Search Results - "Niedźwiecki, Maciej"

On Optimal Tracking of Rapidly Varying Telecommunication Channels by Niedzwiecki, Maciej, Gancza, Artur

“…When parameters of mobile telecommunication channels change rapidly, classical adaptive filters, such as exponentially weighted least squares algorithms or…”
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Karhunen-Loeve-based approach to tracking of rapidly fading wireless communication channels by Niedźwiecki, Maciej, Gańcza, Artur

“…•Application of local basis function approach to identification of rapidly fading channels.•Basis generation using Karhunen-Loeve decomposition…”
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Locally Adaptive Cooperative Kalman Smoothing and Its Application to Identification of Nonstationary Stochastic Systems by Niedzwiecki, Maciej

“…One of the central problems of the stochastic approximation theory is the proper adjustment of the smoothing algorithm to the unknown, and possibly…”
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Overview on Aneuploidy in Childhood B-Cell Acute Lymphoblastic Leukemia by Panuciak, Kinga, Nowicka, Emilia, Mastalerczyk, Angelika, Zawitkowska, Joanna, Niedźwiecki, Maciej, Lejman, Monika

“…Recent years have brought significant progress in the treatment of B-cell acute lymphoblastic leukemia (ALL). This was influenced by both the improved schemes…”
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On adaptive covariance and spectrum estimation of locally stationary multivariate processes by Niedźwiecki, Maciej, Ciołek, Marcin, Kajikawa, Yoshinobu

“…When estimating the correlation/spectral structure of a locally stationary process, one has to make two important decisions. First, one should choose the…”
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Adaptive identification of sparse underwater acoustic channels with a mix of static and time-varying parameters by Niedźwiecki, Maciej, Gańcza, Artur, Shen, Lu, Zakharov, Yuriy

“…•Adaptive identification of sparse underwater acoustuc channels with a mix of static and time-varying parameters.•Adaptive time-invariance test for deciding on…”
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Hydrophilic interaction chromatography combined with dispersive liquid–liquid microextraction as a preconcentration tool for the simultaneous determination of the panel of underivatized neurotransmitters in human urine samples by Konieczna, Lucyna, Roszkowska, Anna, Niedźwiecki, Maciej, Bączek, Tomasz

“…•Simultaneous determination of selected monoamine neurotransmitters along with their precursors and metabolites with different polarities using elaborated…”
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Finite-window RLS algorithms by Shen, Lu, Zakharov, Yuriy, Niedźwiecki, Maciej, Gańcza, Artur

“…Two recursive least-squares (RLS) adaptive filtering algorithms are most often used in practice, the exponential and sliding (rectangular) window RLS…”
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Bioanalysis of underivatized amino acids in non-invasive exhaled breath condensate samples using liquid chromatography coupled with tandem mass spectrometry by Konieczna, Lucyna, Pyszka, Magdalena, Okońska, Magdalena, Niedźwiecki, Maciej, Bączek, Tomasz

“…•Pre-concentration step is necessary for amino acid analysis in EBC samples.•Vacuum evaporation is the best pre-concentration method for EBC samples.•The…”
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New Semicausal and Noncausal Techniques for Detection of Impulsive Disturbances in Multivariate Signals With Audio Applications by Niedzwiecki, Maciej, Ciolek, Marcin

“…This paper deals with the problem of localization of impulsive disturbances in nonstationary multivariate signals. Both unidirectional and bidirectional…”
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Generalized Adaptive Notch Smoothing Revisited by Niedzwiecki, Maciej

“…The problem of identification of quasi-periodically varying dynamic systems is considered. This problem can be solved using generalized adaptive notch…”
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Dynamic mass measurement in checkweighers using a discrete time-variant low-pass filter by Pietrzak, Przemysław, Meller, Michał, Niedźwiecki, Maciej

“…Conveyor belt type checkweighers are complex mechanical systems consisting of a weighing sensor (strain gauge load cell, electrodynamically compensated load…”
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COVID-19 in pediatric palliative care patients: Multicenter, retrospective cohort study by Korzeniewska-Eksterowicz, Aleksandra, Brzezinska, Olga, Dryja, Urszula, Matczak, Dominka, Sopilnyak, Andriy, Szuszkiewicz, Eugenia, Przysło, Łukasz, Szmyd, Krzystof, Jabłońska, Katarzyna, Krych, Piotr, Wojtków-Zielińska, Agnieszka, Wąsińska, Edyta, Niedźwiecki, Maciej

“…Background: Studies have shown the risk factors for COVID-19 severity in children, including comorbidities, but information on the infection course in children…”
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Easy recipes for cooperative smoothing by NIEDZWIECKI, Maciej

“…In this paper we suggest how several competing signal smoothers, differing in design parameters, or even in design principles, can be combined together to…”
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Identification of nonstationary multivariate autoregressive processes – Comparison of competitive and collaborative strategies for joint selection of estimation bandwidth and model order by Niedźwiecki, Maciej, Ciołek, Marcin

“…The problem of identification of multivariate autoregressive processes (systems or signals) with unknown and possibly time-varying model order and time-varying…”
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New Algorithms for Adaptive Notch Smoothing by Niedźwiecki, Maciej, Meller, Michał

“…The problem of extraction/elimination of a nonstationary complex sinusoidal signal buried in noise is considered. This problem is usually solved using adaptive…”
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Elimination of Impulsive Disturbances From Stereo Audio Recordings Using Vector Autoregressive Modeling and Variable-order Kalman Filtering by Niedzwiecki, Maciej, Ciolek, Marcin, Cisowski, Krzysztof

“…This paper presents a new approach to elimination of impulsive disturbances from stereo audio recordings. The proposed solution is based on vector…”
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The Landscape of Secondary Genetic Rearrangements in Pediatric Patients with B-Cell Acute Lymphoblastic Leukemia with t(12;21) by Kaczmarska, Agnieszka, Derebas, Justyna, Pinkosz, Michalina, Niedźwiecki, Maciej, Lejman, Monika

“…The most frequent chromosomal rearrangement in childhood B-cell acute lymphoblastic leukemia (B-ALL) is translocation t(12;21)(p13;q22). It results in the…”
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The Impact of Past COVID-19 Infection on Selected Lymphocyte Subsets in Pediatric Patients by Budziło, Oskar, Irga-Jaworska, Ninela, Myszyńska, Marcelina, Malanowska, Magdalena, Niedźwiecki, Maciej

“…The impact of past COVID-19 infection on the immune system remains unidentified. So far, several papers have revealed the dependence between the count of…”
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Automated Detection of Sleep Apnea and Hypopnea Events Based on Robust Airflow Envelope Tracking in the Presence of Breathing Artifacts by Ciolek, Marcin, Niedzwiecki, Maciej, Sieklicki, Stefan, Drozdowski, Jacek, Siebert, Janusz

“…The paper presents a new approach to detection of apnea/hypopnea events, in the presence of artifacts and breathing irregularities, from a single-channel…”
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