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Earthquake Engineering and Engineering Vibration 2016年第3期15卷 445-455页

作者： reza s.jalali Zaniar Tokmechi Department of Civil Engineering Faculty of Engineering University of Guilan

The plane-wave assumption for incident sH waves can be a good approximation for cylindrical and spherical waves radiated from finite sources, even when the source is as close as twice the size of the inhomogeneity, and when the source and the inhomogeneity are described within the same coordinate system. However, in a more general setting, and when the fault＇s radiation pattern must be considered, the plane-wave approximation may not yield satisfactory answers for arbitrary orientation of the fault. jalali et al. （2015） demonstrated this for a semi-cylindrical, sedimentary valley, and in this study we extend their results to a case in which the semi-circular, sedimentary valley is replaced by a canyon. We describe the effects of incident cylindrical waves on the amplitudes of surface motion in and near the semi-cylindrical canyon when the causative faults are at different distances and have different curvatures and orientations.

关键词： plane sH waves cylindrical sH waves effects of arbitrary fault orientation on amplification of surfacemotions

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Journal of Rare Earths 2018年第10期36卷 1106-1111页

作者： sardar Ahmad M.shafiq Rashid Ahmad s.jalali-Asadabadi Iftikhar Ahmad Department of Chemistry University of Malakand Center for Computational Materials science University of Malakand Department of Physics Abbottabad University of Science and Technology Department of Physics Faculty of SciencesUniversity of Isfahan

In this paper, we explored the structural, elastic and mechanical properties of the strongly correlated electron systems, intermetallic Ln-Au（Ln = Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu） in cubic structure,using PF-LAPW method within the density functional theory. structural properties of these intermetallics were investigated by treating the exchange-correlation potential with the GGA-PBE, GGA-PBEsol and GGA ＋ U. The effectiveness of the U for the structural properties as compared to other methods confirms the strong correlated nature of these compounds and the calculated lattice constants endorse the divalency of Yb. The results demonstrate the stable cubic CsCl structure of these compounds. Bulk modulus, Young＇s modulus, shear modulus, B/G ratio, Cauchy pressure, Poisson＇s ratio, anisotropic ratio,Kleinman parameters and Lame＇s coefficients were studied using the PBEsol to evaluate their importance in various types of engineering applications. The most prominent features of these compounds are their ductility, very high melting points, resistance to corrosion, and anisotropic nature.

关键词： strongly correlated electron systems Rare-earth monoaurides Mechanical properties Ab-initio calculation

Prediction of vertical displacement for a buried pipeline subjected to normal fault using a hybrid FEM-ANN approach

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Frontiers of structural and Civil Engineering 2024年第3期18卷 428-443页

作者： Hedye jalali reza YEGANEH KHAKsAR Danial MOHAMMADZADEH s. Nader KARBALLAEEZADEH Amir H.GANDOMI Department of Civil Engineering Architecture and UrbanismSadjad University of TechnologyPO Box ***MashhadIran Department of Civil Engineering Faculty of EngineeringEqbal Lahoori Institute of Higher EducationPO Box ***MashhadIran Faculty of Civil Engineering Architectureand ArtScience and Research Branch of Islamic Azad UniversityPO Box ***TehranIran Faculty of Engineering&Information Technology University of Technology SydneyUltimoNSW 2007Australia University Research and Innovation Center(EKIK) Óbuda UniversityBudapest 1034Hungary

Fault movement during earthquakes is a geotechnical phenomenon threatening buried pipelines and with the potential to cause severe damage to critical ***,effective prediction of pipe displacement is crucial for preventive management *** study aims to develop a fast,hybrid model for predicting vertical displacement of pipe networks when they experience *** this study,the complex behavior of soil and a buried pipeline system subjected to a normal fault is analyzed by using an artificial neural network(ANN)to generate predictions the behavior of the soil when different parameters of it are *** this purpose,a finite element model is developed for a pipeline subjected to normal fault *** data bank used for training the ANN includes all the critical soil parameters(cohesion,internal friction angle,Young’s modulus,and faulting).Furthermore,a mathematical formula is presented,based on biases and weights of the ANN *** results show that the maximum error of the presented formula is 2.03%,which makes the proposed technique efficiently predict the vertical displacement of buried pipelines and hence,helps to optimize the upcoming pipeline projects.

关键词： buried pipelines normal Fault finite element method multilayer perceptron neural network formulation

Distinguished discriminatory separation of CO2 from its methane-containing gas mixture via PEBAX mixed matrix membrane

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Chinese Journal of Chemical Engineering 2018年第1期26卷 73-80页

作者： Pouria Abbasszadeh Gamali Abbass Kazemi reza Zadmard Morteza jalali Anjareghi Azadeh rezakhani reza Rahighi Mohammad Madani Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)P.O.Box:14665-1998TehranIran Chemical&Chemical Engineering Research Center of lran P.O.Box:14335-186TehranIran College of Environment Standard SquareP.O.Box:31746-118KarajIran Department of Research and Development Sharif Ultrahigh Nanotechnologists(SUN)CompanyP.O.Box:13488-96394TehranIron Nanotechnology Department Agricultural Biotechnology Research Institute of lran(ABRII)AREEO*** KarajIran

Highly selective separation of CO_2 from its methane-containing binary gas mixture can be achieved by using Poly(ether-block-amide)(PEBAX)mixed matrix membranes(MMMs).According to FEsEM and AFM analyses,silica-based nanoparticles were homogenously integrated within the polymer matrix,facilitating penetration of CO_2 through the membrane while acting as barrier for methane *** membrane containing 4.6 wt% fumed silica(Fs)(PEBAX/4.6 wt%Fs)exhibits astonishing selectivity results where binary gas mixture of CO_2/CH_4 was used as feed *** detected by gas chromatography,in the permeate side,data showed a significant increase of CO_2 permeance,while CH_4 transport through the mixed matrix membrane was not ***,PEBAX/4.6 wt%Fs greatly exceeds the Robeson *** to data reported on CO_2/CH_4 gas pair separation in the literature,the results achieved in this work are beyond those data reported in the literature,particularly when PEBAX/4.6 wt%Fs membrane was utilized.

关键词： Mixed matrix membrane Fumed silica Binary gas mixture CO2/CH4 separation

Improving TC drill bit's efficiency and resistance to wear by graphene coating

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Petroleum Research 2022年第4期7卷 430-436页

作者： reza Taheri Mohsen jalali Ahmed Al-Yaseri George Yabesh Petroleum Engineering Department University of WyomingWYUSA Petroleum Engineering Department Tehran Azad UniversityTehranIran Petroleum Engineering Discipline Engineering SchoolEdith Cowan UniversityAustralia

Displaying a two-dimensional pure crystal carbon structure,Graphene is the strongest,yet thinnest substance discovered by *** tungsten carbide(TC)drill bits with graphene to evaluate the effect of graphene on the wear,as well as the rate of penetration of the drilling bit was examined in this *** evaluation approaches were employed:one with employing ANsYs software and the second by employing atomic pressure chemical vapor deposition(APCVD synthesis)in the laboratory to produce a monolayer graphene *** simultaneous software-based and lab-based testing were performed to increase the credibility of the results and minimize the potential *** the simulation using ANsYs,the maximum shear elastic strain,equivalent elastic strain,equivalent(von mises)stress,total deformation and maximum shear stress were investigated prior and after the gra-phene coating was applied on TC simulated *** deformation was only slightly increased,while the maximum shear elastic strain was almost doubled,reflecting that the bit's wear was significantly reduced after the ***-based APCVD synthesis results showed 34%increase in compressive strength of the coated bit,in comparison to the uncoated *** failure occurred for uncoated bit at 35 MPa,where the coated bit experienced failure at 46.9 *** Von Mises stress test conducted on the coated and uncoated samples also indicated that this stress was 41%less for the coated bit,in comparison to the uncoated ***,two small-scale drilling operations,one using a 1inch graphene-coated TC bit and the other using a 1inch non-coated TC bit,were performed on a granite block,to evaluate the performance of the graphene-coated bit in *** a chosen 120-min time frame,27 consecutive holes could be drilled by the graphene-coated TC bit,while 19 consecutive holes could be drilled by the uncoated TC bit,in identical drilling *** implies a 42%increase in ROP.

关键词： Drill bit's efficiency Graphene-coated ANsYs APCVD Wear reduction Penetration rate

Recent progress and perspective in additive manufacturing of EMI shielding functional polymer nanocomposites

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Nano Research 2023年第1期16卷 1-17页

作者： Amirjalal jalali Ruiyan Zhang reza Rahmati Mohammadreza Nofar Mohini sain Chul B.Park Center for Biocomposites&Biomaterials Processing John H.Daniels Faculty of ArchitectureLandscapeand DesignUniversity of TorontoTorontoOntario M5S 3B3Canada Microcellular Plastics Manufacturing Laboratory Department of Mechanical and Industrial EngineeringUniversity of Toronto5 King's College RoadTorontoOntario M5S 3G8Canada state Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Key Laboratory of Photovoltaic MaterialsSchool of Materials and New EnergyNingxia UniversityYinchuan 750021China Metallurgical&Materials Engineering Department Faculty of Chemical and Metallurgical EngineeringIstanbul Technical UniversityMaslakIstanbul 34469Turkey

Because of rapid progress in the electronics industry,the market has faced a huge demand for novel materials in the field of electromagnetic interference(EMI)*** functional polymer composites have demonstrated great potential to fulfill this *** synthesize the polymeric composites,functional conductive nanoadditives such as graphene,carbon nanotubes,and MXene are commonly added to polymeric matrices,and the conductive polymer nanocomposites exhibit promising electrical conductivity as well as EMI shielding *** manufacturing(AM),also referred to as threedimensional(3D)printing,has been increasingly employed to fabricate complicated geometry components in the medical,aerospace,and automotive *** has also been used to fabricate advanced EMI shielding materials for sensors,supercapacitors,energy storage devices,and flexible *** review aims at introducing the different 3D printing methods applied for the fabrication of EMI shielding polymer *** impact of the AM process on the functionality of the samples is also ***,the influence of the nanofiller type and amount on the microstructure and performance of the fabricated nanocomposites is ***,the prospects and recommended works for future study are outlined.

关键词： additive manufacturing electromagnetic interference(EMI)shielding functional polymer nanocomposites stretchable electronics

Assessment of mobile and potential mobile trace elements extractability in calcareous soils using different extracting agents

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Frontiers of Environmental science & Engineering 2020年第1期14卷 109-125页

作者： Mohsen jalali Ziba Hurseresht Department of soil science College of AgricultureBu_Ali Sina UniversityHamedanIran

Understanding trace elements mobility in soils,extracting agents,and their relationships with soil components,are essential for predicting their movement in soil profile and availability to plants.A laboratory study was conducted to evaluate extractability of cadmium(Cd),cobalt(Co),copper(Cu),nickel(Ni),and zinc(Zn)from calcareous soils utilizing various extracting agents to be specific CaCU,DTPA,EDTA,HNO3,MgCl2,NaN03,NH4NO3,and *** analysis indicated that DTPA and NH4OAc,HN03 and EDTA,and M gCl2 and NH4NO3 extracting agents yielded comparative values,whereas NaN03 and CaCl2 have shown different behavior than other extracting agents for all studied trace *** speciationof extracted trace elements in solutions indicated that in the CaCl2,NaN03,NH4NO3,and MgCl2 extracting agents most extracted Cd,Co,Ni,Zn,and part f Cu were as free ions and may be re-adsorbed on soils,leading to lower extractability,whereas,in the caseof HNO3 extracting agent,the likelihoodof re-adsorptionof trace elements may be *** resultsof speciationof trace elements using NH4OAc DTPA,and EDTA extracting agents showed that Me-(Acetate)3,Me-(Acetate)2(aq),Me(DTPA)3-3-,Me(EDTA)2-.and MeH(EDTA)-complexes dominated in solutions indicating that the extracted trace elements may not be re-adsorbed on soils,leading to higher *** resultsof this study are useful for short and long-term evaluationsof trace elements mobility and further environmental impacts.

关键词： Mobility Calcareous soils Extracting agents Trace elements

Prediction of cavity growth rate during underground coal gasification using multiple regression analysis

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International Journal of Coal science & Technology 2015年第4期2卷 318-324页

作者： Mehdi Najafi seyed Mohammad Esmaiel jalali reza KhaloKakaie Farrokh Forouhandeh Department of Mining and Metallurgical Engineering YazdUniversity Safayieh P.O. Box 89195-741 Yazd Iran Faculty of Mining Engineering Petroleum and GeophysicsShahrood University Shahrud Iran Department of Mathematics Shahrood University ShahrudIran

During underground coal gasification （UCG）, whereby coal is converted to syngas in situ, a cavity is formed in the coal seam. The cavity growth rate （CGR） or the moving rate of the gasification face is affected by controllable （operation pressure, gasification time, geometry of UCG panel） and uncontrollable （coal seam properties） factors. The CGR is usually predicted by mathematical models and laboratory experiments, which are time consuming, cumbersome and expensive. In this paper, a new simple model for CGR is developed using non-linear regression analysis, based on data from 1 l UCG field trials. The empirical model compares satisfactorily with Perkins model and can reliably predict CGR.

关键词： Underground coal gasification (UCG) - Cavity growth rate . Multiple regression analysis ~ Empirical model

Multivariate statistical Analysis of Potassium status in Agricultural soils in Hamadan,Western Iran

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Pedosphere 2010年第3期20卷 293-303页

作者： M. jalali Department of soil science College of AgricultureBu-Ali Sina University

Multivariate statistical technique was used to determine the potassium （K＋） status and to assess soil fertility and K leaching potential in some calcareous soils. Water-soluble K＋（H20-K） and ammonium acetate-extractable K＋（NHaOAc- K） ranged from 0.019 to 0.590 （mean value 0.095） and 0.390 to 3.320 （mean value 0.954） cmolc kg-1, respectively. The nitric acid-extractable K＋（HNO3-K） varied from 1.03 to 13.63 （mean value 5.37） cmolc kg-1. The proportion of H20-K ranged from 0.34% to 14.8% of HNO3-K, and 2.2% to 53.2% of NHaOAc-K. The proportion of NHaOAc-K ranged from 5.8% to 80% of HNO3-K （mean value 23% of HNOa-K）. The tendency of the soil to lose K＋ by leaching was examined by determining K＋-Ca2＋ exchange isotherms. The soils mostly had moderate to high values of K＋ sorption capacity, ranging from 10% to 58% （mean value 28%） of added K＋. The Gapon coefficient varied widely from 1.1 to 12.0 （L mol-1）-1/2. Clay minerals were dominated by illite, smectites and vermiculite with small amounts of kaolinite. Principal component analysis （PCA） showed that the first four components accounted for 27.7%, 21.4%, 13.8%, and 8.9% of total variation, respectively. The non-hierarchical cluster analysis （k-means clustering） grouped 75 sampling sites into six clusters, based on the similarity of soil quality characteristics. The results suggested that such classes could form a basis for variable-rate application to maintain an adequate K＋ status for crop production and to reduce potential K＋ loss from soil by leaching.

关键词： adsorption Gapon coefficient leaching non-exchangeable potassium principal component analysis

Numerical Modeling of the solidification Phase Change in a Pipe and Evaluation of the Effect of Boundary Conditions

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Journal of Thermal science 2010年第5期19卷 419-424页

作者： A.jalali A.F.Najafi Department of Energy Engineering Power and Water University of Technology

A numerical solution to a two-dimensional model of flow and transient heat transfer involving solidification in a pipe has been *** the temperature of pipe wall is below the freezing point of fluid,phase change of flowing fluid and the influence of different boundary condition,such as pipe wall temperature,initial temperature and inlet velocity has been taken into *** it has been investigated to elicit proper non-dimensional numbers to show the solidification proceeding *** comparing the two acceptable inlet conditions,show distinctions between velocity inlet and pressure inlet boundary condition in such problems,which affect the whole freezing process.

关键词： Phase change solidification Heat transfer