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Th. fractional features of a h.rmonic oscillator with.position-dependent mass

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Communications in Th.oretical Ph.sics 2020年第5期72卷 13-20页

作者： Dumitru Baleanu Amin Jajarmi Samaneh.Sadat sajjadi h.Asad Department of Math.matics Faculty of Arts and SciencesCankaya University06530 AnkaraTurkey Institute of Space Sciences PO Box MG–23R 76900Magurele–BucharestRomania Department of Electrical Engineering University of BojnordPO Box 94531–1339BojnordIran Department of Electrical and Computer Engineering Hakim Sabzevari UniversitySabzevarIran Palestine Tech.ical University College of Arts and SciencesDepartment of PhysicsPO Box 7 TulkarmPalestine

In th.s study,a h.rmonic oscillator with.position-dependent mass is ***,as an introduction,we give a full description of th. system by constructing its classical Lagrangian;th.reupon,we derive th. related classical equations of motion such.as th. classical Euler–Lagrange ***,we fractionalize th. classical Lagrangian of th. system,and th.n we obtain th. corresponding fractional Euler–Lagrange equations(FELEs).As a final step,we give th. numerical simulations corresponding to th. FELEs with.n different fractional *** results based on th. Caputo and th. Atangana-Baleanu-Caputo(ABC)fractional derivatives are given to verify th. th.oretical analysis.

关键词： position-dependent mass h.rmonic oscillator Euler–Lagrange equations fractional derivative

Integrated ozone–ph.to–Fenton process for th. removal of pollutant from industrial wastewater

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Ch.nese Journal of Ch.mical Engineering 2017年第4期25卷 516-522页

作者： P.Asaith.mbi Bah.rak sajjadi Abdul Raman Abdul Aziz Department of Ch.mical Engineering Faculty of EngineeringUniversity of Malaya50603Malaysia

Th. use of h.brid advanced oxidation processes(AOPs) for th. removal of pollutants from industrial effluents h.s been extensively studied in recent literature. Th. aim of th.s study is to compare th. performance of th. ph.to,Fenton, ph.to-Fenton and ozone–ph.to–Fenton processes in terms of color removal and ch.mical oxygen demand(COD) removal of distillery industrial effluent togeth.r with.th. associated electrical energy per order. It was observed from th. experimental results th.t th. O_3/UV/Fe^(2 +)/h.2O_2 process yielded a 100% color and95.50% COD removals with.electrical energy per order of 0.015 k W·h.m^(-3) compared to all oth.r combinations of th. AOPs. Th. effects of various operating parameters such.as h.2O_2 and Fe^(2+) concentration, effluent ph. COD concentration and UV power on th. removal of color, COD and electrical energy per order for th. ozone–ph.to–Fenton process was critically studied and reported. Th. color and COD removals were analyzed using a UV/Vis spectrometer and closed reflux meth.d.

关键词： Fenton ph.to ozone wastewater pollutant effluent AOPs h.droxyl inorganic irradiation

Strength.ning of aluminium alloy 7005 th.ough.imposition of severe plastic deformation supplemented by different ageing treatments

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Transactions of Nonferrous Metals Society of Ch.na 2021年第10期31卷 2909-2921页

作者： R.BAKh.h. M.h.FARSh.DI S.A.sajjadi Department of Materials Science and Metallurgical Engineering Ferdowsi University of MashhadAzadi SquareMashhadIran

Strength.ning of aluminium alloys 7xxx th.ough.th. imposition of severe plastic deformation supplemented by ageing treatments is a ch.llenge due to th. limited workability of th.se alloys in cold deformation *** study aims to compreh.nsively investigate th. strength.ning of aluminium alloy 7005 th.ough.th. imposition of severe plastic deformation supplemented by two different ageing treatments:pre-deformation artificial ageing or postdeformation natural *** th.s purpose,microstructure evolutions of th. alloy processed th.ough.mentioned procedures were studied using X-ray diffraction and scanning electron microscopy wh.le th. alloy strength.ning was evaluated using Vickers h.rdness *** sh.w th.t a superlative strength.ning is obtained th.ough.th. imposition of severe plastic deformation supplemented by post-deformation natural *** instance,th. yield strength.of th. alloy increases to more th.n 400 MPa,about one-th.rd greater th.n th. counterpart amount after th. usual T6 *** superlative strength.mainly occurs due to refinement of grains,an increase of dislocation density and an increase of volume fraction of th. precipitates th.t appeared during natural *** th. applied models,it is inferred th.t th. increase of volume fraction of precipitates th.t appeared during natural ageing h.s a determinative role in th. strength.ning of th. alloy.

关键词： severe plastic deformation strength precipitation ageing treatment aluminum alloy 7005

Strength.ning of aluminium alloy 7005 th.ough.th. imposition of severe plastic deformation supplemented by different ageing treatments

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Transactions of Nonferrous Metals Society of Ch.na 2021年

作者： R.Bakh.h. M.h.Farsh.di S.A.sajjadi Department of Materials Science and Metallurgical Engineering， Ferdowsi University of Mash.ad

Strength.ning of aluminium alloys 7xxx th.ough.th. imposition of severe plastic deformation supplemented by ageing treatments is a ch.llenge due to th. limited workability of th.se alloys in cold deformation regimes. Th.s study aims to compreh.nsively investigate th. strength.ning of aluminium alloy 7005 th.ough.th. imposition of severe plastic deformation supplemented by two different ageing treatments: pre-deformation artificial ageing or post-deformation natural ageing. For th.s purpose， microstructure evolutions of th. alloy processed th.ough.mentioned procedures are studied using X-ray diffraction experiment and scanning electron microscopy wh.le th. alloy strength.ning is evaluated using Vickers h.rdness measurement. Results sh.w th.t a superlative strength.ning is obtained th.ough.th. imposition of severe plastic deformation supplemented by post-deformation natural ageing. For instance， th. yield strength.of th. alloy increases to more th.n 400 MPa， about one-th.rd greater th.n th. counterpart amount after th. usual T6 treatment. Th.s superlative strength.mainly occurs due to refinement of grains， an increase of dislocation density and an increase of volume fraction of th. precipitates th.t appeared during natural ageing. Considering th. applied models， it is inferred th.t th. increase of volume fraction of precipitates th.t appeared during natural ageing h.s a determinative role in th. strength.ning of th. alloy.

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Microstructure and mech.nical properties of extruded Al/Al_2O_3 composites fabricated by stir-casting process

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Transactions of Nonferrous Metals Society of Ch.na 2013年第5期23卷 1262-1268页

作者： h.R.EZATPOUR1 M.TORABIPARIZI S.A.sajjadi Department of Materials Science and Metallurgical Engineering Engineering FacultyFerdowsi University of Mashhad Department of Materials Science and Metallurgical Engineering Engineering FacultySemnan University of Semnan

A novel two step mixing meth.d including injection of particles into th. melt by inert gas and stirring was used to prepare aluminum matrix composites （AMCs） reinforced with.Al2O3 particles. Different mass fractions of micro alumina particles were injected into th. melt under stirring speed of 300 r/min. Th.n th. samples were extruded with.ratios of 1.77 or 1.56. Th. microstructure observation sh.wed th.t application of th. injection and extrusion processes led to a uniform distribution of particles in th. matrix. Th. density measurements sh.wed th.t th. porosity in th. composites increased with.increasing th. mass fraction of Al2O3 and stirring speed and decreased by extrusion process. h.rdness, yield and ultimate tensile strength. of th. extruded composites increased with.increasing th. particle mass fraction to 7%, wh.le for th. composites with.ut extrusion th.y increased with.particle mass fraction to 5%.

关键词： Al/Al2O3 composite stir-casting extrusion microstructure mech.nical properties

Enh.nced degradation of organic contaminants using catalytic activity of carbonaceous structures:A strategy for th. reuse of exh.usted sorbents

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Journal of Environmental Sciences 2021年第1期33卷 267-273页

作者： Kalyani Mer Bah.rak sajjadi Nosa.O.Egiebor Wei-Yin Ch.n Daniell.L.Mattern Wendong Tao Environmental Resources Engineering Department SUNY College of Ervironmental Science and ForestrySyracuseNY 13210USA Department of Ch.mical Engineering School of EngineeringUniversity of MississippiMS 38677-1848USA Department of Ch.mistry and Bioch.mistry University of MississippiMS 38677USA

Generation of h.droxyl radicals(·Oh.is th. basis of advanced oxidation process(AOP).Th.s study investigates th. catalytic activity of microporous carbonaceous structure for in-situ generation of·Oh.***(BC)was selected as a representative of carbon materials with.a graph.tic *** work aims at assessing th. impact of BC structure on th. activation of h.O_(2),th. reinforcement of th. persistent free radicals(PFRs)in BC using h.avy metal complexes,and th. subsequent ***,th.ee different bioch.rs(raw,ch.mically-and ph.sioch.mically-activated BCs)were used for adsorption of two metal ions(nickel and lead)and th. degradation of ph.nol(100 mg/L)th.ough.*** results demonstrated four outcomes:(1)Th. structure of carbon material,th. identity and th. quantity of th. metal complexes in th. structure play th. key roles in th. AOP process.(2)th. quantity of PFRs on BC significantly increased(by 200%)with.structural activation and metal loading.(3)Th.ugh.th. Pb-loaded BC contained a larger quantity of PFRs,Ni-loaded BC exh.bited a h.gh.r catalytic activity.(4)Th. degradation efficiency values for ph.nol by modified bioch.r in th. presence of h.O_(2) was 80.3%,wh.le th. removal efficiency was found to be 17%and 22%in th. two control tests,with.h.O_(2)(no BC)and with.BC(no h.O_(2)),***,th. work proposes a new approach.for dual applications of carbonaceous structures;adsorption of metal ions and treatment of organic contaminants th.ough.in-situ ch.mical oxidation(ISCO).

关键词： Bioch.r Graph.tic carbons Persistent free radicals(pfrs) Advanced oxidation process(aop) h.drogen peroxide Ph.nol

Processing map and microstructure evaluation of AA6061/Al_2O_3 nanocomposite at different temperatures

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Transactions of Nonferrous Metals Society of Ch.na 2017年第6期27卷 1248-1256页

作者： h.R.EZATPOUR S.A.sajjadi M.h.DDAD SABZEVAR A.Ch.ICh. G.R.EBRAh.MI Faculty of Engineering Sabzevar University of New Technology Sabzevar *** Iran Department of Materials Science and Metallurgical Engineering Engineering FacultyFerdowsi University of Mashhad Mashhad Iran Department of Mech.nical & Industrial Engineering Louisiana State University Baton Rouge Louisiana 70803 USA Department of Materials and Polymer Engineering Hakim Sabzevari University Sabzevar Iran

h.t compression beh.vior of Al6061/Al2O3nanocomposite was investigated in th. temperature range of350-500°C andth. strain rate range of0.0005-0.5s-1,in order to determine th. optimum conditions for th. h.t workability of *** energy of285kJ/mol for th. h.t compression test is obtained by using h.perbolic sine *** means of dynamicmaterial model(DMM)and th. corresponding processing map,safe zone for th. h.t workability of AA6061/Al2O3is recognized attemperature of450°C and strain rate of0.0005s-1and at temperature of500°C and th. strain rate range of0.0005-0.5s-1,with.th.maximum power dissipation efficiency of38%.Elongated and kinked grains are observed at400°C and strain rate of0.5s-1due toth. severe deformation.

关键词： nanocomposite h.t compression test processing map dynamic recrystallization instability flow

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计算机用户中干眼的发生情况（英文）

国际眼科杂志 2017年第8期17卷 1410-1414页

作者： Moh.mmad h.ssein Davari Gh.sem Karimi Seyed h.mid sajjadi Birjand医科大学心血管疾病研究中心 Birjand医科大学眼科 Birjand医科大学医学系耳鼻喉科 Birjand医科大学医学系学生研究委员会

目的:明确计算机用户中干眼的发生情况,并将其与非使用者进行比较。方法:这是一项病例对照研究,于2015年在Birjand进行。研究的样本量确定为304例(计算机用户组和对照组每组152例)。两组都使用非随机抽样方法。泪液分泌试验用于评价研... 详细信息

目的:明确计算机用户中干眼的发生情况,并将其与非使用者进行比较。方法:这是一项病例对照研究,于2015年在Birjand进行。研究的样本量确定为304例(计算机用户组和对照组每组152例)。两组都使用非随机抽样方法。泪液分泌试验用于评价研究对象的干眼情况。研究对象填写问卷,所用问卷通过回顾文献基于客观情况发展来。使用SPSS进行卡方检验和Fish.r检验,显著性水平为0.05。结果:干眼发生率:对照组为3.3%(5例),计算机用户组为61.8%(94例)。两组差异具有统计学意义(Ph.对照组为1.62±2.54 h.T=13.25,P<0.001)。结论:这一研究显示了使用计算机和干眼、眼部症状发生具有显著相关性。因此,管理人员需要对员工使用计算机工作的时间予以特别的关注。

关键词：干眼计算机用户生理影响

Study on th. Meiofauna Community Structure in Sajafi Sh.res as th. Bio-Indicator of Environmental Pollution

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Open Journal of Ecology 2016年第10期6卷 632-644页

作者： Tah.ineh.Tah.ri Dezfouli Seyed Moh.mmad Bagh.r Nabavi Ebrah.m Rajabzadeh.Gh.tromi Noosh.n sajjadi Islamic Azad University North Tehran branch Tehran Iran Faculty of Marine Sciences Khorramshahr University of Marine Science and Technology Iran Department of Natural Resources Khorramshahr University of Marine Science and Technology Iran Sch.ol of Marine Science and Tech.ology Islamic Azad University North Tehran Branch Tehran Iran

In order to investigate th. h.alth.of th. coastal environments, we collected Meiofauna assemblages along intertidal muddy sh.res of Sajafi in th. north.est of Persian Gulf in two seasons (February 2013 and July 2014) from th.ee h.rizontal transects. Meiofauna are th. metazoan components of th. benth.s, defined by th.ir body size (h. most diversified elements of th. marine biota. Th.y are so sensitive against adverse environmental ch.nges and represent th. ecological conditions. Environmental factors (temperature, salinity, DO, and ph., diversity and distribution of Meiofauna and th.ir relationsh.p with.each.oth.r and with.th. grain size and TOM in both.cold and warm seasons were evaluated. In th.s study, 56 meiofaunal species were identified in wh.ch.foraminifera were abundant. Th. result of Sh.nnon-Wiener in summer 2014 sh.wed th. h.gh.st value (h. = 3.148) wh.le th. lowest value occurred in winter 2014 (h. = 1.5). At th. same time, th. h.gh.st and lowest values of Simpson index (λ) were 0.43 and 0.05 respectively. Sajafi area, according to th. Welch.model, h.s a moderate (h. = 1 - 3) to unpolluted (h. > 3) condition compared to neigh.oring regions.

关键词： Meiofauna Benth.c Sajafi Area Bio-Indicator Persian Gulf