180 research outputs found

    Experimental Study of the Liquid Cathode Components Transfer to the DC Discharge Plasma at Atmospheric Pressure

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    The transfer processes of solvent and dissolved substances in gas phase from aqueous solutions used as cathodes under the action of atmospheric pressure DC discharge were investigated.The electric field strength in plasma (E), cathode voltage drop (Uc) and rates of solution evaporation were measured. The transfer coefficients were calculated. The effect of transfer processes on plasma physical properties was experimentally studied. The threshold characteristics of cations transfer process were determined

    Light-emitting diode with top electrode as a laminar diffraction grating

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    ΠŸΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ числСнного модСлирования Π² исслСдовании мСмристивных структур Π½Π° основС оксидов ΠΈ Ρ…Π°Π»ΡŒΠΊΠΎΠ³Π΅Π½ΠΈΠ΄ΠΎΠ²

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    Models that describe bipolar resistive switching in planar microstructures based on oxide compounds (Bi2Sr2CaCu2O8+x, Nd2-xCexCuO4-y) and bismuth selenide are considered. Metal-isolator-metal planar-type meristor heterostructures were investigated, in which the micro-size is formed by an electrode whose diameter is much smaller than the total size of the structure (it can be both Chervinsky-type microjunctions and film electric electrodes). Another important feature of these heterostructures is the presence of a surface layer several tens of nanometers thick with specific conductivity significantly reduced relative to volume. The change in the resistive properties of such heterostructures is caused by the formation or destruction of the conductive channel through the above-mentioned layer. Numerical simulation has shown that the bipolar resistive switching is significantly influenced by the electrical field distribution topology. A β€œcritical field” model is proposed to describe experimentally observed memristor effects in investigated heterostructures. In this model it is assumed that the change in specific conductivity occurs in those parts of the surface layer where the electric field strength exceeds some critical value. The model of the β€œcritical field” is based on the numerical calculation of the distribution of electrical potential on the distribution of specific conductivity in the structure. In addition, the model allowing to analyze the influence of electrodiffusion of oxygen ions on resistive switching in heterostructures based on Bi2Sr2CaCu2O8+x is considered. At numerical realization of the models a combination of the integro-differential approximation of the differential equations, the multi-grid approach for localization of heterogeneities of physical characteristics, the iterative decomposition method and composite adaptive meshes was used. It allowed tracking the processes under investigation with necessary accuracy. The comparison of simulation results with experimental data is presented.РассмотрСны ΠΌΠΎΠ΄Π΅Π»ΠΈ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΎΠΏΠΈΡΡ‹Π²Π°ΡŽΡ‚ биполярныС рСзистивныС ΠΏΠ΅Ρ€Π΅ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΡ Π² ΠΏΠ»Π°Π½Π°Ρ€Π½Ρ‹Ρ… микроструктурах, созданных Π½Π° основС оксидных соСдинСний (Bi2Sr2CaCu2O8+x, Nd2-xCexCuO4-y) ΠΈ сСлСнида висмута. Π˜ΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ‹ мСмристивныС гСтСроструктуры мСталл—изолятор—мСталл ΠΏΠ»Π°Π½Π°Ρ€ΠΎΠ³ΠΎ Ρ‚ΠΈΠΏΠ°, Π² ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… ΠΌΠΈΠΊΡ€ΠΎΡ€Π°Π·ΠΌΠ΅Ρ€ формируСтся элСктродом, Π΄ΠΈΠ°ΠΌΠ΅Ρ‚Ρ€ ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ мСньшС ΠΎΠ±Ρ‰Π΅Π³ΠΎ Ρ€Π°Π·ΠΌΠ΅Ρ€Π° структуры (это ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΈ ΠΌΠΈΠΊΡ€ΠΎΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Ρ‹ ΡˆΠ°Ρ€Π²ΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Ρ‚ΠΈΠΏΠ°, ΠΈ ΠΏΠ»Π΅Π½ΠΎΡ‡Π½Ρ‹Π΅ элСктричСскиС элСктроды). Π”Ρ€ΡƒΠ³ΠΎΠΉ Π²Π°ΠΆΠ½ΠΎΠΉ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡ‚ΡŒΡŽ этих гСтСроструктур являСтся Π½Π°Π»ΠΈΡ‡ΠΈΠ΅ повСрхностного слоя Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½ΠΎΠΉ нСсколько дСсятков Π½Π°Π½ΠΎΠΌΠ΅Ρ‚Ρ€ΠΎΠ² с ΡƒΠ΄Π΅Π»ΡŒΠ½ΠΎΠΉ ΠΏΡ€ΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡ‚ΡŒΡŽ, Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ ΠΏΠΎΠ½ΠΈΠΆΠ΅Π½Π½ΠΎΠΉ ΠΎΡ‚Π½ΠΎΡΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ объСмной. ИзмСнСниС рСзистивных свойств ΠΏΠΎΠ΄ΠΎΠ±Π½Ρ‹Ρ… гСтСроструктур обусловлСно Ρ„ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΈΠ»ΠΈ Ρ€Π°Π·Ρ€ΡƒΡˆΠ΅Π½ΠΈΠ΅ΠΌ проводящСго ΠΊΠ°Π½Π°Π»Π° Ρ‡Π΅Ρ€Π΅Π· ΡƒΠΊΠ°Π·Π°Π½Π½Ρ‹ΠΉ слой. ЧислСнноС ΠΌΠΎΠ΄Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ, Ρ‡Ρ‚ΠΎ ΠΏΡ€ΠΈ этом Π½Π° биполярныС рСзистивныС ΠΏΠ΅Ρ€Π΅ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΡ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ΅ влияниС ΠΎΠΊΠ°Π·Ρ‹Π²Π°Π΅Ρ‚ топология распрСдСлСния элСктричСского поля. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Π° модСль «критичСского поля» для описания ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎ Π½Π°Π±Π»ΡŽΠ΄Π°Π΅ΠΌΡ‹Ρ… мСмристивных эффСктов Π² исслСдуСмых гСтСроструктурах. Π’ этой ΠΌΠΎΠ΄Π΅Π»ΠΈ прСдполагаСтся, Ρ‡Ρ‚ΠΎ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡƒΠ΄Π΅Π»ΡŒΠ½ΠΎΠΉ проводимости происходит Π² Ρ‚Π΅Ρ… частях повСрхностного слоя, Π³Π΄Π΅ Π½Π°ΠΏΡ€ΡΠΆΠ΅Π½Π½ΠΎΡΡ‚ΡŒ элСктричСского поля ΠΏΡ€Π΅Π²Ρ‹ΡˆΠ°Π΅Ρ‚ Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ критичСскоС Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅. МодСль «критичСского поля» основана Π½Π° числСнном расчСтС распрСдСлСния элСктричСского ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΠ°Π»Π° ΠΏΠΎ Ρ€Π°ΡΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΈΡŽ ΡƒΠ΄Π΅Π»ΡŒΠ½ΠΎΠΉ проводимости Π² структурС. ΠšΡ€ΠΎΠΌΠ΅ Ρ‚ΠΎΠ³ΠΎ, рассмотрСна модСль ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡŽΡ‰Π°Ρ ΠΏΡ€ΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ влияниС элСктродиффузии ΠΈΠΎΠ½ΠΎΠ² кислорода Π½Π° рСзистивныС ΠΏΠ΅Ρ€Π΅ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΡ Π² гСтСроструктурах Π½Π° основС Bi2Sr2CaCu2O8+x. ΠŸΡ€ΠΈ числСнной Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ использовалось сочСтаниС ΠΈΠ½Ρ‚Π΅Π³Ρ€ΠΎ-разностной аппроксимации Π΄ΠΈΡ„Ρ„Π΅Ρ€Π΅Π½Ρ†ΠΈΠ°Π»ΡŒΠ½Ρ‹Ρ… ΡƒΡ€Π°Π²Π½Π΅Π½ΠΈΠΉ, многосСточного ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Π° для Π»ΠΎΠΊΠ°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ нСоднородностСй физичСских характСристик, ΠΈΡ‚Π΅Ρ€Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΠ΅Ρ‚ΠΎΠ΄Π° Π΄Π΅ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ†ΠΈΠΈ ΠΈ составных Π°Π΄Π°ΠΏΡ‚ΠΈΠ²Π½Ρ‹Ρ… сСток. Π­Ρ‚ΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ с Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎΠΉ Ρ‚ΠΎΡ‡Π½ΠΎΡΡ‚ΡŒΡŽ ΠΎΡ‚ΡΠ»Π΅ΠΆΠΈΠ²Π°Ρ‚ΡŒ исслСдуСмыС процСссы. ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½ΠΎ сравнСниС Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² модСлирования с ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹ΠΌΠΈ Π΄Π°Π½Π½Ρ‹ΠΌΠΈ

    SYNTHESIS AND DEPOSITION OF AG NANOPARTICLES ONTO POLYPROPTLENE FILM BY ATMOSPHERIC PRESSURE GLOW DISCHARGE TREATMENT

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    This report presents a one-step method of silver nanoparticles synthesis and deposition of it onto polypropylene surface by use of an atmospheric pressure glow discharge. Obtained data of UV-vis spectroscopy and Zetasizer indicate that Ag nanoparticles are polydispersed. The polypropylene film surface is modified during gas discharge treatment219-21

    The role of government support for the mortgage market in current economic conditions

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    Π’ Π΄Π°Π½Π½ΠΎΠΉ ΡΡ‚Π°Ρ‚ΡŒΠ΅ раскрыта Ρ€ΠΎΠ»ΡŒ господдСрТки для ΠΈΠΏΠΎΡ‚Π΅Ρ‡Π½ΠΎΠ³ΠΎ Ρ€Ρ‹Π½ΠΊΠ°.In this article the role of state support for the mortgage market, the factors influencing this process

    Level density and thermal properties in rare earth nuclei

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    A convergent method to extract the nuclear level density and the gamma-ray strength function from primary gamma-ray spectra has been established. Thermodynamical quantities have been obtained within the microcanonical and canonical ensemble theory. Structures in the caloric curve and in the heat capacity curve are interpreted as fingerprints of breaking of Cooper pairs and quenching of pairing correlations. The strength function can be described using models and common parameterizations for the E1, M1 and pygmy resonance strength. However, a significant decrease of the pygmy resonance strength at finite temperatures has been observed.Comment: 15 pages including 8 figures. Proceedings article for the conference Nuclear Structure and Related Topics, Dubna, Russia, June 6-10, 200

    Social responsibility and human capital of enterprises in the system of regional social policy

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    ΠœΠΎΠ½ΠΎΠ³Ρ€Π°Ρ„ΠΈΡ посвящСна исслСдованию ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌ ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ отвСтствСнности ΠΈ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½Π½ΠΎΠ³ΠΎ чСловСчСского ΠΊΠ°ΠΏΠΈΡ‚Π°Π»Π° прСдприятий Π² Ρ€Π΅Π³ΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΉ ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΠ΅ с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ Π½Π°ΠΏΡ€Π°Π²Π»Π΅Π½ΠΈΠΉ развития чСловСчСского ΠΊΠ°ΠΏΠΈΡ‚Π°Π»Π° Π² Ρ€Π°ΠΌΠΊΠ°Ρ… ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ отвСтствСнности прСдприятий Ρ€Π΅Π³ΠΈΠΎΠ½Π°. Π’ ΠΌΠΎΠ½ΠΎΠ³Ρ€Π°Ρ„ΠΈΠΈ ΠΏΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ ΠΊΠ°ΠΊ тСорСтичСскиС, Ρ‚Π°ΠΊ ΠΈ мСтодичСскиС основы провСдСния Π°Π½Π°Π»ΠΈΠ·Π° ΠΈ ΠΎΡ†Π΅Π½ΠΊΠΈ ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ отвСтствСнности прСдприятий Ρ€Π΅Π³ΠΈΠΎΠ½Π°, Π° Ρ‚Π°ΠΊΠΆΠ΅ Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΡ‹Π΅ ΡΠΎΠ΄Π΅Ρ€ΠΆΠ°Ρ‚Π΅Π»ΡŒΠ½Ρ‹Π΅ ΠΈ матСматичСскиС обоснования. РассмотрСны мСтодичСскиС ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Ρ‹ ΠΊ ΠΎΡ†Π΅Π½ΠΊΠ΅ эффСктивности ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ отвСтствСнности прСдприятий Π½Π΅Ρ„Ρ‚Π΅Π³Π°Π·ΠΎΠ΄ΠΎΠ±Ρ‹Π²Π°ΡŽΡ‰Π΅ΠΉ отрасли с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ Π½ΠΎΡ€ΠΌΠ°Ρ‚ΠΈΠ²Π½ΠΎ-ΠΏΡ€Π°Π²ΠΎΠ²Ρ‹Ρ… Π΄ΠΎΠΊΡƒΠΌΠ΅Π½Ρ‚ΠΎΠ². ΠœΠΎΠ½ΠΎΠ³Ρ€Π°Ρ„ΠΈΡ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ использована студСнтами, аспирантами ΠΈ прСподаватСлями экономичСских Π²ΡƒΠ·ΠΎΠ² (Ρ„Π°ΠΊΡƒΠ»ΡŒΡ‚Π΅Ρ‚ΠΎΠ²), Π½Π°ΡƒΡ‡Π½Ρ‹ΠΌΠΈ ΠΈ практичСскими Ρ€Π°Π±ΠΎΡ‚Π½ΠΈΠΊΠ°ΠΌΠΈ, спСциалистами Π² области ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ отвСтствСнности прСдприятий
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