soluble-form methane monooxygenase produced by this methanotroph is a result of the laboratory bioreactor culturing conditions. Additional experiments with cells in sealed vials and emplaced in the 1.1 m test bed yielded a high resting-cell finite TCE biotransformation capacity of about 0.25 mg per mg of bacteria; this is suitable for a planned sand-filled trench field demonstration at a Lawrence Livermore National Laboratory site. 相似文献
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In the course of my study on the Chihsia Corals from Central China, Mr. Y. T. Chao my collegue of the Geological Survey was so kind as to hand over to me two specimens of tube corals which he personally found in a limes- 相似文献
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In a commemorable evening—I believe it was in the early part of December, 1933—when I happened to discuss the problem of Pleistocene climate in China with the late Dr. Davidson Black, I informed him, without 相似文献
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Maping, formerly named Liuchow, is one of the well known cities in Central Kwangsi. The geology of the Maping district and its neighbouring areas were preliminarily surveyed by S. S. Yoh in 1929. In our journey across the Nanling Range we passed through t 相似文献