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Structural, electronic, and optical studies of chalcogenides stannite Cu2CdSnX4（X=S, Se, and Te）: insights from the DFT study

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Optoelectronics Letters 2025年第2期21卷 69-76页

作者： Jamal GUERROUM Mohamed AL-HATTAB Lhoucine MOUDOU Khalid rahmani Youssef LACHTIOUI Omar BAJJOU Laboratory of Engineering in Chemistry and Physics of Matter Faculty of Sciences and Technics Sultan Moulay Slimane University Ecole normale Supérieure Mohammed V University in Rabat College of Graduate Studies University of South Africa

In this paper,we have calculated the structural,electronic,and optical properties of chalcogenide stannite Cu2CdSnX4（X=S,Se,Te） *** calculations are based on the density functional theory （DFT） method and are performed using the Cambridge sequential total energy package （CASTEP） code included in the Biovia Material Studio 20 *** optical properties have been studied in a domain that extends energetically from 10 meV to 40 *** results show that Cu2CdSnX4（X=S,Se,Te） stannite exhibits absorption in the visible region,the refractive index decreases with increasing energy,and the refractive index values are n=3.2,3.73 and 3.75 for Cu2CdSnS4,Cu2CdSnSe4and Cu2CdSnTe4,*** show also high conductivity,which implies that this material is promising for solar *** results argue in favor of the use of these materials in various potential *** density of state,band structures,and structural properties of Cu2CdSnX4（X=S,Se,and Te） stannite are also studied in this work.

关键词： Refractive index

Smart Bubble Sort:A novel and Dynamic Variant of Bubble Sort Algorithm

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Computers, Materials & Continua 2022年第6期71卷 4895-4913页

作者： Mohammad Khalid Imam rahmani College of Computing and Informatics Saudi Electronic UniversityRiyadhSaudi Arabia

In the present era,a very huge volume of data is being stored in online and offline *** houses,research,medical as well as healthcare organizations,and academic institutions store data in databases and their subsequent retrievals are performed for further *** the required data from a given database within the minimum possible time is one of the key factors in achieving the best possible performance of any computer-based *** the data is already sorted,finding or searching is comparatively *** real-life scenarios,the data collected from different sources may not be in sorted *** algorithms are required to arrange the data in some order in the least possible *** this paper,I propose an intelligent approach towards designing a smart variant of the bubble sort algorithm.I call it Smart Bubble sort that exhibits dynamic footprint:The capability of adapting itself from the average-case to the best-case *** is an in-place sorting algorithm and its best-case time complexity isΩ(n).It is linear and better than bubble sort,selection sort,and merge *** averagecase and worst-case analyses,the complexity estimates are based on its static footprint *** complexity in worst-case is O(n2)and in average-case isΘ(n^(2)).Smart Bubble sort is capable of adapting itself to the best-case scenario from the average-case scenario at any subsequent stages due to its dynamic and intelligent *** Smart Bubble sort outperforms bubble sort,selection sort,and merge sort in the best-case scenario whereas it outperforms bubble sort in the average-case scenario.

关键词： Sorting algorithms smart bubble sort footprint dynamic footprint time complexity asymptotic analysis

Vibration analysis of steel structures including the effect of panel zone flexibility based on the energy method

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Earthquake Engineering and Engineering Vibration 2013年第4期12卷 587-598页

作者： Hasan Ghasemzadeh Hamid rahmani Samani Masoud Mirtaheri Department of Civil Engineering K.N.Toosi University of Technology Department of Civil Engineering Islamic Azad University–Pardis Branch

new approximate formulas are proposed to determine the natural frequencies of structures considering the effects of panel zone flexibility and soil-structure interaction. Several structures with various earthquake resisting systems are idealized as prismatic cantilever flexural-shear beams. Floor masses are considered as lumped masses at each story level and masses of columns are evenly distributed along the cantilever beam. Soil-structure interaction is considered as axial and rotational springs, whose potential energy are formulated and incorporated into overall potential energy of the structure. Subsequently, natural frequency equations are derived on the basis of energy conservation principle. The effect of axial forces on natural frequency is also considered in the proposed formulas. Using the method presented in this study, natural frequencies are computed using a simplified method with no complex numerical modeling. The proposed formulas are verified via experimental and numerical methods. Close agreement between the results from these three approaches are observed. Furthermore, the effects of panel zone flexibility, continuity plates and doubler plates on the natural frequencies of buildings are investigated.

关键词： free vibration energy method panel zone soil-structure interaction flexural-shear beams

Application of n-thiocyanatosuccinimide as a reagent for the facile conversion of epoxides into thiocyanohydrines

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Chinese Chemical Letters 2011年第1期22卷 21-24页

作者： Babak Mokhtari Roya Azadi Samira rahmani-nezhad Department of Chemistry College of ScienceShahid Chamran UniversityAhvaz 61357-43337Iran

The use of in situ generated n-thiocyanatosuccinimide with nH4SCn offers an efficient reagent system for the conversion of epoxides into their corresponding thiocyanohydrines in good to high yields. The major advantages of this method are as follows： use of cheap reagent, high regioselectivity, simple availability of reagent, ease of workup of the reaction.

关键词： n-Thiocyanatosuccinimide Ring opening Epoxide Thiocyanohydrin

Light-Weighted Decision Support Framework for Selecting Cloud Service Providers

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Computers, Materials & Continua 2023年第2期74卷 4293-4317页

作者： Abdulmajeed Aljuhani Abdulaziz Alhubaishy Mohammad Khalid Imam rahmani Ahmad A.Alzahrani College of Computer Science and Engineering Taibah UniversityMedina41411Saudi Arabia College of Computing and Informatics Saudi Electronic UniversityRiyadh11673Saudi Arabia Computer Science Common First Year DeanshipUmm-AlQura UniversityMakkahMKSaudi Arabia

Multi-criteria decision making(MCDM)is a technique used to achieve better outcomes for some complex business-related problems,whereby the selection of the best alternative can be made in as many cases as *** paper proposes a model,the multi-criteria decision support method,that allows both service providers and consumers to maximize their profits while preserving the best matching process for resource allocation and task *** increasing number of service providers with different service provision capabilities creates an issue for consumers seeking to select the best service *** consumer seeks a service provider based on various preferences,such as price,service quality,and time to complete the *** the literature,the problem is viewed from different perspectives,such as investigating how to enhance task scheduling and the resource allocation process,improve consumers’trust,and deal with network *** paper offers a novel model that considers the preferences of both service providers and consumers to find the best available service provider for each ***,the model adopts the best-worst method(BWM)to gather and prioritize tasks based on consumers’and service providers’***,the model calculates and matches similarities between the sets of tasks from the consumer’s side with the sets of tasks from the provider’s side to select the best service provider for each consumer using the two proposed *** complexity of the two algorithms is found to be O(n3).

关键词： Best worst method BWM cloud service provider decision support methods

Design of experiments for determination of influence of different parameters on mechanical properties of semi-solid extruded parts

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中国有色金属学会会刊：英文版 2010年第S3期20卷 794-797页

作者： V.POUVAFAR S.A.SADOUGH F.HOSSEInJ M.R.rahmani Center of Excellence in Solid Mechanics Mechanical Engineering DepartmentAmirKabir University of Technology(Tehran Polytechnic)

near net-shape production of complex parts with higher mechanical properties is one of the most important final goals of the recent researches on the semi-solid *** the knowledge of the influence of every parameter on the properties of final parts is the key in the production of high quality complex *** these parameters forming temperature and velocity,and reheating and holding times have the greatest effects on the final mechanical properties of the *** influence of the parameters of non-dendritic billet production,forming speed,temperature and holding time on the properties of semi-solid extruded parts were ***-slope method was employed in order to produce non-dendritic *** material used was A356 aluminum *** the number of the parameters influencing the final properties of the parts was high(these parameters include:cooling slope angle,ram velocity,temperature and holding time),the final number of the experiments required would be n4,in which n is the number of the states of the parameters(5 in our case).In order to reduce this amount,design of experiments Tachuchi method was employed(design L25).Using this method the number of required experiments was reduced to *** the experiments the prepared semi-solid samples were extruded under isothermal condition and with 5 different ram *** tensile tests were conducted on the extruded parts and the mechanical properties of the parts were *** obtained results analyzed with MiniTab and the influence of each of the parameters and also the percentage of its influence were *** an optimum region for the parameters was *** temperature,ram speed,slope angle and holding time have more important effects descendingly.

关键词： semi-solid extrusion Tachuchi method A356 alloy mechanical properties

AFAR:adaptive fuzzy ant-based routing for communication networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1666-1675页

作者： Seyed Javad MIRABEDInI Mohammad TESHnEHLAB M.H.SHEnASA Ali MOVAGHAR Amir Masoud rahmani Engineering Department Science and Research BranchIslamic Azad UniversityTehranIran Control Department K.N.Toosi Technology UniversityTehranIran Computer Department Sharif UniversitTehranIran

We propose a novel approach called adaptive fuzzy ant-based routing (AFAR), where a group of intelligent agents (or ants) builds paths between a pair of nodes, exploring the network concurrently and exchanging obtained information to up-date the routing tables. Routing decisions can be made by the fuzzy logic technique based on local information about the current network state and the knowledge constructed by a previous set of behaviors of other agents. The fuzzy logic technique allows multiple constraints such as path delay and path utilization to be considered in a simple and intuitive way. Simulation tests show that AFAR outperforms OSPF, Antnet and ASR, three of the currently most important state-of-the-art algorithms, in terms of end-to-end delay, packet delivery, and packet drop ratio. AFAR is a promising alternative for routing of data in next generation networks.

关键词： Adaptive fuzzy routing algorithm Swarm intelligence Routing table Communication network Packet delay,Throughput

Petrology and geochemistry of mafic and ultramafic cumulate rocks from the eastern part of the Sabzevar ophiolite(nE Iran): Implications for their petrogenesis and tectonic setting

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Geoscience Frontiers 2020年第6期11卷 2347-2364页

作者： Fatemeh rahmani Mohamad Ali Mackizadeh Moussa noghreyan Claudio Marchesi Carlos J.Garrido Department of Geology Faculty of SciencesUniversity of IsfahanP.O.Box:81746-73441IsfahanIran Instituto Andaluz de Ciencias de La Tierra(IACT) CSIC-Universidad de GranadaAvenida de Las Palmeras 418100ArmillaGranadaSpain Departamento de Mineralogía y Petrología Facultad de CienciasUniversidad de GranadaAvenida Fuentenueva s/n18002GranadaSpain

The Late Cretaceous Sabzevar ophiolite represents one of the largest and most complete fragments of Tethyan oceanic lithosphere in the nE *** is mainly composed of serpentinized mantle peridotites slices;nonetheless,minor tectonic slices of all crustal sequence constituents are observed in this *** crustal sequence contains a well-developed ultramafic and mafic cumulates section,comprising plagioclase-bearing wehrlite,olivine clinopyroxenite,olivine gabbronorite,gabbronorite,amphibole gabbronorite and quartz gabbronorite with adcumulate,mesocumulate,heteradcumulate and orthocumulate *** crystallization order for these rocks is olivine±chromian spinel→clinopyroxene→plagioclase→orthopyroxene→*** presence of primary magmatic amphiboles in the cumulate rocks shows that the parent magma evolved under hydrous ***,the studied rock units are characterized by low TiO2(0.18-0.57 wt.%),P2 O5(nd total alkali contents(0.12-3.04 wt.%).They indicate fractionated trends in the chondrite-normalized rare earth element(REE)plots and multi-element diagrams(spider diagrams).The general trend of the spider diagrams exhibit slight enrichment in large ion lithophile elements(LILEs)relative to high field strength elements(HFSEs)and positive anomalies in Sr,Pb and Eu and negative anomalies in Zr and nb relative to the adjacent *** REE plots of these rocks display increasing trend from La to Sm,positive Eu anomaly(Eu/Eu*=1.06-1.54)and an almost flat pattern from medium REE(MREE)to heavy REE(HREE)region[(Gd/Yb)n=1-1.17].Moreover,clinopyroxenes from the cumulate rocks have low REE contents and show marked depletion in light REE(LREE)compared to MREE and HREE[(La/Sm)n=0.10-0.27 and(La/Yb)n=0.08-0.22].The composition of calculated melts in equilibrium with the clinopyroxenes from less evolved cumulate samples are closely similar to island arc tholeiitic(IAT)*** mineralogy,geochemical features

关键词： Petrology Geochemistry Cumulate rocks Sabzevar ophiolite Supra-subduction zone Iran

Rice (Oryza sativa L.) nutrient management using mycorrhizal fungi and endophytic Herbaspirillum seropedicae

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Journal of Integrative Agriculture 2016年第6期15卷 1385-1394页

作者： H Hoseinzade M R Ardakani A Shahdi H Asadi rahmani G noormohammadi M Miransari Department of Agronomy Science and Research Branch Islamic Azad University Tehran *** Iran Department of Agronomy Islamic Azad University Karaj branch 86319615 Iran Rice Research Institute of Iran Rasht 43114843 Iran Soil and Water Research Institute Karaj 394923973 Iran Department of Book&Article Abtin Berkeh L td Company Isfahan *** Iran

Integrated nutrient management with biological and chemical fertilizers can improve rice （Oryza safiva L.） productivity, bio-fortification, soil health and fertility. Accordingly, this study was planned to evaluate the combined effects of biological fertilizers including arbuscular mycorrhizal （AM） fungi （Glomus mosseae） and free-living nitrogen-fixing bacteria （Herbaspi- rillum seropedicae）, as well as chemical fertilizers on the yield and nutrient contents of wetland rice under field conditions. Seedlings were inoculated with AM fungi and the bacteria in the nursery and were then transplanted to the field. The experi- ment was carried out as a split factorial design with three replicates. Treatments included three rates of nitrogen （n 1, n2 and n3） and phosphorous （P1, P2 and P3） fertilizers （100, 75 and 50% of the optimum level） in the main plots and mycorrhizal and bacterial treatments in the sub plots. The total of urea （g） used per plot was equal to n1=200, n2=150 and n3=100 at three different growth stages （seeding, tillering and heading） and the total of P （g） per plot used once at seeding using triple super phosphate including P1 =16, P2=13 and P3=10. Plant growth and yield as well as the concentration of nitrogen （n）, phosphorous （P）, potassium （K）, iron （Fe）, and zinc （Zn） were measured in the soil, straw and grains. n-fertilizer and biological fertilizers had significant effects on root, shoot and grain yield of rice, however, P-fertilizer just significantly affected root and shoot dry weights. Interestingly, analyses of variance indicated that biological fertilization significantly affected all the experimental treatments except straw n. AM fungi, n1 and P1 resulted in the highest rate of rice growth and yield. The interactions of chemical and biological fertilization resulted in significant effects on grain Zn, Fe, P, and n as well as soil Fe, K and n. The highest rate of grain nutrient uptake was resulted by the combined use of biological fertilizatio

关键词： bio-fortification nutrient management yield biological fertilizer rice (Oryza sativa L.)