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Search results for: WSSUS MODELING

  • Modeling and simulation of tool cycle in manufacturing cell

    Publication

    The paper addresses issues concerning modeling and analysis of tool flow within a three-machine manufacturing cell used for small batch manufacturing of a definite spectrum of prismatic parts. The approach utilizes a method for job and tool allocation to work centers with limited number of machines and capacity of tool resources, based on the analysis of formalized relations: job - tool sets required. Selected tool flow control...

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  • Modeling of polarimetric sensors using LabVIEW environment

    Publication

    W artykule przedstawiono program do modelowania światłowodowych sensorów polarymetrycznych. Program ten, stworzony w środowisku LabVIEW, wyznacza odpowiedź nieidealnego światłowodowego sensora polarymetrycznego na siłę działającą na przetwornik pomiarowy. Omówiono problemy występujące w procesie tworzenia oprogramowania do modelowania zjawisk fizycznych w graficznym środowisku programistycznym. Przedstawiono wybrane wyniki modelowania.

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  • Modeling of photovoltaic properties of bilayer organic systems

    Publication

    Praca prezentuje teoretyczny opis charakterystyki prądowo-napięciowej i efektu fotowoltaicznego układu zbudowanego z dwóch warstw organicznych i elektrod. Rozpatrywane jest przybliżenie stałego pola elektrycznego oraz wpływ pułąpkowania nośników ładunku.

  • Modeling and Simulation Method of Precision Grinding Processes

    Publication
    • B. Bałasz
    • T. Królikowski

    - Year 2007

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  • Selected reflections on formal modeling in Industry 4.0

    Publication
    • M. Kostrzewski
    • N. Chamier-Gliszczyński
    • T. Królikowski

    - Procedia Computer Science - Year 2020

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  • Triangulation-based Constrained Surrogate Modeling of Antennas

    Publication

    Design of contemporary antenna structures is heavily based on full-wave electromagnetic (EM) simulation tools. They provide accuracy but are CPU-intensive. Reduction of EM-driven design procedure cost can be achieved by using fast replacement models (surrogates). Unfortunately, standard modeling techniques are unable to ensure sufficient predictive power for real-world antenna structures (multiple parameters, wide parameter ranges,...

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  • Fading Modeling in Maritime Container Terminal Environments

    Publication

    - IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY - Year 2018

    In this paper, an analytical model for slow and fast fading effects in maritime container terminals is derived, from fitting distributions to the results of measurements performed in an actual operational environment. The proposed model is composed of a set of equations, enabling to evaluate fading statistical distribution parameters for different system and environments conditions, as a function of frequency, base station antenna...

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  • Modeling and experimental investigation of the small UPQC systems

    Publication

    - Year 2005

    In this paper the basis of analytical modelling of the UPQC arrangements (Unified Power Quality Conditioner) in d-q rotating coordinates, as well as select results of investigations conducted on the simplified small power laboratory model were talked over. In short form power balance as well as fundamental dependences and analytic model with regard of decoupling circuits were investigated. Applied method for DC link capacity selection...

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  • FEM approach to modeling of an irregular trabecular structure

    Publication

    - Year 2018

    The aim of the study is elaboration of a method for creating irregular scaffolds that can be used to model the behaviour of trabecular bone placed in the proximal epiphysis of the femur. The scope of the study encompasses creating six numerical models of irregular scaffolds (two solid irregular scaffolds, two shell irregular scaffolds and two shell irregular scaffolds with fortification) and performing numerical analysis of the...

  • Half-Order Modeling of Saturated Synchronous Machine

    Publication

    - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS - Year 2014

    Noninteger order systems are used to model diffusion in conductive parts of electrical machines as they lead to more compact and knowledge models but also to improve their precision. In this paper a linear half-order impedance model of a ferromagnetic sheet deduced from the diffusion of magnetic field is briefly introduced. Then, from physical considerations and finite elements simulation, the nonlinear half-order impedance model...

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  • Modeling of Ice Phenomena in the Mouth of the Vistula River

    Publication

    The mouth of the Vistula River, which is a river outlet located in tideless area, is analyzed. The Vistula River mouth is a man-made, artificial channel which was built in the 19th century in order to prevent the formation of ice jams in the natural river delta. Since the artificial river outlet was constructed, no severe ice-related flood risk situations have ever occurred. However, periodic ice-related phenomena still have an impact...

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  • One-Dimensional Modeling of Flows in Open Channels

    Publication

    - Year 2015

    In this chapter, modeling of the unsteady open channel flow using one-dimensional approach is considered. As this question belongs to the well-known and standard problems of open channel hydraulic engineering, comprehensively presented and described in many books and publications, our attention is focused on some selected aspects only. As far as the numerical solution of the governing equations is considered, one can find out that...

  • Design-Oriented Constrained Modeling of Antenna Structures

    Publication

    - Year 2018

    Fast surrogate models are crucially important to reduce the cost of design process of antenna structures. Due to curse of dimensionality, standard (data-driven) modeling methods exhibit serious limitations concerning the number of independent geometry parameters that can be handled but also (and even more importantly) their parameter ranges. In this work, a design-oriented modeling framework is proposed in which the surrogate is...

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  • Reliability Modeling for SPMD and DAC Applications in MERPSYS

    Publication

    - Year 2016

    In this chapter we shall see a method for modeling of reliability of application execution in the MERPSYS system, and the results of reliability simulation of the same SPMD and DAC application which we have previously presented in this book. Unlike energy usage modeling and modeling of execution efficiency we could not compare the reliability model and simulation results to real experiment just because the experiment would last too...

  • Energy Consumption Modeling in SPMD and DAC Applications

    Publication

    - Year 2016

    In this chapter, we show a study of energy consumption during execution of SPMD and DAC application – the same applications which time of execution we modeled in the previous two chapters. We measured an average power usage at a single node of the GALERA+ cluster during application execution and then we modeled the total energy consumption by the application. Next we simulated the applications using MERPSYS and we compared the...

  • Visual Dimensions of Modeling Languages in Interdisciplinary Perspective

    Publication

    - Year 2013

    Użyteczność języków modelowania wizualnego zależy od notacji. Notacja może być postrzegana jako zestaw wizualnych komponentów, które w określony sposób oddziałują na ludzkie oko i ludzki mózg. Referat przedstawia analizę interdyscyplinarną wykonaną w celu lepszego zrozumienia wizualnych wymiarów języków modelowania. Wizualne wymiary pochodzą z teorii opisujących percepcję wzrokową, wizualizację danych oraz reprezentacje poznawcze....

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  • Thermal ablation modeling via bioheat equation

    Publication

    - Year 2013

    We consider Pennes’ bioheat equation and discuss an implicit numerical scheme which has better stability properties than other approaches. Our discussion concerns Carthesian geometry problems, however it carries over to spherical geometry models and more complicated shapes.

  • Technical Engine for Democratization of Modeling, Simulations, and Predictions

    Publication

    - Year 2012

    Computational science and engineering play a critical role in advancing both research and daily-life challenges across almost every discipline. As a society, we apply search engines, social media, and se- lected aspects of engineering to improve personal and professional growth. Recently, leveraging such aspects as behavioral model analysis, simulation, big data extraction, and human computation is gain- ing momentum. The nexus...

  • Quality Modeling in Grid and Volunteer-Computing Systems

    Publication

    - Year 2013

    A model of computational quality in large-scale computing systems was presented in the previous chapter of this book. This model describes three quality attributes: performance, reliability and energy efficiency. We assumed that all processes in the system are incessantly ready to perform calculations and that communication between the processes occurs immediately. These assumptions are not true for grid and volunteer computing...

  • Modeling of the internal combustion engine cooling system

    Publication

    The article concerns computer modelling of processes in cooling systems of internal combustion engines. Modelling objectives and existing commercial programs are presented. It also describes Author’s own method of binding graphs used to describe phenomena in the cooling system of a spark ignition engine. The own model has been verified by tests on the engine dynamometer. An example of using a commercial program for experimental...

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  • Semantic modeling of contextual augmented reality environments

    Publication
    • D. Rumiński

    - Year 2018

    Despite significant progress in the field of augmented reality (AR), regarding both hardware and software, there is still a lack of universal models and methods that would enable building ubiquitous AR systems that could be used anywhere and anytime, covering different application areas. This dissertation describes a new approach to building AR systems, called the Contextual Augmented Reality Environment (CARE). The CARE approach...

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  • Ionosphere variability II: Advances in theory and modeling

    Publication
    • I. Tsagouri
    • D. R. Themens
    • A. Belehaki
    • J. Shim
    • M. M. Hoque
    • G. Nykiel
    • C. Borries
    • A. Morozova
    • T. Barata
    • W. J. Miloch

    - ADVANCES IN SPACE RESEARCH - Year 2023

    This paper aims to provide an overview on recent advances in ionospheric modeling capabilities, with the emphasis in the efforts relevant to electron density variability. The discussion spans a wide range of model formulations (e.g., from purely empirical to physics-based ones and data-driven approaches) seeking for advances or gaps with regard to present challenges. This discussion is further supported by consideration of the...

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  • Modeling and simulation of thin-walled beams and frames

    Publication

    Przedstawiono koncepcję zastosowania superelementów węzłowych do modelowania połączeń słupów i rygli ram zbudowanych z prętów cienkościennych oraz stężeń konstrukcyjnych w belkach cienkościennych. Przeprowadzono analizę pracy ramy stalowej zbudowanej z prętów cienkościennych ze szczególnym uwzględnieniem problemu przekazywania bimomentu poprzez węzeł takiej ramy.

  • Numerical modeling of wave-seabed-structure interaction.

    Publication

    - Year 2004

    Praca doktorska przedstawia propozycję nowoczesnego rozwiązania obciążeń hydraulicznych przy uwzględnieniu nieliniowych oddziaływań pomiędzy falą wodną, przepuszczalnym dnem i porowatą konstrukcją morską. Nabrzeże pionowe, falochron podwodny i falochron kompozytowy były obiektem eksperymentów numerycznych, których wyniki były weryfikowane przy użyciu wyników laboratoryjnych (niszczących i nieniszczących). Krótki przegląd bieżącej...

  • Modeling of active fiber Bragg grating sensors

    Publication

    - Year 2005

    W artykule omówiono działanie przetwornika hydrofonu wykorzystującego profilowaną membranę sprzężoną z aktywną światłowodową siatką Bragga. W wyniku modelowania, wykonanego Metodą Elementów Skończonych, stwierdzono występowanie gradientów naprężeń wzdłuż siatki. Opracowano program do modelowania pasywnych i aktywnych światłowodowych siatek Bragga wykorzystujący metodę modów sprzężonych. Przedstawiono charakterystyki widmowe pasywnych...

  • Spatially variant PSF modeling in confocal macroscopy

    Publication

    - Year 2018

    The point spread function (PSF) of imaging systems plays an essential role in image reconstruction. In the context of confocal microscopy, optical performance degrades towards the edge of the field of view. In confocal macroscopy, the related artifacts are even stronger, as the field of view is much larger. Because the related PSFs are strongly spatially variant, it is essential to be able to model them with few parameters. The...

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  • Bounding approach to parameter estimation without prior knowledge on modeling error and application to quality modeling in drinking water distribution systems

    Publication

    W artykule rozważana jest estymacja parametrów modelu autoregresji z ruchoma średnią i sygnałem wejściowym (ARMAX) z wykorzystaniem przedziałowego modelu błędu. Zakłada się, że granice błędu struktury modelu są nieznane, bądź znane, ale bardzo konserwatywne. Dla zmniejszenia tego konserwatyzmu proponowane jest idea modeli punktowo-parametrycznych, w której występują zbiory parametrów i błędu modelu odpowiadające wszystkim wejściom....

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  • Method of Skeletal System Modelling

    An original method of skeletal system modelling is presented in detail. Using DICOM images obtained from CT and PET tests, shell models of nine bones were created (humerus, radius, ulna, scapula, clavicle, femur, tibia, fibula, pelvis). Two methods of bone behaviour are also proposed, the first method treating the bone as a solid structure and the second method treating the bone as a complex porous structure. The behaviour of model...

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  • Probability modelling of vessel collisions

    Publication

    - RELIABILITY ENGINEERING & SYSTEM SAFETY - Year 2010

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  • Modelling of the Svalbard fjord Hornsund

    Publication
    • J. Jakacki
    • A. Przyborska
    • S. Kosecki
    • A. Sundfjord
    • J. Albretsen

    - Oceanologia - Year 2017

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  • Numerical Modelling of Structures with Uncertainties

    Publication

    The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling...

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  • Modelling of foundations for supporting structures.

    Publication

    W pracy przedstawiono problemy współpracy fundamentów konstrukcji wsporczych z otaczającym ośrodkiem gruntowym w warunkach przestrzennego stanu odkształcenia. Przedstawiono możliwości analizy odporu granicznego podłoża i przemieszczeń fundamentów sztywnych obciążonych siłą poziomą lub momentem. Porównano modelowanie fizyczne zjawisk z modelowaniem matematycznym z wykorzystaniem symulacji numerycznych opartych na analizie płaskiego...

  • Descriptive Modelling of Virtual Transactions.

    Publication

    Artykuł prezentuje opisowy model transakcji detalicznych, w którym ich znaczenie (IOR) wyrażone przez strukturę sprzedaży i udział w rynku jest uwarunkowane funkcjonalnością (FUN), na którą wpływają w sposób zwrotny trzy grupy czynników : technologicznych, (TFG) ludzkich (HFG) oraz rynkowych (MFG).

  • Modelling of engineering materials with microstructure

    Publication

    - Year 2003

    Artykuł omawia różne modele do opisu lokalizacji odkształceń w postaci rys i stref ścinania w materiałach budowlanych takich jak grunt i beton. Zastosowane modele mechaniki ośrodka ciągłego i modele dyskretne.

  • A method for testing the wide-sense stationary uncorrelated scattering assumption fulfillment for an underwater acoustic channel

    Wide-sense stationary and uncorrelated scattering (WSSUS) assumptions are often applied for the statistical description of wireless communication channels. However, in the case of underwater acoustic channels the WSSUS model is of limited value. The degree of similarity of in-phase and quadrature components of the channel impulse response, measured with the use of bandpass modulated signals, can be used as an indicator of WSSUS...

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  • Modeling of strain localization in granular and quasi-brittle materials

    Publication

    - Year 2008

    W artykule przedstawiono wyniki symulacji lokalizacji odkształceń w materiałach granulowanych i kruchych. Zasosowano różne modele w ramach mechaniki ośrodków ciągłych i dyskretnych. Wyniki obliczeń porównano z doswiadczeniami.

  • Design and modeling of switched reluctance motor for scooter application

    Publication

    - Year 2019

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  • Modeling and Simulation of Electric Motors Using Lightweight Materials

    Publication
    • N. Boopathi
    • M. Muthuraman
    • R. Palka
    • M. Wardach
    • P. Prajzendanc
    • E. Gundabattini
    • R. Rassiah
    • D. Solomon

    - ENERGIES - Year 2022

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  • Modeling water exchange in the Oder River mouth area

    Publication

    - OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES - Year 2007

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  • EFFECTS OF BOUNDARY CONDITION EVALUATION ON DESIGN WAVE MODELING

    Publication

    - Year 2005

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  • Numerical modeling of hydrodynamics and sediment transport—an integrated approach

    Publication

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  • Modeling changes of the ionospheric potential due to lightning and sprites

    Publication

    - Year 2011

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  • Turbulence Flow Modeling of One-Sharp-Groyne Field

    Publication

    - Year 2018

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  • Numerical modeling of ice jam formation in the Włocławek reservoir

    Publication

    - TASK Quarterly - Year 2011

    Artykuł opisuje zjawisko powstawania zatoru lodowego w zbiorniku przepływowym przy użyciu dwuwymiarowego modelu DynaRICE. Analizowany proces został przeanalizowany na przykładzie zatoru lodowego, który utworzył się na zbiorniku Włocławek w syczniu 1982 roku. Przeprowadzone obliczenia pokazały, że zator utworzyła się z lodu powierzchniowego. Efekt termiczny i tworzenie się śryżu w zbiorniku został pominięty jako drugorzędny. Wyniki...

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  • Quantum chemical modeling of electrochromism of tungsten oxide films

    Publication
    • E. Broclawik
    • A. Góra
    • P. Liguzinski
    • P. Petelenz
    • H. Witek

    - JOURNAL OF CHEMICAL PHYSICS - Year 2006

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  • Modeling Online Buyers’ Preferences Related to Webpages Layout

    Publication
    • M. Kulinski
    • K. Jach
    • R. Michalski
    • J. Grobelny

    - Year 2010

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  • Software Modeling from the Perspective of Intuitive Information Processing

    Publication

    - Year 2014

    There is psychological evidence that humans process information not only consciously but also intuitively. Intuitive information processing is present also during the activities related to software modeling. The goal of this paper is to analyze software modeling from the perspective of theories which describe intuitive (nonconscious, implicit) information processing. The paper includes presentation of relevant psychological theories,...

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  • AAM toolkit: a system for visual object appearance modeling

    Publication

    - Year 2010

    Aktywne modele wyglądu (AAM) mogą być traktowane jako zaawansowana metoda analizy informacji multimedialnych, pozwalająca na lokalizowanie i rozpoznawanie obiektów w obrazach statycznych i sekwencjach wideo. Pomimo tego że ukazało się wiele publikacji dotyczących AAM, przejście od koncepcji teoretycznych do działającej implementacji stanowi nadal duże wyzwanie. W pracy przedstawiono przygotowany przez autorów pakiet oprogramowania...

  • Modeling organic nitrogen conversions in activated sludge bioreactors

    Publication

    - Year 2010

    Opracowano model przemian azotu organicznego (Norg)jako rozszerzenie Modelu Osadu Czynnego Nr 2d (ASM2d). Nowy model zawiera trzy frakcje Norg: rozpuszczoą, koloidalną i zawesinową. Każda frakcja została podzielona na dwie podfrakcje - rozkładalną i nierozkładalną. Model został zweryfikowany w oparciu o wyniki badań eksperymentalnych w oczyszczalni ścieków Gdańsk-Wschód.

  • Propagation Path Loss Modeling in Container Terminal Environment

    This paper describes novel method of path loss modeling for radio communication channels in container port area. Multi-variate empirical model is presented, based on multidimensional regression analysis of real path loss measurements from container terminal environment. The measurement instruments used in propagation studies in port area are also described.

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