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Information × Registration Number 0225U002245, (0124U000461) , R & D reports Title Methods of detection and identification of sources and scatters of electromagnetic waves in inhomogenious media popup.stage_title Розробка теоретичних моделей поширення електромагнітних хвиль в неоднорідних середовищах Head Dubinin Mykola M., Доктор філософії Registration Date 26-02-2025 Organization V.N. Karazin Kharkiv National University popup.description1 The goal of the project is the development and implementation of effective methods of detection and identification of sources and scatterers of electromagnetic signals in heterogeneous environments. Simulate and experimentally confirm the processes of propagation of electromagnetic waves in inhomogenious media containing various exciters, scatterers, disturbers and sources of electromagnetic waves, conduct research for various fixed frequencies and use the Fourier series decomposition approach for broadband signals. Take into account absorption and refraction at the boundaries of the separation of the medium and determine the location of the targets by the received signal in the receiver located outside the medium. Use machine learning algorithms to solve the inverse radiophysical problem of determining sources (or scattering objects) regardless of external factors. popup.description2  The first stage of the project provides for comprehensive research into the formation and propagation of electromagnetic waves in heterogeneous environments. The features of mathematical modeling of electromagnetic wave scattering for objects with uneven surfaces were considered. In the process of work, three-dimensional models of objects were built, numerical modeling of their radar characteristics was performed taking into account the influence of the underlying surface, and the effective scattering area was estimated. The modeling results showed the possibility of optimizing structures to reduce the radar visibility of objects. The use of modern Artificial Intelligence algorithms when processing data on critical precipitation levels showed reliable results. A modified FDTD method was developed to calculate the parameters of electromagnetic fields that can affect heterogeneous environments. The sources of the fields are generated laser radiation, powerful electronic warfare means, radar system emitters, electronic components of mobile autonomous devices, as well as disasters caused by natural phenomena or human activity. The first stage of research showed that broadband disturbances exist in a fairly wide frequency range ─ from 0.001 Hz to 3 THz. In particular, the explosion and eruption of a powerful volcano generates oscillations in the frequency range 0.001 ─ 1 Hz. A solar eclipse causes significant variations in all geoshells and the magnetic field, which affects the physical parameters of signal propagation. The mechanisms of absorption, scattering and changes in the phase characteristics of waves when they pass through inhomogeneous zones are considered in detail. The results obtained form the basis for further fundamental research in the field of communications, forecasting natural disasters and developing new diagnostic tools for inhomogeneous environments. The results of the research will contribute to the further development of control and monitoring sy Product Description popup.authors Akhmedov Rolan D. Plakhtii Vadym A. Seniuta Vladyslav S. Khrychov Vladyslav S. Shevelev Mykyta B. popup.nrat_date 2025-02-26 Close