نتایج جستجو برای: earth pressure balance epb
تعداد نتایج: 629206 فیلتر نتایج به سال:
[1] The Urey ratio describes the contribution of internal heat production to planetary-scale energy balance, and knowing this thermal budget for Earth is essential to understand its long-term evolution. Internal heat production is provided by the decay of radiogenic elements, whose budget is constrained by geochemical models of Earth. Understanding the thermal budget thus requires contributions...
کنترل نشست در اعماق کم و محیطهای حساس یکی از مهمترین عملیات مهندسی تونل میباشد. دراین تحقیق پس از تحلیل عددی نشست تونل خط A مترو قم بوسیله نرم افزار FLAC که توسط TBM-EPB حفر شده بود و به دنبال آن معرفی روش حفاری مناسبی که با توجه به امکانات موجود در داخل کشور، علاوه بر میزان نشست کم این امکان را بدهد که هزینه و زمان ساخت یک سازه زیرزمینی با درجه قابل قبولی از دقت پیش بینی گردد، روش جدید حفار...
Earth sustains its magnetic field by a dynamo process driven by convection in the liquid outer core. Geodynamo simulations have been successful in reproducing many observed properties of the geomagnetic field. However, although theoretical considerations suggest that flow in the core is governed by a balance between Lorentz force, rotational force, and buoyancy (called MAC balance for Magnetic,...
lots of papers has been written about iran’s military strategy explain military strategy of iran is deterrence, but there is a little paper that explain why iran chose this strategy? the paper tries to answer this question. two hypotheses are presented as probable answers to the question: 1-chang of balance power in the middle east 2- intensification of u.s pressure on iran for regime change.lo...
Estimating active earth pressure accurately is very important when designing retaining wall. Based on the unified strength theory and plane strain assumption, an analytical solution has been developed to determine the active lateral earth pressure distribution on a retaining structure with the inclined cohesive backfill considering the effect of the intermediate principal stress. The solution d...
Most researches to SRL focus on English. It is still a challenge to improve the SRL performance of other language. In this paper, we introduce a twopass approach to do Chinese SRL with a Recurrent Neural Network (RNN) model. We use English Proposition Bank (EPB) to improve the performance of Chinese SRL. Experimental result shows a significant improvement over the stateof-the-art methods on Chi...
A series of physical modeling tests were conducted by means of a beam type geotechnical centrifuge machine in order to investigate the drainage impact on the slope failure mechanism under centrifugal acceleration. Meanwhile, the phenomenon of stress redistribution in undercut slopes and the formation of arching effect were studied. For this purpose, a poorly graded sandy soil (Silica sand No. 6...
This report presents an account of the demand made by solar radiation pressure 6n the attitude-control system of an earth satellite whose external configuration is in the shape of a rectangular prism, the surfaces being assumed to be perfectly reflecting. Expressions determining the amount of angular impulse that must be supp~ed by an attitude-control system in the course of a year in order to ...
Structural Reliability and Its Sensitivity Analysis by Hybrid Markov Chain with Correlated Variables
In the practical engineering, to answer the small failure probabilities with correlated highdimensional variables, the subset simulation (SS) is combined together with the Monte Carlo simulation and importance sampling (IS) method. The samples from the probability density functions of the importance sampling are used to construct the intermediate failure events, by which the small failure proba...
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