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工艺参数对摩擦辅助管应变法加工管组织和力学性能的影响

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Journal of Central South.University 2021年第10期28卷 3008-3017页

作者： S.h.hosseini M.SEDIGh. Sch.ol of Mech.nical Engineering Iran University of Science and TechnologyTehran 16846-13114Iran

研究了摩擦辅助管应变(FATS)法对管材组织和力学性能的影响。采用有限元法分析并进行实验测试。用Taguch.设计(ATD)进行分析,改变转速、进给速率和模具角度来进行数值和实验试验。结果表明,提高进给速率和降低转速提高了Zener-h.llomon... 详细信息

研究了摩擦辅助管应变(FATS)法对管材组织和力学性能的影响。采用有限元法分析并进行实验测试。用Taguch.设计(ATD)进行分析,改变转速、进给速率和模具角度来进行数值和实验试验。结果表明,提高进给速率和降低转速提高了Zener-h.llomon参数(Z),减小了平均晶粒尺寸,而对模具角度没有显著影响。增加Z值可以减小晶粒尺寸,增强加工样品的流动应力。实验结果表明,具有最大Z值的样品其晶粒尺寸从初始的40μm细化到8μm,其流动应力增加5倍。

关键词：摩擦辅助管应变工艺参数微观结构 Taguch.法有限元模拟

Filtered Ring Derived from Discrete Valuation Ring and Its Properties

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Advances in Pure Math.matics 2014年第3期4卷 71-75页

作者： M. h. Anjom Sh.a M. h. hosseini University of Birjand Birjand Iran

In th.s paper we sh.w th.t if R is a discrete valuation ring, th.n R is a filtered ring. We prove some properties and relation wh.n R is a discrete valuation ring.

关键词： Commutative Ring Valuation Ring Discrete Valuation Ring Filtered Ring Graded Ring Filtered Module Graded Module

Limb Length.ning and Reconstruction Society orth.pedic surgeons in th. United States:An analysis of geograph.cal distribution,academic,leadersh.p,and demograph.c ch.racteristics

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World Journal of Orth.pedics 2024年第2期15卷 147-155页

作者： Amir h.man h.veidaei Reza Niakan Seyed h.ssein hosseini-Asl Abijith.Annasamudram Janet D Conway International Center for Limb Length.ning Rubin Institute for Advanced OrthopedicsSinai Hospital of BaltimoreBaltimoreMD 21215United States Student Research.Committee Shiraz University of Medical SciencesShiraz 73Iran Students’Scientific Research.Center Tehran University of Medical SciencesTehran ***Iran

BACKGROUND Th. Limb Length.ning and Reconstruction Society(LLRS)is a premier orth.pedic specialty organization th.t promotes limb reconstruction for all *** membersh.p ch.racteristics,h.wever,are poorly *** study delineates orth.pedic surgeon LLRS members’demograph.c traits,academic ach.evement,leadersh.p attainment,and geograph.cal distribution across th. United *** To inform aspiring orth.pedic professionals,as well as to promote growth.and diversity in both.th. LLRS organization and overarch.ng *** Th.s cross-sectional study examined United States LLRS members’academic,leadersh.p,demograph.c,and geograph.cal *** reviewing th. 2023 LLRS member directory,Google search.results were match.d to th. listings and appended to th. compiled *** and eth.icity were evaluated visually utilizing retrieved *** h.rsch.index(h.index)of academic activity,residency and fellowsh.p training,oth.r graduate degrees,leadersh.p positions,practice type(academic or non-academic),and spoken languages were *** members per state and capita determined geograph.c *** Mann Wh.tney U test was applied to compare h.index between males and females,as well as to assess member differences pertaining to affiliation with.academic vs non-academic practice *** Th. study included 101 orth.pedic surgeons,78(77.23%)Caucasian and 23(22.77%)non-Caucasian,79(78.22%)male and 22(21.78%)*** with.DO degrees comprised only 3.96%(4)of th. coh.rt,wh.le th. vast majority h.ld MDs[96.04%(97)].Mean h.index was 10.55,with.male surgeons h.ving a significantly h.gh.r score(P=0.002).Most orth.pedic surgeons(88.12%,)practiced in academic *** th.se professionals wh. occupied leadersh.p positions,14%were women,wh.le 86%were ***,19(37.25%)United States regions and th. District of Columbia lacked an LLRS-member orth.pedic *** per capita rate across th. United States was 0.30 LLRS orth.pedic

关键词： Limb length.ning and reconstruction Orth.pedic surgeon demograph.cs Orth.pedic surgeon societal membersh.p Orth.pedic fellowsh.ps

A New Structure of Multilevel Inverter with.Reduced Number of Switch.s for Electric Veh.cle Applications

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Energy and Power Engineering 2011年第2期3卷 198-205页

作者： M. Ebadpour M. B. B. Sh.rifian S. h. hosseini 不详

Both.h.brid Electric Veh.cles (h.Vs) and Electric Veh.cles (EVs) need a traction motor and a power in-verter to drive th. traction motor. Th. requirements for th. power inverter include h.gh.peak power, opti-mum consumption of energy, low output h.rmonics and inexpensive circuit. In th.s paper, a new structure of multilevel inverter with.reduced number of switch.s is proposed for electric veh.cle applications. It consists of an h.bridge and an inverter in each.ph.se wh.ch.produces multilevel voltage by switch.ng th. dc voltage sources in series. As th. number of switch.s are reduced, both.conduction and switch.ng losses will be de-creased, wh.ch.leads to increase th. efficiency of converter. Th. size and power consumption of driving cir-cuits are also reduced. Th. proposed th.ee ph.se inverter can produces more number of voltage levels in th. same number of th. voltage source and reduced number of switch.s compared to th. conventional inverters. Th.s structure minimizes th. total h.rmonic distortion (Th.) of th. output voltage waveforms. Th. structure of proposed multilevel inverter, modulation meth.d, switch.ng losses, Th. calculation and simulation re-sults with.PSCAD/EMTDC software are sh.wn in th.s paper.

关键词： Cascaded h.Bridge Electric Veh.cles (EVs) h.brid Modulation Inverters Traction Motors

Etiology of Pancytopenia in Tabriz Sh.h.d Gh.zi h.spital:A Cross-sectional Study in Iran

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Proceedings of Anticancer Research 2024年第4期8卷 104-115页

作者： h.ssein Azari Bostanabad Safa Mousavi Moh.mmad h.ssein hosseini Sadra Sarandili Ali Esfah.ni Babak Nejati Department of h.matology and Oncology Faculty of MedicineTabriz University of Medical SciencesTabrizIran Liqvan h.alth.Center Tabriz University of Medical SciencesTabrizIran h.matology and Oncology Research.Center Tabriz University of Medical SciencesTabrizIran Department of h.alth.Sciences Curtin Medical SchoolCurtin UniversityPerthWAAustralia

Objective:Pancytopenia is ch.racterized by a reduction in all th.ee types of blood cells:eryth.ocytes,leukocytes,and *** is caused by a wide range of diseases,leading to diagnostic *** causes can range from drug reactions to life-th.eatening diseases such.as aplastic anemia and *** study aims to investigate th. causes of pancytopenia,specifically focusing on age and gender differences among ***:Th.s cross-sectional study includes patients of all ages diagnosed with.pancytopenia,as indicated by a CBC/h. sh.wing a WBC count less th.n 4,000/μL,platelet count less th.n 150,000/μL,and h.moglobin levels below 12 g/dL in women and less th.n 13 g/dL in *** study only included patients with.pancytopenia wh. underwent bone marrow examination and were not subjected to ch.moth.rapy or radiation ***:A total of 133 patients with.pancytopenia were included in th. *** average age was 47.35±17.62 years old,with.66%of th. participants being male and 34%being *** leukemia,specifically acute myeloid leukemia(AML)and acute lymph.id leukemia(ALL),was identified as th. primary cause of pancytopenia,accounting for 31.5%of *** anemia was th. second most common cause,accounting for 30%of cases,followed by aplastic anemia at 7.5%.Conclusion:Pancytopenia,a condition marked by th. decrease in both.eryth.ocytes and leukocytes as well as th.ombocytes,can arise from a myriad of *** main findings of th.s study revealed th.t megaloblastic anemia,acute myeloid leukemia(AML),and acute lymph.id leukemia(ALL)were th. most common ***,a considerable proportion of cases of pancytopenia can be attributed to acute ***,expeditious and accurate diagnosis is imperative and h.s th. potential to save lives in such.cases.

关键词： Pancytopenia Leukemia Anemia Bone marrow Blood cells

Effect of Gaussian size distribution width.on minimum fluidization velocity in tapered gas–solid fluidized beds

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Particuology 2022年第7期20卷 71-84页

作者： Mojtaba Rasteh.Goodarz Ah.adi S.h.hosseini Department of Ch.mical Engineering Hamedan University of TechnologyHamedanP.O.Box 65155-579Iran Department of Mech.nical and Aeronautical Engineering Clarkson UniversityPotsdamNY 13699-5725USA Department of Ch.mical Engineering Ilam UniversityIlam 69315-516Iran

Th.s paper investigated th. effect of Gaussian distribution width.average particle diameter,particle loading,and th. tapered angle on minimum fluidization velocity(U_(mf))by conducting extensive experiments in tapered fluidized *** powders with.Gaussian size distribution and different distribution width. were used in th. *** increase in U_(mf)with.increasing th. average particle diameter,particle loading,and th. tapered angle was *** was also a nonmonotonic beh.vior of Umf as th. Gaussian distribution width.*** empirical correlation including dimensionless groups for predicting Umf in tapered beds was developed in wh.ch.th. effect of distribution width.was *** proposed correlation predictions were in good agreement with.th. experimental data,with.a maximum deviation of 16.5%and average and standard deviations of,respectively,6.4%and 7.4%.Th. proposed correlation was also compared with.th.ee earlier models,and th.ir accuracy was discussed.

关键词： Tapered fluidized bed Minimum fluidization velocity Gaussian size distribution Distribution width Dimensional analysis

Th.oretical approach.s to alph. decay h.lf-lives of super-h.avy nuclei

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Ch.nese Ph.sics C 2017年第6期41卷 69-74页

作者： S. S. hosseini h. h.ssanabadi Ph.sics Department Shahrood University of Technology Shahrood Iran

We consider th. systematics of α-decay h.lf-lives of super-h.avy nuclei versus th. decay energy and th. total α-kinetic energy. We calculate th. h.lf-lives using th. experimental Qα values. Th. computed h.lf-lives are compared with.th. experimental data and with.existing empirical estimates and are found to be in good agreement. Also, we obtain α-preformation factors from th. ratio between th.oretical and experimental results for some super- h.avy nuclei and evaluate th. standard deviation. Th. results indicate th. acceptability of th. approach.

关键词： alph. decay super h.avy nuclei (Sh.) h.lf-life preformation factor

Mandelic Acid Single-Crystal Growth.Experiments vs Numerical Simulations

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Communications in Computational Ph.sics 2023年第1期33卷 77-100页

作者： Q.Tan S.A.hosseini A.Seidel-Morgenstern D.Th.venin h.Lorenz Laboratory of Fluid Dynamics and Tech.ical Flows University ofMagdeburg“Otto von Guericke”D-39106MagdeburgGermany Department of Mech.nical and Process Engineering ETH Zurich8092 ZurichSwitzerland Max Planck Institute for Dynamics of Complex Tech.ical Systems(MPI DCTS) 39106MagdeburgGermany

Mandelic acid is an enantiomer of interest in many areas,in particular for th. ph.rmaceutical *** of th. approach.s to produce enantiopure mandelic acid is th.ough.crystallization from an aqueous *** propose in th.s study a numerical tool based on lattice Boltzmann simulations to model crystallization dynamics of(S)-mandelic *** solver is first validated against experimental *** is th.n used to perform parametric studies concerning th. effects of important parameters such.as supersaturation and seed size on th. growth.*** is finally extended to investigate th. impact of forced convection on th. crystal *** on th.re parametric studies,a modification of th. reactor geometry is proposed th.t sh.uld reduce th. observed deviations from symmetrical growth.with.a five-fold h.bit.

关键词： Mandelic acid ph.se-field model lattice Boltzmann meth.d ventilation effect

Klein Gordon Oscillators in Commutative and Noncommutative Ph.se Space with.Psudoh.rmonic Potential in th. Presence and Absence Magnetic Field

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Communications in Th.oretical Ph.sics 2013年第7期60卷 9-18页

作者： h. h.ssanabadi S.S. hosseini Z. Molaee Ph.sics Department Shahrood University of Technology Ph.sics Department Semnan University

We study th. Klein-Gordon oscillator in commutative, noncommutative space, and ph.se space with.psudoh.rmonic potential under magnetic field h.nce th. oth.r ch.ice is studying th. Klein-Gordon equation oscillator in th. absence of magnetic field. In th.s work, we obtain energy spectrum and wave function in different situations by NU meth.d so we sh.w our results in tables.

关键词：空间磁场振荡器相空间 Klein-Gordon方程克莱因可交换非交换波函数