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91.
A. A. Zhirkov V. I. Pogonin G. I. Romanovskaya A. S. Korotkov E. A. Zevakin B. K. Zuev 《Journal of Analytical Chemistry》2011,66(12):1217-1222
A portable fluorescence analyzer has been developed for determining 0.03–3000 ng/L of uranium(VI) in various types of waters;
the relative standard deviation is 10%. The principle of time selection of the luminescence of analyte and the impurities
has been used. In contrast to the previous apparatus with a bulky nitrogen laser or a low-power light diode, this apparatus
involves a powerful pulse xenon lamp. 相似文献
92.
93.
K. V. Frolov D. L. Zagorskii I. S. Lyubutin V. V. Korotkov S. A. Bedin S. N. Sulyanov V. V. Artemov B. V. Mchedlishvili 《JETP Letters》2014,99(10):570-576
Arrays of iron nanowires prepared by the method of galvanic filling of polymer track-etched membrane pores (matrix synthesis) under different electrolysis modes and electrolyte temperatures have been studied. The conditions of the synthesis have been analyzed. The optimal composition and electrolyte temperature have been found. The phase composition and magnetic properties of nanowires have been studied using the methods of electron microscopy, X-ray diffraction, elemental energy-dispersive microanalysis, and Mössbauer spectroscopy. The average nanowire diameter is 100–200 nm. The length varies from 6 to 10 μm. The surface density is ~108 cm?2 at the average distance to each other of about 1 μm. It has been established that the basis of nanowires is formed by the metal iron nanocomposite that manifests the magnetic properties of bulk α-Fe. It has been found that the preferred orientation of the magnetization inside the iron nanowires arises for an array prepared at a potential of ?750 mV. 相似文献
94.
V. B. Korotkov 《Siberian Mathematical Journal》2014,55(1):100-104
We construct an example of a compact operator of the third kind in L p (p ≠ 2) not similar to any integral operator of the first or second kind. This example shows that not every linear equation of the third kind in L p (p ≠ 2) can be reduced by an invertible continuous linear change to an equivalent integral equation of the first or second kind. The example also proves the impossibility of a characterization of integral and Carleman integral operators in L p (p ≠ 2) in terms of the spectrum and its components. 相似文献
95.
L. N. Korotkov T. N. Korotkova R. R. Levitskii S. I. Sorokov A. S. Vdovych 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(10):1331-1334
The time dependences of polarization of K0.88(NH4)0.12H2PO4 mixed crystal have been studied within the temperature range of 74–100 K. Two mechanisms of polarization relaxation were
found. The first mechanism is caused by domain walls lateral motion and their interaction with point lattice defects. The
second one supposedly is due to polar regions infiltration through the regions of frustrated paraelectric phase. 相似文献
96.
R. R. Levitskii I. R. Zachek L. N. Korotkov A. S. Vdovych S. I. Sorokov 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(10):1388-1393
Along with their electromechanical coupling coefficients, the longitudinal dielectric, piezoelectric and elastic characteristics
in ferroelectric KH2PO4 and antiferroelectric NH4H2PO4 crystals are calculated using a modified proton ordering model that considers piezoelectric coupling and the four-particle
cluster approximation. The possibility of detecting piezoactivity in solid solutions of K1 − x
(NH4)xH2PO4 is substantiated. 相似文献
97.
P. K. Korotkov V. A. Sozaev R. B. Tchakachov Z. A. Uianaeva 《Bulletin of the Russian Academy of Sciences: Physics》2009,73(7):982-984
The influence of the environment permittivity on the electron work function of an aluminum nanowire has been estimated within the electron-density formalism for the first time. 相似文献
98.
Conclusion By increasing the curing temperature and reducing the winding rate, it is possible to obtain compressive radial stresses in a cylindrical product during the entire curing stage — which should prevent loss of integrity during the curing operation. When the duration of the curing process is limited, the magnitude of the compressive stresses will depend in an extreme manner on curing temperature. Meanwhile, in the general case, ensuring minimal residual stresses will not ensure the absence of tensile radial stresses during curing.Translated from Mekhanika Kompozitnykh Materialov, No. 5, pp. 873–877, September–October, 1988. 相似文献
99.
100.
V.A. Korotkov W.-D. Nowak 《The European Physical Journal C - Particles and Fields》2002,23(3):455-461
Prospects for future measurements of deeply virtual Compton scattering are studied in leading order using different simple
models for the parameterizations of generalized parton distributions (GPDs). Measurements of the lepton charge and lepton
beam helicity asymmetry will yield important input for theoretical models towards the future extraction of GPDs. The kinematics
of the HERMES experiment, complemented with a recoil detector, was adopted to arrive at realistic projected statistical uncertainties.
Received: 13 August 2001 / Revised version: 23 October 2001 / Published online: 15 March 2002 相似文献