Поправки к статье Солодухина С. Н. «Струны и антисимметричные тензорные поля» (Вестн. Моск. ун-та. Сер. 3, Физика. Астрономия. 1988. 29, № 3. С. 78)
Поправки к статье Солодухина С. Н. «Струны и антисимметричные тензорные поля» (Вестн. Моск. ун-та. Сер. 3, Физика. Астрономия. 1988. 29, № 3. С. 78)
С.Н. Солодухин
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Show AbstractOscillatory states of some nonlinear systems with distributed delay
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An analysis is given of the nonlinear oscillations of the components of manipulator devices, taking into account their viscoelastic prop erties. An averaging procedure is used to calculate the small oscillations of manipulator components that accompany the programmed motion of the mechanism.
Show AbstractThe effect of target density on the equilibrium charge composition of beams of fast helium ions
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А calculation is reported of the mean charge $\bar{i}$ and the charge fractions $F_i$. of an equilibrium beam of helium ions in high and low density media as functions of the charge $Z_t$ of the target nuclei in the range $1\le Z_t \le 24$ and ion velocities in the range $V_0\le V\le 3V_0$. It is shown that the functions $\bar{i}(Z_t)$ and $F_i(Z_t)$ may bе very different in low and high density targets.
Show AbstractApproximate analytic solution of the problem of the helium atom
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The method of hyperspherical harmonic s is used to obtain an approximate analytic solution of the quantum- mechanical problem of the helium atom. The calculated ground- state energy differs from the exact value bу only 3,8%. The express ion for the wave function is reproduced.
Show AbstractGeneralized effect of dynamic damping of noise in resonant measuring circuits
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. А. V. Gusev and V. N. Rudenko
The minimum noise in measuring circuits consisting of а test oscillator and а resonance electromechanical transducer is discussed. А formula is given for the amplitude of the threhold signal for large values of the electromechanical coupling coefficient.
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It is shown that а regular external disturbance outside synchronization regions leads to the smoothing of the spectral density of chaotic oscillations in auto-stochastic systems. Different scenarios of transition to chaos in а nonautonomous generator of chaotic oscillations that incorporates а tunnel diode are discussed.
Show AbstractSnergy approach to the desciption of transverse-mode generation in injection lasers
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An analysis of the characteristic equation for the active waveguide of the injection laser with arbitrarily specified transverse geometry is used to derive and investigate the equation for the energy balance during transverse - mode generation.
Show AbstractCharacterization of defects observed in the scanning electron microscope in single -crystal $BaY_2F_8$ used in the vacuum ultraviolet
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Scanning electron microscopy was used to investigate the structure of single-crystal $BaY_2F_8$. The experirnental results indicate that the structure factor contributes to the optical spectra of the single crystals.
Show AbstractNumerical simulation of the plasma mirror produced on the surface of а semiconductor bу а picosecond pulse of adiation
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Show AbstractDetermination of the probability of absorption of light in free -free transitions
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The evaluation of the matrix element sof the electric dipole transition between states in the continuous spectrum is discussed. Recurrence relations are obtained for the contribution to the matrix elements of the integral evaluated over the region outside the atom in terms of the values of the wave functions and their derivatives on the boundary.
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