Showing papers by "Russian State Agricultural University published in 2008"
TL;DR: In this paper, the potential of small-size vector hydroacoustic receive systems measuring acoustic power flux (APF) is discussed in application to the detection of weak signals in the presence of ambient sea noise.
Abstract: Based on an analysis of experimental data and model simulations, the potential of small-size vector hydroacoustic receive systems measuring acoustic power flux (APF) are discussed in application to the detection of weak signals in the presence of ambient sea noise. It is shown that APF receivers are capable of measuring signal levels no less than 10–20 dB lower (depending on the signal-interference situation in the water area) than those measured by PRs. In order to extend the class of hydroacoustic systems whose potential can be correctly compared, it is proposed to modify the definition of interference immunity by introducing two separate qualifying notions: noise and interference.
9 citations
TL;DR: In this article, the possibility of obtaining nickel-phosphorus coatings doped with copper (0.5-2 wt %) by chemical deposition from weakly acidic solutions containing nickel and copper salts and sodium hypophosphite, as well as malonic, succinic, and aminoacetic acids as complex-forming and buffering components, and a lead salt as the stabilizer at pH 6.3-7.0 and a temperature of 87-97°C.
Abstract: We have studied the possibility of obtaining nickel-phosphorus coatings doped with copper (0.5–2 wt %) by chemical deposition from weakly acidic solutions containing nickel and copper salts and sodium hypophosphite, as well as malonic, succinic, and aminoacetic acids as complex-forming and buffering components, and a lead salt as the stabilizer at pH 6.3–7.0 and a temperature of 87–97°C. The solution composition has been optimized using the method of mathematical experiment planning so as to provide the deposition at a maximum rate.
3 citations
TL;DR: In this article, the authors considered the problem of planar inertial motion of three bodies connected in the form of a triangle by an elastic imponderable filament, as well as a particular case of the motion of a closed chain of n bodies.
Abstract: A problem of planar inertial motion of three bodies connected in the form of a triangle by an elastic imponderable filament is considered, as well as a particular case of the problem of motion of a closed chain of n bodies. This configuration can be a basis for extended planar constructions in deep space.
1 citations