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Energy of a solid sphere under nonstationary oscillations

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 469-476页

作者： PETROv Yu. smirnov v. UTKIN A. BRATOv v. St.-Petersburg State University Institute of Problems of Mechanical Engineering Russian Academy of Sciences St.-Petersburg State Transport University

Analytical solution for spherically symmetric nonstationary oscillations of acoustic and elastic solid sphere is *** dependence of potential,kinetic and internal energy of a solid sphere is *** received results are of practical importance for a wide range of problems connected to testing of material dynamic strength parameters and to the problems of optimizing(minimizing)energy needed for fracture of solids.

关键词： nonstationary oscillations analytical solution material dynamics dynamic elastisity kinetic energy potential energy internal energy energy exchange

Potential of octant degeneracy resolution in JUNO

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Chinese Physics C 2019年第3期43卷 17-21页

作者： M.v.smirnov Zhoujun Hu Shuaijie Li Jiajie Ling Department of physics Sun Yat-Sen UniversityGuangzhou 510275China

This work extends the idea of using a cyclotron-based antineutrino source for purposes of neutrino *** baseline experiments suffer from degeneracies and correlations between Θ_(23), δ_(CP) and the mass ***, the combination of a superconducting cyclotron and a big liquid scintillator detector like JUNO in a medium baseline experiment, which does not depend on the mass hierarchy, may allow to determine whether the position of the mixing angle Θ_(23) is in the lower octant or the upper octant. Such an experiment would improve the precision of the Θ_(23) measurement to a degree which depends on the CP-phase.

关键词： neutrino oscillations octant mixing angle JUNO

Ion-conducting Membranes Based on Bacterial Cellulose Nanofibers Modified by Poly(sodium acrylate-co-2-acrylamido-2-methylpropanesulfonic acid)

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Chinese Journal of Polymer Science 2024年第3期42卷 333-343,I0007页

作者： Elizaveta v.Batishcheva Nikolay N.smirnov Natalya v.Bobrova Maria P.Sokolova Michael A.smirnov Institute of Macromolecular Compounds Russian Academy of SciencesBolshoy pr.31Saint Petersburg 199004Russia

Green method for preparation of ion-conducting membranes(ICM) based on bacterial cellulose nanofibers(CNF) modified by a copolymer of sodium acrylate and 2-acrylamido-2-methylpropanesulfonic acid was elaborated. FTIR and NMR data confirmed grafting of polyacrylate onto cellulose surface. Formation of porous structure of the ICM was controlled by SEM and AFM. The maximal ionic conductivity of the membranes reaches 1.5 and 3.1 mS·cm^(-1)(60 ℃ and 98% relative humidity) when they are saturated with water or H_2SO_4(1 mol·L^(-1)) electrolyte,respectively. Prepared ICM was tested as a separator in a symmetrical supercapacitor with electrodes based on polyaniline hydrogel. The assembled cell demonstrate ability to operate at high current density up to 100 A·g^(-1) maintaining specific capacitance 165 F·g^(-1). Maximal specific capacitance of 289 F·g^(-1) was achieved at current density 1 A·g^(-1). Retaining of 90% of initial capacitance after 10000 of charge-discharge cycles proves high electrochemical stability of prepared ICM.

关键词： Bacterial cellulose Ion conductivity Porous membrane Supercapacitor

RESULTS OF USING GPS FOR DETERMINATION OF THE EARTH IONOSPHERE ELECTRONIC DISTRIBUTION

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RESULTS OF USING GPS FOR DETERMINATION OF THE EARTH IONOSPHE...

variability in distribution of major and trace elements in Lower Eocene siliceous sections of the Transuralian Region, Russia

1996 CIE International Conference of Radar(ICR’96)

作者： ANDRIANOv v.A. MOSIN Ye.L. smirnov v.M. Institute of Radioengineering and Electronics Russian Academy of Science.103907Mokhovaya street 11MoscowRussia

＜正＞The method of determination of a high-altitude ionosphere structure of the Earth is realized on the basis of experimental measurements data of a range difference received at dual frequency supervision of system GPS. The real opportunity of reception of a ionosphere structure of the Earth is shown. The prediction of ionosphere state for various heliogeophysicals conditions is fairly

关键词： Ionospheric measurement

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Acta Geochimica 2019年第2期38卷 262-276页

作者： P.v.smirnov A.O.Konstantinov G.A.Batalin B.I.Gareev Tyumen Industrial University Technische Universit?t Clausthal Kazan Federal University

This paper presents lithologic and geochemical data from the sequence of the Eocene Irbit formation siliceous rocks(Transuralian Region) outcropping in a quarry in the Irbit deposit(thickness of 15 m) and in a large natural outcrop, Belaya Gorka(thickness of 13 m). The data show that both outcrops are composed of diatomites and clayey diatomites, both characterized by a certain degree of lithologic heterogeneity around their chemical,granulometric, and mineralogical compositions;microstructural features; and degree of diatom preservation. The values of indices important for the classification of siliceous rocks and determination of prospects for their industrial application—SiO_2, Al_2O_3, Fe_2O_3, and clay fraction content—ranged from 66% to 77%, 7% to 14%,3.00% to 5.60%, and 23% to 50%, respectively. In all studied lithologic varieties, element abundances of v, Cr,Mn, Co, Ni, Cu, Zn, Ga, Ge, and Sb were two to three times higher than their respective abundances in the Earth's crust. This is probably related to these elements' involvement in the biological cycle and favorable conditions for transport. Rb, Cs, Ba, and Sr, as well as rare earth elements,are considered the most reliable indicators of lithologic and geochemical subdivision of a sequence of siliceous rocks,as they are associated mainly with clayey minerals. variations in these indicators have recorded, with great probability, even short-term cycles and semi-cycles of silicasedimentation in the Transuralian Region, as well as tectonic regime and involvement of terrigenous influx.

关键词： Diatomite Clayey diatomite Irbit formation Eocene Geochemical variability

ESTIMATION OF DENSITY AND DETONATION vELOCITY OF TETRAZOLE Co（Ⅲ）COMPLEXES

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含能材料 1994年第1期 16-20页

作者： IIushin M A smirnov A v Kotomin A A TselynskyI v (Institute of Technology, Russia)

ＥＳＴＩＭＡＴＩＯＮＯＦＤＥＮＳＩＴＹＡＮＤＤＥＴＯＮＡＴＩＯＮＶＥＬＯＣＩＴＹＯＦＴＥＴＲＡＺＯＬＥＣｏ（Ⅲ）ＣＯＭＰＬＥＸＥＳＩＩｕｓｈｉｎＭＡＳｍｉｒｎｏｖＡＶＫｏｔｏｍｉｎＡＡＴｓｅｌｙｎｓｋｙＩＶ（Ｉｎｓｔ... 详细信息

ＥＳＴＩＭＡＴＩＯＮＯＦＤＥＮＳＩＴＹＡＮＤＤＥＴＯＮＡＴＩＯＮＶＥＬＯＣＩＴＹＯＦＴＥＴＲＡＺＯＬＥＣｏ（Ⅲ）ＣＯＭＰＬＥＸＥＳＩＩｕｓｈｉｎＭＡＳｍｉｒｎｏｖＡＶＫｏｔｏｍｉｎＡＡＴｓｅｌｙｎｓｋｙＩＶ（ＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ...

关键词： tertrazole Co(Ⅲ)coordination complex density detonation veloci-ty calculation method.

Dynamic failure of dry and fully saturated limestone samples based on incubation time concept

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第1期9卷 125-134页

作者： Yuri v. Petrov Ivan v. smirnov Grigory A. volkov Andrei K. Abramian Anatoliy M. Bragov Stanislav N. verichev Saint Petersburg University Universitetskaya nab. 7-9 Saint Petersburg 199034 Russia Institute of Problems of Mechanical Engineering Russian Academy of Sciences Bolshoj pr. 61 V.O. Saint Petersburg 199178 Russia Lobachevsky State University of Nizhni Novgorod Prospekt Gagarina 23 Nizhny Novgorod 603950 Russia Allseas Engineering B.v. Poortweg 12 Delft 2612 PA The Netherlands

This paper outlines the results of experimental study of the dynamic rock failure based on the comparison of dry and saturated limestone samples obtained during the dynamic compression and split tests. The tests were performed using the Kolsky method and its modifications for dynamic splitting. The mechanical data(e.g. strength, time and energy characteristics) of this material at high strain rates are obtained. It is shown that these characteristics are sensitive to the strain rate. A unified interpretation of these rate effects, based on the structuraletemporal approach, is hereby presented. It is demonstrated that the temporal dependence of the dynamic compressive and split tensile strengths of dry and saturated limestone samples can be predicted by the incubation time criterion. Previously discovered possibilities to optimize(minimize) the energy input for the failure process is discussed in connection with industrial rock failure processes. It is shown that the optimal energy input value associated with critical load, which is required to initialize failure in the rock media, strongly depends on the incubation time and the impact duration. The optimal load shapes, which minimize the momentum for a single failure impact, are demonstrated. Through this investigation, a possible approach to reduce the specific energy required for rock cutting by means of high-frequency vibrations is also discussed.

关键词： Dynamic strength Incubation time criterion Split Hopkinson pressure bar(SHPB) test Tensile strength Compressive strength Water-saturated limestone vibration-assisted rock cutting

Detonation Propagation in 180° Ribs of an Insensitive High Energy Explosive

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含能材料 2004年第A2期12卷 345-347页

作者： S.N.Lubyatinsky A.Yu.Garmashev v.G.Israelyan O.v.Kostitsin B.G.Loboiko v.A.Pashentsev v.A.Sibilev E.B.smirnov v.P.Filin RFNC-vNIITF SnezhinskChelyabinskregion456770RUSSIA

Steady detonation regimes, such as the detonation of explosive rate sticks, are of particular interest in studies of explosive reaction kinetics. If this is the case the detonation front shape as well as the fields of particle velocity, pressure etc. are steady in the system of coordinates linked to the detonation front. This facilitates the analysis of the experimental data obtained to verify or calibrate various detonation models.

关键词：高能炸药爆炸传播动力学粒子速率

Self-healable and Robust Film Based on Electroactive Polymer Brush as Electrode for Flexible Supercapacitor

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Chinese Journal of Polymer Science 2024年第8期42卷 1049-1059页

作者： Maria P.Sokolova vitaly K.vorobiov Nikolay N.smirnov Ivan S.Kuryndin Natalya v.Bobrova Michael A.smirnov Institute of Macromolecular Compounds Russian Academy of SciencesBolshoy pr.31Saint Petersburg 199004Russia

The aim of this study was to develop self-healable and robust elect roconductive film based on polyaniline copolymer for application as electrode in flexible *** this purpose,the electroconductive polymer brushes(EPB)was *** synthesis of EPB is based on graft polymerizations of acrylamide(AAm)on poly(vinyl alcohol)(PvA)with formation of PvA-PAAm polymer brush and subsequent graft copolymerization of aniline and p-phenylenediamine on PvA-PAAm resulting in formation of EPB with electroconducting copoly(aniline-co-pphenylenediamine)(PAPh DA).It was found that the ratio between PvA and PAAm at the first stage greatly influence the electrochemical performance of the *** films were prepared by casting of EPB solution with subsequent *** of electrical current distribution through the film with AFM reveal more uniform distribution of PAPhDA in EPB in comparison with reference PvA-PAPhDA and PAAm-PAPhDA *** was demonstrated that mechanical cha racteristics and electrical conductivity values of films restore at large extent after curring and self-healing under optimal relative humidity level(58%).The flexile supercapacitor cell with EPB film electrodes demon strate specific capacitance 602 mF·cm^(-2)at the current density of 1 mA·cm^(-2)and retention 94%of initial capacitance after 5000 charge/discharge cycles.

关键词： Polymer brush Polyaniline Flexible supercapacitor Self-healing Electroconducting film