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Документ Research and analysisindicatorsfiber-optic communication lines using spectral technologies(Національний технічний університет "Харківський політехнічний інститут", 2022) Ibrаhimov, Bayram; Hashimov, Elshan; Talibov, Aziz; Hasanov, ArifThe fiber-optic communication linesand fiber-optic transmission systems using fiber-optic cable, receiving and transmitting optical modules based on WDM and DWDM (Wavelength Division Multiplexing & Dense WDM) technologies are studied. A method for calculating thetransmission characteristicsfiber-optic communication lines is proposed and relationships are obtained that establish an analytical relationship between the length regeneration section and the transmission rate. This paper discusses the study and analysis indicatorsfiber-optic communication lines using spectral WDM and DWDM technologies.Документ The problem of redistribution of radio frequency used in the organization divisions(Національний технічний університет "Харківський політехнічний інститут", 2021) Pashayev, Adalat Bakhtiyar; Sabziev, Elhan Nariman oglu; Hasanov, Arif Hasan oğluThe problem of radio frequency distribution is considered in the article, taking into account the regulations and geographical location of the operating units. The problem of assigning radio frequencies from among those assigned for corporate use is studied. Using conformal mapping, it was substantiated that any territory can be divided into zones, each of which will have a border with only three other zones. In this case, in each zone, you can assign frequencies in the amount of one quarter of the total number of available frequencies that do not overlap with frequencies assigned to adjacent zones. A mathematical model of the problem of radio frequency redistribution has been built, taking into account the regulations and the geographical location of the units. The implementation of algorithm allows taking into account the history of frequency distribution by zones, which allows you to completely update the used radio frequencies for a new period of operation. A software module has been compiled that generates frequencies at random from those available for assigning corporate use for each zone. The software module allows fast and frequent reallocation of frequencies by zones, thereby ensuring the safety, reliability and stability of communication between organizational units.