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Register a new userstudy the effect of values of initial void ratio on values of elastic deformation modulus in sand
دراسة تأثير قيم معامل المسامية الإبتدائية على قيم معامل التشوه الخطي في الرمل
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يتضمن هذا البحث دراسة تجريبية على عينات من التربة الرملية أخذت من مناطق مختلفة في ريف دمشق (القسطل- معرونة- السليمة) و من حماة (السلمية) ، تم إجراء تجارب مخبرية فيزيائية و مصنفة بالإضافة إلى تجارب الانضغاط الآدومتري و تم دراسة وضعين حديين هما التخلخل الأعظمي و التراص الأعظمي لكل تربة. تم إيجاد قيم معامل التشوه E باستخدام منحنيات الانضغاط الآدومتري عند مجالات مختلفة من الضغط، و تم استنتاج المعادلات الرابطة بين قيم معامل التشوه و معامل المسامية الابتدائي، و المعادلات الرابطة بين قيم معامل التشوه و معامل رد فعل التربة الجانبي و ذلك في حالتي التخلخل و التراص الأعظميين.
This search include making laboratory tests on sandy soil samples ,wich were taken from Damascus Suburb (Alkastal-Maarona- Alsallema) and from Hama(Alsalameya), physical and clasificated tests were made besides oedometer tests, two limited cases were studied :maximum loose and maximum dense for each soil. Values of deformation modulus (E) were determined from oedometric compression curves at various compression levels, and then the experimental equations between deformation modulus and primary void ratio, and between modulus of lateral soil pressure and deformation modulus were concluded at maximum loose and maximum dense.
References used
CAVARRETTA, I . (2009) The Influence of Particle Characteristics on the Engineering Behaviour of Granular Materials, London university
POWER, M. G. (1953) A New Roundness Scale for Sedimentary Particlea Journal. of Sedimentary Petrology 23, No. 2, 117-119
LAMBE,W1969- Soil Mechanics. New york,553p
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This search include making laboratory tests on sandy soil samples
,wich were taken from Damascus Suburb (Alkastal-Maarona-
Alsallema) and from Hama(Alsalameya), physical and clasificated
tests were made besides oedometer tests, two limited cases w
ere
studied :maximum loose and maximum dense for each soil.
Values of deformation modulus (Eoed) were determined from
oedometric compression curves at various compression levels, and
particle shape parameters (sphericity-roundness-elongation) were
founded for each soil then the experimental equations between
last parameters and deformation modulus were concluded.
Laboratory program was conducted on different clayey soils to
determine linear modulus of elasticity, and to compare the results
with those concluded from field plate load testing.
This study investigated the effect of adding different
percentages of sand to several types of clay soils, Which used as
liners at solid waste landfill sites in order to find the best mixing
ratio (sand - clay).
Transfer learning that adapts a model trained on data-rich sources to low-resource targets has been widely applied in natural language processing (NLP). However, when training a transfer model over multiple sources, not every source is equally useful
for the target. To better transfer a model, it is essential to understand the values of the sources. In this paper, we develop , an efficient source valuation framework for quantifying the usefulness of the sources (e.g., ) in transfer learning based on the Shapley value method. Experiments and comprehensive analyses on both cross-domain and cross-lingual transfers demonstrate that our framework is not only effective in choosing useful transfer sources but also the source values match the intuitive source-target similarity.
The article aims to study the effect of layer thickness and reflection coefficient variation on the image of synthetic seismogram, which is generated by using Ricker Wavelet with wide range of frequencies (20-130Hz) and Vibrator Sweeps with many freq
uencies ranges (5-170Hz) as a known technique in reflection seismic method on land. The Researcher tried to
determine the relationship between signals recording times and reflection coefficients variation from first side, and recording times with layer thickness variation from second side. The result which is observed that; the recorded times increased proportionally with increasing of the layer thickness (as we
know), but it is delayed with exponential relation when the velocity and density are varied within the same layer. New manner is applied to represent the result by using the conversion of time seismic section to raster images by using GIS,
this way gave us ability to control the colored scale which reflects the amplitude of recorded signals, and follows the reflectors or get important information about signals amplitude even though the layer thickness is decreased less than wavelet length ten times if we used Ricker signal or Vibration Sweeps.
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