检索结果-南通市图书馆

Isomeric pair 95m,g Nb in the photonuclear reactions on natMo at the bremsstrahlung end-point energy of 38–93 Mev

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2023年第12期47卷 64-72页

作者： I.s.Timchenko O.s.Deiev s.M.Olejnik s.M.Potin v.A.Kushnir v.v.Mytrochenko s.A.Perezhogin v.A.Bocharov Institute of Physics Slovak Academy of SciencesSK-84511 BratislavaSlovakia National science Center"Kharkov Institute of Physics and Technology" 1Akademichna St.61108KharkivUkraine CNRs/IJCLAB 15 Rue Georges Clemenceau Str.Orsay91400France

The ^(nat)Mo(γ,xnp)^(95m,g)Nb photonuclear reaction was studied using the electron beam from the NsC KIPT linear accelerator *** experiment was performed using the activation and off-line γ-ray spectrometric *** experimental isomeric yield ratio(IR) was determined for the reaction products ^(95m,g)Nb at the bremsstrahlung end-point energy E_(γmax) range of 38-93 *** obtained values of IR are in satisfactory agreement with the results of other studies and extend the range of previously known *** theoretical values of the yields Y_(m,g)(E_(γmax)) and the IR for the isomeric pair ^(95m,g)Nb from the ^(nat)Mo(γ,xnp) reaction were calculated using the partial cross-sections σ(E) from the TALYs1.95 code for six different level density *** the investigated range of E_(γmax),the theoretical dependence of IR on energy was confirmed-the IR smoothly increases with increasing *** comparison showed a noticeable difference(more than 3.85 times) in the experimental IR relative to all theoretical estimates.

关键词： photonuclear reactions natMo isomeric pair 95m gNb isomeric yield ratio reaction yield bremsstrahlung end-point energy of 38–93 Mev activation and off-lineγ-ray spectrometric technique TALYs1.95 level density model GEANT4.9.2.

Plasma electrolytic oxidation of the magnesium alloy MA8 in electrolytes containing TiN nanoparticles

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & Technology 2017年第5期33卷 461-468页

作者： D.v.Mashtalyar s.v.Gnedenkov s.L.sinebryukhov I.M.Imshinetskiy A.v.Puz Institute of Chemistty Far Eastern BranchRussian Academy of Sciences 159Prosp.100-1etya VladivostokaVladivostok 690022Russia Far Eastern Federal University 8 Sukhanova St.Vladivostok690950Russia

The formation of protective multifunctional coatings on magnesium alloy MA8 using plasma electrolyt- ic oxidation （PEO） in an electrolytic system containing nanosized particles of titanium nitride was investigated. Electrochemical and mechanical properties of the obtained layers were examined. It was established that microhardness of the coating with the nanoparticle concentration of 3 gl-1 increased twofold （4.2 ± 0.5 GPa）, while wear resistance decreased （4.97 × 10-6 mm3 N-1 m-1）, as compared to re- spective values for the PEO-coating formed in the electrolyte without nanoparticles （2.1 ± 0.3 GPa, 1.12 × 10.5 mm3 N-1 m-1）.

关键词： Magnesium alloys Protective coatings Plasma electrolytic oxidation Corrosion titanium nitride Nanoparticles

在线全文

学校读者我要写书评

暂无评论

实证主义谬误:批评中的“认识可译性”

文艺研究 1989年第5期 174-175页

作者： s.v.普拉德罕简光印

有一种观点,它可以被一些人尊为“教义”,同时也被另一些人斥为异端,这种观点在最近四十年里显示了它的风采。当维·克·维姆塞特与蒙罗·西·比尔兹利提出“真挚”、“精确”、“自发性”能够和诸如“诚实”、“统一”、“恰当”等“... 详细信息

有一种观点,它可以被一些人尊为“教义”,同时也被另一些人斥为异端,这种观点在最近四十年里显示了它的风采。当维·克·维姆塞特与蒙罗·西·比尔兹利提出“真挚”、“精确”、“自发性”能够和诸如“诚实”、“统一”、“恰当”等“在价值评价方面较为精确的词语”等同起来时,他们第一次表达了这种观点。后面这组词之所以更“精确”是因为它们更“公共”,“公共的”东西就是“精神的”,“精神的”东西是“通过一首诗的语义学和句法构造,通过我们关于语言的习惯知识,通过语法书。

关键词：可译性价值评价语义学自发性句法构造谬误异端实证主义者词语语言学特征

Design of self-healing PEO-based protective layers containing in-situ grown LDH loaded with inhibitor on the MA8 magnesium alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第10期11卷 3688-3709页

作者： A.s.Gnedenkov s.L.sinebryukhov A.D.Nomerovskii v.s.Filonina A.Yu.Ustinov s.v.Gnedenkov Institute of Chemistry of FEB RAs 159 Pr.100-letiya VladivostokaVladivostok690022Russia

The high corrosion rate of magnesium and its alloys in chloride-containing solution significantly reduces the potential of this material for diverse ***,the formation of a smart protective coating was achieved in this work to prevent degradation of the MA8 magnesium alloy.A porous ceramic-like matrix was obtained on the material by plasma electrolytic oxidation(PEO).Further surface functionalization was performed using layered double hydroxides(LDH) served as nanocontainers for the corrosion *** methods of LDH intercalation with benzotriazole(BTA) were *** composition and morphology of the formed coating were studied using sEM-EDX analysis,XRD,XPs,and Raman *** corrosion behavior of the coated samples was evaluated using electrochemical impedance spectroscopy and potentiodynamic *** corrosion rate was estimated using volumetry and gravimetry *** formed composite coating provides the Mg alloy with the lowest corrosion activity(|Z|_(f)=0.1 Hz)=8.48·10^(5) Ω·cm^(2),I_(c)=1.4·10^(-8)A/cm^(2),P_(H)=0.21 mm/year) and improves the protective properties of the PEO-coated sample(|Z|_(f)=0.1 Hz)=8.37·10^(3) Ω·cm^(2),I_(c)=4.1·10^(-7)A/cm^(2),P_(H)=0.31 mm/year).The realization of the self-healing effect of the inhibitor-containing LDH/PEO-coated system was studied using localized electrochemical methods(svET and sIET) with two artificial defects on the surface.A mechanism involving three stages for the active corrosion protection of the alloy was *** findings contribute to the follow-up work of developing modified LDH/PEO-based structures that promote the Mg alloy with high corrosion resistance,superior electrochemical performance for applications in various fields of industry and medicine.

关键词： Magnesium alloy Plasma electrolytic oxidation Layered double hydroxides Corrosion inhibitor Electrochemistry Corrosion rate

Application of integrated simulation environment sIEMNED to the analysis of the MEPHIsT-0 tokamak operation

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2023年第3期25卷 222-233页

作者： D Yu sYCHUGOv s Yu sOLOvIEv A s ZHILKIN A v MELNIKOv s A KRAT Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State University National Research Centre Kurchatov Institute National Research Nuclear University Moscow Engineering Physics Institute National University Moscow Institute of Physics and Technology

This paper presents the results of numerical simulation of plasma equilibrium and stability in the MEPHIsT-0 tokamak with sIEMNED software and comparison of simulation results with *** determined characteristics of the vacuum chamber show that it significantly affects the entire *** various scenarios of the inductor operation,a comparison of experimental data and simulated currents and magnetic fields induced in the chamber was carried *** steady-state tokamak operation,a numerical study of equilibrium plasma configurations was carried out depending on the currents in the poloidal magnetic field coils and plasma *** vertical plasma instability was *** limiting values of plasma ellipticity preventing the vertical plasma instability were numerically *** simulations show that plasma equilibrium is supported by induced *** was shown numerically that magnetic configuration with‘zero of higher order’were obtained before the plasma shot,suggesting consistency between the simulation results and observations.

关键词： mathematical modelling tokamak installation MEPHIsT-0

New approach to formation of coatings on Mg-Mn-Ce alloy using a combination of plasma treatment and spraying of fluoropolymers

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2022年第4期10卷 1033-1050页

作者： D.v.Mashtalyar K.v.Nadaraia I.M.Imshinetskiy s.L.sinebryukhov s.v.Gnedenkov Institute of Chemistry FEB RAs 159 Pr.100-letiyaVladivostok 690022Russia Far Eastern Federal University 10 Ajax BayRussky IslandVladivostok 690922Russia

This paper presents a method of the formation of composite polymer-containing coatings on a Mg–Mn–Ce magnesium alloy by forming a ceramic-like layer using plasma electrolytic oxidation(PEO)and subsequent spraying superdispersed polytetrafluoroethylene *** coating composition and their morphological features were studied by sEM,EDs,GDOEs,and *** presented data confirm the embedding of fluoropolymer in the PEO *** evaluation of the corrosion properties of the formed composite polymer-containing coatings indicates a decrease in the corrosion current density by more than 3 orders of magnitude in comparison with the base PEO *** incorporation of a fluoropolymer in a PEO layer by more than 32%increases the load value at which abrasion of the coating to the substrate occurs and reduces the wear of the coating by more than 27 fold in comparison with the PEO *** has been established that composite coatings possess hydrophobic properties:the value of the contact angle attains 152°.

关键词： Plasma electrolytic oxidation Polytetrafluoroethylene Composite coatings Corrosion Wear superhydrophobicity

Enthalpy of formation of quasicrystalline phase and ternary solid solutions in the Al-Fe-Cu system

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2006年第5期25卷 608-613页

作者： I.A.Tomilin s.D.Kaloshkin v.v.Tcherdyntsev Moscow state Institute of steel and Alloys (Technologycal University) 119049 Leninsky prosp.4MoscowRussia

standard enthalpies of formation of quasicrystalline phase and the ternary solid solutions in the Al-Fe-Cu system and the intermetaUic compound FeAI were determined by the means of solution calorimetry. The quasicrystalline phase was prepared using two different methods. The first method （I） consisted of ball milling the mixture of powders of pure aluminum copper and iron in a planetary mill with subsequent compacting by hot pressing and annealing. The second method （Ⅱ） consisted of arc melting of the components in argon atmosphere followed by annealing. The latter method was used for preparing the compound FeAl and the solid solutions. The phases were identified using the XRD method. The enthalpy of the formation was determined for the quasicrystalline phase of the composition Al62Cu25.5Fe12.5 and the temary BCC solid solutions Al35Cu14Fe51, Al40Cu17Fe43, and Al50.4Cu19.6Fe30. The measured enthalpy of formation of the intermetallic compound FeAl is in good agreement with the earlier published data. The enthalpies of formation of the quasicrystalline phases prepared using two different methods are close to each other, namely, -22.7±3.4 （method I） and -21.3±2.1 （method Ⅱ） kJ/mol.

关键词： enthalpy of formation calorimetry quasicrystals Al-Fe-Cu

Effect of Processing Parameters on Crystal Orientation of Microstructure in High Niobium-Bearing Microalloyed steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and steel Research International 2011年第S1期18卷 466-470页

作者： subramanian s v McMaster University HamiltonOntarioCanada

The present studies are aimed at understanding the effect of cooling rate and prior strain on the evolution of morphology,orientation relationship (OR) and variant selection in pipeline steel with 0.09wt% *** identical prior austenite grain,all products include granular bainite(GB) by coherent transformation,keep orientation relationship (OR) with parent *** cooling and large deformation below T nr both can raise drive force of coherent transformation and weaken variants selection,and it can generate higher frequency of high angle boundaries (HABs) (≥15degree).Moreover,large deformation by few passes below T nr can accelerate nucleation of ferrite grains at the austenite boundary by incoherent *** fine grains haven’t OR with prior austenite grain in any side of boundary,and exhibit significant misorientations between themselves.

关键词： orientation relationship EBsD low carbon bainite microalloyed steel ferrite grain

Preliminary results of lithological and palynological study of svobodny,ancient man’s parking relic in Amur region,Russia

在线全文

学校读者我要写书评

暂无评论

Global Geology 2024年第3期27卷 121-131页

作者： Kovalenko s.v. Kezina T.v. Kryuchko E.I. Mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur state University Blagoveshchensk 675027Russia

A single-layer monument svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this territory is *** time of its expansion in the Amur region is determined within the framework of the second half of theⅣmillennium BC to the first half of theⅡmillennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate