检索结果-南通市图书馆

Polariton lasing in mie-resonant perovskite nanocavity

在线全文

学校读者我要写书评

暂无评论

Opto-Electronic Advances 2024年第4期7卷 27-42页

作者： mikhail A.masharin Daria Khmelevskaia Valeriy I.Kondratiev Daria I.markina Anton D.Utyushev Dmitriy m.Dolgintsev Alexey D.Dmitriev Vanik A.Shahnazaryan anatoly P.Pushkarev Furkan Isik Ivan V.Iorsh Ivan A.Shelykh Hilmi V.Demir Anton K.Samusev Sergey V.makarov UNAm-Institute of materials Science and Nanotechnology National Nanotechnology Research CenterDepartment of Electrical and Electronics EngineeringDepartment of PhysicsBilkent UniversityAnkara 06800Turkey ITmO University School of Physics and EngineeringSt.Petersburg 197101Russia Abrikosov Center for Theoretical Physics MIPTDolgoprudnyiMoscow Region 141701Russia LUmINOUS!Center of Excellence for Semiconductor Lighting and Displays School of Electrical and Electronic EngineeringSchool of Physical and Mathematical SciencesSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Department of Physics Engineering Physics and AstronomyQueen’s UniversityKingstonOntario K7L 3N6Canada Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Experimentelle Physik 2 Technische Universität DortmundDortmund 44227Germany Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China

Deeply subwavelength lasers(or nanolasers)are highly demanded for compact on-chip bioimaging and sensing at the *** of the main obstacles for the development of single-particle nanolasers with all three dimensions shorter than the emitting wavelength in the visible range is the high lasing thresholds and the resulting *** we ex-ploit exciton-polariton condensation and mirror-image mie modes in a cuboid CsPbBr3 nanoparticle to achieve coherent emission at the visible wavelength of around 0.53μm from its ultra-small(≈0.007μm3 or≈λ3/20)semiconductor *** polaritonic nature of the emission from the nanocavity localized in all three dimensions is proven by direct com-parison with corresponding one-dimensional and two-dimensional waveguiding systems with similar material *** a deeply subwavelength nanolaser is enabled not only by the high values for exciton binding energy(≈35 meV),re-fractive index(>2.5 at low temperature),and luminescence quantum yield of CsPbBr3,but also by the optimization of po-laritons condensation on the mie resonances with quality factors improved by the metallic ***,the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr3,which govern polaritons condensation *** chemically synthesized colloidal CsPbBr3 nanolasers can be potentially de-posited on arbitrary surfaces,which makes them a versatile tool for integration with various on-chip systems.

关键词： nanolaser perovskite polariton mie resonance exciton-polariton

3,6-bis(2,2,2-trinitroethylnitramino)-1,2,4,*** and energy abilities as a component of solid composite propellants

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第7期18卷 1148-1155页

作者： anatoly G.Korepin Natalia m.Glushakova David B.Lempert anatoly I.Kazakov Gennady V.Shilov Denis V.Korchagin Vadim m.Volokhov Elena S.Amosova Sergey m.Aldoshin Institute of Problems of Chemical Physics Ac.Semenov Avenue 1Chernogolovka142432Russian Federation

The work addresses to the study of the molecular and crystal structure and properties of a new energyintensive compound 3,6-bis(2,2,2-trinitroethylnitramino)-1,2,4,5-tetrazine(NBTAT),first obtained by the authors in *** compound crystallizes in the monoclinic system,space group P2(1)/n,density at room temperature 1.939 g/cm^(3).The energies of crystal packing and pairwise intermolecular interactions in NBTAT and its unnitrated analogue BTAT were calculated,and their comparative analysis was carried *** enthalpy of formation of NBTAT molecules was calculated by quantum-chemical methods using Gaussian 09,and the enthalpy of formation of NBTAT in the solid phase(618 kJ/mol)was *** energy capabilities of NBTAT as an oxidizer of solid composite propellants are *** is shown that in metal-free compositions NBTAT is significantly superior to ammonium perchlorate(AP),dinitramide ammonium salt(ADN),HmX,BTAT at all stages of rocket systems,and is comparable to the superdense CL-20 yielding to the latter at the lower stages and slightly winning at the upper stages.

关键词： Nitrogen heterocycles Quantum chemistry Enthalpy of formation 3,6-bis(2,2,2-trinitroethylnitramino)-1,2,4,5-tetrazine Crystal structure Energetic ability

Impact of drilling waste pollution on land cover in a high subarctic forest-tundra zone

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2022年第3期32卷 414-425页

作者： anatoly OPEKUNOV marina OPEKUNOVA Stepan KUKUSHKIN Sergey LISENKOV Institute of Earth Sciences St.Petersburg State UniversitySt.Petersburg 199178(Russia)

Global climate changes can lead to the destruction of the permafrost zone and contribute to the active transfer of pollutants to natural *** can be especially pronounced in the areas of oil and gas production in the *** study aimed to define the landscape components(i.e.,groundwater,soil water,soil,and indicator plant species)of chemical pollution with metals,oil hydrocarbons,and polycyclic aromatic hydrocarbons,from the discharge of drill *** at two sites in the forest-tundra zone of Western Siberia(Russia)were carried out within two years of *** migration was found in peaty-gley heavy loamy soils and iron-illuvial clayey podburs,but lateral migration of different pollutants did not exceed 200 ***,radial migration was practically absent owing to the high buffering capacity of the soil organic horizon and the upward flow of matter in the seasonal melt *** main indicators of drilling waste pollution were high concentrations of Sr,Ba,petroleum hydrocarbons,and Cl^(-)*** the waste disposal sites,the concentration of Ba and Sr in the soil water were 1150 and 1410μg L^(-1),respectively;in groundwater,they reached 721 and 2360μg L^(-1),*** the soil,Ba and Sr accumulated in the peaty horizon(798 and 706 mg kg^(-1),respectively).The concentration of Cl^(-)ions in the soil water at the site of waste discharge was 1912 mg L^(-1),and at a distance of 200 m,it decreased to 77.4 mg L^(-1).The Cl^(-)concentration in the groundwater was lower,and at a distance of 200 m,it was 38.9 mg L^(-1).The highest concentration of petroleum hydrocarbons in the surface layer was found in the peaty-gley soils(up to 2400 mg kg^(-1)).In glandular-illuvial podburs,it was 420 mg kg^(-1).In horizons BH and BC,it was close to the background values(27 and 33 mg kg^(-1),respectively).Alkalinization of soils and water under the influence of drill cuttings led to the death of oligotrophic and acidophilic vegetation at a distanc

关键词： metal petroleum hydrocarbons plant indicator species pollutant migration in soil polycyclic aromatic hydrocarbon

Strain-Rate Dependency of a Unidirectional Filament Wound Composite under Compression

在线全文

学校读者我要写书评

暂无评论

Computer modeling in Engineering & Sciences 2023年第12期137卷 2149-2161页

作者： Stepan Konev Victor A.Eremeyev Hamid m.Sedighi Leonid Igumnov anatoly Bragov Aleksandr Konstantinov Ayaulym Kuanyshova Ivan Sergeichev Skolkovo Institute of Science and Technologies Center for Materials TechnologiesMoscowRussia National Research Lobachevsky State University of Nizhny Novgorod Nizhny NovgorodRussia Dipartimento di Ingegneria Civile Ambientale e Architettura(DICAAR)Universitàdegli Studi di CagliariCagliari(CA)Italy mechanical Engineering Department Faculty of EngineeringShahid Chamran University of AhvazAhvazIran Drilling Center of Excellence and Research Center Shahid Chamran University of AhvazAhvazIran

This article presents the results of experimental studies concerning the dynamic deformation and failure of a unidirectional carbon fiber reinforced plastic(T700/LY113)under *** test samples were manufactured through the filament winding of flat *** establish the strain rate dependencies of the strength and elastic modulus of the material,dynamic tests were carried out using a drop tower,the Split Hopkinson Pressure Bar method,and standard static *** samples were loaded both along and perpendicular to the direction of the reinforcing *** applicability of the obtained samples for static and dynamic tests was confirmed through finite elementmodeling and the high-speed imaging of the deformation and failure of samples during *** a result of the conducted experimental studies,static and dynamic stress-strain curves,time dependencies of deformation and the stress and strain rates of the samples during compression were *** on these results,the strain rate dependencies of the strength and elasticity modulus in the strain rate range of 0.001-6001/s are *** is shown that the strain rate significantly affects the strength and deformation characteristics of the unidirectional carbon fiber composites under *** increase in the strain rate by 5 orders of magnitude increased the strength and elastic modulus along the fiber direction by 42%and 50%,*** loading resulted in a strength and elastic modulus increase by 58%and 50%,*** average strength along the fibers at the largest studied strain rate was about *** obtained results can be used to design structural elements made of polymer composite materials operating under dynamic shock loads,as well as to build models of mechanical behavior and failure criteria of such materials,taking into account the strain rate effects.

关键词： High strain rate composites filament winding dynamic strength Split Hopkinson Pressure Bar compression

Paleoproterozoic Underwater Volcanism and microfossil-Like Structures in the metasedimentary Siliceous Rocks,Hogland Island,Russia

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2018年第6期29卷 1431-1442页

作者： anatoly m.Belyaev Institute of Earth Sciences St.Petersburg State University

Geological surveys showed that rhyolite and basalt strata with pillow structures typical for underwater volcanism form sheets over the Svecofennian basement. Original geochemical and isotope-geochemical data confirmed that the rhyolites were formed contemporaneously with the rapakivi granites of the Wiborg massif（1 640 ma）, and the basalts are similar to gabbro-anorthosites. Abnormally high content of K2O and relatively low content of Na2O in rhyolites and basalts are interpreted as a result of hydrothermal interaction of eruptive magmas with K-enriched hot seawater. The strata of siliceous metasedimentary rocks（microquartzites） within basaltic and rhyolitic lavas were formed in processes of chemogenic sedimentation and subsequent contact metamorphism during underwater volcanism. microquartzites showed carbon vastly depleted of heavy isotope 13С. This is typical for rocks formed with participation of living substance. The Raman spectra of the remaining carbon-containing substance have graphite bands. In the microquartzites among basalts and rhyolites we found a community of structures with external and internal morphology similar to modern or fossilized marine microorganisms： spiral cyanobacterias, amoebas, diatoms, foraminifers, virus capsids, flagellates and multicellular organisms. It is assumed that these silificated and ferruginizated microfossils represent the Paleoproterozoic community of marine microorganisms.

关键词： submarine volcanism siliceous rocks silification Paleoproterozoic microfossils carbon isotopes

Characteristics of shallow gas hydrate in Okhotsk Sea

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2008年第3期51卷 415-421页

作者： anatoly OBZHIROV V.I. Il’ichev Pacific Oceanological Institute of the Far Eastern Branch of Russian Academy of Sciences

multidisciplinary field investigations were carried out in Okhotsk Sea by R/V Akademik m.A. Lavrentyev (LV) of the Russian Academy of Sciences (RAS) in may 2006, supported by funding agencies from Ko- rea, Russia, Japan and China. Geophysical data including echo-sounder, bottom profile, side-scan- sonar, and gravity core sample were obtained aimed to understand the characteristics and formation mechanism of shallow gas hydrates. Based on the geophysical data, we found that the methane flare detected by echo-sounder was the evidence of free gas in the sediment, while the dome structure de- tected by side-scan sonar and bottom profile was the root of gas venting. Gas hydrate retrieved from core on top of the dome structure which was interbedded as thin lamination or lenses with thickness varying from a few millimeters to 3 cm. Gas hydrate content in hydrate-bearing intervals visually amounted to 5%―30% of the sediment volume. This paper argued that gases in the sediment core were not all from gas hydrate decomposition during the gravity core lifting process, free gases must existed in the gas hydrate stability zone, and tectonic structure like dome structure in this paper was free gas central, gas hydrate formed only when gases over-saturated in this gas central, away from these struc- tures, gas hydrate could not form due to low gas concentration.

关键词： Okhotsk Sea shallow gas hydrates free gas dome structure

Age and Geochemical Characteristics of major mafic Dyke Swarms in the Southern Part of the Siberian Craton

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2016年第S1期90卷 125-126页

作者： Tatiana V.DONSKAYA Dmitry P.GLADKOCHUB Richard E.ERNST Sergei A.PISAREVSKY Anatoliy m.mazukabzov Ulf SODERLUND michael T.D.WINGATE michael A.HAmILTON Elena I.DEmONTEROVA Institute of the Earth’s Crust Siberian Branch of the Russian Academy of Sciences Department of Earth Sciences Carleton University Faculty of Geology and Geography Tomsk State University Australian Research Council Centre of Excellence for Core to Crust Fluid Systems(CCFS)and the Institute for Geoscience Research(TIGe R) Department of Applied GeologyCurtin University School of Earth and Environment University of Western Australia GeoB iosphere Science Centre Department of GeologyUniversity of Lund Geological Survey of Western Australia Department of Earth Sciences University of Toronto

Several generations of mafic dyke swarms of different ages and geochemical characteristics cut Precambrian rocks of the southern part of the Siberian craton(Irkutsk Promontory).Each generation of dykes is related to a

关键词： Age and Geochemical Characteristics of major mafic Dyke Swarms in the Southern Part of the Siberian Craton ppm

Cohomology of bundles on homological Hopf manifolds

在线全文

学校读者我要写书评

暂无评论

Science China mathematics 2009年第12期52卷 2688-2698页

作者： LIBGOBER anatoly Department of mathematics University of IllinoisChicagoIL 60607USA

We discuss the properties of complex manifolds having rational homology of S1×S2n-1 including those constructed by Hopf,Kodaira and Brieskorvan de *** extend certain previ- ously known properties of cohomology of bundles on such *** an application we consider degeneration of Hodge–de Rham spectral sequence in this non Kahler setting.

关键词： Hopf manifolds cohomology of vector bundles local systems universal covers Stein spaces

Slow Retrial Asymptotics for a Single Server Queue with Two-Way Communication and markov modulated Poisson

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2019年第2期28卷 181-193页

作者： anatoly Nazarov Tuan Phung-Duc Svetlana Paul Institute of Applied mathematics and Computer Science National Research Tomsk State University 36 Lenina ave. 634050 Tomsk Russian Federation Faculty of Engineering Information and Systems University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8573 Japan

In this paper, we consider an mmPP/m/1/1 retrial queue where incoming fresh calls arrive at the server according to a markov modulated Poisson process (mmPP). Upon arrival, an incoming call either occupies the server if it is idle or joins a virtual waiting room called orbit if the server is busy. From the orbit, incoming calls retry to occupy the server in an exponentially distributed time and behave the same as a fresh incoming call. After an exponentially distributed idle time, the server makes an outgoing call whose duration is also exponentially distributed but with a different parameter from that of incoming calls. Our contribution is to derive the first order (law of large numbers) and the second order (central lim让 theorem) asymptotics for the distribution of the number of calls in the orb计 under the condition that the retrial rate is extremely low. The asymptotic results are used to obtain the Gaussian approximation for the distribution of the number of calls in the orbit. Our result generalizes earlier results where Poisson input was assumed.

关键词： Retrial queueing system incoming calls and outgoing calls mmPP-process asymptotic analysismethod gaussian approximation