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21.
Thermal conductivity and thermal diffusivity coefficients of liquid indium have been determined in the range of temperatures
from 470 to 1275 K by the laser flash method. Errors of heat transfer coefficients are ±(3.5–5) %. Approximating equations
and tables of reference data have been developed for temperature dependence of properties. Measurement results have been compared
with the data available in the literature. Temperature dependence of Lorentz number has been calculated up to 1000 K. 相似文献
22.
A toral algebraic set A is an algebraic set in ℂ
n
whose intersection with T
n
is sufficiently large to determine the holomorphic functions on A. We develop the theory of these sets, and give a number
of applications to function theory in several variables and operator theoretic model theory. In particular, we show that the
uniqueness set for an extremal Pick problem on the bidisk is a toral algebraic set, that rational inner functions have zero
sets whose irreducible components are not toral, and that the model theory for a commuting pair of contractions with finite
defect lives naturally on a toral algebraic set. 相似文献
23.
R. A. Khairulin R. N. Abdullaev S. V. Stankus 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2017,91(10):1946-1950
The density and thermal expansion of liquid rubidium and rubidium–bismuth alloy containing 25.0 at % Bi were measured by the gamma-ray attenuation technique at temperatures from liquidus to 1000 K. The results of this study were compared with the data obtained by other authors. The molar volume of the Rb75Bi25 melt strongly deviates from the additivity rule for ideal solutions. 相似文献
24.
Speed of sound in the gaseous freon R-236ea with the purity of 99.68 mol. % has been measured by the method of ultrasonic interferometer in the range from 263 to 423 K and at pressures from 17 kPA to 4.2 MPa. Errors of temperature, pressure, and speed of sound measurement were estimated to be within +/- 20 mK, ± 1.5 kPa, and ±(0.1+0.2) % respectively. Temperature dependence of ideal-gas heat capacity of R-236ea has been calculated on the basis of the obtained data. 相似文献
25.
Thermal conductivity and thermal diffusivity of tantalum in the temperature range from 293 to 1800 K
Thermal diffusivity of polycrystalline tantalum at the temperature range from 293 to 1800 K has been measured by the laser
flash method with the error of 2–4 %. Thermal conductivity has been calculated with the use of reference data on density and
heat capacity. Approximating equations and tables of reference data for the temperature dependence of heat transfer coefficients
have been obtained; comparison with the published data has been carried out.
The work was financially supported by the Russian Foundation for Basic Research (Grant No. 07-08-00071). 相似文献
26.
Brown CN Awes TC Beddo ME Brooks ML Bush JD Carey TA Chang TH Cooper WE Gagliardi CA Garvey GT Geesaman DF Hawker EA He XC Isenhower LD Kaplan DM Kaufman SB Kirk PN Koetke DD Kyle G Lee DM Lee WM Leitch MJ Makins N McGaughey PL Moss JM Mueller BA Nord PM Papavassiliou V Park BK Peng JC Petitt G Reimer PE Sadler ME Sondheim WE Stankus PW Thompson TN Towell RS Tribble RE Vasiliev MA Webb JC Willis JL Wise DK Young GR;FNAL E/NuSea Collaboration 《Physical review letters》2001,86(12):2529-2532
We present a measurement of the polarization observed for bottomonium states produced in p-Cu collisions at square root of s = 38.8 GeV. The angular distribution of the decay dimuons of the Upsilon(1S) state shows no polarization at small values of the fractional longitudinal momentum x(F) and transverse momentum p(T) but significant positive transverse production polarization for either p(T)>1.8 GeV/c or for x(F)>0.35. The Upsilon(2S+3S) (unresolved) states show a large transverse production polarization at all values of x(F) and p(T) measured. These observations challenge NRQCD calculations of the polarization expected in the hadronic production of bottomonium states. 相似文献
27.
The density and thermal expansion coefficients of liquid sodium and sodium-lead alloys (2.50, 5.00, 7.50, 9.99, and 21.03 at. % Pb) were investigated using gamma-ray attenuation technique in the temperature range from the liquidus line up to 950 K. Accuracy of density measurement is estimated to be ± 0.22–0.4 %. Temperature and concentration dependences of thermal properties of liquid system Na-Pb have been built. 相似文献
28.
Interdiffusion in lithium-lead melts containing 10.0, 15.0, 18.1, 20.0, 25.1, 30.2, 38.2, 40.1, 43.1, 46.7, 50.2, 60.2, and 70.0 at. % Pb was investigated using gamma-ray attenuation technique in the temperature range from 720 to 1030 K. It has been found that the concentration dependence of the interdiffusion coefficient has a maximum in the vicinity of 20 at. % Pb. This phenomenon is shown to relate to a tendency of formation of short-range order in liquid alloys of lithium?lead. 相似文献
29.
R. N. Abdullaev A. Sh. Agazhanov R. A. Khairulin S. V. Stankus 《Thermophysics and Aeromechanics》2016,23(2):247-253
The density and the thermal expansion of liquid lithium–lead alloys with Pb content of 83.0 and 84.3 at. % was measured using gamma-ray attenuation technique over the temperature range from liquidus to 1000 K. The density change during solid–liquid phase transition was directly measured for the first time for Li15.7Pb84.3 alloy. A comparison of the obtained results with literature data has been carried out. 相似文献
30.
Yu. M. Kozlovskii S. V. Stankus O. S. Yatsuk A. Sh. Agazhanov S. G. Komarov I. S. Anufriyev 《Thermophysics and Aeromechanics》2014,21(1):99-103
The article presents the results of investigation of thermal expansion of 16Kh12V2FTaR steel in the temperature range 20–1000 °C. Measurements were carried out by dilatometric method with the error (1.5–2)×10?7 K?1. The temperature dependences of thermal coefficient of linear expansion of steel have been obtained in ferrite-martensite and ferrite-perlite states, and reference tables have been calculated. Influence of samples cooling rate on martensite phase formation is shown. 相似文献