Vol 12, No 3 (2014)

The paper is dedicated to the optimization procedures of the modular-positional conversion, which are based on the binary exponent division method. The optimization provides minimization of summary time spent and applying of accessible memory for tables. It is achieved by using of minimally redundant modular coding, and number systems with large bit radix, as well as the table-summatory technology of calculation.

The paper proposes a new approach of forming spectrally efficient signal-code structures (SCS) based on used new orthogonal signal basis. Applying the basis of eigenvectors with the parameters whom agreed with communication channel allows you to get SCS spectral efficiency whom by 20% exceeds the currently used CCM OFDM.

In work the generalized invariant of linear communication channels in the form of the relation of volumes of the m-dimensional parallelepipeds formed in alarm space by the relevant groups of transmitted signals kept by channels is synthesized. The algorithm of transmission of messages using this invariant is developed. The assessment of information security of the generalized invariant method of transmission of messages is given.

The article presents an analysis heavy-tailed distributions and obtained a decision on the average waiting time for queuing system H2/M/1. Together with the author’s program to re-store the time -tion characteristics of the distribution of intervals between bursts of incoming traffic, this method allows to calculate the characteristics of the incoming traffic queuing theory methods .

The formation of the diffraction pattern during the passage of light beams, and Bessel Gauss-Laguerre through a plate of crystal quartz. Experimental studies of the differences shown in the formation of images and detect changes in the structure of the symmetric beams, depending on the orientation of the crystal plate. The proposed experiment allows us to see the benefits of the structural beams to the Gauss-Laguerre Bessel beams in the diffraction pattern as it passes through the crystal. The results are important for studying the mechanisms of diffraction of light beams in natural crystals and the development of new methods for determining optical parameters of crystal quartz.

The algorithm of management on the basis of indistinct logic is worked out developed and the system of automatic stabilization of temperature of process of a fermentation in the bio-reactor of continuous action is investigated. Results of modeling of the fuzzy controller and assessment of its efficiency in comparison with the traditional proportional and integrated and differential regulator (PID-regulator) are given. For development of the regulator of stabilization of temperature of exothermic process of a fermentation the hybrid technology of adaptive neuro and indistinct system of the conclusions - ANFIS is used. The developed indistinct regulator provides requirements to stabilization of temperature of fermentative system at restriction on operating influence. Results of researches showed that introduction of the offered system will allow to increase the accuracy of maintenance of the set temperature concerning the PID-regulator for 2,1% and to cut a peak expense of a coolant on 43%. The robastnost to indignations on temperature of cooling water and compensation of a thermal emission of process at restriction on a consumption of cooling water is thus provided and at admissible temperature mismatches in system at a peak thermal emission.

The main ways of ensuring coverage are discussed when deploying WLAN at objects of a complex structure and topography. Grounded approaches to choosing the best combination of options to ensure coverage.

The paper presents the simulation results of the characteristics of module-retransmitter (MR) of signal, containing confidential information for commercial purposes. The MR is a source of intentional imitating jamming in the active protection system of confidential information from its leaking through random antennas.

This article represents the research of the characteristics of the market cryptocurrency, the background and possible causes of this financial instrument, especially market.