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11.
The fundamental solutions were obtained for step‐like point forces acting in three orthogonal directions and an instantaneous fluid point source in a fluid‐saturated, porous, infinite solid of transversely isotropic elasticity and permeability. After expressing the governing equations in the form of matrix in the Laplace space, we employed Kupradze's method together with the triple Fourier transforms. This method reduces the simultaneous partial differential equations with respect to three displacement components and a pore fluid pressure to a differential equation in terms of only one potential scalar function, which can be operationally solved in the transformed space. After the Laplace inversion of the potential, the residue theorem was applied to its Fourier inverse transform with respect to one of the transformation variables. The Fourier transforms with respect to two other variables were rewritten into the Hankel transforms. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
12.
Yoshimasa Toyota 《Journal of Oceanography》1988,44(4):157-162
The determination of dissolved Mn in sea water was carried out using a Chelex 100 resin and graphite furnace atomic absorption
spectrophotometer. The nearshore surface layer waters off the Straits of Kii had the highest Mn concentration of 6.40 n mol
kg−1 at these stations. Mn concentration of intermediate and deep water off the Straits of Kii ranged between 0.18 and 1.42 n
mol kg−1. Mn concentration in deep and bottom waters at the Mariana Trough were between 0.71 and 2.48 n mol kg−1. Sharp increases of Mn concentration near the bottoms were observed at two stations near the hydrothermal vents of the central
ridge of the Mariana Trough. 相似文献
13.
Yoshimasa Toyota Satoru Kanamori Michihiko Kodama Masahiro Furukawa Shiro Okabe 《Journal of Oceanography》1982,38(5):307-312
Sea water samples, still hot from volcanic emanations were taken in a bay of Nishinoshima-Shintô Island just after volcanic activity had ceased and were analysed for borate-B, fluoride-F and bromide-Br. The hot water is considered to be formed by the conservative mixing of volcanic emanations with sea water, and the emanations containedCl, B, F andBr in the ratio of 1∶1.84×10?3∶0.474×10?3∶6.47×10?3 by weight. RatiosB/Cl andF/Cl can be used as effective measures of the contribution of volcanic emanations to sea water. 相似文献
14.
Effect of basal guided waves on landslides 总被引：1，自引：0，他引：1
Yoshimasa Kobayashi 《Pure and Applied Geophysics》1994,142(2):329-346
A landslide model riding on basal guided waves is investigated to explain lower net frictions at high slide velocities from the wave-theoretical point of view. It is shown that there is a wave propagated along the basal layer at the phase velocity equal to the slide velocity, as well as a guided wave with considerably higher phase velocities propagated likewise along the basal layer as a leaking mode at low slide velocities. With increasing slide velocity the phase velocity of the guided wave decreases until it is equal to that of the slide mass. Over this threshold slide velocity, a sonic boom is generated around the basal layer, and the shock contributes to a loosening of the slide mass into a fluidized state. Landslides on long slide-ways are more liable to exceed this threshold velocity since their slide velocities tend to be higher than those on short slide-ways of a similar shape. Hence, the reduction of net friction of landslides can possibly be better correlated with the lengths of slide-ways than with the volumes of landslides as is widely maintained. 相似文献