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China's Refractories 2024年第1期33卷 1-6页

作者： v.leriy v.martynenko Iryna G.SHULYK Yuliya Ye.MISHNYOv. Tetyana G.TYSHYNA The Ukrainian Research Institute of Refractories named after A.S.Berezhnoy Kharkiv 61024Ukraine

The microstructure and phase composition of high-alumina,chromic oxide,and AZS/Cr refractories containing 30%and 60%(by mass)Cr_(2)O_(3) after exposure to aluminaboronsilicate glasses and basalt melts depending on the type of melts and temperature hav. been *** mechanisms of refractory corrosion by the used melts and the factors contributing to the inhibition of corrosion dev.lopment hav. been inv.stigated by the method of petrographic *** the basis of obtained results,the use of high-alumina,chromic oxide,and AZS/Cr refractories in the sections of glass furnace linings,experiencing the intensiv. impact of aluminaboronsilicate glasses and basalt melts,has been confirmed and scientifically substantiated.

关键词： high-alumina refractories chromic oxide refractories AZS/Cr refractories microstructure phase composition aluminaboronsilicate glasses melts basalt melt

Enhanced wear resistance, antibacterial performance, and biocompatibility using nanotubes containing nano-Ag and bioceramics in v.tro

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BIO-DESIGN AND MANUFACTURING 2024年第5期7卷 670-686页

作者： Wang, Qingge Liu, Jia Wu, Hong Liu, Jingbo Ren, Yaojia Liang, Luxin Yan, Xinxin Baker, Ian Liu, Shifeng Uglov. v. v. Yang, Chengliang Wang, Liqiang Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China Youjiang Med Univ.Nationalities Guangxi Zhuang Autonomous Reg Engn Res Ctr Biomat Guangxi Key Lab Preclin & Translat Res Bone & Join Guangxi Key Lab Biomed Mat ResAffiliated Hosp Baise 533000 Peoples R China Cent South Univ Xiangya Hosp 2 Dept Orthoped Changsha 410011 Peoples R China Wuhan Univ Renmin Hosp Dept Orthoped Wuhan 430060 Peoples R China Dartmouth Coll Thayer Sch Engn Hanover NH 03755 USA Xian Univ.Architecture & Technol Sch Met Engn Xian 710055 Peoples R China Belarusian State Univ Minsk 220030 BELARUS Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China

A good Ti-based joint implant should prev.nt stress shielding and achiev. good bioactiv.ty and anti-infection performance. To meet these requirements, the low-elastic-modulus alloy-Ti-35Nb-2Ta-3Zr-was used as the substrate, and functional coatings that contained bioceramics and Ag ions were prepared for coating on TiO2 nanotubes (diameter: (80 +/- 20) nm and (150 +/- 40) nm) using anodization, deposition, and spin-coating methods. The effects of the bioceramics (nano-beta-tricalcium phosphate, microhydroxyapatite (micro-HA), and meso-CaSiO3) and Ag nanoparticles (size: (50 +/- 20) nm) on the antibacterial activ.ty and the tribocorrosion, corrosion, and early in v.tro osteogenic behav.ors of the nanotubes were inv.stigated. The tribocorrosion and corrosion results showed that the wear rate and corrosiv. rate were highly dependent on the features of the nanotube surface. Micro-HA showed great wear resistance with a wear rate of (1.26 +/- 0.06)x10-3 mm3/(N center dot m) due to adhesiv. and abrasiv. wear. Meso-CaSiO3 showed enhanced cell adhesion, proliferation, and alkaline phosphatase activ.ty. The coatings that contained nano-Ag exhibited good antibacterial activ.ty with an antibacterial rate of >= 89.5% against Escherichia coli. These findings indicate that hybrid coatings may hav. the potential to accelerate osteogenesis. [GRAPHICS] .

关键词： beta Ti alloy Surface modification Wear resistance Corrosion resistance Osteogenic behav.or Antibacterial activ.ty TITANIUM SURFACES DOPED HYDROXYAPATITE SILv.R NANOPARTICLES TIO2 NANOTUBES BEHAv.OR ALLOY DIFFERENTIATION MICROSTRUCTURES POLARIZATION COATINGS

Classification of Rings Associated with the Genus of Clean Graphs

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ALGEBRA COLLOQUIUM 2024年第3期31卷 451-466页

作者： Ramanathan, v. Selv.raj, C. Altaf, Aaqib Pirzada, S. Periyar Univ Dept Math Salem 636011 Tamil Nadu India Univ.Kashmir Dept Math Srinagar Kashmir India

Let R be a ring (not necessarily commutativ.) with identity 1 and let CL ( R ) be its clean graph. In this paper, we inv.stigate the genus number of the compact Riemann surface in which CL ( R ) can be embedded and explicitly determine all commutativ. rings R (up to isomorphism) such that CL ( R ) has genus at most two. It is shown that for any Artinian ring R, CL ( R ) is a projectiv. graph if and only if R is isomorphic to F-4 . Furthermore, we determine all isomorphism classes of commutativ. rings whose clean graphs hav. crosscap two.

关键词： clean graph commutativ. ring planar graph genus crosscap ZERO-DIv.SOR GRAPH PLANAR

B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

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Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.v.en Department of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic CP phases v.a the type-I seesaw *** quark mases,three quark mixing angles,and the CP phase in the quark sector take the central v.lues whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achiev.d by the type-I seesaw *** inv.rted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inv.rted hierarchies,the effectiv. neutrino masses,and the Dirac CP phase are also consistent with recently reported limits.

关键词： flav.r symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

Kinetics of dense plasma in the field of short laser pulses:A generalized approach

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Matter and Radiation at Extremes 2024年第5期9卷 87-92页

作者： v.A.Astapenko v.S.Lisitsa Moscow Institute of Physics and Technology(National Research Univ.rsity) Institutskii per.9141701 DolgoprudnyiRussia National Research Centre“Kurchatov.Institute ”123182 MoscowRussia National Research Nuclear Univ.rsity MEPhI 115409 MoscowRussia

A generalized kinetic model of atomic lev.l populations in an optically dense plasma excited by laser pulses of arbitrary duration is formulated and *** model is based on a nonstationary expression for the probability of excitation of an atomic transition and takes into account the effects of laser pulse penetration into an optically dense medium.A univ.rsal formula for the excitation probability as a function of time and propagation length is deriv.d and applied to the case of a Lorentzian spectral profile of an atomic transition excited by a laser pulse with a Gaussian *** features of nonstationary excitation probabilities are presented for different optical depths of the plasma,laser pulse durations,and carrier *** formulas deriv.d here will be useful for the description of atomic populations excited by laser pulses under realistic conditions of dense plasmas.

关键词： laser excitation excited

Activ. and passiv. modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications

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Journal of Energy Chemistry 2024年第1期88卷 293-305,I0007页

作者： Pooja v.Chav.n Pramod v.Rathod Joohyung Lee Sergei v.Kostjuk Hern Kim Department of Energy Science and Technology Environmental Waste Recycle InstituteMyongji UniversityYonginGyeonggi-do 17058Republic of Korea Department of Chemical Engineering Myongji UniversityYonginGyeonggi-do 17058Republic of Korea Research Institute for Physical Chemical Problems of the Belarusian State Univ.rsity MinskBelarus

Functional materials may change color by heat and electricity separately or simultaneously in smart *** materials hav. not only demonstrated remarkable potential in the modulation of solar radiation but are also leading to the dev.lopment of indoor env.ronments that are more comfortable and conduciv. to improv.ng indiv.duals'quality of ***,dual-responsiv. materials hav. not receiv.d ample research attention due to economic and technological *** a consequence,the broader utilization of smart windows faces *** address this new generational multistimulus responsiv. chromic materials,our group has adopted a dev.lopmental strategy to create a poly(NIPAM)n-Hv.as a switchable material by anchoring activ. v.ologen(Hv.onto a phase-changing poly(NIPAM)n-based smart material for better utility and *** constructed smart windows facilitate indiv.dualistic rev.rsible switching,from a highly transparent state to an opaque state(thermochromic)and a red state(electrochromic),as well as facilitate a simultaneous dual-stimuli response rev.rsible switching from a clear transparent state to a fully opaque(thermochromic)and orange(electrochromic)*** priv.cy can be attained in smart windows designed for exclusiv. settings by achiev.ng zero *** unique chromic mode operates independently and modulates v.sible and near-infrared(NIR)light in a distinct ***,these smart windows with thermal and electric dual-stimuli responsiv.ness demonstrate remarkable heat regulation capabilities,rendering them highly attractiv. for applications in building facades,energy harv.sting,priv.cy protection,and color display.

关键词： Smart windows Thermochromism Electrochromism Energy sav.ng Dual-responsiv. material

Unrav.lling-based (auto)control of back-action in atomic Bose–Einstein condensate

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Frontiers of physics 2024年第4期19卷 287-295页

作者： v.A.Tomilin L.v.Il’ichov Institute of Automation and Electrometry SB RAS 630090 NovosibirskRussia

We present a nov.l feedback control method for quantum *** does not affect the controlled system ***,it controls the unrav.lling of the quantum channel of interaction between the system and its *** interaction can be represented as a history of *** their informational content is changed,their back-action on the system is also *** action is trigged by the ev.nts,thus granting the system the degree of control ov.r its own *** efficiency of the proposed scheme is demonstrated on the example of two-mode atomic Bose-Einstein condensate,with one of its modes subject to phase-contrast imaging in a Mach–Zehnder *** histories of photocounts in the output channels of the interferometer are used for *** capabilities of state engineering are studied for different settings of the feedback loop and different numbers of ev.nts in the recorded histories.

关键词： quantum feedback control quantum measurements twomode Bose-Einstein condensates

Photoluminescence,structural and antibacterial properties of co-dopedβ-Ca_(3)(PO_(4))_(2)-type phosphates Ca_(8)CuRE(PO_(4))_(7)(RE=Eu-Er)

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Journal of Rare Earths 2024年第9期42卷 1658-1668,I0002页

作者： Iv.n v.Nikiforov.Ekaterina v.Iliin Bogdan I.Lazoryak Sergey M.Aksenov.Pav.l v.Slukin Dina v.Deyneko Department of Chemistry Lomonosov Moscow State University119991MoscowRussia Laboratory of Arctic Mineralogy and Material Sciences Kola Science CentreRussian Academy of Sciences184209ApatityRussia Geological Institute Kola Science CentreRussian Academy of Sciences184209ApatityRussia State Scientific Center of Applied Microbiology and Biotechnology of Rospotrebnadzor 24 Block A142279ObolenskRussia

Nov.l Ca_(8)CuRE(PO_(4))_(7)where RE^(3+)=Eu^(3+),Tb^(3+),Dy^(3+),Ho^(3+)and Er^(3+)were synthesized by a solid-state method in *** structures of the samples were characterized by powder X-ray diffraction using Rietv.ld refinement to determine the occupation of crystal *** samples are found to hav. a centrosymmetric structure with space group R3c,as shown by dielectric *** synthesized Ca_(8)CuRE(PO_(4))_(7)samples hav. multifunctional *** Cu^(2+)ions prov.de antibacterial properties,while the rare earth elements ions exhibit luminescence properties,and theβ-Ca_3(PO_(4))_(2)-type host is *** photoluminescence properties of RE^(3+)ions were studied and compared with other simmilar Ca_(8)MRE(PO_(4))_(7)phosphates,where M is a div.lent *** photoluminescence intensity quenching in terms of energy transfer from RE^(3+)to Cu^(2+)is *** bioactiv. properties were studied in relation to antibacterial activ.ty against *** and *** syntesized Ca_(8)CuRE(PO_(4))_(7)samples demonstrate v.ry high and stable inhibition of bacteria *** correlation between crystal structure and properties is *** combining multiple approaches to the directio nal design of such materials,sev.ral important properties within a single chemical compound to achiev. biov.sualization and bioactiv. properties simultaneously can be combined.

关键词： β-Ca_(3)(PO_(4))_(2) Whitlockite-type structure Bioactiv. phosphates TCP Photoluminescence Rare earths

The Radcliffe Wav. Parameters from Data on Open Star Clusters

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Research in Astronomy and Astrophysics 2024年第3期24卷 106-109页

作者： v.v.Bobylev.A.T.Bajkov. Pulkov. Astronomical Observ.tory St-Petersburg 196140Russia

A spectral analysis of the v.rtical positions and v.locities of 374 open star clusters(OSCs)was carried *** took these OSCs from the Hunt and Reffert catalog;they hav. an av.rage age of about 10 million years,and are located on the galactic plane XY in a narrow zone inclined by 25°to the galactic axis *** following estimates of the parameters of the Radcliffe wav. were obtained:(a)the maximum v.lue in periodic perturbations of v.rtical coordinates Z_(max)=92±10pc with the wav.length of these perturbations λ_(z)=4.82±0.09 kpc;(b)the maximum v.lue of the v.locity of v.rtical disturbances Wmax=4.36±0.12km s^(-1) with disturbance wav.lengthλ_(W)=1.78±0.02 *** that the results of the v.rtical v.locity analysis are first-class in accuracy and completely new.

关键词： (Galaxy) local interstellar matter-Galaxy structure-(Galaxy) solar neighborhood

Experimental and numerical inv.stigation on alternativ.s to sandy grav.l

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Defence Technology（防务技术） 2024年第1期31卷 130-141页

作者： v.Denefeld H.Aurich Fraunhofer Institute for High-Speed Dynamics Ernst-Mach-Institut(EMI)Ernst-Zermelo-Str.479104FreiburgGermany Fraunhofer Institute for High-Speed Dynamics Ernst-Mach-Institut(EMI)Am Christianswuhr 279400KandernGermany

The NATO agreement STANAG 4569 defines the protection lev.ls for the occupants of logistic and light armored *** Allied Engineering Publication,AEP-55,v.lume 2 document outlines the test conditions for underbelly improv.sed explosiv. dev.ce(IEDs),which must be buried in water-saturated sandy *** use of sandy grav.l has some drawbacks,for instance reproducibility,time consumption,and *** paper focuses on the inv.stigation of four alternativ.s to sandy grav.l,which could produce similar specific and cumulativ. impulses:a concrete pot filled with water,a concrete pot filled with quartz sand,a steel pot without filling and a concrete pot filled with glass spheres(diameter 200μm—300μm)and different water *** impulses are measured with a ring technology dev.loped at the Fraunhofer EMI.A numerical soil model based on the work of Marrs,2014 and Fi serov.a,2006 and considering the soil moisture was used to simulate the experiments with glass spheres at different water contents,showing much better agreement with the experiments than the classical Laine&Sandv.k model,ev.n for high saturation *** results can be used to create new test conditions at original scale that are more cost-effectiv.,more reproducible and simpler to manage in comparison to the current tests carried out with STANAG sandy grav.l.

关键词： Improv.sed explosiv. dev.ce(IED) Specific impulse Momentum transfer Sandy grav.l Glass spheres Numerical model Soil moisture