The article states ways to scale digital filters (DF) with lateral feedbacks (LFB). Models of four types of DF with LFBs with their nonrecursive implementation are considered. Filters are scaled using hi impulse response and scaling using the amplitude-frequency characteristic of the cir- cuit. The obtained results allow, on the one hand, to prevent overfilling of the grade graticule of the DF with LFBs, and on the other hand, to significantly increase its noise immunity and effi- ciency.
The article presents a mathematical model with dual phase lag based on the heat conduction equation of hyperbolic type, taking into account effect of thermal relaxation and thermal damp- ing. The numerical solution of the hyperbolic heat conduction problem is obtained taking into account the final speed of heat spread and temperature damping. The implementation of the grid method using a three-layer implicit difference scheme in solving the problem of non- stationary heat conductivity for a transition thermal processes were treated. An algorithm for calculating the temperature field using a dual phase lag equation is described. The results of calculations of temperature fields in biological tissues according to the hyperbolic thermal con- ductivity equation for the calculation area within the dual phase zone are presented.
A quadrature method for measuring the phase difference of harmonic signals using frequency conversion is considered. It is proposed to introduce into the algorithmic structure of the method the common mode procedure of signal. The efficiency of the developed modified quadrature method is estimated.
The study focuses on the determination of the strategies of exploitation of systems and telecommunication of the changes of manufacturing technology equipment. Existing research is not linked to the aging of products depending on the technology of manufacture of electronic equipment. The proposed model of correlation maintenance strategy of telecommunication with the improvement of technology. On the basis of the Methodology of the state Committee for standardization identified the main strategy of operation; for mathematics-for-economic models, strat- egies mapped by the criterion of minimum cost/maximum revenue. Conducted an evolutionary analysis to improve the technology since the 1960's. Conducted field studies of the drift rate (ag- ing) parameters determining the efficiency of devices and telecommunication systems for different elemental components: on the basis of lighting technology, semiconductors, integrated circuits, worked in the 1970s-1990s. The change in the rate of aging was determined. The compari- son of operation strategies at the current level of technology development is made. It is proved that there will be no further change in operating strategies. Further improvement of manufacturing technology will be accompanied by quantitative changes.
Theoretical and experemental analysis of MPI_Bcast algortihms are performed. The optimal tree degrees and segment sizes for pipelined versions of algorithms are obtained. Algorithms were investigated according to their implementation in the Open МРI. Theoretical results are consistent with experiments on a computer cluster with a Gigabit Ethernet communication network.
A set-theoretic model for solving the problem of system analysis and synthesis in a complex non- linear system, taking into account the input parameters, the requirements for the output character- istics, the variability of the architecture of the system, external destructive effects on it is consid- ered. The results of testing approbated on digital automatic telephone exchange are presented.
The main operation modes of a multifunctional airborne radar system of UAVs short and medium range (MARS UAV) are considered. The developed tactics of application of MARS opera- tion modes for detecting, identifying and tracking various objects as well as monitoring are pre- sented. These tactics allow UAV operator to use effectively the technical capabilities of the MARS.
This paper considers the existing mechanism of formation and adjustment requirements for robotic complexes in the Ministry of Defense of Russia. We propose the ways to improve it: the transition from the "collection of requirements" system to the “management of requirements” system based on an evolutionary and technological approach.
In the paper MIMO systems with various technologies for optimizing system performance in a non-selective Rayleigh channel have been considered. The focus is on a relatively new antenna technologies recommended for fifth-generation networks: Spatial Modulation and Transmit An- tenna Selection technologies. Formulas of BER and channel capacity have been given as well as graphs based on them for characteristics comparison.
