A. A. Teplykh

TL;DR: It has been demonstrated both theoretically and experimentally that the value of the real part of the electrical impedance on the frequency of parallel resonance uniquely associates with the octane number of gasoline contacting the free side of the resonator.

TL;DR: In this article, the characteristics of the three lowest order plate waves propagating in piezoelectric plates whose thickness h is much less than the acoustic wavelength lambda are theoretically analyzed, and it is found that these waves can provide much higher values of electromechanical coupling coefficient K(2) and lower values of temperature coefficient of delay (TCD) than is possible with surface acoustic waves.

TL;DR: In this article, the interaction of different types of acoustic waves of zero and higher orders propagating in lithium niobate piezoelectric plates is theoretically investigated, and a quantitative coefficient characterizing the degree of wave hybridization with allowance for both mechanical and electric coupling is introduced.

TL;DR: In this article, the effect of a perfectly elastic nonviscous nonconducting liquid on the characteristics of a zero-order antisymmetric Lamb wave in a 128YX LiNbO3 plate, whose thickness is small compared to the wavelength, is studied both theoretically and experimentally.

TL;DR: It has been found that the depth and frequency of these peaks depend on the parameters of liquid contacting with the upper plate, and the possibility of the use of the slot mode in the pointed structure for the identification of liquids with the different values of the conductivity, viscosity, and permittivity was shown.