56 Result(s)
within
Mohammad Ahmadi
English
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Article
Comparison of artificial neural network and multivariate linear regression methods for estimation of daily soil temperature in an arid region
Soil temperature (T S) strongly influences a wide range of biotic and abiotic processes. As an alternative to direct measurement, indirect determination of T S from...
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Article
Long-term variations of water quality parameters in the Maroon River, Iran
Sixteen water quality parameters have been monitored at four stations located along the Maroon River during 1989–2008. The trend analysis was performed on seasonal and annual time-scales using the Mann–Kendall...
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Article
Sex steroids, gonadal histology and biological indices of fall and spring Caspian lamprey (Caspiomyzon wagneri) spawning migrants in the Shirud River, Southern Caspian Sea
This study investigates sex steroids, gonadal histology and some biological indices of fall and spring spawning migrants of Caspian lamprey Caspiomyzon wagneri (Kessler, 1870). Blood and gonad samples were collec...
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Article
Open AccessRemoval of penicillin G from aqueous phase by Fe+3-TiO2/UV-A process
Anomalous use of antibiotics and their entrance into the environment have increased concerns around the world. These compounds enter the environment through an incomplete metabolism and a considerable amount o...
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Article
Volatile Fluid Recombination: A Case Study
Sampling process is one of the important tasks in petroleum engineering which is used to specify the fluid type and estimate PVT characteristics. Moreover, to perform geochemical and crude oil analyses, enough...
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Article
The Effect of Quench-Induced Residual Stresses on the Distortion of Machined Thin-Walled Parts
In the heat treatment process, during the quenching of aluminum alloy, a high level of residual stresses is observed due to the severe thermal gradient at the surface and center of the work piece, which acts a...
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Article
Erratum to: The Effect of Quench-Induced Residual Stresses on the Distortion of Machined Thin-Walled Parts
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Article
NSSC pulp from planted populus and hardwood sawdust for flutting production
This research was performed with the goal of using neutral sulfite semi chemical pulp (NSSC) from populous instead of all or part of MWPI’s NSSC pulp for producing fluting paper. Firstly, NSSC pulp was prepare...
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Article
Physical and mechanical properties of reinforced ply wood with natural fibers
In this study the reinforcing effect of date palm and kenaf fibers on practical properties of plywood manufactured from horn beam wood (Carpinus betulus) was investigated. Two types of fibers consist of kenaf and...
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Article
Applying an optimized proxy-based workflow for fast history matching
History matching is still one of the main challenging parts of reservoir study especially in giant brown oil fields with lots of wells. In these cases, history matching with conventional manual technique needs...
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Article
Chemical changes of wood fibers after hydrothermal recycling of MDF wastes
Annually, a large volume of medium density fiber board (MDF) wastes are generated which consists of used furniture and other constructed items, the parts obtained from trimming and edge cutting of boards in M...
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Article
Growth and mineral content of coriander (Coriandrum sativum L.) plants under mild salinity with different salts
Soil salinity is a complex issue in which various anions and cations contribute to have a general adverse effect on plant growth. In the present study, effects of salinity from various salts including sodium c...
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Article
History matching and uncertainty quantification for velocity dependent relative permeability parameters in a gas condensate reservoir
In gas condensate reservoirs, gas flow at large velocities enhances the gas permeability due to gas-liquid positive coupling which results in near-miscible flow condition. On the other hand, augmented pressure...
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Article
Free and bound phenolic and flavonoid compounds of Ferula persica obtained by different extraction methods and their antioxidant effects on stabilization of soybean oil
In this study, the maceration and ultrasound-assisted extraction methods were used to extract free and bound phenolic and flavonoid compounds from Ferula persica. The results revealed that F. persica extract obta...
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Article
Open AccessEnduring effect of permeability texture for enhancing accuracy and reducing uncertainty of reservoir fluid flow through porous media
Modeling reservoir permeability is one of the crucial tasks in reservoir simulation studies. Traditionally, it is done by kriging-based methods. More rigorous modeling of the permeability results in more relia...
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Article
Insights of new-generation reservoir property modeling (MPS methods) in assessing the reservoir performance for different recovery methods
Usage of an advanced geostatistical method for reservoir characterization results in more reliable insights of reservoir performance. Multiple-point statistic (MPS) methods which borrow ideas of texture synthe...
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Article
Open AccessEvolution of spherical overdensity in Chaplygin gas model
Even though many scalar field models of dark energy have been considered in the literature, there is another interesting class of dark energy models involving a fluid known as a Chaplygin gas. In addition to d...
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Article
Comparative study of different risk measures for robust optimization of oil production under the market uncertainty: a regret-based insight
Model-based production optimization relies on a dynamic model that simulates the fluid flow in the oil reservoirs, and an economic objective function that assigns an economic measure to the recoverable oil res...
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Article
Encapsulation of Lactobacillus casei in alginate microcapsules: improvement of the bacterial viability under simulated gastrointestinal conditions using flaxseed mucilage
In this study flaxseed mucilage (FM) was used for co-encapsulating probiotic Lactobacillus casei on the alginate (ALG) matrix. For this purpose, FM was extracted and its physicochemical properties were evaluated....
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Article
Investigation of the effect of large-scale atmospheric signals at different time lags on the autumn precipitation of Iran’s watersheds
In recent decades, the upgrading of information of human beings about the Earth’s climate and concern about climate change in the future has led to a better understanding of the components affecting the climat...
