Continuous improvements in the hardware, software and algorithms of unmanned vehicles (UVs) are nearing their mass deployment in all physical environments, including within unmanned groups, and with traditional means of transport controlled by the operators (drivers). Notwithstanding the measures taken to improve security and resilience, UVs as complicated cyberphysical systems have a number of vulnerabilities and failure points. This paper comprises the review of known vulnerabilities and failure points (including those in group control scenarios), and the development of the proposals to improve the resilience and security of UVs, and addresses the identified issues.

The current paper demonstrates the effective capabilities of deep neural networks in solving the problem of identification of constellations from a photo of the sky in conditions of a priori uncertainty, incomplete observability and stochastic disturbances. The quality of solution 0,927 by metric F1 is obtained. In order to achieve the result, the original ResNet-like architecture of the convolution neural network was synthesized; statistical analysis of the dataset was carried out, the function of losses and strategy of neural network training were developed, and an accurate criterion of constellation observability in the image was formed. The observation of noise influence on the quality and stability of solutions was carried out.

In this paper the two exotic particular cases are studied for the first time: 1) wave transmission from vacuum to a biaxial anisotropic medium for a sliding plane wave propagation in vacuum; 2) wave transmission from a biaxial anisotropic medium to vacuum when the tangential component of a wavevector is equal to wavenumber in vacuum. The analytical models for these cases are obtained. В данной статье исследован случай скользящего прохождения волны над поверхностью раздела изотропной среды и анизотропной структуры. Описано такое экзотическое явление, как эффект «просачивания волны» в анизотропный фотонный кристалл. Получены выражения углов отклонения луча, коэффициентов отражения и прохождения для структуры ячейки, а также проведены численные расчеты для рассматриваемого случая в среде MAPLE17. Показано, что возможно подобрать параметры материалов таким образом, чтобы в структуре распространялась только необыкновенная волна, а обыкновенная затухала в приграничной области.

We consider the conflict between the stability margins and the degree of stability (the latter determines speed of response) as engineering performance indices of closed loop system for a plant with stable zeros. The H ∞ synthesis and the pole placement control design procedures are used to show through examples that assignment of "overly stable" closed loop poles leads to dramatic decrease of stability margins. It is shown that stability margins do not indicate the system robust properties in the case of the plant with the relative order being no more than one when the controller cancels all plant zeros. The continuous time and discrete time cases are studied.

One of the main advantages of multiple antenna systems is the support of multi-user connections, simultaneously transmitting parallel data streams. This can significantly increase the overall system throughput. However, the spectral efficiency can be additionally increased through the usage of various dynamic strategies which take into account the current state of the system. Here we propose a method to evaluate the effectiveness of such strategies with the help of appropriate mathematical models. Purpose: Development of mathematical models for a multi-user MIMO system which would allow you to evaluate the average delay of a file transfer. Results: Mathematical models of the MIMO system are presented in the form of discrete/continuous time queuing systems for three user service strategies. We provide formulas for estimating the average file transfer delay in a closed form, which simplify numerical analysis as compared to the well-known methods using mathematical models in continuous time. This method allows you to find the most effective strategy with less computational complexity. Another advantage of the constructed models is the opportunity of further research on the effect of file length distributions on the file transfer delay. The conclusions we made about the effectiveness of each strategy are consistent with our earlier work, which is confirmed by a numerical example. Practical relevance: The developed mathematical models for a multi-user MIMO system can be used to set the operating parameters of a real wireless MIMO system.