Multicriteria Collision Risk Ranking of Aircraft by Data from an Onboard Radar Station

Journal of Communications Technology and Electronics - An option of multicriteria collision risk ranking of aircraft by data from an onboard radar station (OBRS) is proposed. This method can be...     

Estimation of the Range and Its Derivatives in an Active Two-Position Radar System

The algorithm characterizing the optimal estimation of the range and its derivatives is examined as applied to a two-position radar system. It is demonstrated that the given algorithm enables us to allow for inhomogeneous compositions of positions and measurement data coming nonsimultaneously from them and stably generate the estimates of the range and its derivatives. Its simulation confirming a high accuracy is implemented.     

Multipurpose Tracking in Multiposition Radar Systems

Journal of Communications Technology and Electronics - An algorithm for multipurpose tracking in multiposition radar systems is considered, and its effectiveness is evaluated.     

Thermal and adhesion properties of bioinert layers on a titanium nickelide surface

Protection of Metals and Physical Chemistry of Surfaces - The results of determination of thermal and adhesive stability of bioinert layers formed by plasma electrolytic oxidation on the surface of...     

Empirical Study of Extreme Overfitting Points of Neural Networks

Journal of Communications Technology and Electronics - In this paper we propose a method of obtaining points of extreme overfitting—parameters of modern neural networks, at which they...     

Work during screw rolling

A new technique is proposed to determine the specific volume work of deformation during screw rolling. Methods for determining the work of deformation in various sections of the deformation zone in a piercing mill are considered. The dependence of the work of deformation on the reduction in the deformation zone is obtained. A new approach is proposed to calculate the fracture sensitivity and the working of the structure of continuously cast round billets. The effect of the reduction ratio on the work of deformation in similar piercing mills located at OAO Pervoural’sk Nonvotrubnyi Plant and the Yuzhnotrubnyi Plant is estimated.     

Glass formation in the fluoride system ZrF4-BiF3-BaF2

The glass formation in the system ZrF₄-BiF₃-BaF₂ has been investigated in the composition range (75–30)ZrF₄-(0–60)BiF₃-(0–40)BaF₂, mol %. The synthesis and thermal and optical properties of bismuth-barium-fluorozirconate glass were described. As was shown by the DSC (differential scanning calorimetry) method, at the BiF3 content of 20–35 mol %, glass with the highest stability against crystallization was formed. Further stabilization of the vitreous state can be attained using additives of alkali metals and trifluorides.     

Work of deformation in screw rolling

A method is proposed for determining the unit work of deformation in the broaching of blanks in two-roller screw-rolling mills. A new approach is outlined for assessing the fracture risk and the structure of continuous-cast circular billet. Methods for determining the work of deformation in different sections of the deformation zone are considered. The distribution of the work of deformation due to reduction over the whole deformation zone is determined. The influence of extension on the work of deformation is assessed for similar rolling mills at OAO Pervoural’skii Novotrubnyi Zavod and OAO Yuzhnotrubnyi Zavod.