نتایج جستجو برای: permeability

تعداد نتایج: 50224  

Journal: :جنگل و فرآورده های چوب 0
رضا قمری دانشجوی کارشناسی ارشد صنایع چوب و کاغذ، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران اصغر طارمیان دانشیار گروه علوم و صنایع چوب و کاغذ، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

in this research, the bioinsising impact of two wood decay fungi (pysisporinus vitreus and xylaria longipes) on radial air permeability and moisture diffusion coefficient of spruce wood (picea abies) was investigated. fungal cultivation was performed in an incubator at 25 °c and 85% relative humidity for 15, 30 and 45 days. results showed that the permeability, moisture diffusion and mass loss ...

Journal: :Botanical Gazette 1912

Journal: :iranian biomedical journal 0
مهدی نعمت بخش mehdi nematbakhsh پریچهر حیات داودی parichehr hayat‑davoodi پروین رجبی parvin rajabi سیدحسین ثمریان seyyed‑hossein samarian

estrogen replacement therapy (ert) in postmenopausal women may decrease the risk of coronary artery diseases (cad). we hypothesized that nitric oxide (no) releasing due to ert may be the essential factor by which endothelial permeability decreases. four groups of ovariectomized rabbits were under investigation for five weeks. groups 1 & 4 received high cholesterol diet and other two groups (2 &...

ژورنال: :نشریه علمی-پژوهشی مهندسی معدن 2012
صادق کریم پولی نادر فتحیان پور جابر روحی

reservoir permeability is a critical parameter for the evaluation of hydrocarbon reservoirs. there are a lot of well log data related with this parameter. in this study, permeability is predicted using them and a supervised committee machine neural network (scmnn) which is combined of 30 estimators. all of data were divided in two low and high permeability populations using statistical study. e...

The present paper investigates the influence of stabilization with cement, peat ash, and silica sand on permeability coefficient (kv) of compacted clay, using a novel approach to stabilize the clay with peat ash as a supplementary material of cement in the compacted and stabilized soil. In order to assess the mentioned influence, test specimens of both untreated and stabilized soil have been te...

The prediction of porosity is achieved by using available core and log data; however, the estimation of permeability is limited to the scare core data. Hence, porosity and saturation data through the framework of flow units can be used to make an estimation of reservoir permeability. The purpose of this study is to predict the permeability of a carbonate gas reservoir by using physical-based em...

This paper addressed the application of new hydrophobic synthesized calcium oxide (CaO) and silicon dioxide (SiO2) nanofluids to low permeability carbonate porous media. Crude oil and plugs were selected from one of oil reservoirs in the west of Iran. The main goal of this paper is comparing the results of improving water-oil relative permeability parameters in low permeability plugs...

ژورنال: مهندسی معدن 2010
جابر روحی صادق کریم پولی نادر فتحیان پور,

Reservoir permeability is a critical parameter for the evaluation of hydrocarbon reservoirs. There are a lot of well log data related with this parameter. In this study, permeability is predicted using them and a supervised committee machine neural network (SCMNN) which is combined of 30 estimators. All of data were divided in two low and high permeability populations using statistical study. E...

Journal: :iranian journal of oil & gas science and technology 2012
sajjad gholinezhad mohsen masihi

the prediction of porosity is achieved by using available core and log data; however, the estimationof permeability is limited to the scare core data. hence, porosity and saturation data through theframework of flow units can be used to make an estimation of reservoir permeability. the purposeof this study is to predict the permeability of a carbonate gas reservoir by using physical-basedempiri...

Journal: :محیط شناسی 0
مهدی جلیلی قاضی زاده دانشجوی دکتری مهندسی محیط زیست، دانشکده محیط زیست دانشگاه تهران محمدعلی عبدلی استاد مهندسی عمران دانشکده محیط زیست دانشگاه تهران ادوین صفری استادیار برنامه ریزی دانشکده محیط زیست دانشگاه تهران

due to availability of proper materials in landfills (at most parts of iran especially in kahrizak) and also less expenditure of this liner in comparison with other liners it can be count as an acceptable choice. different studies imply that one of the most important factors for soil liner selection is local conditions and also liner compatibility with generated leachate in studied site. hydrau...

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