Wyniki wyszukiwania dla: high speed data transmission monitoring

• Earth wires currents calculation by tableau analysis

  Publikacja

  • J. Klucznik

  - ELECTRIC POWER SYSTEMS RESEARCH - Rok 2017

  The paper presents a new method to compute a phase-to-earth fault current distribution in overhead transmission line. The method is based on the tableau analysis of an unbalanced, multi-wire model of a transmission line. It allows for the calculation of current distribution in overhead earth wires along the transmission line. Additionally, it may be used to calculate currents in a tower’s earthing system as well as voltages over...

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• Analysis of High Resolution Clouds of Points as a Source of Biometric Data

  Publikacja

  • K. Bobkowska
  • A. Janowski
  • M. Przyborski
  • J. Szulwic

  - Rok 2016

  The article presents the analysis devoted to human face data obtained by means of precise photographic scanners. Collected point clouds were used to make high precision meshes of human face. The essence of these studies is the comparison of relative features as well as the comparison of absolute models which require as precisely as possible matching of face models. The article focuses on the analysis of various parts of the human...

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• Modeling the impact of discretizing rotor angular position on computation of field-oriented current components in high speed electric drives

  Publikacja

  • L. Jarzębowicz

  - APPLIED MATHEMATICAL MODELLING - Rok 2017

  Modern drives consist of alternating current electric motors, and the field-oriented control (FOC) of such motors enables fast, precise, and robust regulation of a drive's mechanical variables such as torque, speed, and position. The control algorithm, implemented in a microprocessor, requires feedback from motor currents, and the quality of this feedback is essential to a drive's control properties. Motor phase currents are sampled...

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• Fiber optic interface channels for united data and power supply transmission for neutral interaction application in signal transmission networks

  Publikacja

  • V. Malinovskyi
  • R. Romaniuk
  • D. Harasim
  • A. Kalizhanova
  • R. S. Romaniuk

  - Rok 2019

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• Mono- and bimetallic (Pt/Cu) titanium(IV) oxide photocatalysts. Physicochemical and photocatalytic data of magnetic nanocomposites’ shell

  Publikacja

  • Z. Bielan
  • K. Ewa
  • S. Dudziak
  • K. Wang
  • B. Ohtani
  • A. Zielińska-Jurek

  - Data in Brief - Rok 2020

  Surface modification of titania with noble and semi-noble metals resulted in significant enhancement of photocatalytic activity. Presented data, showing the photocatalytic properties of TiO2-M (where M is Pt and/or Cu) photocatalysts were further used as Fe3O4@SiO2/TiO2-M magnetic nanocomposites shells in "Mono- and bimetallic (Pt/Cu) titanium(IV) oxide core-shell photocatalysts with Vis light activity and magnetic separability"...

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• Implementation of an Adaptive Method for Changing the Frequency Division of the Counter Clock Signal in a Frequency-to-Code Converter

  Publikacja

  • D. Świsulski
  • P. Warda

  - ENERGIES - Rok 2023

  Processing physical quantities into an indirect signal is a standard method of transferring information about the measured quantity to the master system, which analyzes the data obtained from the acquisition system. The intermediate signal is very often the voltage, but another transmission medium can be the frequency of the output signal of the “physical quantity-to-frequency” converter. The article presents the implementation...

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• Time-of-flight electron scattering from molecular hydrogen: Benchmark cross sections for excitation of the X1Σ+g→b3Σ+u transition

  Publikacja

  • M. Zawadzki
  • R. Wright
  • G. Dolmat
  • M. Martin
  • L. Hargreaves
  • D. Fursa
  • M. Zammit
  • L. Scarlett
  • J. Tapley
  • J. Savage... i 2 innych

  - PHYSICAL REVIEW A - Rok 2018

  The electron impact X1Σ+g to b3Σ+u transition in molecular hydrogen is one of the most important dissociation pathways to forming atomic hydrogen atoms, and is of great importance in modeling astrophysical and industrial plasmas where molecular hydrogen is a substantial constituent. Recently it has been found that the convergent close-coupling (CCC) cross sections of Zammit et al. [Phys. Rev. A 95, 022708 (2017)] are up to a factor...

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• Audio Content and Crowdsourcing: A Subjective Quality Evaluation of Radio Programs Streamed Online

  Publikacja

  • P. Falkowski-Gilski

  - Rok 2023

  Radio broadcasting has been present in our lives for over 100 years. The transmission of speech and music signals accompanies us from an early age. Broadcasts provide the latest information from home and abroad. They also shape musical tastes and allow many artists to share their creativity. Modern distribution involves transmission over a number of terrestrial systems. The most popular are analog FM (Frequency Modulation) and...

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• Local structural and chemical ordering of nanosized Pt(3±δ)Co probed by multiple-scattering x-ray absorption spectroscopy

  Publikacja

  • G. Greco
  • A. Witkowska
  • E. Principi
  • M. Minicucci
  • A. Di Cicco

  - PHYSICAL REVIEW B - Rok 2011

  This work reports a detailed investigation of the local structure and chemical disorder of a Pt(3±δ)Co thin film and Pt(3±δ)Co nanoparticles. We have used a combination of techniques including x-ray absorption spectroscopy (XAS), x-ray diffraction (XRD), and high-resolution transmission electron microscopy (TEM). The important effect of chemical ordering on pair and three-atom configurations has been studied using computer simulations...

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• Metamaterial-Based Sub-Microwave Electromagnetic Field Energy Harvesting System

  Publikacja

  • M. Nowak

  - ENERGIES - Rok 2021

  This paper presents the comprehensive analysis of the sub-microwave, radio frequency band resonant metastructures’ electromagnetic properties with a particular emphasis on the possibility of their application in energy harvesting systems. Selected structures based on representative topologies of metamaterials have been implemented in the simulation environment. The models have been analyzed and their substitute average electromagnetic...

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• Towards High-Value Datasets Determination for Data-Driven Development: A Systematic Literature Review

  Publikacja

  • A. Nikiforova
  • N. Rizun
  • M. Ciesielska
  • C. H. Alexopoulos
  • A. Miletić

  - Rok 2023

  Open government data (OGD) is seen as a political and socio-economic phenomenon that promises to promote civic engagement and stimulate public sector innovations in various areas of public life. To bring the expected benefits, data must be reused and transformed into value-added products or services. This, in turn, sets another precondition for data that are expected to not only be available and comply with open data principles,...

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• Modeling the impact of rotor movement on non-linearity of motor currents waveforms in high-speed PMSM drives

  Publikacja

  • L. Jarzębowicz
  • S. Mirchevski

  - Rok 2017

  Motor current measurement techniques as well as predictive control algorithms for electric drives rely on an assumption of linear motor currents changes resulting from constant inverter output voltages. Recent research has reported that this assumption does not hold in motors with short electrical time constant, and in drives whose rotor position advances substantially during a control period. This paper proposes a simulation model...

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• DATABASE AND BIGDATA PROCESSING SYSTEM FOR ANALYSIS OF AIS MESSAGES IN THE NETBALTIC RESEARCH PROJECT

  Publikacja

  • M. Lewczuk
  • P. Cichocki
  • J. Woźniak

  - TASK Quarterly - Rok 2017

  A specialized database and a software tool for graphical and numerical presentation of maritime measurement results has been designed and implemented as part of the research conducted under the netBaltic project (Internet over the Baltic Sea – the implementation of a multi-system, self-organizing broadband communications network over the sea for enhancing navigation safety through the development of e-navigation services.) The...

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• Stable Field Electron Emission and Plasma Illumination from Boron and Nitrogen Co‐Doped Edge‐Rich Diamond‐Enhanced Carbon Nanowalls

  Publikacja

  • M. Ficek
  • B. Dec
  • K. J. Sankaran
  • K. Gajewski
  • P. Tatarczak
  • I. Wlasny
  • A. Wysmolek
  • K. Haenen
  • T. Gotszalk
  • R. Bogdanowicz

  - Advanced Materials Interfaces - Rok 2021

  Superior field electron emission (FEE) characteristics are achieved in edge-rich diamond-enhanced carbon nanowalls (D-ECNWs) grown in a single-step chemical vapor deposition process co-doped with boron and nitrogen. The structure consists of sharp, highly conductive graphene edges supplied by a solid, diamond-rich bottom. The Raman and transmission electron microscopy studies reveal a hybrid nature of sp3-diamond and sp2-graphene...

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• Architecture of security and application layer structure of radio system for monitoring and acquisition of data from traffic enforcement cameras

  Publikacja

  • S. Gajewski
  • M. Gajewska
  • M. Sokół
  • K. Lembicz

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Rok 2010

  The study presents architecture of security and application layer structure of Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras. It also provides general assumptions concerning the range of the system as well as its modules and application components.

• Oil refinery dusts: morphological and size analysis by TEM

  Publikacja

  • P. Sielicki
  • H. Janik
  • A. Guzman - Sielicka
  • M. Broniszewski
  • J. Namieśnik

  - ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2011

  The objectives of this work were to develop a means of sampling atmospheric dusts on the premises of an oil refinery for electron microscopic study to carry out preliminary morphological analyses and to compare these dusts with those collected at sites beyond the refinery limits. Carbon and collodion membranes were used as asupport for collection of dust particles straight on transmission electron microscopy (TEM) grids. Micrographs...

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• State-of-the-art framework for high-speed camera and photogrammetric use in geometry evaluation of prestressed concrete failure process

  Publikacja

  • P. Ziółkowski
  • J. Szulwic
  • K. Nagrodzka-Godycka

  - Rok 2016

  Prestressed structures are a key to the realization of the boldest architectural ideas, regardless of shape complexity, great height and large span. A characteristic feature of the prestressed structure is the better use of concrete material properties by insertion of internal forces. The internal forces are opposed to external loads effects (forces and deformations of structure). Prestressed reinforced concrete beams are characterized...

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• Establishment of the Right of Electricity Transmission Easement Through Court Proceedings

  Publikacja

  • M. Busko
  • K. Elzbieciak
  • P. Wysocki

  - Rok 2017

  Including the amendment of the Civil Code Act on May 30, 2008, issues related to the right of easement of transmission were introduced to it. Such a regulation was necessary in view of the need to define the legal status of transmission facilities, existing and designed on real estate property. The purpose of the study is to analyze issues related to the definition of the spatial extent of the law of transmission easement for power...

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• Sensorless control of high speed permanent-magnet synchronous motor

  Publikacja

  • S. Bujacz
  • A. Cichowski
  • P. Szczepankowski
  • J. Nieznański

  - Rok 2009

  W artykule przedstawiono metodę bezczujnikowego sterowania szybkoobrotowym silnikiem z magnesami trwałymi. Pokazano działanie układu sterowania opartego na filtrze kalmana (EKF) jako obserwatora prędkości obrotowej.

• High-speed binary-to-residue converter with the reduced input layer

  Publikacja

  • M. Czyżak

  - Rok 2007

  przedstawiono architekturę szybkiego konwertera z systemu binarnego do systemu resztowego dla modułów 5-bitowych. Algorytm konwersji oparty jest na dodawaniu binarnym reszt potęg liczby 2 obliczonych modulo m i redukcji modulo m sumy dla poszczególnych modułów bazy systemu resztowego. Warstwa wejciowa konwertera jest redukowana poprzez wykorzystanie wspólnych elementów układu dla odpowiednio zestawionych par modułów.

• Sensorless Startup of Super High Speed Permanent Magnet Motor

  Publikacja

  • A. Cichowski
  • S. Bujacz
  • J. Nieznański
  • P. Szczepankowski

  - Rok 2010

  Celem artykułu jest przedstawienie metody bezczujnikowego rozruchu wysokoobrotowego silnika z magnesami trwałymi. Zastosowano dwa typy metod sterowania. W pierwszej fazie rozruchu zastosowano metodę sterowania prądem, następnie przełączono do trybu sterowania wektorowego. Przy sterowaniu wektorowym zostały użyte: rozszerzony filtr Kalmana (EKF) oraz alternatywny Bezśladowy Filtr Kalmana (UKF) jako obserwatory prędkości obrotowej....

• High-speed residue-to-binary converter based on the Chinese RemainderTheorem.

  Publikacja

  • M. Czyżak

  - Rok 2004

  Przedstawiono szybki konwerter z systemu resztowego do systemu binarnego dla modułów 5-bitowych oparty o chińskie twierdzenie o resztach. Projekcje ortogonalne są generowane przy użyciu odwzorowania realizowanego przy zastosowaniu funkcji logicznych pięciu zmiennych. Wartość wyjściowa jest obliczana przy użyciu drzewaWallace'a z segmentacją wektorów wyjściowych i redukcją do 2M, M zakres liczbowy systemu oraz efektywny finalny...

• Secure access control and information protection mechanisms in radio system for monitoring and acquisition of data from traffic enforcement cameras

  Publikacja

  • M. Sokół
  • M. Gajewska
  • S. Gajewski
  • A. Marczak

  - Logistyka - Rok 2010

  The study presents the architecture of the Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras (in short: RSMAD), particularly concerning access control and protection of confidential data. RSMAD security structure will be discussed in relation to network security issues. Additionally, the paper presents the results of the work associated with the modelling of potential threats to system security.

• Broadband communication solutions for maritime ITSs: Wider and faster deployment of new e-navigation services

  Publikacja

  • J. Woźniak
  • K. Gierłowski
  • M. Hoeft

  - Rok 2017

  n its initial part, the paper presents an overview of popular technologies and systems currently developed or employed in maritime communication. These solutions are used to provide both ship-to-ship and ship-to-shore communication for the purpose of supporting specific services, often dedicated to maritime safety and e-navigation. Utility of such communication systems have been thoroughly verified over the years and their strengths...

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• A facile method for Tauc exponent and corresponding electronic transitions determination in semiconductors directly from UV–Vis spectroscopy data

  Publikacja

  • Ł. Haryński
  • A. Olejnik
  • K. Grochowska
  • K. Siuzdak

  - OPTICAL MATERIALS - Rok 2022

  In this work, a facile method allowing for estimation of the exponent in the Tauc equation directly from the UV–vis spectra is presented. It is based on the Taylor expansion of the logarithmic version of the Tauc equation. The Tauc exponent is calculated from the tangent slope of the absorption data. Knowledge of this coefficient provides information about the optical transition types and is used as an input for the calculations...

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• Mitigation effect of face shield to reduce SARS-CoV-2 airborne transmission risk: Preliminary simulations based on computed tomography

  Publikacja

  • K. Tesch
  • A. Skorek
  • D. Tretiakow

  - ENVIRONMENTAL RESEARCH - Rok 2021

  We aimed to develop a model to quantitatively assess the potential effectiveness of face shield (visor) in reducing airborne transmission risk of the novel coronavirus SARS-CoV-2 during the current COVID-19 pandemic using the computational fluid dynamics (CFD) method. The studies with and without face shield in both an infected and healthy person have been considered in indoor environment simulation. In addition to the influence...

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• Mitigation effect of face shield to reduce SARS-CoV-2 airborne transmission risk: Preliminary simulations based on computed tomography

  Publikacja

  • D. Tretiakov
  • K. Tesch
  • A. Skorek
  • D. Tretiakow

  - ENVIRONMENTAL RESEARCH - Rok 2021

  We aimed to develop a model to quantitatively assess the potential effectiveness of face shield (visor) in reducing airborne transmission risk of the novel coronavirus SARS-CoV-2 during the current COVID-19 pandemic using the computational fluid dynamics (CFD) method. The studies with and without face shield in both an infected and healthy person have been considered in indoor environment simulation. In addition to the influence...

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• Study of the optical rotatory of potassium titanyl phosphate using the advanced dual-wavelength polarimetric method

  Publikacja

  • M. Shopa
  • N. Ftomyn
  • Y. Shopa

  - OPTO-ELECTRONICS REVIEW - Rok 2024

  A dual-wavelength high-accuracy universal polarimeter was applied to the circular birefringence and optical activity measurement in potassium titanyl phosphate (KTP) nonlinear crystal. The experimental setup used two single-mode He-Ne lasers with close wavelengths of 594 and 633 nm as light sources. Measurement has been carried out for two crystal settings in directions of a 45-degree relative angle to the [100] and [010] crystallographic...

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• Mask Detection and Classification in Thermal Face Images

  Publikacja

  • N. Kowalczyk
  • M. Sobotka
  • J. Rumiński

  - IEEE Access - Rok 2023

  Face masks are recommended to reduce the transmission of many viruses, especially SARS-CoV-2. Therefore, the automatic detection of whether there is a mask on the face, what type of mask is worn, and how it is worn is an important research topic. In this work, the use of thermal imaging was considered to analyze the possibility of detecting (localizing) a mask on the face, as well as to check whether it is possible to classify...

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• Tuning the photocatalytic performance through magnetization in Co-Zn ferrite nanoparticles

  Publikacja

  • L. Cervera-Gabalda
  • A. Zielińska-Jurek
  • C. Gómez-Polo

  - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS - Rok 2022

  In this work, the link between the photocatalytic performance of Co-Zn ferrite nanoparticles and the net magnetic moment is analyzed. CoxZn1-xFe2O4 nanoparticles (0 ≤ x ≤ 1) were synthesized by co-precipitation method and different physicochemical techniques were employed to characterize the samples (X-ray diffraction, Transmission Electron Microscopy (TEM), BET surface area, Diffuse Reflectance Spectroscopy (DRS), Photoluminescence spectroscopy,...

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• Reliability assessment of an OVH HV power line truss transmission tower subjected to seismic loading

  Publikacja

  • K. Winkelmann
  • P. Jakubowska
  • B. Sołtysik

  - Rok 2017

  The study focuses on the reliability of a transmission tower OS24 ON150 + 10, an element of an OVH HV power line, under seismic loading. In order to describe the seismic force, the real-life recording of the horizontal component of the El Centro earthquake was adopted. The amplitude and the period of this excitation are assumed random, their variation is described by Weibull distribution. The possible space state of the phenomenon...

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• High-speed multi-stage gas-steam turbine with flow bleeding in a novel thermodynamic cycle for decarbonizing power generation

  Publikacja

  • P. Ziółkowski
  • Ł. Witanowski
  • P. Klonowicz
  • D. Mikielewicz

  - RENEWABLE ENERGY - Rok 2024

  In the global pursuit of sustainable energy and reduced carbon footprints, advances in power generation techniques play a crucial role, not only in meeting the ever-increasing energy demands but also in ensuring that environmental standards are maintained and that the health of our planet is prioritized for future generations. In the ongoing quest for sustainable energy solutions, novel high-speed multi-stage gas-steam turbine...

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• Self-organized multilayered graphene-boron doped diamond hybrid nanowalls for high performance electron emission devices

  Publikacja

  • K. J. Sankaran
  • M. Ficek
  • S. Kunuku
  • P. Kalpataru
  • C. Yeh
  • J. Park
  • M. Sawczak
  • P. Michałowski
  • K. Leou
  • R. Bogdanowicz... i 2 innych

  - NANOSCALE - Rok 2018

  Carbon nanomaterials like nanotubes, nanoflakes/nanowalls and graphene have been used as electron sources due to their superior field electron emission (FEE) characteristics. Nevertheless, these materials show poor stability and a short lifetime, preventing them from being used in practical device applications. The intention of this study was to find an innovative nanomaterial, possessing both high robustness and reliable FEE behavior....

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• Narrowband Transmission Quality in Presence of Modified IEEE 802.15.4a UWB Signal

  Publikacja

  • J. Sadowski
  • R. Katulski

  - Rok 2010

  This paper presents results of measurement of narrowband transmission quality in presence of impulse radio UWB interference. In the first part of paper, unmodified IEEE 802.15.4a IR UWB signal is used. Then some modification of transmitted pulse sequence is proposed, which allow to reduce UWB power spectral density at frequency of narrowband transmission. Finally narrowband transmission quality in presence of modified ultrawideband...

• Power and energy measurement problems in transmission line between Poland-Lithuania

  Publikacja

  • Z. Lubośny
  • J. Klucznik
  • K. Dobrzyński
  • S. Pokora
  • R. Trębski

  - Rok 2016

  The paper discusses problem of power and energy metering in double circuit overhead transmission line. Considerations are based on example of transmission line connecting Polish substation Bis Elk and Lithuanian substation Alytus.

• Improvement of microstructure and mechanical properties of high dense sic ceramics manufactured by high-speed hot pressing

  Publikacja

  • V. Voyevodin
  • S. Sayenko
  • K. Lobach
  • R. Tarasov
  • A. Zykova
  • Y. Svitlychnyi
  • A. Surkov
  • V. Abelentsev
  • M. H. Ghaemi
  • M. Szkodo... i 3 innych

  - Problems of Atomic Science and Technology - Rok 2017

  Non-oxide ceramics possess high physical-mechanical properties, corrosion and radiation resistance, which can be used as a protective materials for radioactive wastes disposal. The aim of the present study was the manufacturing of high density SiC ceramics with advanced physical and mechanical parameters. The high performance on the properties of produced ceramics was determined by the dense and monolithic structure. The densified...

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• The influence of polypropylene-block/graft-polycaprolactone copolymers on melt rheology, morphology, and dielectric properties of polypropylene/polycarbonate blends

  Publikacja

  • A. Ginzburg
  • V. Ramakrishnan
  • L. Rongo
  • A. Rozanski
  • M. Bouyahyi
  • L. Jasińska-Walc
  • R. Duchateau

  - RHEOLOGICA ACTA - Rok 2020

  The paper discusses the relationship between rheology and morphology of immiscible polypropylene (matrix))/polycarbonate (dispersed phase) blends compatibilized with novel polypropylene-polycaprolactone block and graft copolymers. Transmission electron microscopy (TEM) experiments revealed uniform droplet morphologies and a reduction of the average size of the dispersed phase upon addition of the compatibilizer. The results suggested...

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• Free-standing TiO2 nanotubes decorated with spherical nickel nanoparticles as a cost-efficient electrocatalyst for oxygen evolution reaction

  Publikacja

  • Ł. Haryński
  • K. Grochowska
  • J. Karczewski
  • J. Ryl
  • J. Rysz
  • S. Katarzyna

  - RSC Advances - Rok 2021

  Here, we report significant activity towards the oxygen evolution reaction (OER) of spherical nickel nanoparticles (NPs) electrodeposited onto free-standing TiO2 nanotubes (TNT) via cyclic voltammetry. It has been shown that simple manipulation of processing parameters, including scan rate and number of cycles, allows for formation of the NPs in various diameters and amounts. The polarization data with respect to transmission electron...

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• Copolymerization of Styrene and Pentadecylphenylmethacrylate (PDPMA): Synthesis, Characterization, Thermomechanical and Adhesion Properties

  Publikacja

  • T. Muringayil Joseph
  • S. Murali Nair
  • S. Kattimuttathu Ittara
  • J. T. Haponiuk
  • S. Thomas

  - Polymers - Rok 2020

  The copolymerization of styrene (St) with a bioderived monomer, pentadecylphenylmethacrylate (PDPMA), via atom transfer radical polymerization (ATRP) was studied in this work.The copolymerization reactivity ratio was calculated using the composition data obtained from1HNMR spectroscopy, applying Kelen-Tudos and Finemann-Ross methods. The reactivity ratio of styrene (r1=0.93) and PDPMA (r2=0.05) suggested random copolymerization...

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• Electron Scattering from Methyl Formate (HCOOCH3): A Joint Theoretical and Experimental Study

  Publikacja

  • N. Tańska
  • E. Bandeira
  • A. Souza Barbosa
  • K. Wójcik
  • S. Dylnicka
  • E. Ptasińska-Denga
  • C. Szmytkowski
  • M. H. F. Bettega
  • P. Możejko

  - JOURNAL OF PHYSICAL CHEMISTRY A - Rok 2023

  Elastic low-energy electron collisions with methyl formate have been studied theoretically at the level of various theories. The elastic integral cross section was calculated using Schwinger multichannel and R-matrix methods, in the static-exchange and static-exchange plus polarization levels of approximations for energies up to 15 eV. The absolute total cross section for electron scattering from methyl formate has been measured...

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• Cross-border transmission line configuration influence on the electrical power and energy billing process

  Publikacja

  • K. Dobrzyński
  • J. Klucznik
  • Z. Lubośny
  • M. Jaskólski
  • P. Bućko

  - Rok 2018

  In 2015 a connection between the Polish and Lithuanian power systems become fully operational. The connection consists of a 400 kV double circuit transmission line and a back-to-back HVDC substation located on the Lithuanian side. A magnetic couplings between the circuits of the transmission line cause that during power transmission a different values of active power losses are observed in both circuits. This situation may cause...

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• Efficiency Evaluation of High Performance Computing Systems Using Data Envelopment Analysis

  Publikacja

  • P. Kaczmarek

  - Rok 2014

  The paper presents an evaluation method of high performance computing (HPC) systems using multicriteria efficiency analysis. The Data Envelopment Analysis approach was applied and adapted to the specifics of HPC, which enabled us to compare relative efficiency of systems considering simultaneously multiple parameters. The analysis is based on the TOP500 list of world largest supercomputers and their parameters such as: the number...

• Surface roughness analysis of hardened steel after high‐speed milling

  Publikacja

  • P. Twardowski
  • S. Wojciechowski
  • M. Wieczorowski
  • T. Mathia

  - SCANNING - Rok 2011

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• Synchronized six-step voltage generation in high-speed PMSM drive

  Publikacja

  • L. Jarzębowicz
  • M. Cisek

  - Rok 2019

  Synchronized voltage generation has already been considered in the context of pulse width modulation (PWM). References prove that synchronized PWM substantially decreases subharmonics in inverter output voltage when operating with low switching-to-fundamental frequency ratio. This paper identifies problems of unsynchronized voltage generation in electric drives under six-step inverter operation. Guidelines for the synchronization...

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• High speed milling vibration surveillance using modal model of the tool

  Publikacja

  • K. J. Kaliński

  - Rok 2004

  Praca poświęcona jest nadzorowaniu drgań wirujących narzędzi w nowoczesnych frezarkach. Przedmiotem rozważań jest proces frezowania szybkościowego smukłym frezem kulistym na 5-osiowym centrum obróbkowym Deckel Maho DMU 50eVolution. Frezowanie smukłymi narzędziami jest często stosowane w przypadku nowoczesnych centrów obróbkowych. Uzasadnienie technologiczne wynika z konieczności dokładnego wykonywania złożonych kształtów geometrycznych...

• Mechatronic design for the high speed milling surveillance of the complex and flexible details

  Publikacja

  • K. J. Kaliński
  • M. Mazur

  - Rok 2011

  W pracy przedstawiono mechatroniczny system tworzenia mapy optymalnych prędkości obrotowych wrzeciona. W trakcie frezowania szybkościowego przedmiotów podatnych mogą wystąpić drgania samowzbudne typu chatter. Używana zazwyczaj procedura ustawiania wymaganej prędkości obrotowej wrzeciona metodą prób i błędów, w wielu przypadkach nie jest zalecana. Przedstawiona procedura nadzorowania może doprowadzić do uniknięcia ryzyka wystąpienia...

• REVERSE MODELLING OF MICROSEISMIC WAVES PROPAGATION FOR THE INTERPRETATION OF THE DATA FROM HYDRAULIC FRACTURING MONITORING IN POLAND

  Publikacja

  • M. Antoszkiewicz
  • M. Kmieć
  • M. Szkodo
  • R. Jankowski

  - Rok 2017

  A hydraulic fracturing job was performed to stimulate gas flow from a horizontal wellbore located in Poland. The whole operation was overseen by means of microseismic monitoring. For this purpose, an array of 12000 geophones was deployed on ground in form of patches distributed unevenly in a region of 4km from the wellbore. The array was constantly recording seismic signals during whole fracturing processed. Such recorded signals...

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• Graphene oxide, reduced graphene oxide and composite thin films NO2 sensing properties

  Publikacja

  • K. Dunst
  • B. Scheibe
  • G. Nowaczyk
  • S. Jurga
  • P. Jasiński

  - MEASUREMENT SCIENCE & TECHNOLOGY - Rok 2017

  A graphene oxide (GO), reduced graphene oxide (RGO) and poly(3,4-ethylenedioxytiophene)- reduced graphene oxide (PEDOT-RGO composite) gas sensors were successfully fabricated using an electrodeposition method. The electrodeposition was carried out in aqueous GO dispersions. In order to obtain RGO and PEDOT-RGO, the electrochemical reduction of GO and PEDOT-GO was carried out in 0.1 M KCl at constant potential of −0.85 V. The GO, RGO...

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• Combined Long-Period Fiber Grating and Microcavity In-Line Mach–Zehnder Interferometer for Refractive Index Measurements with Limited Cross-Sensitivity

  Publikacja

  • M. Janik
  • M. Koba
  • K. Król
  • P. Mikulic
  • W. J. Bock
  • M. Śmietana

  - SENSORS - Rok 2020

  This work discusses sensing properties of a long-period grating (LPG) and microcavity in-line Mach–Zehnder interferometer (µIMZI) when both are induced in the same single-mode optical fiber. LPGs were either etched or nanocoated with aluminum oxide (Al2O3) to increase its refractive index (RI) sensitivity up to ≈2000 and 9000 nm/RIU, respectively. The µIMZI was machined using a femtosecond laser as a cylindrical cavity (d = 60...

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• An NO2 sensor based on WO3 thin films for automotive applications in the microwave frequency range

  Publikacja

  • A. Paleczek
  • D. Grochala
  • K. Staszek
  • S. Gruszczyński
  • E. Maciak
  • Z. Opilski
  • P. Kałużyński
  • M. Wójcikowski
  • T. Cao
  • A. Rydosz

  - SENSORS AND ACTUATORS B-CHEMICAL - Rok 2023

  A microwave system dedicated to the detection of nitrogen dioxide in the harsh environment of the Norway highways is proposed. An optimized transmission line type of sensor coated with a tungsten trioxide thin film that changes its electrical properties under NO2 gas exposure is developed. The sensors' response (S) is given in °/GHz and it is calculated based on wideband measurements. The advantage of wideband measurements in comparison...

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