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Energy Engineering 2024年第6期121卷 1381-1401页

作者： Razieh Keshavarzi Mehdi jahangiri Energy and Environment Research Center Shahrekord BranchIslamic Azad UniversityShahrekordIran

Nowadays,the use of renewable energies,especially wind,solar,and biomass,is essential as an effective solution to address global environmental and economic ***,the current study examines the energy-economic-environmental analysis of off-grid electricity generation systems using solar panels,wind turbines,and biomass generators in various weather conditions in *** over 25 years were conducted using HOMER v2.81 software,aiming to determine the potential of each region and find the lowest cost of electricity production per *** the end,to identify the most suitable location,the Technique for Order Preference by Similarity to Ideal Solution(TOPSIS)method was employed to rank different stations based on simulation output parameters and some other influential *** the evaluation of various parameters,the stations in Yazd,Marand,and Dezful achieved the best results,while the stations in Ramsar,Shahrekord,and Gonbad presented the least favorable *** Yazd,the wind turbine is an economic priority,and a 100 kW wind turbine is utilized in the optimal *** Yazd,where the simultaneous use of renewable energies is most prominent,the lowest pollutant production occurred with a quantity of 1174 kg/*** energy losses are highest in Jask station and lowest in Yazd.

关键词： Multi-criteria decision-making method residential scale biomass generators normalize weight

Decentralized Adaptive Control for a Class of Large-Scale Nonlinear Systems with Unknown Interactions

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Decentralized Adaptive Control for a Class of Large-Scale No...

Dynamics of a rotating ring-stiffened sandwich conical shell with an auxetic honeycomb core

2010 Chinese Control and Decision Conference

作者： Bahram Karimi fatemeh jahangiri Mohammad B.Menhaj Iman Saboori Center of Advanced Computational Intelligence Amirkabir University of TechnologyTehranIran Amirkabir University of Technology TehranIran

＜正＞This paper presents a decentralized adaptive controller for a class of large-scale nonlinear systems with unknown subsystems and interactions.A direct adaptive controller is devised based on Lyapunov stability analysis so that the stability of the closed loop system is guaranteed by introducing a suitably driven adaptive *** adaptive controller proposed in this paper can guarantee the stability of the closed-loop system without knowing the sign of the controller *** show the effectiveness of the proposed decentralized adaptive controller,a nonlinear system is chosen as a case *** results are very promising.

关键词： Adaptive control and Decentralized nonlinear system

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 963-982页

作者： S.jahangiri A.GHORBANPOUR ARANI Z.KHODDAMI MARAGHI Department of Solid Mechanics Faculty of Mechanical EngineeringUniversity of KashanKashan ***Iran Faculty of Engineering Mahallat Institute of Higher EducationMahallat ***Iran

The free vibration analysis of a rotating sandwich conical shell with a reentrant auxetic honeycomb core and homogenous isotropic face layers reinforced with a ring support is *** shell is modeled utilizing the first-order shear deformation theory(FSDT)incorporating the relative,centripetal,and Coriolis accelerations alongside the initial hoop tension created by the *** governing equations,compatibility conditions,and boundary conditions are attained using Hamilton’s *** trigonometric functions,an analytical solution is derived in the circumferential direction,and a numerical one is presented in the meridional direction via the differential quadrature method(DQM).The effects of various factors on the critical rotational speeds and forward and backward frequencies of the shell are *** present work is the first theoretical work regarding the dynamic analysis of a rotating sandwich conical shell with an auxetic honeycomb core strengthened with a ring support.

关键词： free vibration conical shell rotating shell ring support auxetic honeycomb

Period–Luminosity Relationship forδScuti Stars Revisited

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Research in Astronomy and Astrophysics 2024年第2期24卷 138-143页

作者： Atila Poro S.Javad Jafarzadeh Roghaye Harzandjadidi Mohammad Madani Elnaz Bozorgzadeh Esfandiar jahangiri Ahmad Sarostad Ailar Alizadehsabegh Maryam Hadizadeh Mohammad EsmaeiliVakilabadi The Raderon AI Laboratory Astronomy DepartmentBurnabyBCCanada Department of Physics University of Texas at Dallas800 W.Campbell Rd.RichardsonTX 75080USA Department of Theoretical Physics and Astrophysics University of ZanjanZanjanIran Independent researcher TehranIran Department of Electronics and Telecommunications Politecnico Di TorinoTurinItaly Independent researcher IsfahanIran Yazd Desert Night Sky Astronomy Institute YazdIran Department of Photonics Tabriz UniversityTabrizIran Khayyam Astronomy Association FarsFasaIran

The Gaia DR3 parallax approach was used to estimate the absolute parameters of 2375δScuti stars from the ASAS *** selected stars have a variety of observational characteristics,with a higher than 80%probability of beingδScuti *** have displayed all the stars in the Hertzsprung-Russell diagram along with theδScuti instability strip,the Zero Age Main Sequence and the Terminal Age Main ***,we determined which fundamental and overtone modes each star belongs to using pulsation constant(Q)*** addition,we evaluated the parameters in the Q calculation equation using three machine learning methods,which showed that surface gravity and temperature have the greatest effect on its *** Period-Luminosity(P-L)relationship of theδScuti stars was also ***,using least squares linear regression,we made four linear fits for fundamental and overtone modes and updated their relationships.

关键词： stars variables delta Scuti--stars fundamental parameters-methods data analysis

Cloud service selection using cloud service brokers: approaches and challenges

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Frontiers of Computer Science 2019年第3期13卷 599-617页

作者： Meysam VAKILI Neda jahangiri Mohsen SHARIFI Department of Computer Engineering University of Science and Culture Tehran 14619-68151 Iran School of Computer Engineering Iran University of Science and Technology Tehran 16846-13114 Iran

Cloud computing users are faced with a wide variety of services to choose from. Consequently, a number of cloud service brokers (CSBs) have emerged to help users in their service selection process. This paper reviews the recent approaches that have been introduced and used for cloud service brokerage and discusses their challenges accordingly. We propose a set of attributes for a CSB to be considered effective. DifFerent CSBs' approaches are classified as either single service or multiple service models. The CSBs are then assessed, analyzed, and compared with respect to the proposed set of attributes. Based on our studies, CSBs with multiple service models that support more of the proposed effective CSB attributes have wider application in cloud computing environments.

关键词： cloud service broker (CSB) cloud service selection cloud computing quality of service (QoS)

OrthoGNC:A Software for Accurate Identi?cation of Orthologs Based on Gene Neighborhood Conservation

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Genomics, Proteomics & Bioinformatics 2017年第6期15卷 361-370页

作者： Soheil jahangiri-Tazehkand Limsoon Wong Changiz Eslahchi Department of Computer Science Shahid Beheshti UniversityTehran ***Iran School of Computing National University of SingaporeSingapore 117417Singapore

Orthology relations can be used to transfer annotations from one gene （or protein） to another. Hence, detecting orthology relations has become an important task in the post-genomic era. Various genomic events, such as duplication and horizontal gene transfer, can cause erroneous assignment of orthology relations. In closely-related species, gene neighborhood information can be used to resolve many ambiguities in orthology inference. Here we present OrthoGNC, a software for accurately predicting pairwise orthology relations based on gene neighborhood conservation. Analyses on simulated and real data reveal the high accuracy of OrthoGNC. In addition to orthol- ogy detection, OrthoGNC can be employed to investigate the conservation of genomic context among potential orthologs detected by other methods. OrthoGNC is freely available online at http：//***/softwares/orthognc and http：//***/orthoGNC.

关键词： Orthotogy Homology Gene neighborhood conser-vation Genomic context Comparative genomics

Investigation on the dissolution of η phase in a cast Ni-based superalloy

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International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 42-48页

作者： M.R. jahangiri H. Arabi S.M.A. Boutorabi School of Metallurgy and Materials Engineering Iran University of Science and Technology Metallurgy Department Niroo Research Institute Center of Excellence for Advanced Materials & Processing Iran University of Science and Technology

The dissolution behavior of rI phase has been investigated in a cast Ni-based superalloy. The results showed that the platelets and blocks of η phase were formed within the interdendritic regions of the microstructure. Applying standard solution annealing at 1150-1160℃ for a period of 4 h did not result in the complete dissolution of η phase. For the complete dissolution of η phase without residual incipient melting, a 2-step solution annealing has been recommended. After dissolution at high tem- peratures, the TI phase transforms to two MC-type carbides： one is enriched in Ti, Nb, and Ta, and the other is of （Zr,Ti）C type.

关键词： superalloys nickel alloys phase transitions dissolution heat treatment carbides

Tameness and Artinianness of Graded Generalized Local Cohomology Modules

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Algebra Colloquium 2015年第1期22卷 131-146页

作者： M. jahangiri N. Shirmohammadi Sh. Tahamtan Faculty of Mathematical sciences and Computer Kharazmi University rlbhran Iran School of Mathematics Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5749 Tehran Iran School of Mathematics Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5749 rlbhran Iran Department of Mathematics University of Tabriz Tabriz Iran Islamic Azad University Borujerd Branch Boroujerd Iran

Let R = ⊙n〉0 Rn be a standard graded ring, a ∩ ⊙n〉0 Rn an ideal of R, and M, N two finitely generated graded R-modules. This paper studies the homogeneous components of graded generalized local cohomology modules. We show that for any i 〉 0, the n-th graded component Hiα（M, N）n of the i-th generalized local cohomology module of M and N with respect to a vanishes for all n 〉〉 0. Some sufficient conditions are pro- posed to satisfy the equality sup{end（Hiα （M, N）） [ i _〉 0} = sup{end（HiR＋（M, N））｜ i 〉 0}. Also, some sufficient conditions are proposed for the tameness of Hiα（M, N） such that i = fRα＋（M,N） or i = cdα（M,g）, where fRα＋（M,N） and cdα（M,g） denote the R＋- finiteness dimension and the cohomological dimension of M and N with respect to a, respectively. Finally, we consider the Artinian property of some submodules and quotient modules of Hjα（M, N）, where j is the first or last non-minimax level of Hiα（M, N）.

关键词： graded rings and modules generalized local cohomology Artinian modules,tameness

Kinetics of(TBAF+CO2)semi-clathrate hydrate formation in the presence and absence of SDS

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Petroleum Science 2018年第2期15卷 375-384页

作者： A.Mohammadi M.Pakzad A.H.Mohammadi A.jahangiri Department of Chemical Engineering University of BojnordBojnordIran Department of Chemical Engineering Omidiyeh BranchIslamic Azad UniversityOmidiyehIran Institut de Recherche en Genie Chimique et Petrolier(IRGCP) Paris CedexFrance Thermodynamics Research Unit School of EngineeringUniversity of KwaZulu-NatalHoward College CampusKing George V AvenueDurban 4041South Africa Faculty of Engineering Shahrekord UniversityShahrekordIran

In this communication, the impacts of adding SDS （sodium dodecyl sulfate）, TBAF （tetra-n-butylammonlum tluorloe） ano the mixture of SDS ＋ TBAF on the main kinetic parameters of CO2 hydrate formation （induction time, the quantity and rate of gas uptake, and storage capacity） were investigated. The tests were performed under stirring conditions at T = 5 ℃ and P = 3.8 MPa in a 169 cm3 batch reactor. The results show that adding SDS with a concentration of 400 ppm, TBAF with a concentration of l-5 wt%, and the mixture of SDS ＋ TBAF, would increase the storage capacity of CO2 hydrate and the quantity of gas uptake, and decrease the induction time of hydrate formation process. The addition of 5 wt% of TBAF and 400 ppm of SDS would increase the CO2 hydrate storage capacity by 86.1% and 81.6%, respectively, compared to pure water. Investigation of the impact of SDS, TBAF and their mixture on the rate of gas uptake indicates that the mixture of SDS ＋ TBAF does not have a significant effect on the rate of gas uptake during hydrate formation process.

关键词： Semi-clathrate hydrate Gas hydrate Kinetics CO2 SDS TBAF

Antimicrobial resistance patterns and prevalence of integrons in Shigella species isolated from children with diarrhea in southwest Iran

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Asian Pacific Journal of Tropical Medicine 2021年第2期14卷 78-82页

作者： Nabi Jomehzadeh Maryam Afzali Khadijeh Ahmadi Shokrollah Salmanzadeh Fateme jahangiri Mehr Abadan Faculty of Medical Sciences AbadanIran Infectious and Tropical Diseases Research Center Health Research InstitueAhvaz Jundishapur University of Medical SciencesAhvazIran Biostatistics and Epidemiology Department Ahvaz Jundishapur University of Medical SciencesAhvazIran

Objective:To investigate the antimicrobial resistance patterns and prevalence of integrons in Shigella species isolated from children with diarrhea in southwest ***:In this study,1530 stool samples were collected from children under 15 years with diarrhea referred to teaching hospitals in Ahvaz and Abadan,southwest *** *** identified by standard biochemical tests and *** antibiotic resistance pattern of all Shigella isolates was determined by the disk diffusion method and minimum inhibitory concentration(MIC)by ***:Of 1530 stool samples,91(5.9%,91/1530)were positive for Shigella *** most common Shigella isolates were Shigella flexneri 47(51.6%,47/1530).Antibiotic susceptibility tests showed that the highest antibiotic resistance was related to trimethoprimsulfamethoxazole(87.9%,80/91)and ampicillin(86.8%,79/91).Multiplex PCR results revealed that 56%and 86.9%of Shigella isolates carried integron classⅠand integron classⅡgenes,*** of the isolates included the integron classⅢ***:The high prevalence of multi-drug resistance in Shigella isolates in our area increases the concerns about dissemination of the antibiotic-resistant isolates in this bacterium.

关键词： Integrons Shigella spp. Multi-drug resistance PCR