Научные журналы НИЯУ МИФИ
Постоянный URI для этого раздела
В коллекцию включены журналы, в которых НИЯУ МИФИ является учредителем и соучредителем.
Обзор
Просмотр Научные журналы НИЯУ МИФИ по Автор "Arbuzov, E. V."
Теперь показываю 1 - 3 из 3
Количество результатов на страницу
Sort Options
- ПубликацияОткрытый доступAdaptation of the Gauss-Newton Optimization Algorithm in Hilbert Diagnostics Using the Bunsen Flame as an Example(НИЯУ МИФИ, 2024) Arbuzov, E. V.; Dubnishchev, Yu. N.; Zolotukhina, O. S.The possibility of using the Gauss-Newton optimization algorithm in Hilbert diagnostics of reacting media (flames) is considered in the paper using the example of data on the temperature and main compounds of a laminar methane-air Bunsen flame. The method of reconstructing phase optical density fields is used to solve the inverse problem of Hilbert optics (it was previously proposed and tested on numerical models): the hilbertogram is calculated in the considered flame axisymmetric section, from which the initial values of the phase function and the medium refractive index are reconstructed. The applications scope expansion of the obtained results in the experimental data processing will be the work development.
- ПубликацияОткрытый доступGauss-Newton Method in the Problem of Optimizing the Axisymmetric Phase Function Calculation Based on the Hilbert Diagnostic Data(НИЯУ МИФИ, 2023) Arbuzov, E. V.; Arbuzov, V. A.; Dubnishchev, Yu. N.; Zolotukhina, O. S.A method for reconstructing phase disturbances of a probing light field using the iterative Gauss-Newton algorithm is discussed as part of the Hilbert diagnostics development of gaseous, condensed and reacting media. In this case, the need to determine second derivatives is eliminated, which simplifies the calculations. The method consists of selecting a phase profile, which is specified by a Bezier curve, and hilbertogram calculating. The coincidence of the reference and reconstructed hilbertograms serves as a criterion for the results reliability. The Jacobian matrix for the nonlinear integral operator of Hilbert visualization is obtained. The algorithm is analyzed using a test function. The method development is associated with the algorithm application to the processing of experimental results, including the reconstruction of complex structures in which the phase function is described by several Bezier polynomials.
- ПубликацияОткрытый доступPossibility of Using the Gershberg-Papoulis Method in the Problem of Phase Structure Reconstructing from Low-angle Hilbertograms(НИЯУ МИФИ, 2024) Arbuzov, E. V.; Arbuzov, A. V. ; Dubnishchev, Yu. N.; Zolotukhina, O. S.; Lapikov, M. M.; Lukashov, V. V.The possibility of processing small-view hilbertograms by the Gershberg-Papulis method to restore the refractive index of phase objects is discussed. The method consists in iterative transitions from estimating a function in the Fourier plane to estimating it in a coordinate space with an adjustment using a priori information. The spectrum of the function is determined on the entire frequency plane as an iterative process result Numerical simulation of the refractive index reconstruction for various test functions was performed using the Gershberg-Papulis method using Radon data known for four angles. Experimental studies on the Hilbert diagnostics example of reacting media (flames) in a high-speed shooting mode (up to 2000 frames per second) were performed using a four-angle tomographic complex implemented on the basis of an upgraded IAB-463M shadow device.