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Общее количество найденных документов : 46
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 1-20    21-40   41-46 
1.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Self-organization of a critical state and 1/f(alpha)-fluctuations at film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Physics Letters A. - 1999. - V. 263, N 4-6. - С. 430-433
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NONEQUILIBRIUM PHASE TRANSITIONS -- 1/f-NOISE
Аннотация: 1/f and 1/f(2)-fluctuations have been first revealed by experiment at film boiling on a vertically oriented platinum heater. Fluctuations of 1/f(alpha)-spectrum have been observed over both a wide range of governing parameters and a band of five decimal orders. The experimental results testify to a possible self-organized critical behaviors of a dynamical system at nonequilibrium phase transitions

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2.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Fluctuations with a 1/f(alpha) spectrum in film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Jetp Letters. - 1999. - V. 69, N 8. - С. 636-639
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NONEQUILIBRIUM PHASE TRANSITIONS -- 1/f-NOISE
Аннотация: 1/f and 1/f(2) noise were observed experimentally in film boiling of water on vertically oriented platinum heater. Fluctuations with a 1/f(alpha) spectrum were observed in a wide range of controlling parameters and seen over five orders of magnitude in frequency. It was noted that the process investigated is similar to the phenomenon of self-organized criticality

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3.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Self-organization of a critical state and 1/f(alpha)-fluctuations at film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Physics Letters A. - 1999. - V. 263, N 4-6. - С. 430-433
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NONEQUILIBRIUM PHASE TRANSITIONS -- 1/f-NOISE
Аннотация: 1/f and 1/f(2)-fluctuations have been first revealed by experiment at film boiling on a vertically oriented platinum heater. Fluctuations of 1/f(alpha)-spectrum have been observed over both a wide range of governing parameters and a band of five decimal orders. The experimental results testify to a possible self-organized critical behaviors of a dynamical system at nonequilibrium phase transitions

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4.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Fluctuations with a 1/f(alpha) spectrum in film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Jetp Letters. - 1999. - V. 69, N 8. - С. 636-639
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NONEQUILIBRIUM PHASE TRANSITIONS -- 1/f-NOISE
Аннотация: 1/f and 1/f(2) noise were observed experimentally in film boiling of water on vertically oriented platinum heater. Fluctuations with a 1/f(alpha) spectrum were observed in a wide range of controlling parameters and seen over five orders of magnitude in frequency. It was noted that the process investigated is similar to the phenomenon of self-organized criticality

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5.
Инвентарный номер: нет.
   
   О-42

   
    1/f-Noisa under Conditions of Interaction between Phase Transitions [] / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, A. V. Vinogradov // High Temperature. - 2001. - Vol. 39, N 2. - С. 296-301: il. - Bibliogr.: p. 321 (13 n.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- PHASE TRANSITIONS

\\\\Expert2\\NBO\\High Temperature\\2001, v.39, p.316.pdf
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6.
Инвентарный номер: нет.
   
   S 45

   
    Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, V. P. Koverda, A. V. Vinogradov // Physica A. - 2001. - Vol.293, № 1-2. - С. 1-12
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SELF-ORGANIZED CRITICALITY -- 1/f FLUCTUATIONS -- POWER SPECTRA
Аннотация: Oscillatory combustion regimes were experimentally investigated under the conditions of ignitable liquid boiling-up before the reaction front. Fluctuations with a power spectral density inversely proportional to frequency (1/f-noise) were observed and the power-law character of distribution functions was found. The phenomena are connected with the intersection and interaction of nonequilibrium phase transitions. A mathematical model describing the initiation of 1/f fluctuations at the interaction of a subcritical phase transition and supercritical one in a space-distributed system was suggested

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7.
Инвентарный номер: нет.
   
   S 45

   
    Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, V. P. Koverda, A. V. Vinogradov // Physica A. - 2001. - Vol.293, № 1-2. - С. 1-12
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SELF-ORGANIZED CRITICALITY -- 1/f FLUCTUATIONS -- POWER SPECTRA
Аннотация: Oscillatory combustion regimes were experimentally investigated under the conditions of ignitable liquid boiling-up before the reaction front. Fluctuations with a power spectral density inversely proportional to frequency (1/f-noise) were observed and the power-law character of distribution functions was found. The phenomena are connected with the intersection and interaction of nonequilibrium phase transitions. A mathematical model describing the initiation of 1/f fluctuations at the interaction of a subcritical phase transition and supercritical one in a space-distributed system was suggested

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8.
Инвентарный номер: нет.
   
   О-42

   
    1/f-Noisa under Conditions of Interaction between Phase Transitions [] / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, A. V. Vinogradov // High Temperature. - 2001. - Vol. 39, N 2. - С. 296-301: il. - Bibliogr.: p. 321 (13 n.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- PHASE TRANSITIONS

\\\\Expert2\\NBO\\High Temperature\\2001, v.39, p.316.pdf
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9.
Инвентарный номер: нет.
   
   R 30

   
    Reaktive Recoil and Pressure Pulsations with 1/f Power Spectrum under Conditions of Explosion Boiling of Jets of Superheated Liquid [] / A. V. Reshetnikov, N. A. Mazheiko, V. P. Skripov, V. N. Skokov, V. P. Koverda // High Temperature. - 2002. - V. 40, N 5. - 701-705: graph. - Bibliogr.: p. 760 (14 n.) . - ISSN 0040-3644
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
THERMOPHYSICS -- REACTIVE RECOIL -- PRESSURE PULSATIONS -- 1/f POWER SPECTRUM -- SUPERHEATED LIQUIDS

\\\\Expert2\\NBO\\High Temperature\\2002, v.40, p.701.pdf
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10.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    1/f - Noise at non-equilibrium phase transitions / V. P. Koverda, V. N. Skokov, A. V. Reshetnikov // Nucleation Theory and Applications. - Dubna : JINR, 2002. - С. 259-272. - Bibliogr. : p.271-272 (17 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLICKER NOISE -- FLUCTUATION -- FILMS

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11.
Инвентарный номер: нет.
   
   R 30

   
    Reaktive Recoil and Pressure Pulsations with 1/f Power Spectrum under Conditions of Explosion Boiling of Jets of Superheated Liquid [] / A. V. Reshetnikov, N. A. Mazheiko, V. P. Skripov, V. N. Skokov, V. P. Koverda // High Temperature. - 2002. - V. 40, N 5. - 701-705: graph. - Bibliogr.: p. 760 (14 n.) . - ISSN 0040-3644
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
THERMOPHYSICS -- REACTIVE RECOIL -- PRESSURE PULSATIONS -- 1/f POWER SPECTRUM -- SUPERHEATED LIQUIDS

\\\\Expert2\\NBO\\High Temperature\\2002, v.40, p.701.pdf
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12.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    1/f - Noise at non-equilibrium phase transitions / V. P. Koverda, V. N. Skokov, A. V. Reshetnikov // Nucleation Theory and Applications. - Dubna : JINR, 2002. - С. 259-272. - Bibliogr. : p.271-272 (17 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLICKER NOISE -- FLUCTUATION -- FILMS

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13.
Инвентарный номер: нет.
   

   
    1/f noise and self-organized criticality in crisis regimes of heat and mass transfer / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, V. P. Skripov, N. A. Mazheiko, A. V. Vinogradov // International Journal of Heat and Mass Transfer. - 2003. - Vol. 46, № 10. - С. 1879-1883
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- FLUCTUATIONS -- FLICKER NOISE
Аннотация: Thermal fluctuations under the transition from nucleate to film boiling of water on a wire heater and fluctuations of jet form during an outflow of superheated liquid from a pressure vessel were experimentally investigated. It has been found that power spectrum of the fluctuations has got a low frequency component corresponding to a 1/f law (flicker noise).??The effect given is connected with the occurrence of nonequilibrium phase transitions in the systems: a crisis of heat transfer under the transition from nucleate to film boiling and a crisis of a flow in boiling-up of superheated liquid jet??

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14.
Инвентарный номер: нет.
   

   
    1/f noise and self-organized criticality in crisis regimes of heat and mass transfer / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, V. P. Skripov, N. A. Mazheiko, A. V. Vinogradov // International Journal of Heat and Mass Transfer. - 2003. - Vol. 46, № 10. - С. 1879-1883
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- FLUCTUATIONS -- FLICKER NOISE
Аннотация: Thermal fluctuations under the transition from nucleate to film boiling of water on a wire heater and fluctuations of jet form during an outflow of superheated liquid from a pressure vessel were experimentally investigated. It has been found that power spectrum of the fluctuations has got a low frequency component corresponding to a 1/f law (flicker noise).??The effect given is connected with the occurrence of nonequilibrium phase transitions in the systems: a crisis of heat transfer under the transition from nucleate to film boiling and a crisis of a flow in boiling-up of superheated liquid jet??

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15.
Инвентарный номер: нет.
   
   F 68

   
    Flicker-Noise in Superheated Liquid Jets / A. V. Reshetnikov, V. P. Skripov, V. P. Koverda, N. A. Mazheiko, A. V. Vinogradov // Heat Transfer Research. - 2004. - Vol. 35, № 1-2. - С. 59-66
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BOILING-UP LIQUID -- CRITICAL MODES -- VAPOR FORMATION
Аннотация: Change of the shape of a boiling-up liquid jet flowing from a high-pressure vessel at high superheatings was investigated experimentally. Mechanisms of volumetric heterogeneous and homogeneous nucleation are distinguished and their connection with critical modes of outflow is determined. Results of the experimental study of recoil of boiling-up liquid jets in a thermodynamically strong nonequilibrium mode of outflow are presented. The dynamics of vapor content fluctuations is studied by a method of photometry of passed laser radiation. Fluctuations of pressure in a superheated liquid jet at various mechanisms of vapor formation are measured by a method of strain metering. It was found that in intense volumetric boiling-up of a superheated liquid jet the power spectrum of fluctuations has a low-frequency component (flicker-noise) which diverges according to the 1/f law. This effect is related to nonequilibrium phase transitions in the system

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16.
Инвентарный номер: нет.
   
   F 68

   
    Flicker-Noise in Superheated Liquid Jets / A. V. Reshetnikov, V. P. Skripov, V. P. Koverda, N. A. Mazheiko, A. V. Vinogradov // Heat Transfer Research. - 2004. - Vol. 35, № 1-2. - С. 59-66
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BOILING-UP LIQUID -- CRITICAL MODES -- VAPOR FORMATION
Аннотация: Change of the shape of a boiling-up liquid jet flowing from a high-pressure vessel at high superheatings was investigated experimentally. Mechanisms of volumetric heterogeneous and homogeneous nucleation are distinguished and their connection with critical modes of outflow is determined. Results of the experimental study of recoil of boiling-up liquid jets in a thermodynamically strong nonequilibrium mode of outflow are presented. The dynamics of vapor content fluctuations is studied by a method of photometry of passed laser radiation. Fluctuations of pressure in a superheated liquid jet at various mechanisms of vapor formation are measured by a method of strain metering. It was found that in intense volumetric boiling-up of a superheated liquid jet the power spectrum of fluctuations has a low-frequency component (flicker-noise) which diverges according to the 1/f law. This effect is related to nonequilibrium phase transitions in the system

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17.
Инвентарный номер: нет.
   

   
    1/f Fluctuations under acoustic cavitation of liquids / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, A. V. Vinogradov // Physica A. - 2006. - Vol.364. - С. 63-69
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SELF-ORGANIZED CRITICALITY -- ACOUSTIC CAVITATION -- NONEQUILIBRIUM CONDITIONS
Аннотация: A regime of a generation of fluctuations with 1/f power spectra under cavitation of liquids in an ultrasonic field has been found experimentally. The acoustic cavitation is accompanied by the formation of various spatial structures and scale-invariant distribution functions of fluctuations. It has been shown that local fluctuations can have non-Gaussian distribution. A two-dimensional distributed parameter system of stochastic equations describing interacting nonequilibrium phase transitions has been investigated numerically. It has been shown that the system in a wide range of changing initial conditions and the intensity of external noise is characterized by the 1/f behavior of power spectra and scale-invariant distribution functions of fluctuations. The results of numerical simulation agree qualitatively with the experimental data

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18.
Инвентарный номер: нет.
   

   
    1/f Fluctuations under acoustic cavitation of liquids / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, A. V. Vinogradov // Physica A. - 2006. - Vol.364. - С. 63-69
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SELF-ORGANIZED CRITICALITY -- ACOUSTIC CAVITATION -- NONEQUILIBRIUM CONDITIONS
Аннотация: A regime of a generation of fluctuations with 1/f power spectra under cavitation of liquids in an ultrasonic field has been found experimentally. The acoustic cavitation is accompanied by the formation of various spatial structures and scale-invariant distribution functions of fluctuations. It has been shown that local fluctuations can have non-Gaussian distribution. A two-dimensional distributed parameter system of stochastic equations describing interacting nonequilibrium phase transitions has been investigated numerically. It has been shown that the system in a wide range of changing initial conditions and the intensity of external noise is characterized by the 1/f behavior of power spectra and scale-invariant distribution functions of fluctuations. The results of numerical simulation agree qualitatively with the experimental data

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19.
Инвентарный номер: нет.
   
   A 71

   
    Arc current fluctuation power spectra in the system of a solid metal electrode and carbonate melt [Текст] / A. V. Reshetnikov, V. N. Sannikov, V. N. Skokov, V. P. Koverda // Journal of Applied Mechanics and Technical Physics. - 2007. - Vol. 48, № 1. - С. 7-10
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SOLID METALS
Аннотация: Arc current fluctuations between a solid metal electrode and a liquid melt of alkaline carbonates at atmospheric pressure are measured. Arc current fluctuation power spectra are determined from the measurement data. It is shown that the fluctuation power is inversely proportional to the frequency (1/f-fluctuations). The fluctuations have a normal Gaussian distribution. The observed 1/f fluctuations exhibit scale invariance.

\\\\Expert2\\NBO\\Journal of Applied Mechanics and Technical Physics\\2007, v. 48, N. 1, p.7.pdf
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20.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Statistics of low-frequency pulsations in critical regimes of heat mass exchange with phase transitions / V. P. Koverda, V. N. Skokov, A. V. Reshetnikov // Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 130 -138
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLUCTUATION -- IRREGULAR HIGH-ENERGY -- 1 / F СПЕКТРЫ
Аннотация: Experimental investigation of fluctuation dynamics in critical and transitional modes of heat mass exchange shows existence of irregular high-energy pulsations with power spectrum inversely proportional to the frequency—so called 1/f spectrum. Such regimes are characterized by the fact that an essential part of the pulsations energy is connected with very slow processes and mean that large high-energy bursts are possible in the system. Another characteristic feature of such regimes is scale invariance of the fluctuations distribution function. According to the theory, the 1/f fluctuations can emerge in physical systems due to simultaneous phase transitions in presence of sufficiently intensive white noise. This paper is devoted to detailed investigation of relaxation processes at steadying of stationary stochastic process in non-equilibrium phase transitions in system of two nonlinear stochastic differential equation. Such an information reveals statistical patterns of particular large-scale low-frequency bursts. Discontinuous “forgetting” of the initial conditions takes place. It is shown by numerical methods that distributions of duration and maximal values of the low-frequency extreme bursts have the power-like form. Experimental investigation results of statistical characteristics of fluctuation processes at ultrasonic cavitation and flash boiling of overheated water jets are presented. Results of the experiments carried out fit conclusions of the theoretical model for interacting heterogeneous phase transitions

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