نتایج جستجو برای: sand absorbing region
تعداد نتایج: 576229 فیلتر نتایج به سال:
The variable-split formulations of the perfectly matched layers absorbing boundary condition (PML) are derived for the 2D elastic wave-equation and tested for both homogeneous and layered velocity models by applying the 2-4 staggered-grid finitedifference scheme. Test results are compared with those by Cerjan’s sponge zone absorbing boundary condition. The comparison indicates that PML is signi...
Abstract This paper deals with the results of different treatment done on high Strength concrete waste materials, like Bagasse ash, Waste foundry Sand and Jute fiber. disposal this leads to land pollution is very tricky time consuming process. The in study shows that bagasse ash cannot be used much quantity strength due its water absorbing nature it reduces workability after particular replacem...
The sand rat Psammomys obesus is a gerbil species native to deserts of North Africa and the Middle East, and is constrained in its ecology because high carbohydrate diets induce obesity and type II diabetes that, in extreme cases, can lead to pancreatic failure and death. We report the sequencing of the sand rat genome and discovery of an unusual, extensive, and mutationally biased GC-rich geno...
introduction dominant process in arid and semi-arid region is dynamic of wind that carries the sand and caused damage to several facilities and human settlements. there are many human settlements with low population and mostly small and scattered in different parts of foothills of dasht-e lut (lut desert), especially in mountainous margins of alluvial fans. residential and cultivation area of t...
A model for the formation and evolution of longshore sand ridges in waters deeper than the shoaling region suggests that a possible but by no means exclusive agent for the formation of these bars are weakly nonlinear dispersive long waves. The model describes how these water waves, which are represented by wave packets, and a sandy bottom topography, conspire to produce sand ridges. This study ...
the caspian sea contains great resources of oil and gas. the caspian sea is a 700- mile- long body of water in central asia, land located between azerbaijan, iran, kazakhstan, russia and turkmenistan. iran was challenges and opportunities in the caspian region. key question in this thesis includes three section that first question, opportunities of iran in the caspian region, second question ch...
Sand dripping in 1 dimensional Sand Pile Model is rst studied. Patterns and signals appear. Their behaviors and interactions are explained and asymptotic approximations are made. The total collapsing time of a single stack of sand is linear in function of the number of grains.
Let $R$ be a commutative ring and let $I$ be an ideal of $R$. In this paper, we will introduce the notions of 2-absorbing $I$-prime and 2-absorbing $I$-second submodules of an $R$-module $M$ as a generalization of 2-absorbing and strongly 2-absorbing second submodules of $M$ and explore some basic properties of these classes of modules.
The reaction rate theory of Miller, Schwartz and Tromp is reformulated using a complex Bloch boundary value operator to enforce the scattering boundary conditions. This Bloch operator requires a knowledge of the log derivative of the outgoing wave function on the boundary of the interaction region, and this in turn can be approximated semiclassically from a knowledge of the interaction potentia...
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