Artificial Neural Network and Firefly Algorithm for Estimation and Minimization of Ground Vibration Induced by Blasting in a Mine     

Bayat  Parichehr  Monjezi  Masoud  Rezakhah  Mojtaba  Armaghani  Danial Jahed 《Natural Resources Research》2020,29(6):4121-4132

Natural Resources Research - It is of a high importance to introduce intelligent systems for estimation and optimization of blasting-induced ground vibration because it is one the most unwanted...  相似文献   

Technical and Non-technical Challenges of Development of Offshore Petroleum Reservoirs: Characterization and Production     

Seyyedattar  Masoud  Zendehboudi  Sohrab  Butt  Stephen 《Natural Resources Research》2020,29(3):2147-2189

Natural Resources Research - Offshore oil and gas reservoirs comprise a significant portion of the world’s reserve base, and their development is expected to help close a potential gap in the...  相似文献   

Introducing a new learning method for fuzzy descriptor systems with the aid of spectral analysis to forecast solar activity     

Masoud Mirmomeni  Masoud Shafiee  Caro Lucas  Babak Nadjar Araabi   《Journal of Atmospheric and Solar》2006,68(18):2061-2074

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Geostatistics of near-surface moisture in bare cultivated organic soils   总被引：4，自引：0，他引：4  

Franois Anctil  Renaud Mathieu  Lon-tienne Parent  Alain A. Viau  Mathali Sbih  Masoud Hessami 《Journal of Hydrology》2002,260(1-4):30-37

The aim of this study was to characterise fine scale patterns of organic soil moisture content in the top 5 cm by means of semi-variogram modelling. Soil moisture content was observed along a transect on 2 occasions, early in the 1999 growing season to avoid any influences originating from vegetation and cultural practices. Soil moisture values were found to be normally distributed and were not significantly correlated with the soil organic matter content. Many similarities were depicted between the exponential semi-variograms characteristics of this study and another one in mineral soils, reported in the literature, except for the much higher sills associated with organic soils. Of particular interest were similar correlation lengths, indicating that a correlation range of the order of 100 m should be expected for mineral soils and for the level of moisture and organic matter contents found in this study.  相似文献   

SCOUR HOLE CHARACTERISTICS BELOW FREE OVERFALL SPILLWAY   总被引：1，自引：0，他引：1  

Masoud GHODSIAN  Ardeshir Azar FARADONBEH 《国际泥沙研究》2002,17(4)

1 INTRODUCTION Flow through hydraulic structures often issues in the form of jets. The jet velocities are usually high enough to produce sizable, even dangerous scour hole. The extent of the resulting scour depends on the nature of bed material and flow characteristics. The erosion process is quite complex and depends upon the interaction of hydraulic and morphological factors. Scouring may lead to: endangering the stability of the structure by structural failure or increased seepage, end…  相似文献   

Three-dimensional nonlinear seismic analysis of concrete faced rockfill dams subjected to scattered P,SV, and SH waves considering the dam–foundation interaction effects     

Ali Seiphoori  S. Mohsen Haeri  Masoud Karimi 《Soil Dynamics and Earthquake Engineering》2011,31(5-6):792-804

In this study, the nonlinear seismic analysis of a typical three-dimensional concrete faced rockfill dam is reported. Three components of the Loma Prieta (Gilroy 1 station) earthquake acceleration time history are used as input excitation. The dam under study is considered as if it were located in a prismatic canyon with a trapezoidal cross-section. A nonlinear model for the rockfill material is used, and contact elements with Coulomb friction law are utilized at the slab–rockfill interface. Vertical joints in the face slab are also considered in the finite element model. A substructure method, in which the unbounded soil is modelled by the scaled boundary finite element method (SBFEM), is used to obtain the scattered motion and interaction forces along the canyon. The dam is subjected to spatially variable P, SV, and SH waves, and the effect of dam–foundation interaction and the reservoir water effects are considered. The results are compared with the non-scattered input motion analysis. Results of the analyses indicate that due to applying the scattered motion to the canyon the response of the dam and concrete face slab significantly increases. The reservoir water pressure affects the tensile stresses induced in the face slab by reducing the uplift movement of the concrete panels.Large horizontal axial forces are induced in the face slab due to out-of-phase and out-of-plane motions of the abutments. Although the normal movements of vertical joints are reduced due to the reservoir water confinement, the opening movements are still significant, and the local failure of construction joints is inevitable.  相似文献   

Platform Evolution in an Oligo–Miocene Back-arc Basin: An Example from the Central Iran Basin     

Masoud SHARIFI-YAZDI  Amirhossein ENAYATI  Jamal SALEHI AGHDAM  Mohammad BAHREHVAR  Seyed Mustafa REZAEI 《《地质学报》英文版》2024,98(1):185-206

The Qom Formation is the most important hydrocarbon reservoir target in Central Iran. The Qom platform developed in a back-arc basin during the Oligo–Miocene due to the closing of the Tethyan Seaway. This formation consists of a variety of carbonate and non-carbonate facies deposited on a platform ranging from supratidal to basin. A combination of tectonic and eustatic events led to some lateral and vertical facies variations in the study area. Six third-order depositional sequences and related surfaces were identified regarding vertical facies changes in the studied sections of this Oligo–Miocene succession. According to all results and data, this succession was initially deposited during the Chattian upon a distally steepened ramp of siliciclastic-carbonate composition, including the Bouma sequence. Then, from the late Chattian to the Aquitanian, the platform changed into a homoclinal carbonate ramp with a gentle profile. With respect to tectonic activity, this phase was a calm period during the deposition of the Qom Formation. Finally, a drowned carbonate platform and a rimmed shelf emerged during the Burdigalian, terminated by the continental deposits of the Upper Red Formation. Regarding all geological characteristics, three main tectono-eustatic evolutionary phases have been recognized in the Qom back-arc basin.  相似文献   

Impact of column-to-beam strength ratio on the seismic response of steel MRFs     

Arash E. Zaghi  Siavash Soroushian  Ahmad Itani  E. Manos Maragakis  Gokhan Pekcan  Masoud Mehrraoufi 《Bulletin of Earthquake Engineering》2015,13(2):635-652

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Seismic design of yielding structures on flexible foundations          下载免费PDF全文

Masoud Moghaddasi  Gregory A. MacRae  J.  G. Chase  Misko Cubrinovski  Stefano Pampanin 《地震工程与结构动力学》2015,44(11):1805-1821

This paper introduces a simple method to consider the effects of inertial soil–structure interaction (SSI) on the seismic demands of a yielding single‐degree‐of‐freedom structure. This involves idealizing the yielding soil–structure system as an effective substitute oscillator having a modified period, damping ratio, and ductility. A parametric study is conducted to obtain the ratio between the displacement ductility demand of a flexible‐base system and that of the corresponding fixed‐base system. It is shown that while additional foundation damping can reduce the overall response, the effects of SSI may also increase the ductility demand of some structures, mostly being ductile and having large structural aspect ratio, up to 15%. Finally, a design procedure is provided for incorporation of the SSI effects on structural response. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   

Effect of Operating Parameters on the Performance of a Thiobacillus thioparus‐Immobilized Polyurethane Foam Biotrickling Filter for Hydrogen Sulfide Removal          下载免费PDF全文

Niloofar Abdehagh  Masoud T. Namini  Babak Bonakdarpour  Seyed Mohammad Heydarian 《洁净——土壤、空气、水》2014,42(9):1311-1317

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