16 citations · 33 across the 10 of their papers we have counts for
10 papers
Improving Classification Neural Networks by using Absolute activation function (MNIST/LeNET-5 example)
Oleg I. Berngardt
The paper discusses the use of the Absolute activation function in classification neural networks. An examples are shown of using this activation function in simple and more comple…
Wrapped Classifier with Dummy Teacher for training physics-based classifier at unlabeled radar data
Oleg I. Berngardt, Oleg A. Kusonsky, Alexey I. Poddelsky +1
In the paper a method for automatic classification of signals received by EKB and MAGW ISTP SB RAS coherent scatter radars (8-20MHz operating frequency) during 2021 is described. T…
Noise level forecasts at 8-20MHz and their use for morphological studies of ionospheric absorption variations at EKB ISTP SB RAS radar
Oleg I. Berngardt
In this paper, a method is described for using 8-20MHz noise absorption effect for realtime detecting radiowave absorption periods. The method is based on two empirical autoregress…
Analysis of the fine structure of HF ground backscatter and ionospheric scatter signals based on EKB radar data
Ivan A. Lavygin, Valentin P. Lebedev, Konstantin V. Grkovich +1
The analysis was carried out of the scattered signal in the cases of ground backscatter and ionospheric scatter. The analysis is based on the data of the decameter coherent EKB IST…
The first results of monitoring observations of a meteor echo at ISTP SB RAS EKB radar: algorithms, validation, statistics
Oleg I. Berngardt, Roman R. Fedorov
The paper presents the implementation of algorithms for automatic search for signals scattered at meteor tracks based on the ISTP SB RAS EKB radar data. The algorithm is divided in…
Optimal signals for spectral measurements at EKB SuperDARN radar: Theory and Experiment
Oleg I. Berngardt, A. L. Voronov, K. V. Grkovich
The requirements for an optimal sequence for SuperDARN radar are stated. Obtained quasioptimal signals up to 26-pulse sequence are based on optimal and nearly optimal Golomb rulers…
Seismo-ionospheric effects associated with 'Chelyabinsk' meteorite during the first 25 minutes after its fall
Oleg I. Berngardt
This paper presents the properties of ionospheric irregularities elongated with Earth magnetic field during the first 25 minutes after the fall of the meteorite 'Chelyabinsk' exper…
Improving the spatial resolution by effective subtraction technique at Irkutsk incoherent scatter radar: the theory and experiment
Oleg I. Berngardt, Dmitry S. Kushnarev
We describe a sounding technique that allows us to improve spatial resolution of Irkutsk Incoherent Scatter Radar without loosing spectral resolution. The technique is based on tra…
Towards the dispersion relation for ionacoustic instabilities in weakly inhomogeneous ionospheric plasma at altitudes 80-200km and its low-frequency solution
Oleg I. Berngardt, Alexander P. Potekhin
In the paper within the approximation of the two-fluid magnetohydrodynamics and geometrooptical approximation the dispersion relation was found for ionacoustic instabilities of the…
Least Sqaure Method for Sum of the Functions Satysfying the Differential Equations with Polynomial Coefficients
Oleg I. Berngardt, Alexander L. Voronov
We propose a linear algorithm for determining two function parameters by their linear combination. These functions must satisfy the first order differential equations with polynomi…