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International Journal of Minerals,Metallurgy and Materials 2019年第6期26卷 766-774页

作者： amirhossein moghanian Moslem Paidar Seyyed Salman Seyedafghahi Olatunji Oladimeji Ojo Department of Materials Engineering Imam Khomeini International UniversityQazvin 34149-16818Iran Department of Material Engineering South Tehran BranchIslamic Azad UniversityTehran 14598-53849Iran Department of Engineering Faculty of Materials Science and EngineeringImam Hossein UniversityTehran 15816-18711Iran Department of Industrial and Production Engineering Federal University of Technology AkureAkurePMB 704Nigeria

A hybrid joint with a satisfactory mixture of pure magnesium and polypropylene(PP)was achieved via friction stir joining(FSW)in a lap-joint *** tool rotational and travel speeds used in this work were 500–700 r/min and 50–100 mm/min,*** mechanical properties and microstructural analysis of the resultant hybrid Mg/PP joint were *** results show that the maximum tensile shear strength(22.5 MPa)of the joint was attained at 700 r/min and 75 mm/min due to the optimum percentage fraction of mechanical interlocking(48%)and the presence of magnesium *** interfacial joint center exhibits the maximum microhardness values because of the presence of refined and intertwined Mg fragments and density dislocations in the matrix of the *** joint failed via two different modes:interfacial line and weld zone fractures,respectively.

关键词： welding microstructure pure magnesium polypropylene rotational speed

Platform Evolution in an Oligo-Miocene Back-arc Basin:An Example from the Central Iran Basin

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 185-206页

作者： Masoud SHARIFI-YAZDI amirhossein ENAYATI Jamal SALEHI AGHDAM Mohammad BAHREHVAR Seyed Mustafa REZAEI Department of Geology Faculty of Earth SciencesGeography and AstronomyUniversity of Vienna1090 Vienna.Austria Geology and Geophysics Department Tehran Energy Consultants(TEC Co.)TehranIran School of Geology College of ScienceUniversity of TehranTehranIran Department of Geology Tarbiat Modares UniversityTehranIran

The Qom Formation is the most important hydrocarbon reservoir target in Central *** Qom platform developed in a back-arc basin during the Oligo-Miocene due to the closing of the Tethyan *** formation consists of a variety of carbonate and non-carbonate facies deposited on a platform ranging from supratidal to basin.A combination of tectonic and eustatic events led to some lateral and vertical facies variations in the study *** third-order depositional sequences and related surfaces were identified regarding vertical facies changes in the studied sections of this Oligo-Miocene *** to all results and data,this succession was initially deposited during the Chattian upon a distally steepened ramp of siliciclastic-carbonate composition,including the Bouma ***,from the late Chattian to the Aquitanian,the platform changed into a homoclinal carbonate ramp with a gentle *** respect to tectonic activity,this phase was a calm period during the deposition of the Qom ***,a drowned carbonate platform and a rimmed shelf emerged during the Burdigalian,terminated by the continental deposits of the Upper Red *** all geological characteristics,three main tectono-eustatic evolutionary phases have been recognized in the Qom back-arcbasin.

关键词： carbonate ramp depositional facies submarine fan eustasy basement faults back-arc basin

Nanoindentation responses of NiCoFe medium-entropy alloys from cryogenic to elevated temperatures

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Journal of Iron and Steel Research International 2024年第8期31卷 2068-2077页

作者： Qin-qin Xu Kamran Karimi amirhossein H.Naghdi Wen-yi Huo Chong Wei Stefanos Papanikolaou NOMATEN Centre of Excellence National Centre for Nuclear ResearchOtwock 05-400MazowszePoland College of Mechanical and Electrical Engineering Nanjing Forestry UniversityNanjing 210037JiangsuChina Science and Technology on Thermo Structural Composite Materials Laboratory Northwestern Polytechnical UniversityXi'an 710072ShaanxiChina School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina

NiCoFe alloy,a medium-entropy alloy,shows potential for applications in extreme ***,there is a theoretical barrier concerning the unclear understanding of its high-temperature dislocation motion *** load response exhibits distinct signatures relevant to thermal activation,most notably a decrease in critical force(i.e,softening)from cryogenic to elevated temperatures,e.g.,from 200 to 1000 *** onset of plasticity is characterized by the nucleation of stacking faults and prismatic loops at low temperatures,whereas the surface nucleation of Shockley partial dislocations dominates plasticity at elevated *** show that thermal effects lead to non-uniform atom pile-ups and control the rate of phase transformation with increasing indentation *** findings in this work extend the understanding of the mechanical response of NiCoFe alloys under indentation at different temperatures,shedding light on the underlying dislocation motion mechanisms and surface deformation *** observed transformation-induced plasticity mechanism has implications for the properties of medium-entropy alloys and their potential applications in extreme environments.

关键词： Orientation Dislocations Mechanical behaviors Phase transition

Understanding the Novel Approach of Nanoferroptosis for Cancer Therapy

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Nano-Micro Letters 2024年第9期16卷 501-556页

作者： Afsana Sheikh Prashant Kesharwani Waleed H.Almalki Salem Salman Almujri Linxin Dai Zhe‑Sheng Chen amirhossein Sahebkar Fei Gao Department of Pharmaceutics School of Pharmaceutical Education and ResearchJamia HamdardNew Delhi 110062India Department of Pharmacology and Toxicology Faculty of PharmacyUmm Al-Qura UniversityMakkahSaudi Arabia Department of Pharmacology College of PharmacyKing Khalid University61421 Asir‑AbhaSaudi Arabia State Key Laboratory of Southwestern Chinese Medicine Resources Pharmacy SchoolChengdu University of Traditional Chinese MedicineChengdu 611130People’s Republic of China Department of Pharmaceutical Sciences College of Pharmacy and Health SciencesSt.John’s UniversityNew York 11439USA Biotechnology Research Center Pharmaceutical Technology InstituteMashhad University of Medical SciencesMashhadIran Applied Biomedical Research Center Mashhad University of Medical SciencesMashhadIran

As a new form of regulated cell death,ferroptosis has unraveled the unsolicited theory of intrinsic apoptosis resistance by cancer *** molecular mechanism of ferroptosis depends on the induction of oxidative stress through excessive reactive oxygen species accumulation and glutathione depletion to damage the structural integrity of *** to their high loading and structural tunability,nanocarriers can escort the delivery of ferro-therapeutics to the desired site through enhanced permeation or retention effect or by active *** review shed light on the necessity of iron in cancer cell growth and the fascinating features of ferroptosis in regulating the cell cycle and ***,we discussed the effect of ferroptosis-mediated therapy using nanoplatforms and their chemical basis in overcoming the barriers to cancer therapy.

关键词： Ferroptosis Nanoparticles Ferrotherapy Cancer Genes Nanotechnology Toxicity Reactive oxygen species

挤压速度对搅拌摩擦反挤压法制备Cu-5%Ti_(2)SnC复合丝材性能的影响

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Transactions of Nonferrous Metals Society of China 2024年第3期34卷 935-951页

作者： amirhossein JAHANI Hamed JAMSHIDI AVAL Mohammad RAJABI Roohollah JAMAATI Department of Materials Engineering Babol Noshirvani University of TechnologyShariati AvenueBabol 47148-71167Iran

对粉末冶金法制备的含5%(体积分数)Ti_(2)Sn CMAX相的初始复合材料进行搅拌摩擦反挤压(FSBE)处理,研究FSBE工艺的轴向横移速度对Cu-Ti_(2)Sn C复合线材显微组织、力学性能、电学性能和磨损性能的影响。结果表明,随着挤压速度的增加,显... 详细信息

对粉末冶金法制备的含5%(体积分数)Ti_(2)Sn CMAX相的初始复合材料进行搅拌摩擦反挤压(FSBE)处理,研究FSBE工艺的轴向横移速度对Cu-Ti_(2)Sn C复合线材显微组织、力学性能、电学性能和磨损性能的影响。结果表明,随着挤压速度的增加,显微组织中孪晶增多,Ti_(2)SnC颗粒细化,MAX相和Cu基体之间的界面结合改善。当转速为600r/min,轴向横移速度为25mm/min时,Cu-Ti_(2)SnC复合线材具有最大的硬度、屈服强度和极限抗拉强度,分别为HV 132.7、278.34MPa和485.15MPa,这是其更强的界面结合和更细的MAX相导致的。此外,当转速为600 r/min,轴向横移速度为25 mm/min时,Cu-Ti_(2)SnC复合丝的电导率最高,达到89.21%(IACS),磨损率最低,为0.0015 mg/m,这是其更大的晶粒尺寸、更强的界面结合与更低的密度导致的。

关键词：搅拌摩擦反挤压 Ti_(2)SnC MAX相铜基复合材料电导率

First Light Curve Analysis of NSVS 8294044,V1023 Her,and V1397 Her Contact Binary Systems

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Research in Astronomy and Astrophysics 2024年第5期24卷 1-12页

作者： Atila Poro Sabrina Baudart Mahshid Nourmohammad Zahra Sabaghpour Arani Fatemeh Farhadi Selda Ranjbar Salehian Ahmad Sarostad Saeideh Ranjbaryan Iri Olya Maryam Hadizadeh amirhossein Khodaei Astronomy Department of the Raderon AI Lab. BurnabyBCCanada Double Stars Committee SociétéAstronomique de FranceParisFrance Independent Astrophysics Researcher IsfahanIran Akhtaran Astronomical Society Isfahan ProvinceAran and BidgolIran Department of Physics Faculty of ScienceZanjan UniversityZanjanIran Astronomy Students'Scientific Association University of TabrizEast Azerbaijan ProvinceTabrizIran Yazd Desert Night Sky Astronomy Institute Yazd ProvinceYazdIran Ayaz Astronomical Association East Azerbaijan ProvinceTabrizIran Khayyam Astronomy Association FarsFasaIran

The first photometric light curve investigation of the NSVS 8294044,V1023 Her,and V1397 Her binary systems is *** used ground-based observations for the NSVS 8294044 system and Transiting Exoplanet Survey Satellite data for V1023 Her and V1397 *** primary and secondary times of minima were extracted from al the data,and,by collecting the literature,a new ephemeris was computed for each *** fits for the O-C diagrams were conducted using the Markov Chain Monte Carlo (MCMC) *** curve solutions were performed using the PHysics Of Eclipsing BinariEs Python code and the MCMC *** systems were found to be contact binary stars based on the fillout factor and mass ratio.V1023 Her showed the O’Connell effect and a cold starspot on the secondary component was required for the light curve *** absolute parameters of the system were estimated based on an empirical relationship between orbital period and *** presented a new T–M equation based on a sample of 428 contact binary systems and found that our three target systems were in good agreement with the *** positions of the systems were also depicted on the M–L,M–R,q–L_(ratio),and M_(tot)–J_(0)diagrams in the logarithmic scales.

关键词： (stars:)binaries eclipsing-techniques photometric-stars individual(NSVS 8294044)

Frequency-Diversified Space-Efficient Radiating Surface Using Convolved Electric and Magnetic Currents for Highly Dense Multiband Antenna-Frontend Integration

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Electromagnetic Science 2024年第1期2卷 63-76页

作者： amirhossein Askarian Pascal Burasa Ke Wu Department of Electrical Engineering Poly-Grames Research CenterPolytechnique MontrealQC H3T1J4Canada

We propose and investigate a methodology based on convolved electric and magnetic currents for the generation of multi-band responses over a space-shared radiating ***,a single wideband antenna operation principle based on inter-leaved dipole and slot modes is studied and analyzed using full-wave simulations followed by a qualitative time domain ***,a 2×2 dual-band radiating unit is conceived and developed by closely arranging single wideband *** this case,multimode resonances are generated in a lower frequency band by a proper convolving and coupling of the magnetic and electric currents realized in the gaps between the antennas and on the surface of the antennas,*** methodology can be deployed repeatedly to build up a self-scalable topology by reusing the electromagnetically(EM)connected radiating surfaces and gaps be-tween the radiating *** to the efficient reuse of the electromagnetic region for the development of multiband radiation,a high aperture-reuse efficiency is ***,as a proof of concept,a 2×4 dual-band array operating in Ku-and Ka-bands is devel-oped and fabricated by a linear arrangement of the two developed radiating *** measurement results show that the proposed antenna array provides impedance and gain bandwidths of 30%and 25.4%in the Ku-band and 10.65%and 8.52%in the Ka-band,respectively.

关键词： Aperture-shared array Aperture-reused efficiency Antenna-frontend integration Dual-band antenna Magneto-electric dipole antenna Multi-mode resonance Multi-band array Multi-functional antenna Wideband antenna array

Numerical prediction of hydrodynamic cavitating flow structures and their corresponding erosion

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Journal of Hydrodynamics 2021年第3期33卷 546-571页

作者： amirhossein Mohammadkhani Mansour Alizadeh Department of Mechanical Engineering Iran University of Science and TechnologyTehranIran

Hydrodynamic cavitating flows usually consist of 3-D intense vortical flows that are detached from solid *** vortical flows normally generate heaps of cavitating flow structures,which,in turn,govern the location of cavitation erosion before ***,this study introduces a new numerical approach based on the improved delayed detached eddy simulation(IDDES)turbulence modeling for predicting cavitating ***,the solution of compressible Eulerian-Eulerian two-phase flow and the IDDES turbulence model was linked to the microjet hypothesis and unsteady behavior of pressure and vapor volume to predict the corresponding erosion of cavitating *** method for cavitation erosion prediction,a modified version taken from previous studies,was applied as a post-processing *** validation of cavitating flow predictions was performed for the first time on the Grenoble axisymmetric nozzle by comparing them with 21 photos of cavitation from the previous experimental *** results showed that the present numerical approach estimated various features of hydrodynamic cavitation well,including shedding processes and the length,shape,and collapse of cavitating *** the numerical analysis,three main stages were detected for the present cavitating flow,and the vorticity-cavitation interactions were investigated by the vorticity transport *** streak-like and tube-like cavitating(STLIC and TULIC)structures were introduced in the second stage,initiated by flow instability,and entirely governed by corresponding turbulent flow *** collapse of these cavitating structures is one of the primary sources of cavitation erosion on lower and upper *** results of the numerical erosion predictions were compared with those of the previous erosion tests on the Grenoble axisymmetric *** numerical performance was achieved in predicting the location and intensity of cavitation erosion.

关键词： Turbulent and cavitating structures cavitation erosion detached vortical flow Hybrid RANS-LES turbulence modeling flow instability flow visualization

Prediction of oil recovery in naturally fractured reservoirs subjected to reinfiltration during gravity drainage using a new scaling equation

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Petroleum Exploration and Development 2020年第6期47卷 1307-1315页

作者： AGHABARARI amirhossein GHAEDI Mojtaba RIAZI Masoud Department of Petroleum Engineering School of Chemical and Petroleum EngineeringP.O.Box ***Shiraz UniversityShirazIran Reservoir Modeling and Simulation Center(RMSC) P.O.Box ***Shiraz UniversityShirazIran

By comparing numerical simulation results of single-porosity and dual-porosity models,the significant effect of reinfiltration to naturally fractured reservoirs was confirmed.A new governing equation was proposed for oil drainage in a matrix block under the reinfiltration *** inspectional analysis,a dimensionless equation suitable for scaling of recovery curves for matrix blocks under reinfiltration has been *** the design of experiments,test cases with different rock and fluid properties were defined to confirm the scope of the presented *** defined cases were simulated using a realistic numerical simulation *** method can estimate the oil amount getting into the matrix block through reinfiltration,help simulate the oil drainage process in naturally fractured reservoirs accurately,and predict the recovery rate of matrix block in the early to middle periods of *** the defined scaling equation in the dual-porosity model can improve the accuracy of the predicted recovery rate.

关键词： naturally fractured reservoir gravity drainage reinfiltration scaling equation dual-porosity simulation inspectional analysis

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Fluoroquinolones-resistant Shigella species in Iranian children:a meta-analysis

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World Journal of Pediatrics 2019年第5期15卷 441-453页

作者： Farzad Khademi amirhossein Sahebkar Department of Microbiology School of MedicineArdabil University of Medical SciencesDaneshgah StreetArdabil ***Iran Biotechnology Research Center Pharmaceutical Technology InstituteMashhad University of Medical SciencesMashhadIran Neurogenic Inflammation Research Center Mashhad University of Medical SciencesMashhadIran School of Pharmacy Mashhad University of Medical SciencesMashhadIran

Background Shigella is one of the most common causes of childhood dysentery along with high rate of morbidity and mortality in both developing and developed *** to the World Health Organization(WHO)reports,the prevalence of fluoroquinolones-resistant Shigella species is increasing worldwide which can cause treatment failure of Shigella *** there has not been any comprehensive information on drug-resistant Shigella species in Iran,we conducted the following meta-analysis to raise *** We conducted a literature search on antibiotic resistance of Shigella species to collect published studies in Iran using national and international *** search was performed by up to Jan 30,2019 and eligible studies were included in the meta-analysis by predefined *** Antimicrobial susceptibility testing using disk diffusion technique was the only used method in all included *** resistance characteristics of Shigella species against WHO recommended therapeutic regimens were as follows:*** 7%,*** 3.8%,*** 6.9%and *** 2.6%to ciprofloxacin,*** 27.9%,*** 19.3%,*** 15.7%and *** 9.5%to ceftriaxone and also *** 91.7%,*** 20.7%,*** 46.7%and *** 32.3%to *** to pivmecillinam has not been investigated in *** Our findings revealed that ciprofloxacin can still be used as the first-line antibiotic for Shigella infections in Iranian ***,it seems that second-line antibiotics i.e.,ceftriaxone and azithromycin are not good choices for treatment and thus not recommended.

关键词： Antibiotic resistance Fluoroquinolone Iran Shigella