Wyniki wyszukiwania dla: SECTORAL PERFORMANCE

• Novel approach to modeling spectral-domain optical coherence tomography with Monte Carlo method

  Publikacja

  • M. Kraszewski
  • M. Trojanowski
  • M. Strąkowski
  • J. Pluciński
  • B. Kosmowski

  - Rok 2014

  Numerical modeling Optical Coherence Tomography (OCT) systems is needed for optical setup optimization, development of new signal processing methods and assessment of impact of different physical phenomena inside the sample on OCT signal. The Monte Carlo method has been often used for modeling Optical Coherence Tomography, as it is a well established tool for simulating light propagation in scattering media. However, in this method...

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• Certain numerical issues of wave propagation modelling in rods by the Spectral Finite Element Method

  Publikacja

  • A. Żak
  • M. Krawczuk

  - FINITE ELEMENTS IN ANALYSIS AND DESIGN - Rok 2011

  W pracy omówiony zagadnienia związane z modelowaniem propagacji fal sprężystych metodą Spektralnych Elementów Skończonych. Przedstawiono wpływ postaci macierzy mas na błędy rozwiązania. Omówiono zakres stosowalności modeli.

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• Formulation of spectral truss element for guided waves damage detection in spatial steel trusses

  Publikacja

  • J. Chróścielewski
  • M. Rucka
  • K. Wilde
  • W. Witkowski

  - Archives of Civil Engineering - Rok 2009

  W pracy przedstawiono sformułowanie wielowęzłowego elementu spektralnego oraz odpowiedniego schematu całkowania ukierunkowanego na problem propagacji fal w kratownicach przestrzennych o dowolnej geometrii. Zaproponowane podejście nie ogranicza liczby węzłów w elemencie kratowym. Porównawcze rozwiązania numeryczne przeprowadzono dla konstrukcji idealnej (w stanie nieuszkodzonym) oraz dlakonstrukcji z miejscową nieregularnością w...

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• Spectral analysis of nonstationary low-frequency magnetic-field emissions from ship's power

  Publikacja

  • F. Converters
  • B. Palczynska
  • B. Pałczyńska

  - Rok 2009

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• Numerical Estimate of the Spectral Resonance Structure Frequency Scale of Natural ULF Magnetic Field

  Publikacja

  • A. Odzimek
  • A. Odzimek

  - STUDIA GEOPHYSICA ET GEODAETICA - Rok 2004

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• Spectral profiling of radicals in polymer degradation based on electron spin resonance imaging (ESRI)

  Publikacja

  • S. Schlick
  • K. Kruczala
  • M. Motyakin
  • J. Gerlock

  - Polymer Degradation and Stability - Rok 2001

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• Electronic and nuclear properties from the analysis of the isotope shifts in the spectral lines of lead [online]

  Publikacja

  • T. Wąsowicz

  - EUROPEAN PHYSICAL JOURNAL D - Rok 2009

  W pracy dokonano analizy 24 linii widmowych atomu i jonu ołowiu, przy użyciu metody diagramów Kinga. Połączenie danych pomiarowych otrzymanych z badań fizyki jądrowej z danymi spektroskopii optycznej pozwoliło na analizę przesunięć izotopowych linii widmowych niezależnie od modelu teoretycznego. W wyniku czego, rozdzielono efekt masy od efektu objętościowego i otrzymano szereg danych spektroskopowych stanowiących bogatą bazę doświadczalną...

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• Modelling of wave propagation in composite plates using the time domain spectral element method

  Publikacja

  • P. Kudela
  • A. Żak
  • M. Krawczuk
  • W. Ostachowicz

  - JOURNAL OF SOUND AND VIBRATION - Rok 2007

  W pracy przedstawiono wyniki obliczeń propagacji fali sprężystej w płycie kompozytowej modelowanej z wykorzystaniem czasowego sformułowania metody elementów spektralnych

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• Machine learning goes global: Cross-sectional return predictability in international stock markets

  Publikacja

  • N. Cakici
  • C. Fieberg
  • D. Metko
  • A. Zaremba

  - JOURNAL OF ECONOMIC DYNAMICS & CONTROL - Rok 2023

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• Synthetic Jet Actuators with the Same Cross-Sectional Area Orifices-Flow and Acoustic Aspects

  Publikacja

  • E. Smyk
  • J. Wilk
  • M. Markowicz

  - Applied Sciences-Basel - Rok 2021

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• Application of the semantic network to manage processes in the area of legal regulation of education at the Doctoral School

  Publikacja

  • A. Greńczuk
  • I. Chomiak-Orsa
  • E. Piwoni-Krzeszowska

  - Procedia Computer Science - Rok 2023

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• Influence of Al3+co-doping on the spectral properties of europium doped Ca9Y(PO4)7

  Publikacja

  • K. Szczodrowski
  • N. Górecka
  • M. Grinberg

  - RSC Advances - Rok 2020

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• Analysis of graphene multi-strip planar guiding structures with the use of spectral domain approach

  Publikacja

  • W. Marynowski
  • P. Kowalczyk
  • R. Lech
  • A. Kusiek
  • J. Mazur

  - Rok 2017

  Spectral domain approach is modified and used to analyze some simple structures containing graphene strips. The modification is simple and concerns the Green’s function only. Moreover, the method is combined with the recently published root finding algorithms, which significantly improve the efficiency of the analysis. The results obtained for a simple guiding structure is verified and the field displacement effect is confirmed.

• The Spectral Compositions of Light Changes Physiological Response of Chinese Cabbage to Elevated Ozone Concentration

  Publikacja

  • A. Skoczowski
  • J. Oliwa
  • I. Stawoska
  • M. Rys
  • M. Kocurek
  • I. Czyczyło-Mysza

  - International Journal of Molecular Sciences - Rok 2022

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• Pediatric trauma and emergency surgery: an international cross-sectional survey among WSES members

  Publikacja

  • M. Reichert
  • M. Sartelli
  • I. Askevold
  • J. Braun
  • M. Weigand
  • M. Hecker
  • V. Agnoletti
  • F. Coccolini
  • F. Catena
  • W. Padberg... i 109 innych

  - World Journal of Emergency Surgery - Rok 2023

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• Current-based higher-order spectral covariance as a bearing diagnostic feature for induction motors

  Publikacja

  • T. Ciszewski
  • L. Gelman
  • L. Swędrowski

  - INSIGHT - Rok 2016

  Conducting the diagnosis of induction motors remotely by analyzing the supply current is an attractive prospect with the lack of access to the engine. Currently, there is no solution, based on analysis of the current, the credibility of which would allow its use in industry. The statistics of bearing failures in induction motors indicate that they constitute more than 40% of induction motor damage, therefore, bearing diagnosis...

• Trimethylamine N-oxide and the reverse cholesterol transport in cardiovascular disease: a cross-sectional study

  Publikacja

  • L. Bordoni
  • J. J. Samulak
  • A. K. Sawicka
  • I. Pelikant-Malecka
  • A. Radulska
  • L. Lewicki
  • L. Kalinowski
  • R. Gabbianelli
  • R. Olek

  - Scientific Reports - Rok 2020

  The early atherosclerotic lesions develop by the accumulation of arterial foam cells derived mainly from cholesterol-loaded macrophages. Therefore, cholesterol and cholesteryl ester transfer protein (CETP) have been considered as causative in atherosclerosis. Moreover, recent studies indicate the role of trimethylamine N-oxide (TMAO) in development of cardiovascular disease (CVD). The current study aimed to investigate the association...

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• The buckling analysis of a cold-formed steel C-sectional column resting on an elastic foundation

  Publikacja

  • P. Deniziak
  • P. Iwicki

  - MATEC Web of Conferences - Rok 2018

  The paper is focused on stability analysis of different models of steel cold-formed C-section column. The analysed element may be applied as a primary load-bearing member in steel trusses or silo columns. The column can be used as a support for a wall of roof plates made of corrugated sheets. The wall sheeting that restrains the column against buckling may be considered as an elastic foundation. Due to the design solutions the...

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• Novel Fault Identification for Electromechanical Systems via Spectral Technique and Electrical Data Processing

  Publikacja

  • T. Ciszewski
  • L. Gelman
  • A. Ball

  - Electronics - Rok 2020

  It is proposed, developed, investigated, and validated by experiments and modelling for the first time in worldwide terms new data processing technologies, higher order spectral multiple correlation technologies for fault identification for electromechanical systems via electrical data processing. Investigation of the higher order spectral triple correlation technology via modelling has shown that the proposed data processing technology...

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• Optimum number of actuators to minimize the cross-sectional area of prestressable cable and truss structures

  Publikacja

  • A. Manguri
  • N. Saeed
  • F. Kazemi
  • M. Szczepański
  • R. Jankowski

  - Structures - Rok 2023

  This paper describes a new computational method for determining the optimum number of actuators to design the optimal and economic cross-sectional area of pin-jointed assemblies based on the conventional force method. The most active members are selected to be prestressed to redistribute stress in the whole structure, resulting in regulating the internal force of bars that face high stress. Reducing stress in critical members allows...

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• Analyzing the Impact of Simulated Multispectral Images on Water Classification Accuracy by Means of Spectral Characteristics

  Publikacja

  • K. Michałowska
  • E. Głowienka

  - Geomatics and Environmental Engineering - Rok 2020

  Remote sensing is widely applied in examining the parameters of the state and quality of water. Spectral characteristics of water are strictly connected with the dispersion of electromagnetic radiation by suspended matter and the absorp-tion of radiation by water and chlorophyll a and b.Multispectral sensor ALI has bands within the ranges of electromagnetic radia-tion: blue and infrared, absent in sensors such as Landsat, SPOT,...

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• A Measurement System for Quasi-Spectral Determination of Absorption and Scattering Parameters of Veterinary Tissue Phantoms

  Publikacja

  • P. Listewnik
  • M. Wąsowicz
  • M. Kosowska
  • A. Mazikowski

  - Applied Sciences-Basel - Rok 2019

  This paper describes the construction of a system for the quasi-spectral determination of absorption and scattering parameters of animal tissue phantoms. Several tissue phantoms, including one reference and two modified for examination, were prepared from polydimethylsiloxane (PDMS). The phantoms were measured using a system based on an integrating sphere and the light sources of wavelengths commonly used for the treatment of various...

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• Spectral criterion for high-cycle fatigue of metals under multiaxial static and stochastic loading.

  Publikacja

  • J. Kolenda

  - Rok 2004

  Praca dotyczy oceny zmęczenia metali ciągliwych w złożonych stanach wieloosiowych obciążeń statycznych i dynamicznych, przy założeniu, że składowe naprężenia są stacjonarnymi procesami stochastycznymi, które są stacjonarnie skorelowane i różniczkowalne w sensie średniokwadratowym. Przyjmując, że wartości średnie i gęstości widmowe mocy tych procesów są znane, sformułowano kryterium ograniczonej trwałości zmęczeniowej w dziedzinie...

• Spectral criterion for high-cycle fatigue of anisotropic metals under multiaxial random loads

  Publikacja

  • J. Kolenda

  - Rok 2005

  Praca dotyczy oceny ograniczonej trwałości zmęczeniowej metali ciągliwych, poddanych wieloosiowym obciążeniom statycznym i dynamicznym. Zakłada się, że kartezjańskie składowe tensora naprężenia są sumą losowych wartości średnich o znanych drugich momentach statystycznych i stacjonarnych procesów stochastycznych o znanych gęstościach widmowych mocy. Przyjmując, że procesy te są stacjonarnie skorelowane, różniczkowalne w sensie średnio-kwadratowym...

• Remarks on evaluation of spectral radius of operators arising in WR methods for linear systems of ODEs

  Publikacja

  • Z. Bartoszewski
  • M. Kwapisz

  - APPLIED NUMERICAL MATHEMATICS - Rok 2006

  W pracy omawiane są różne metody oszacowania promienia spektralnego. Do oszacowań tych użyto elementarnych metod. Jedną z nich jest metoda wykorzystująca normę Bieleckiego. Jedną z zalet takich metod wyraźnie widać na przykładzie równań różniczkowych z opóźnieniem, gdzie oszacowania promienia spektralnego zależą od charakteru opóźnienia.

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• Performance of the flat plate solar collector operated with water-Al2O3 nanofluid

  Publikacja

  • J. Cieśliński
  • B. Dawidowicz
  • A. Popakul

  - Rok 2015

  This paper shows the experimental results of the performance a flat plate solar collector with water-Al2O3 nanofluid as a working fluid. The weight fractions of nanoparticles were 0.1%, 0.2% and 0.4%. The volume flow rate of nanofluid varied from 60 l/h to 170 l/h. The results show that application of nanofluids instead of pure water resulted in higher efficiency of the tested flat plate solar collector for given range of thermal...

• Enhanced photoelectrochemical and photocatalytic performance of iodine-doped titania nanotube arrays

  Publikacja

  • K. Siuzdak
  • M. Szkoda
  • M. Sawczak
  • A. Lisowska-Oleksiak
  • J. Karczewski
  • J. Ryl

  - RSC Advances - Rok 2015

  The paper discusses the synthesis and performance of iodine doped titania nanotube arrays exhibited under irradiation. The doping procedure was performed as an additional, electrochemical process carried out after formation of nanotube arrays via anodization of Ti substrate. The optical and structural properties were characterized using Raman, UV-vis, photoluminescence and X-ray photoelectron spectroscopy. The surface morphology...

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• Microjet technology as a perspective intensification method for high performance heat exchangers

  Publikacja

  • D. Mikielewicz
  • J. Wajs
  • M. Bajor

  - Rok 2015

  In the paper two oryginal designs of compact heat exchangers with intensification effect produced by microjets are presented. The technology of microjets manufacturing is an "inhouse" patented design. The idea of such heat exchanger is shown together with the flow and thermal characteristics of the prototypes. The results of performer measurements are satisfactory and encourage for further research of the original designs.

• Three solvers for MIMO noise radar clutter cancellation - a performance comparison

  Publikacja

  • M. Meller

  - Rok 2015

  The problem of canceling strong clutter echos in a MIMO noise radar is considered. Execution times of three algorithms is compared. The first solution is a standard Least Squares approach employing Cholesky decomposition of the transmitted signal sample autocorrelation matrix. The second approach is based on careful waveform design which guarantees that the signal sample autocorrelation matrix has Toeplitz structure. This enables...

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• Tribological performance of PTFE-metal binary coatings in rolling/sliding contact

  Publikacja

  • T. Stolarski
  • M. Yamane

  - TRIBOLOGY LETTERS - Rok 2012

  Tribological performance of surface coatings with embedded PTFE reservoirs in rolling/sliding contact is reported. Using two different coating materials and two shapes and patterns of PTFE reservoirs test samples in the form of discs were prepared and tested in a four-ball contact configuration under loads corresponding to nominal contact pressure of 0.5 and 1.0 GPa. It was found that one coating, namely aluminium-bronze with embedded...

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• Enhancing Performance of Switched Parasitic Antenna for Localization in Wireless Sensor Networks

  Publikacja

  • M. Rzymowski
  • K. Nyka
  • Ł. Kulas

  - Rok 2012

  This paper presents an Electronically Steerable Parasitic Array Radiator (ESPAR) antenna with enhanced performance of estimating the incoming signal direction. Designed antenna is dedicated for 2.4 GHz ISM applications with emphasis on Wireless Sensor Networks (WSN). The limitations of the existing design approach are illustrated, as well as perspectives and challenges of the proposed solution in relation to the localization in...

• Simulation model for assessment of IMS-based NGN call processing performance

  Publikacja

  • S. Kaczmarek
  • M. Kaszuba
  • M. Sac

  - Rok 2012

  In current telecommunications it is assumed that demands of information society for quickly delivered services will be satisfied by Next Generation Network (NGN) architecture, which includes IP Multimedia Subsystem (IMS) elements. To guarantee Quality of Service (QoS), proper design and dimensioning of NGN is absolutely necessary, for which appropriate models have to be proposed. As NGN architecture is very complicated, the most...

• Verification of ESPAR Antennas Performance in the Simple and Calibration Free Localization System

  Publikacja

  • M. Rzymowski
  • P. Woźnica
  • Ł. Kulas

  - Rok 2013

  This paper presents the results of simulations and measurements of an indoor localization system that uses Electronically Steerable Parasitic Array Radiator (ESPAR) antennas with switched directional beam. Proposed antennas are dedicated for 2.4GHz ISM low-cost applications where determination of the incoming signal is required. The antennas performance is analyzed and verified with relation to positioning methods based on the...

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• Modeling of Performance, Reliability and Energy Efficiency in Large-Scale Computational Environments

  Publikacja

  • J. Kuchta

  - Rok 2013

  Large scale of complexity of distributed computational systems imposes special challenges for prediction of quality in such systems. Existing quality models for lower-scale systems include functionality, performance, reliability, flexibility and usability. Among these attributes, performance and reliability have a particular significance to the large-scale systems computing quality modeling due to their strong dependence on the...

• Effect of Coating Material Properties on Tilting-pad Thrust Bearing Performance

  Publikacja

  • M. Wodtke
  • M. Wasilczuk

  - Rok 2013

  Polymer lined tilting-pad bearings demonstrate many advantages over traditional bearing systems. Bearings with a polymer layer in comparison with a babbitted layer show, for example: lower value of friction coefficient (important during start/stops), higher fatigue strength of the coating, better distribution of the load on individual pads due to lower elasticity of the polymers, wider range of operational temperatures or the ability...

• Photocatalytic performance of titania nanospheres deposited on graphene in coumarin oxidation reaction

  Publikacja

  • M. Wojtoniszak
  • B. Zielinska
  • R. Kalenczuk
  • E. Mijowska

  - Materials Science-Poland - Rok 2012

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• Palladium nanoparticles deposited on graphene and its electrochemical performance for glucose sensing

  Publikacja

  • E. Mijowska
  • M. Onyszko
  • K. Urbas
  • M. Aleksandrzak
  • X. Shi
  • D. Moszyński
  • K. Penkala
  • J. Podolski
  • M. El

  - Applied Surface Science - Rok 2015

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• Performance evaulation of video object tracking algorithm in autonomous surveillance system

  Publikacja

  • M. Szczodrak
  • P. Dalka
  • A. Czyżewski

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Rok 2010

  Results of performance evaluation of a video object tracking algorithm are presented. The method of moving objects detection and tracking is based on background modelling with mixtures of Gaussians and Kalman filters. An emphasis is put on algorithm's efficiency with regards to its settings. Utilized methods of performance evaluation based on comparison of algorithm output to manually prepared reference data are introduced. The...

• Performance evaluation of video object tracking algorithm in autonomous surveillance system

  Publikacja

  • M. Szczodrak
  • P. Dalka
  • A. Czyżewski

  - Rok 2010

  Results of performance evaluation of a video object tracking algorithm are presented. The method of moving objects detection and tracking is based on background modelling with mixtures of Gaussians and Kalman filters. An emphasis is put on algorithm's efficiency with regards to its settings. Utilized methods of performance evaluation based on comparison of algorithm output to manually prepared reference data are introduced. The...

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• Influence of permanent magnetic field on wear performance of dry sliding contacts

  Publikacja

  • T. Stolarski

  - WEAR - Rok 2011

  Results of experimental studies concerning the influence of permanent magnetic field on wear of dry sliding contact are presented.It was found that magnetic field of horizontal orientation is causing temporary reduction of material's hardness. It also facilitates and accelerates removal process of wear particles from the contact zone.Formation of bulges, consisting of accumulated and compacted anti-ferromagnetic material produced...

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• A spice equivalent circuit for modeling the performance of dual frequency echo-sounder

  Publikacja

  • M. Moszyński
  • W. Lis

  - HYDROACOUSTICS - Rok 2011

  The paper presents novel network equivalent circuit of piezoceramic circular disc transducers that takes into account thickness and radial mode of vibrations. The starting point of the analysis is 4-port description of circular disc element representing the solution of wave equation set in radial and thickness directions. The approximate solution for harmonic case is represented in the form of 4x4 matrix, which is synthesised and...

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• Using phase of short-term Fourier transform for evaluation of spectrogram performance

  Publikacja

  • K. Czarnecki
  • M. Moszyński
  • A. Chybicki

  - HYDROACOUSTICS - Rok 2011

  The concept of spectrogram performance evaluation which exploits information on phase of short-term Fourier transform (STFT) is presented. A spectrograph which is time-frequency analyzing tool, is compared to a filter bank that demultiplexes a signal. Local group delay (LGD) and channelized instantaneous frequency (CIF) is obtained for each filtered component signal. In presented solution the performance is evaluated using so-called...

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• Performance Measurements of Real Time Video Transmission from Car Patrol

  Publikacja

  • M. Szczodrak
  • A. Ciarkowski
  • B. Głowacki
  • K. Kacperski

  - Communications in Computer and Information Science - Rok 2011

  The HSUPA technology application to video streaming from moving vehicle to the central server is presented in the paper. A dedicated software for transmission control in case of non public IP address is employed. Quality of video streaming in urban area was measured. Several car routes were investigated in the area of the Polish Tricity. Measurements pointed out that the real time streaming quality during vehicle movement is sufficient...

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• Performance analysis of mobility protocols and handover algorithms for IP-based networks

  Publikacja

  • J. Woźniak
  • P. Machań
  • K. Gierłowski
  • T. Gierszewski
  • M. Hoeft
  • M. Lewczuk

  - Rok 2011

  A rapid growth of IP-based networks and services has created the vast collection of resources and functionality available to users by means of a universal method of access - an IP protocol. At the same time, advances in design of mobile electronic devices have allowed them to reach utility level comparable to stationary, desktop computers, while still retaining their mobility advantage. Following this trend multiple extensions...

• Performance Evaluation of the Parallel Codebook Algorithm for Background Subtraction in Video Stream

  Publikacja

  • G. Szwoch

  - Communications in Computer and Information Science - Rok 2011

  A background subtraction algorithm based on the codebook approach was implemented on a multi-core processor in a parallel form, using the OpenMP system. The aim of the experiments was to evaluate performance of the multithreaded algorithm in processing video streams recorded from monitoring cameras, depending on a number of computer cores used, method of task scheduling, image resolution and degree of image content variability....

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• Examples of a use of the optimal control at energy performance index in mechatronic approach

  Publikacja

  • K. J. Kaliński
  • M. Chodnicki
  • M. Mazur

  - Acta Mechanica et Automatica - Rok 2008

  W pracy zaprezentowano przykłady zastosowania sterowania optymalnego przy energetycznym wskaźniku jakości w rozwiązaniach mechatronicznych. Rozważano układy mechaniczne modelowane dyskretnie. Metody sterowania optymalnego znalazły zastosowanie w robotyce (kołowe roboty mobilne jako układy silnie nieliniowe) oraz obróbce szybkościowej przedmiotów podatnych frezem kulistym.

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• New components for hydraulic drive systems and their performance in thermal shock conditions

  Publikacja

  • R. Jasiński
  • L. Osiecki

  - Rok 2009

  Artykuł prezentuje konstrukcję pomp z rozrządem krzywkowym typu PWK o zmiennej wydajności wraz ze wstępnymi wynikami badań prototypu PWKZ-78. Przedstawiono także wstępne wyniki analiz MES i CFD zjawisk zachodzących w pracującej pompie. W drugiej części zaprezentowano metodykę badań zachowania się pomp w warunkach szokutermicznego i wyniki uzyskane dla pompy typu PWK.

• The Effects of Silver Ion Implantation on Structural and Morphological Performance of Hydroxyapatite Coatings

  Publikacja

  • K. Suchanek
  • D. Sobol
  • M. Mitura-Nowak
  • M. Perzanowski
  • M. Marszałek

  - Acta Physica Polonica A - Rok 2020

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• Characterization of aggregate interlocking in hot mix asphalt by mechanistic performance tests

  Publikacja

  • P. Polaczyk
  • Y. Ma
  • R. Xiao
  • W. Hu
  • X. Jiang
  • B. Huang

  - Road Materials and Pavement Design - Rok 2021

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• Can the Cambered Bar Enhance Acute Performance in the Bench Press Exercise?

  Publikacja

  • M. Krzysztofik
  • A. Zajac
  • P. Żmijewski
  • M. Wilk
  • M. Krzysztofik

  - Frontiers in Physiology - Rok 2020

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