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1.
A circuit design is proposed and the possibilities for incorporation of an input double-notch low-frequency ripple filter are considered. Recommendations regarding the use of mathematical models for the calculation of transient processes in a DC electric-traction network are given. An analysis of the simulation of processes in a low-frequency filter shows that the emission of interference by the electric rolling stock should be estimated using the wavelet analysis since this approach best suits the studies of nonstationary signals. 相似文献
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A. S. Nikiforov V. I. Vlasov V. I. Davydov P. G. Dobrygin A. I. Kachurin O. A. Krivyakov D. A. Kukiev A. S. Polyakov V. F. Savelev S. N. Filippov 《Atomic Energy》1989,67(1):501-506
Translated from Atomnaya Énergiya, Vol. 67, No. 1, pp. 11–15, July, 1989. 相似文献
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Conclusion The study of the optical properties of vibrationally excited gas is part of the general problem of studying the physicochemical properties of a nonequilibrium gas. A nonequilibrium gas is a new state of a substance with extraordinary properties. Since stationary nonequilibrium is maintained by external pumping, then by changing the external conditions the properties of a nonequilibrium gas can be altered within quite broad limits. The presence of an excess reserve of internal (vibrational) energy transforms the medium into a nonlinear one. The characteristics of the medium start to depend on factors disturbing the nonequilibrium. On the other hand the disturbing factors themselves, say, the optical or gasdynamic disturbance, the charged particle fluxes, etc., will depend in turn on the nonequilibrium that they produce. Such self-consistency makes solution of the problem difficult but then it results in new phenomena such as self-focusing.Notation NAv
Avogadro number
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density
- n
refractive index
- N
density of the number of molecules
-
their mean polarizability
- Qj
set of normal coordinates
- W0
energy of a molecule without a field
- gv
j
statistical weight of the vibrational statev
j
with normal coordinate Qj
- mj
reduced mass
- j
frequency of the j-th mode
- xe
anharmony constant of the molecule
-
probing radiation wavelength
-
shift of the interference fringe
- d
length of the interferometer arm
- r0
initial light beam radius
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 56, No. 5, pp. 824–838, May, 1989. 相似文献
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Toughening epoxy resins can be achieved by blending a low percentage of Liquid Crystalline Polymer with the thermoset. The processing technique consists of the spinning of blends of a thermoplastic (Ardel) with the LCP (PET/PHB60). The bundled filaments are subsequently dissolved in the uncured epoxy resin (Epon 825). After curing, the LCP phase separates from the matrix in the form of microfibers with a very high aspect ratio, which act as crack stoppers and improve fracture toughness of the material. 相似文献
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