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The microstructure characteristics and fracture behavior of the polyhedral primary iron-rich phase and plate-shaped eutectic iron-rich phase in a high-pressure die-cast Alsi10mnmg alloy

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Journal of materials science & Technology 2023年第9期140卷 201-209页

作者： X.Y.Jiao Y.X.Liu J.Wang W.N.Liu A.X.Wan stuart Wiesner s.m.Xiong school of materials science and Engineering Northeastern UniversityShenyang 110819China school of materials science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Lightweight structural materials Liaoning ProvinceNortheastern UniversityShenyang 110819China Key Laboratory for Advanced materials Processing Technology Tsinghua UniversityBeijing 100084China shanghai synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Ein Unternehmen der ALUmINIUm RHEINFELDEN Group RHEINFELDEN 79618Germany

The characterization of multiple iron-rich phases in high-pressure die-cast Alsi10mnmg alloy was *** was focused on the formation and fracture behavior of the primary iron-rich phase((P-ImC)_(I))formed in the shot sleeve and plate-shaped eutectic iron-rich phase in high-pressure die cast(HPDC)Alsi10mnmg *** show that multiple types of iron-rich phases with various morphologies,in-cluding primary iron-rich phases(polyhedral(P-ImC)_(I) and(P-ImC)_(II))and eutectic iron-rich phases(plate-shaped,net shape,and fish-bone shape),were found in HPDC ***(P-ImC)_(I) formed in the shot sleeve were distributed in the interface between primaryα-Al and binary Al-si *** size(P-ImC)_(II) and various eutectic iron-rich phases formed in the die cavity and they were distributed in Al-si binary *** primary iron-rich phases belonged to a simple cubic crystal structure with a lattice constant a=1.265 nm and they exhibited a lateral growth characteristic with a termination of{110}surface.βphase was surrounded byδphase and they coexisted in a plate-shaped iron-rich ***-density stacking fault inβphase andδ/βinterface provided an excellent nucleation site forδ*** mechanical behavior,the stress concentration caused by eutectic iron-rich phases was far less than(P-ImC)_(I) and it would not cause crack initiation along the eutectic cluster *** addition,(P-ImC)_(I) showed the worst deformation coordination with primaryα-Al while the plate-shaped eutectic iron-rich phase exhibited similar deformation characteristics with silicon particles.

关键词： Alsi10mnmg High-pressure die casting multiple iron-rich phases

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Why primordial continents were recycled to the deep:Role of subduction erosion

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Geoscience Frontiers 2017年第2期8卷 337-346页

作者： s.Azuma s.Yamamoto H.Ichikawa s.maruyama Earth-Life science Institute Tokyo Institute of Technology Graduate school of Environment and Information sciences Yokohama National University Geodynamics Research Center Ehime University

Geological observations indicate that there are only a few rocks of Archean Earth and no Hadean rocks on the surface of the present-day *** these facts,many scientists believe that the primordial continents never existed during Hadean Earth,and the continental volume has kept *** the other hand,recent studies reported the importance of the primordial continents on the origin of life,implying their *** this paper,we discussed the possible process that could explain the loss of the primordial continents with the assumption that they existed in the *** depending on the timing of the initiation of plate tectonics and its convection style,subduction erosion,which is observed on the present-day Earth,might have carried the primordial continents into the deep mantle.

关键词： subduction erosion Hadean Plate tectonics Archean

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Diverse morphologies of zinc oxide nanoparticles and their electrocatalytic performance in hydrogen production

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Journal of Energy Chemistry 2021年第5期30卷 162-170页

作者： Veronica m.sofianos Junqiao Lee Debbie s.silvester Pralok K.samanta mark Paskevicius Niall J.English Craig E.Buckley Department of Physics and Astronomy Fuels and Energy Technology InstituteCurtin UniversityPerthBentley 6102Australia University College Dublin School of Chemical and Bioprocess EngineeringBelfieldDublin 4Ireland Curtin Institute for Functional moleailes and Interfaces School of Molecular and Life SciencesCurtin UniversityPerthBentley 6102Australia

Hydrogen is considered an attractive alternative to fossil fuels,but only a small amount of it is produced from renewable energy,making it not such a clean energy carrier after *** hydrogen through water electrolysis is promising,but using a cost-effective and high-performing catalyst that has longterm stability is still a *** study exploits,for the first time,the potential of zinc oxide nanoparticles with diverse morphologies as catalysts for the electrocatalytic production of hydrogen from *** morphology of the nanoparticles(wires,cuboids,spheres)was easily regulated by changing the concentration of sodium hydroxide,used as the shape controlling agent,during the *** spherical morphology exhibited the highest electrocatalytic activity at the lowest potential *** spherical nanoparticles had the highest number of oxygen vacancies and lowest particle size compared to the other two morphologies,features directly linked to high catalytic ***,the nanowires were much more stable with repeated ***-functional theory showed that the presence of oxygen vacancies in all three morphologies led to diminished band gaps,which is of catalytic interest.

关键词： ZnO nanoparticles Nanocatalysts Electrocatalysis Hydrogen production Water splitting

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On global behavior for complex soliton solutions of the perturbed nonlinear schrödinger equation in nonlinear optical fibers

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Journal of Ocean Engineering and science 2022年第5期7卷 431-443页

作者： m.s.Osman Hassan Almusawa Kalim U.Tariq sadia Anwar sachin Kumar muhammad Younis Wen-Xiu ma Department of mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt Department of mathematics Faculty of Applied ScienceUmm Alqurah UniversityMakkah 21955Saudi Arabia Department of mathematics College of SciencesJazan UniversityJazan 45142Saudi Arabia Department of mathematics Mirpur University of Science and TechnologyMirpur-10250(AJK)Pakistan Department of mathematics Faculty of Mathematical SciencesUniversity of DelhiDelhi 110007India Centre for Undergraduate studies University of the PunjabLahore 54590Pakistan Department of mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina Department of mathematics King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of mathematics and statistics University of South FloridaTampaFL 33620USA school of mathematical and statistical sciences North-West UniversityMafikeng CampusPrivate Bag X2046Mmabatho 2735South Africa

In this research article,the perturbed nonlinear schrödinger equation(P-NLsE)is examined by utilizing two analytical methods,namely the extended modified auxiliary equation mapping and the generalized Riccati equation mapping ***,we establish several sorts of new families of complex soliton wave solutions such as hyperbolic functions,trigonometric functions,dark and bright solitons,periodic solitons,singular solitons,and kink-type solitons wave solutions of the *** the mentioned methods,the results are displayed in 3D and 2D contours for specific values of the open *** obtained findings demonstrate that the implemented techniques are capable of identifying the exact solutions of the other complex nonlinear evolution equations(C-NLEEs)that arise in a range of applied disciplines.

关键词： P-NLsE Optical solitons The AEm method The REm method

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Long-Range Displacement sensor Based on sms Fiber structure and OTDR

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Photonic sensors 2015年第2期5卷 166-171页

作者： A. ARIFIN A. m. HATTA sEKARTEDJO m. s. mUNTINI A. RUBIYANTO Department of Physics Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia Departement of Engineering Physics Institut Teknologi Sepuluh Nopember Surabaya 6011 Indonesia Department of Physics Hasanuddin University Makassar 90245 Indonesia Department of Physics Jazan University Jazan 45-142 Saudi Arabia

This paper presents a long-range displacement measurement method by using a single- multi-single mode （sms） fiber structure, attached to a flexible plate between two permanent poles and the optical time domain reflectometer （OTDR）-based interrogator. The sms fiber structure sensors are prepared with two different configurations, i.e. straight and sinusoidal configurations. It is demonstrated that the displacement sensor can perform a displacement measurement with a range from 0 mm to 150 mm with a resolution of 0.159 mm. The sinusoidal configuration provides a better sensitivity than the straight configuration. The proposed sensor offers a low cost, and it can be implemented for quasi-distributed displacement measurement which is suitable for civil structure monitoring.

关键词： Displacement sensor sms fiber structure OTDR

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microstructural refinement and mechanical properties of direct extruded Zm21 magnesium alloys

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Transactions of Nonferrous metals society of China 2011年第10期21卷 2154-2159页

作者： m.THIRUmURUGAN G.m.THIRUGNAsAmBANDAm s.KUmARAN T.sRINIVAsA RAO Department of metallurgical and materials Engineering National Institute of Technology

Cast Zm21 magnesium alloys were subjected to symmetric extrusion at four different temperatures（200,250,300 and 350 ℃） with three extrusion ratios of 4：1,9：1 and 16：1,*** effects of extrusion parameters such as temperature and extrusion ratio were studied by optical microscopy,X-ray diffraction（XRD） and tensile *** optical micrographs exhibited various stages of recrystallization,i.e.,partial to full recrystallization influencing mechanical properties to good *** extrusion temperature resulted in coarse grains,whereas finer grains were obtained at higher extrusion *** tensile strength of this alloy was increased from 160 mPa to 316 mPa after extrusion at 250 ℃ with an extrusion ratio of 9：1.

关键词： Zm21 magnesium alloy grain refinement recrystallization

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Antioxidant Effect of sepia Ink Extract on Extrahepatic Cholestasis Induced by Bile Duct Ligation in Rats

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Biomedical and Environmental sciences 2015年第8期28卷 582-594页

作者： Hanan saleh Amel m soliman Ayman s mohamed mohamed-Assem s marie Zoology Department Faculty of Science Cairo University

Objective The aim of our study was to assess the complications of hepatic fibrosis associated with bile duct ligation and the potential curative role of sepia ink extract in hepatic damage induced by bile duct ligation. methods Rattus norvegicus rats were divided into 3 groups: sham-operated group, model rats that underwent common bile duct ligation (BDL), and BDL rats treated orally with sepia ink extract (200 mg/kg body weight) for 7, 14, and 28 d after BDL. Results There was a significant reduction in hepatic enzymes, ALP, GGT, bilirubin levels, and oxidative stress in the BDL group after treatment with sepia ink extract. Collagen deposition reduced after sepia ink extract treatment as compared to BDL groups, suggesting that the liver was repaired. Histopathological examination of liver treated with sepia ink extract showed moderate degeneration in the hepatic architecture and mild degeneration in hepatocytes as compared to BDL groups. Conclusion sepia ink extract provides a curative effect and an antioxidant capacity on BDL rats and could ameliorate the complications of liver cholestasis.

关键词： Bile duct ligation Hepatic fibrosis Oxidative stress Liver collagen percentage Histopathological examination

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Fingerprint Agreement Using Enhanced Kerberos Authentication Protocol on m-Health

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Computer systems science & Engineering 2022年第11期43卷 833-847页

作者： A.s.Anakath s.Ambika s.Rajakumar R.Kannadasan K.s.sendhil Kumar school of Computing E.G.S.Pillay Engineering CollegeNagapattinam611002India Department of Computer science and Engineering University College of Engineering AriyalurAriyalur621705India Department of mathematics University College of Engineering AriyalurAriyalur621705India Department of software systems School of Computer Science and Engineering(SCOPE)Vellore Institute of Technology UniversityVellore632014India Department of IoT School of Computer Science and Engineering(SCOPE)Vellore Institute of Technology UniversityVellore632014India

Cloud computing becomes an important application development platform for processing user data with high *** providers are accustomed to providing storage centers outside the trusted location preferred by the data ***,ensuring the security and confidentiality of the data while processing in the centralized network is very *** secured key transmission between the sender and the receiver in the network is a huge challenge in managing most of the sensitive data transmission among the cloud *** are very active over the network like real authenticated user to hack the personal sensitive data,such as bank balance,health data,personal data,and confidential documents over the cloud *** this research,a secured key agreement between the sender and the receiver using Kerberos authentication protocol with fingerprint is proposed to ensure security in *** of patients are monitored using wireless sensor devices and are then transferred to the *** protocol helps in avoiding unnecessary communication of authenticated data over the cloud *** security process is a procedure with the best security in most of the authentication *** node is responsible in carrying data packets from the sender to the receiver in the cloud *** Kerberos protocol is used in trust node to ensure *** communication between the local health center and the healthcare server is ensured by using a fingerprint feature called minutiae form,which refers to the fingerprint image of both sender and *** computational and communicational cost of the proposed system is lesser when compared with other existing authentication methods.

关键词： Protocol security m-health cloud computing biometric fingerprint kerberos protocol

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submonolayer Eu superstructures—A class of 2D magnets

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Nano Research 2023年第1期16卷 1500-1506页

作者： Dmitry V.Averyanov Ivan s.sokolov Alexander N.Taldenkov Oleg E.Parfenov Andrey m.Tokmachev Vyacheslav G.storchak National Research Center“Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia

Two-dimensional(2D)magnetic materials promise unconventional properties and quantum phases as well as advances in ultracompact *** of 2D magnets often reaches a single monolayer but in general can go beyond this limit,as demonstrated by 2D magnetism of submonolayer Eu superstructures coupled with *** question is whether the submonolayer magnetism constitutes a general ***,we demonstrate that regular Eu lattices form a class of 2D magnets displaying various structures,stoichiometries,and chemical *** synthesized and studied a set of Eu superstructures on Ge(001).Their magnetic properties are consistent with the emergence of a magnetic order such as ferro-or *** particular,control over the magnetic transition temperature by weak magnetic fields indicates the 2D nature of the *** together,Eu/Ge and Eu/si superstructures seed a nucleus of the research area addressing the emergence of magnetism in submonolayer chemical species.

关键词： two-dimensional(2D)magnetism submonolayer superstructure surface reconstruction germanium

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Extraction,Utilization Pattern and Prioritization of Fuel Resources for Conservation in manali Wildlife sanctuary,Northwestern Himalaya

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Journal of mountain science 2012年第4期9卷 580-588页

作者： man s.RANA sakshi B.RANA s.s.sAmANT Department of Plant sciences Government CollegeBanjar-Kullu175123Himachal PradeshIndia Department of Plant sciences Government CollegeKullu175101Himachal PradeshIndia G.B.Pant Institute of Himalayan Environment&Development Himachal UnitMohal-Kullu175126Himachal PradeshIndia

Fuelwood is the main source of the energy in mountainous ***,annual wood consumption is very *** on fuelwood resources,and their extraction and availability is very ***,present study was carried out to study the diversity of fuelwood species,annual collection,preference and availability of fuel species in the *** four species(25 trees and 9 shrubs) were extracted for fuel by the *** collection and species preference was highest for Picea smithiana,Cedrus deodara,Indigofera heterantha,Pinus wallchiana and sorbaria tomentosa,*** use index indicating use pressure was highest for ***,***,*** and Abies pindrow,*** native species,some non-native horticultural and agroforestry species such as malus pumila,***,Celtis australis,*** also being used as *** species showed their availability in eight forest types whereas,population and regeneration status was ***,immediate actions are suggested to sustain current and future demand of *** afforestation of degraded,uncultivated and marginal lands through high quality and preferred fuel species might reduce pressure on wild and selective species.

关键词： Fuelwood Resource Use Index Communities Conservation

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