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201.
Shinya Inazumi Makoto Kimura Toshimitsu Kakuda Masakatsu Kobayashi 《Soils and Foundations》2011,51(6):1019-1035
In this research, under various conditions, we evaluate the water cut-off performance of H-jointed steel pipe sheet piles (SPSPs) with the H-H joints attaching water-swelling materials which are components of SPSPs for water cut-off in a coastal waste landfill site. Specifically, we research the water cut-off performance when these H-H joints have foreign particles, when they are in a wet-dry cyclic condition, and when the water-swelling material has deteriorated. As a result of this research, it has been found that in any of the above cases, H-jointed SPSPs with H-H joints attaching water-swelling materials are capable of providing water cut-off performance, and meet seepage control work standards as long as they are under less than certain pressure levels to be considered in coastal waste landfill sites. Also, it has been proved that the above conditions do not affect the water cut-off performance of H-jointed SPSPs with H-H joints attaching water-swelling materials. 相似文献
202.
Abstract Analytical expressions are derived for bispectra of triadic Cantor sets. The bispectra are numerically evaluated and represented by pseudo-colour patterns. Methods are discussed to derive fractal dimensions of the Cantor sets from their bispectra by making use of two different averaging operations. The results are compared with a similar analysis of power spectra of the fractal objects. 相似文献
203.
Abstract A general expression is derived for radiation efficiency, which is defined as a ratio of the radiated energy flux to the source-integrated intensity, of partially coherent planar sources with arbitrary intensity distributions. On the basis of the expression, radiation efficiencies of the sources with various intensity distributions are quantitatively investigated as a function of both the coherence condition and the intensity distribution across the source. By stemming from the present source model whose spatial coherence is characterized by Bessel functions, a physical origin of the variation in radiation efficiency is satisfactorily presented in connection with the spatial frequency spectrum of the source associated with evanescent waves. As a result, it is found that the broad spread in spatial frequency spectrum of the source results in the reduction of radiation efficiency for the sources with arbitrary intensity distributions including the quasi-homogeneous ones and that the behaviour of this kind is independent of the presence of evanescent waves, at least, for the quasi-homogeneous sources. 相似文献