Wyniki wyszukiwania dla: HYBRID METHOD OF MODELLING

• Hybrid analysis of microwave components in cylindrical coordinates with function expansion in subdomains.

  Publikacja

  • M. Wiktor
  • M. Mrozowski

  - Rok 2004

  W artykule zaproponowano wydajną metodę przyspieszenia analizy FDTD, poprzez podział dziedziny obliczeniowej i zastosowanie różnych algorytmów w różnych elementach dziedziny. Zaproponowano uniwersalną metodę łączenia techniki PEE (Partial Eigenfunction Expansion)i niezmodyfikowanej FDTD w jednej analizie. Uzyskano redukcję liczby zmiennych oraz wydłużenie kroku czasowego.

• Hierarchical dynamic hybrid models for aided design of ship power subsystems.

  Publikacja

  • R. Arendt

  - Rok 2004

  Rozważa się wielopoziomowe modele systemu energetycznego statku. Elementy systemu są modelowane z użyciem ciągłych zmiennych stanu i uwzględnieniem zerowego związku przyczynowo-skutkowego. Poziom pierwszy opisuje wzajemne związki modeli zerowego poziomu, poziom drugi reprezentuje powiązania modeli pierwszego poziomu itd. W ten sposób opisuje się modele elementów zespołów i podsystemów. Każdy z modeli może być hybrydowym modelem...

• Fabrication and properties of hybrid SiCp-Cf/Al composite for tribological applications

  Publikacja

  • K. Imielińska
  • Y. Le Petitcorps

  - Rok 2005

  Przedstawiono sposób otrzymywania i właściwości kompozytu o osnowie siluminu AlSi7Mg ze wzmocnieniem cząstkami SiC otrzymywanego przez infiltrację pod ciśnieniem preformy z ciągłych włókien węglowych. Otrzymano znaczne zwiększenie koncentracji SiC (do 45%) w stosunku do kompozytów Al/SiC odlewanych grawitacyjnie (ok 15-25%).

• Removal and retention of selected heavy metals in components of a hybrid wetland system

  Publikacja

  • H. Obarska-Pempkowiak

  - Rok 2003

  Prowadzone badania z określeniem możliwosci retencjonowania metali ciężkichw systemie hybrydowej oczyszczalni hydrofitowej. Wykazano, że znaczna rete- ncja tych pierwiastków następowała w wyniku sorpcji. Przeprowadzona ekstra- kcyjna analiza sekwencyjna wykazała, że Pb2+ i Cu2+ zostały zakumulowane w połączeniach trwałych i nie powinny ulegać wymywaniu z oczyszczalni. Nato- miast Cd2+ wskutek sorpcji we frakcjach labilnych może...

• Effect of contactless hybrid current limiter on voltage dips in power system

  Publikacja

  • P. Leśniewski
  • B. Semenowicz
  • R. Partyka

  - Rok 2003

  W referacie przedstawiono działanie hybrydowego niskonapięciowego ogranicznika prądu zwarciowego, składającego się z ultraszybkiego bezpiecznika, tranzystora mocy i warystora. W szczególności omówiono możliwości polepszenia jakości dostarczanej do odbiorców energii elektrycznej. Zastosowanie hybrydowego ogranicznika prądu znacznie ogranicza czasy trwania zapadów napięcia w systemie elektroenergetycznym. Obliczenia wykonano przy...

• Efficient analysis of waveguide componets using a hybrid PEE-FDFD algorithm.

  Publikacja

  • M. Wiktor
  • M. Mrozowski

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2003

  Zaproponowano przyspieszenie analizy podzespołów falowodowych poprzez połączenie metody różnic skończonych w dziedzinie częstotliwości FDFD oraz rozwinięcia w funkcje własne PEE. Proponowane sformułowanie pozwala jawnie zdefiniować operator macierzowy dla zadanego problemu. Proponowana technika została zaprezentowana zarówno dla problemów własnych jak i układów z pobudzeniem.

• Evolutionary - fuzzy hybrid system of steering the moveable object in dynamic environment

  Publikacja

  • A. Łebkowski
  • R. Smierzchalski

  - Rok 2003

  ...

• Computational Model of Time for Stiff Hybrid Systems Applied to Control Synthesis

  Publikacja

  • P. J. Mosterman
  • J. Zander
  • G. Hamon
  • B. Denckla

  - CONTROL ENGINEERING PRACTICE - Rok 2012

  Computational representation.

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• THE PULSE DESCRIPTORS IN SENSITIVITY STUDIES OF HYBRID SORPTION COLUMN TRANSPORT MODELS

  Publikacja

  • M. Okońska
  • M. Kaczmarek
  • M. Marciniak

  - JOURNAL OF POROUS MEDIA - Rok 2019

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• The influence of selected parameters of idd on vibrations of contact in ac hybrid breaker

  Publikacja

  • P. Jankowski
  • M. Wołoszyn

  - Rok 2006

  Wzrost mocy systemów zasilania na statkach wymaga poszukiwania nowych rozwiązań wyłączników dc oraz ac. Od kilku lat trwają prace nad modelowaniem ultra szybkiego hybrydowego wyłącznika prądu. Czas wyłączenia prądu wyłącznika zależy od wielu parametrów. W pracy przedstawiono wyniki badań eksperymentalnych i symulacyjnych wyłącznika ze szczególnym uwzględnieniem rezystancji zestyku.

• Solving Boundary Value Problems for Second Order Singularly Perturbed Delay Differential Equations by ε-Approximate Fixed-Point Method

  Publikacja

  • Z. Bartoszewski
  • A. Baranowska

  - Mathematical Modelling and Analysis - Rok 2015

  In this paper, the boundary value problem for second order singularly perturbed delay differential equation is reduced to a fixed-point problem v = Av with a properly chosen (generally nonlinear) operator A. The unknown fixed-point v is approximated by cubic spline vh defined by its values vi = vh(ti) at grid points ti, i = 0, 1, ... ,N. The necessary for construction the cubic spline and missing the first derivatives at the boundary...

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• THE SYNCHROSQUEEZING METHOD IN BEARING ESTIMATION OF STATIONARY SIGNALS FOR PASSIVE SONAR WITH TOWED ARRAY

  Publikacja

  • K. Czarnecki
  • W. Leśniak

  - HYDROACOUSTICS - Rok 2015

  In this paper, a novel method of bearing estimation in a passive sonar system with a towed array is introduced. The classical approach of bearing estimation based on the spatial spectrum [1] is extended by using the synchrosqeezing method that is a part of the reassignment method introduced by Kodera et al. [2]. Using this method leads to a precise bearing estimation. The proposed method requires a relatively small amount of computation,...

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• Preliminary designing method of external pressure vessels for sea subsurface aplications

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2010

  This paper describes a unique engineering method intended for the preliminary designing of marine subsurface buoy mooring systems. The solved designing problem consists in determining geometrical parameters and selecting structural materials for a vessel of a buoyancy necessary to contain measuring instruments of a given mass, as well as its maximum dimensions and operational submersion depth. The assumed variability range of...

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• A new method for measuring the psychoacoustical properties of tinnitus

  Publikacja

  • B. Kostek
  • T. Poremski

  - Diagnostic Pathology - Rok 2013

  information, select the tinnitus treatment and quantitatively substantiate its effects, the measurement of the Tinnitus psychoacoustic parameters should be made an inherent part of the Tinnitus therapy. Methods For this purpose the multimedia-based sound synthesizer has been proposed for testing tinnitus and the results obtained this way are compared with the outcome of the audiometer-based Wilcoxon test. The method has been verified...

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• Depth Determination Accuracy of the Modified Prony Method in a Swath Mapping Application

  Publikacja

  • P. Grall
  • J. Marszal

  - Rok 2018

  This article presents the performance of the modified Prony method in a swath mapping application. Depth determination accuracy is assessed by processing raw signal acquired by an EdgeTech 6205 swath bathymetry system over flat seafloor. An updated version of the method, proposed previously by the authors, is used to determine the number of signal echoes. The number of signal echoes is essential for performing the low-rank approximation...

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• Method of selecting the LS-SVM algorithm parameters in gas detection process

  Publikacja

  • Ł. Lentka
  • J. Smulko

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2015

  In this paper we showed the method of resistive gas sensors data processing. The UV irradiation and temperature modulation was applied to improve gas sensors’ selectivity and sensitivity. Noise voltage across the sensor’s terminals (proportional to its resistance fluctuations) was recorded to estimate power spectral density. This function was an input data vector for LS-SVM (least squares – support vector machine) algorithm, which...

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• Applications of the discrete green's function in the finite-difference time-domain method

  Publikacja

  • T. Stefański

  - Progress in Electromagnetics Research-PIER - Rok 2013

  In this paper, applications of the discrete Green's function (DGF) in the three-dimensional (3-D) finite-difference time-domain (FDTD) method are presented. The FDTD method on disjoint domains was developed employing DGF to couple the subdomains as well as to compute the electromagnetic field outside these subdomains. Hence, source and scatterer are simulated in separate subdomains and updating of vacuum cells, being of little...

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• Spectral Finite Element Method in Condition Monitoring and Damage Detection

  Publikacja

  • Ł. Doliński
  • M. Krawczuk
  • M. Palacz
  • A. Żak

  - Rok 2016

  It is well known that the dynamic behaviour of engineering structures may carry very important and crucial information that can be further used for the assessment of their condition as well as detection of any damage induced. The current interest in monitoring techniques based on the propagation of guided elastic waves requires that numerical techniques used for modelling the phenomena associated must shift into the realm of high...

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• The Double Cognitive Bias of Mistakes: A Measurement Method

  Publikacja

  • W. Kucharska
  • D. A. D. Bedford
  • A. Kopytko

  - Rok 2023

  There is no learning without mistakes. However, making mistakes among knowledge workers is s�ll seeing shameful. There is a clash between posi�ve a�tudes and beliefs regarding the power of gaining new (tacit) knowledge by ac�ng in new contexts and nega�ve a�tudes and beliefs toward accompanying mistakes that are sources of learning. These contradictory a�tudes create a bias that is doubled by the other shared solid belief...

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• A Simplified Method of Trend Removal to Determine Noise Observed During a Supercapacitor’s Discharging

  Publikacja

  • Ł. Lentka
  • J. Smulko

  - FLUCTUATION AND NOISE LETTERS - Rok 2019

  In this paper, new method of trend removal is proposed. This is a simplified method based on Empirical Mode Decomposition (EMD). The method was applied for voltage time series observed during supercapacitor discharging process. It assured the determination of an additive noise component after subtracting the identified trend component. We analyzed voltage time series observed between the terminals of the supercapacitor when discharged...

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• Visual method for detecting critical damage in railway contact strips

  Publikacja

  • S. Judek
  • J. Skibicki

  - MEASUREMENT SCIENCE & TECHNOLOGY - Rok 2018

  Ensuring an uninterrupted supply of power in the electric traction is vital for the safety of this important transport system. For this purpose, monitoring and diagnostics of the technical condition of the vehicle's power supply elements are becoming increasingly common. This paper presents a new visual method for detecting contact strip damage, based on measurement and analysis of the movement of the overhead contact line (OCL)...

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• Experimental verification of visual method for measuring displacements of contact line elements

  Publikacja

  • J. Skibicki

  - MATEC Web of Conferences - Rok 2018

  The increase of rail vehicles speed, as well as the increase of their power, puts high demands on the power delivery system for traction vehicles The most critical point in the vehicle's power supply circuit is the contact between the current collector and contact wires. Ensuring a reliable co-operation of the current collector and contact line, requires technical development...

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• Application of the numerical-analytic method for systems of differential equations with parameter

  Publikacja

  • T. Jankowski

  - Ukrainian Mathematical Journal - Rok 2002

  The numerical-analytic method is applied to systems of differential equations with parameter under the assumption that the corresponding functions satisfy the Lipschitz conditions in matrix notation. We also obtain several existence results for problems with deviations of an argument

• High frequency dynamics of an isotropic Timoshenko periodic beam by the use of the Time-domain Spectral Finite Element Method

  Publikacja

  • A. Żak
  • M. Krawczuk
  • M. Palacz
  • Ł. Doliński
  • W. Waszkowiak

  - JOURNAL OF SOUND AND VIBRATION - Rok 2017

  In this work results of numerical simulations and experimental measurements related to the high frequency dynamics of an aluminium Timoshenko periodic beam are presented. It was assumed by the authors that the source of beam structural periodicity comes from periodical alterations to its geometry due to the presence of appropriately arranged drill-holes. As a consequence of these alterations dynamic characteristics of the beam...

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• A method for the analysis of methylmercury and total Hg in fungal matrices

  Publikacja

  • M. Rutkowska
  • J. Falandysz
  • M. Saba
  • P. Szefer
  • M. Misztal-Szkudlińska
  • P. Konieczka

  - APPLIED MICROBIOLOGY AND BIOTECHNOLOGY - Rok 2022

  The aim of the study was to develop an efficient method for the determination of monomethyl-mercury (MeHg) and total mercury (THg) content in materials such as fungal sporocarps and sclerotia. Certified Reference Materials (CRMs) with the assigned values of MeHg and THg as well as the control materials (dried mushrooms) with known content of THg were evaluated for method validation. Recovery of MeHg from reference materials was...

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• Integrating modelling, simulation and data management tools to create a planning support system for the improvement of air quality by urban planning solutions

  Publikacja

  • J. Badach

  - Rok 2023

  The urbanization pressure requires urban planners, designers, and policy makers to be more responsive to the challenges related to improving the quality of the urban environment and the living conditions of the inhabitants. One of the many environmental issues that need to be taken into account is urban air pollution. As the process of urban ventilation and air pollution dis-persion is significantly affected by the urban layout,...

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• A New Geodetic Method of Examination of Geometrical Conditions of a Crane Bridge

  Publikacja

  • D. Filipiak-Kowszyk
  • W. Kamiński
  • K. Makowska-Jarosik

  - Geosciences - Rok 2019

  Safety is one of the key aspects related to crane-based material transport. In order to ensure safe crane operation and material transport, it is necessary to meet certain geometrical conditions. The authors addressed the geometrical conditions of a crane bridge, a substantial crane component. The paper presents the method to compute displacement components of points on the top of a bridge crane relative to their design position....

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• Performance Evaluation of GAM in Off-Body Path Loss Modelling for Body Area Networks

  Publikacja

  • M. Laskowski
  • S. J. Ambroziak
  • L. M. Correia
  • K. Świder

  - Rok 2021

  This paper addresses the performance evaluation of an off-body path loss model, based on measurements at 2.45 GHz, which has been developed with the use of the Generalised Additive Model, allowing to model a non-linear dependence on different predictor variables. The model formulates path loss as a function of distance, antennas’ heights, antenna orientation angle and polarisation, results showing that performance is very sensitive...

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• A method for counting people attending large public events

  Publikacja

  • K. Kopaczewski
  • M. Szczodrak
  • A. Czyżewski
  • H. Krawczyk

  - MULTIMEDIA TOOLS AND APPLICATIONS - Rok 2015

  The algorithm for people counting in crowded scenes, based on the idea of virtual gate which uses optical flow method is presented. The concept and practical application of the developed algorithm under real conditions is depicted. The aim of the work is to estimate the number of people passing through entrances of a large sport hall. The most challenging problem was the unpredicted behavior of people while entering the building....

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• Peer assessment as a method for measuring harmful internet use

  Publikacja

  • W. W. Koczkodaj
  • A. Kowalczyk
  • M. Mazurek
  • W. Pedrycz
  • G. Redlarski
  • E. Rogalska
  • D. Strzałka
  • A. Szymańska
  • A. Wilinski
  • S. Xue

  - MethodsX - Rok 2023

  Harmful Internet use (HIU) describes unintended use of the Internet. It could be both self-harm and harming others. Our research goal is to develop a more accurate method for measuring HIU by this novel peer assessment. As such, it may become, with our call for more research, a paradigm shift supplementing every rating scale or other type of Internet use assessment. In addition to classic statistical analysis, structural equations...

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• Comparison of Selection Schemes in Evolutionary Method of Path Planning

  Publikacja

  • P. Kolendo
  • B. Jaworski
  • R. Śmierzchalski

  - LECTURE NOTES IN COMPUTER SCIENCE - Rok 2011

  This article compares an impact of using various selection schemes on the quality of the solution for the problem of planning the path for a moving object using the evolutionary method. In study case problem of avoiding collisions at sea is analyzed. The modelled environment includes static constraints (lands, canals, etc.) and dynamic objects (moving ships). Article analyses behaviour of selection schemes in two similar environments...

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• Designing a ship course controller by applying the adaptivebackstepping method

  Publikacja

  • A. Witkowska
  • R. Śmierzchalski

  - International Journal of Applied Mathematics and Computer Science - Rok 2012

  The article discusses the problem of designing a proper and efficient adaptive course-keeping control system for a seagoingship based on the adaptive backstepping method. The proposed controller in the design stage takes into account thedynamic properties of the steering gear and the full nonlinear static maneuvering characteristic. The adjustable parametersof the achieved nonlinear control structure were tuned up by using the...

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• Numerical Method for Stability Testing of Fractional Exponential Delay Systems

  Publikacja

  • T. Stefański
  • S. Dziedziewicz
  • P. Kowalczyk
  • J. Gulgowski

  - Rok 2024

  A numerical method for stability testing of fractional exponential systems including delays is presented in this contribution. We propose the numerical test of stability for a very general class of systems with a transfer function, which includes polynomials and exponentials of fractional powers of the Laplace variable s combined with delay terms. Such a system is unstable if any root of its characteristic equation, which usually...

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• OPTIMALIZATION OF SORBENT FEEDING IN THE DRY METHOD OF FLUE GAS DESULFURIZATION

  Publikacja

  • P. Kwiatkowski
  • R. Zadrąg

  - Journal of Polish CIMEEAC - Rok 2017

  The swiftly developing sea transport contributes to a considerable increase of fuel usage in the international shipping, which results in the escalation of toxic compounds emitted into the atmosphere. It is followed by the constantly heightened requirements limiting those emissions. In the case of sulfur oxide emission, inside of SECA (Sulfur Emission Control Area), the maximum content of sulfur in the shipping fuels used on the...

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• "Shadow" method application within endoscopic examinations of marine engines

  Publikacja

  • Z. Korczewski
  • J. Rudnicki

  - Rok 2012

  The paper deals with diagnostic issues concerning endoscopic examinations of the working spaces within marine diesel and gas turbine engines. In the beginning, the endoscopy apparatus being on the laboratory equipment of the Department of Ship Power Plants of Gdansk University of Technology in Poland has been characterized. The endoscopy considerations have been focused on theoretical bases of a digital image processing and especially...

• "Shadow" method application within endoscopic examinations of marine engines

  Publikacja

  • Z. Korczewski
  • J. Rudnicki

  - Rok 2012

  The paper deals with diagnostic issues concerning endoscopic examinations of the working spaces within marine diesel and gas turbine engines. In the beginning, the endoscopy apparatus being on the laboratory equipment of the Department of Ship Power Plants of Gdansk University of Technology in Poland has been characterized. The endoscopy considerations have been focused on theoretical bases of a digital image processing and especially...

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• Nonlocal Vibration of Carbon/Boron-Nitride Nano-hetero-structure in Thermal and Magnetic Fields by means of Nonlinear Finite Element Method

  Publikacja

  • H. M. Sedighi
  • M. Malikan
  • A. Valipour
  • K. Kamil Żur

  - Journal of Machinery Manufacture and Reliability - Rok 2020

  Hybrid nanotubes composed of carbon and boron-nitride nanotubes have manifested as innovative building blocks to exploit the exceptional features of both structures simultaneously. On the other hand, by mixing with other types of materials, the fabrication of relatively large nanotubes would be feasible in the case of macroscale applications. In the current article, a nonlinear finite element formulation is employed to deal with...

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• DETERMINATION OF SEAKEEPING PERFORMANCE FOR A CASE STUDY VESSEL BY THE STRIP THEORY METHOD

  Publikacja

  • K. Niklas
  • A. Karczewski

  - Polish Maritime Research - Rok 2020

  The increase of seakeeping performance is of particular importance for car and passenger ferries, service ships in the gas and oil extraction industry and offshore wind power farm industry, as well as for special purpose ships (including military applications). In the water areas of the Baltic Sea, North Sea, and Mediterranean Sea, which are characterised by a short and steep wave, the hull shape has a substantial impact on the...

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• Monitoring of underdeck corrosion by using acoustic emission method

  Publikacja

  • K. Emilianowicz

  - Polish Maritime Research - Rok 2014

  This paper presents first short characteristics of underdeck corrosion process as well as a problem of its monitoring. Next is described an acoustic emission (AE) method elaborated by Department of Ship Technology , Quality Systems and Material Engineering, Gdańsk University of Technology in cooperation with partners of CORFAT project realized within 7th EU Frame Program . Further are presented short characteristics of the emission...

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• A novel method of time-frequency analysis: an essential spectrogram

  Publikacja

  • K. Czarnecki

  - HYDROACOUSTICS - Rok 2013

  A novel precise method of time-frequency analysis is presented. In the algorithm, a new energy distribution is estimated by simultaneously discard or displacement of the classical spec- trogram energy. A channelized instantaneous frequency and a local group delay are used in order to replacement in the same manner as formulated by Kodera et al. [1, 2]. Additionally, new representations: a channelized instantaneous bandwidth and...

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• Estimation of Selected Synchronous Generator Parameters Based on the Gradient Method

  Publikacja

  • Z. Lubośny
  • J. Klucznik
  • K. Dobrzyński

  - Acta Energetica - Rok 2014

  The authors present a method for the estimation of synchronous generator model parameters using a gradient algorithm. The paper shows an example of model parameter estimation for a turbogenerator and hydrogenerator, based on the generator voltage time responses obtained during an active and reactive power rejection test.

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• Reliability assessment of truss towers using Monte Carlo Method, PEM and RSM

  Publikacja

  • K. Winkelmann
  • M. Oziębło

  - Rok 2015

  The paper discusses the reliability assessment of simple random truss structures using three different probabilistic methodologies: the Monte Carlo method, the Point Estimate Method and the Response Surface Method. A benchmark truss structure example is analyzed. A set of numerical calculations of critical load is performed and the results are taken as the basis of advanced probabilistic calculations. Using the samples, numerical...

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• Application of the corrosion tester in corrosion tests using the acoustic emission method.

  Publikacja

  • K. Emilianowicz
  • M. Supernak
  • A. Ossowska

  - Polish Maritime Research - Rok 2022

  The article presents an innovative method of corrosion tests using the acoustic emission method and the corrosion tester. The problem of corrosion occurring in ballast tanks and tanks carrying petroleum products is discussed. The acoustic method is presented which, due to the use of a unique corrosion tester, is used to monitor the course of corrosion processes in steel. The principle of operation of the corrosion tester, its construction...

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• Verification of the new viscoelastic method of thermal stress calculation in asphalt layers of pavements

  Publikacja

  • J. Judycki

  - International Journal of Pavement Engineering - Rok 2018

  The new viscoelastic method of thermal stress calculations in asphalt layers has been developed and published recently by the author. This paper presents verification of this method. The verification is based on the comparison of the results of calculations with results of testing of thermal stresses in Thermal Stress Restrained Specimen Test. The calculations of thermal stresses according to the new method were based on rheological...

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• Energy Management for PV Powered Hybrid Storage System in Electric Vehicles Using Artificial Neural Network and Aquila Optimizer Algorithm

  Publikacja

  • N. Narasimhulu
  • R. S. R. Krishnam Naidu
  • P. Falkowski-Gilski
  • P. B. Divakarachari
  • U. Roy

  - ENERGIES - Rok 2022

  In an electric vehicle (EV), using more than one energy source often provides a safe ride without concerns about range. EVs are powered by photovoltaic (PV), battery, and ultracapacitor (UC) systems. The overall results of this arrangement are an increase in travel distance; a reduction in battery size; improved reaction, especially under overload; and an extension of battery life. Improved results allow the energy to be used efficiently,...

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• A Method of Assessment of the Liquid Sloshing Impact on Ship Transverse Stability

  Publikacja

  • P. Krata

  - TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation - Rok 2014

  Liquid sloshing phenomenon taking place in partly filled ships? tanks directly affects the stability of a vessel. However, only static calculations are carried out onboard ships nowadays and static transfer of liquid weight is taken into account in the course of routine stability calculation. The paper is focused on a dynamic heeling moment due to liquid sloshing in tanks onboard ships. The set of numerical simulations of liquid...

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• The influence of thermal conditions on V2O5 nanostructures prepared by sol-gel method

  Publikacja

  • M. Prześniak-Welenc
  • M. S. Łapiński
  • T. Lewandowski
  • B. Kościelska
  • L. Wicikowski
  • W. Sadowski

  - Journal of Nanomaterials - Rok 2015

  This work presents the result of structure investigations ofV 2O5 nanorods grown from thin films and powders prepared by sol-gel method. To examine the best temperature of nanorods crystallization, thin films deposited by spin-coating method on quartz glass or silicon substrates and bulk xerogel powders were annealed at various temperatures ranging from 100∘C to 600∘C. The structure of the samples was characterized by X-ray diffraction...

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• Analytical design method for widening the intertrack space

  Publikacja

  • W. Koc

  - Current Journal of Applied Science and Technology (British Journal of Applied Science & Technology) - Rok 2019

  The paper involved the issue of arching of the railway turnouts. This is an issue which is given relatively less attention to scientific and research activities. Reference has been made to the book by Wladyslaw Rzepka, under the title „Curved turnouts in plan and profile”, which has been used in Poland for more than 50 years as the main source of information relating to the turnouts on the curve. The book is a compilation of elaborations...

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• Arching of railway turnouts by analytical design method

  Publikacja

  • W. Koc

  - Current Journal of Applied Science and Technology (British Journal of Applied Science & Technology) - Rok 2017

  The paper involved the issue of arching of the railway turnouts. This is an issue which is given relatively less attention to scientific and research activities. Reference has been made to the book by Wladyslaw Rzepka, under the title „Curved turnouts in plan and profile”, which has been used in Poland for more than 50 years as the main source of information relating to the turnouts on the curve. The book is a compilation of elaborations...

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• A method of the UMTS-FDD network design based on universal load characteristics

  Publikacja

  • S. Gajewski

  - Rok 2009

  In the paper an original method of the UMTS radio network design was presented. The method is based on simple way of capacity-coverage trade-off estimation for WCDMA/FDD radio interface. This trade-off is estimated by using universal load characteristics and normalized coverage characteristics. The characteristics are useful for any propagation environment as well as for any service performance requirements. The practical applications...