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Search results for: CAPTIVE MODEL TESTS

  • Adaptive CAD-Model Construction Schemes

    Two advanced surrogate model construction techniques are discussed in this paper. The models employ radial basis function (RBF)interpolation scheme or artificial neural networks (ANN) with a new training algorithm. Adaptive sampling technique is applied withrespect to all variables. Histograms showing the quality of the models are presented. While the quality of RBF models is satisfactory, theperformance of the ANN models obtained...

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  • Diagnostic Model of Crankshaft Seals

    Publication

    T he paper presents a research stand being a diagnostic model of radial lip seals used, among others, on crankshafts of piston combustion engines in order to identify the correctness of their operation. The possibility of determining the technical condition of lip seals on the basis of the proposed coefficient of correctness of operation has been described. T he basic features of seals influencing their correctness of...

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  • Nieliniowy model matematyczny transformatora trójfazowego = Non-linear mathematical model of a three-phase transformer

    Publication

    - Year 2005

    Przedstawiono model transformatora trójfazowego o rdzeniu trójkolumnowym, który zawiera układ rów-nań opisujących obwód magnetyczny oraz oddzielnie układ równań obwodu elektrycznego. Wydzielenie re-luktancji elementów rdzenia umożliwia uwzględnienie zmian względnej przenikalności magnetycznej w funkcji bieżącej wartości strumienia w rdzeniu. Re-luktancje odpowiadające strumieniom rozproszenia obliczono wg zasad klasycznych. Funkcję...

  • Stałoprądowy model tranzystora typu HSD MAGFET

    Publication

    - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Year 2007

    Zaproponowano stałoprądowy model dwudrenowego tranzystora polowego typu HSD MAGFET, wykorzystywanego jako czujnik pola magnetycznego o dużej czułości na zmiany pola magnetycznego i dużej geometrycznej rozdzielczości pomiarowej. Zaprezentowany model odzwierciedla zjawisko podziału prądu płynącego w kanale tranzystora na prądy drenów i uwzględnia wzajemne oddziaływanie napięć drenów VDS1 i VDS2 na prady drenów ID1 i ID2 poprzez wprowadzenie...

  • Air flow phenomena in the model of the blind drift

    Publication

    - EPJ Web of Conferences - Year 2016

    In the presented paper, Particle Image Velocimetry (PIV) has been used to investigate flow pattern and turbulent structure in the model of blind drift. The presented model exist in mining, and has been analyzed to resolve ventilation issues. Blind region is particularly susceptible to unsafe methane accumulation. The measurement system allows us to evaluate all components of the velocity vector in channel cross-section simultaneously....

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  • A decentralised model of the regulating ancillary services market

    Publication

    - Acta Energetica - Year 2011

    The article presents a model of regulating ancillary services provision in a dencetralised manner. A concept of the operation of local markets for ancillary services is presented.

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  • Zdecentralizowany model rynku regulacyjnych usług systemowych

    Publication

    - Acta Energetica - Year 2011

    Zaprezentowano model pozyskania regulacyjnych usług systemowych w sposób zdecentralizowany. Przedstawiono koncepcję funkcjonowania lokalnych rynków usług regulacyjnych.

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  • Numerical Investigation on Dynamic Performance of a Multi-storey Steel Structure Model and Comparison with Experimental Results

    Publication

    Shaking table testing is the most commonly adopted method to simulate earthquake forces. This approach allows us to analyze the dynamic performance and provides a valuable insight into the dynamics of building structures, which helps to improve their future safety and reliability. The present study aims to conduct a numerical evaluation of dynamic response of a multi-storey steel structure model, which was previously examined during...

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  • Numerical investigation on dynamic performance of a multi-storey steel structure model and comparison with experimental results

    Publication

    Shaking table testing is the most commonly adopted method to simulate earthquake forces. This approach allows us to analyze the dynamic performance and provides a valuable insight into the dynamics of building structures, which helps to improve their future safety and reliability. The present study aims to conduct a numerical evaluation of dynamic response of a multi-storey steel structure model, which was previously examined during...

  • Conceptual fuzzy model of the polish internet mortgage market

    The aim of this paper is to present the conceptual structure of basic fuzzy model representing Polish Internet mortgage market. The paper starts with introduction describing the market complexities and challenges, and description of previously created rule based model. Then the steps of the process of proposed model fuzzyfication are presented. Final part of the paper consists of conclusions and directions for future research.

  • Model osobistej wirtualnej biblioteki cyfrowej

    Publication

    - Year 2005

    Szybki rozwój Internetu umożliwiający publikowanie i czytanie artykułów online w skali globalnej, uzasadnia tworzenie bibliotek cyfrowych jako repozytoriów wiedzy. Ich rozwój napotyka jednak na liczne bariery natury psychologicznej, organizacyjnej i technologicznej. W artykule przedstawimy propozycje ich przełamania z punktu widzenia doświadczeń Biblioteki Głównej Politechniki Gdańskiej. W szczególności skoncentrujemy się na modelu...

  • Badania połączeń spawanych rurociągu wody pitnej we Włocławku, ang. Welding joints tests in drinking water pipeline.

    Publication

    - Year 2022

    Celem badań opisanych w pracy było określenie przyczyn korozji powstałej w strefie wpływu ciepła (SWC) w obwodowych połączeniach spawanych w rurociągu wody pitnej. Materiałem, z którego wykonano rurociąg to stal 304/304L. W obszarze złącza spawanego stwierdzono wżery inicjowane od niezgodności geometrycznych, gdzie mogły gromadzić się osady zwiększające udział chlorków bezpośrednio przy powierzchni rury, promujące tym procesy korozyjne....

  • Nowy empiryczny model propagacjny RTK

    Publication

    - Year 2013

    W referacie opisano i przeanalizowano nowy model empiryczny do szacowania tłumienia propagacyjnego w ruchomych łączach radiowych pracujących w środowisku terminalu kontenerowego. Na wstępie opisane zostały badania pomiarowe przeprowadzone w celu uzyskania danych empirycznych pozwalających na opracowanie nowego modelu oraz scharakteryzowano badane środowisko. W głównej części referatu omówiono postać analityczną modelu oraz przedstawiono...

  • Model tworzenia wartości w logistyce

    Publication

    Ważnym zadaniem zarządzania logistycznego jest budowanie przewagi konkurencyjnej przedsiębiorstwa na bazie zdolności łańcucha dostaw (łańcucha logistycznego) do tworzenia wartości. Osiągnięcie oczekiwanego poziomu wzrostu wartości w procesach logistycznych wymaga połączenia wartości z użytecznością, szybkością działania i efektywnością kosztową. W pracy przedstawiono model procesu tworzenia wartości w działaniach logistycznych,...

  • Hybrid Reduced Model of Continuous System

    The paper introduces an alternative method of modelling and modal reduction of continuous systems. Presented method is a hybrid one. It combines the advantages of modal decomposition method and the rigid finite element method. In the proposed method continuous structure is divided into one-dimensional continuous elements. For each 1D element modal decomposition and reduction is applied. Interactions between substructures are...

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  • Multisource model of ship electric field

    A steel-hulled ship in sea water produces an electric field around itself. The source of this field are electrochemical processes and ship's cathodic protection. The analysis of the electric field around the ship is important by the reason of the ship's identification and counter-mine protection. The paper presents a simplified model of the ship's multisource electric field, which allows to calculate the electric field distribution...

  • Model rozmyty zarządzania przedsięwzięciami informatycznymi.

    Publication

    - Year 2004

    Przedstwiono budowę samonastrajalnego modelu rozmytego zarządzania przedsięwzięciami informatycznymi, który będzie wykorzystywany do wspomagania wytwarzania systemów opartych na wiedzy. Proponowany model bazuje on na rozwiązaniach opartych na wiedzy oraz teorii systemów dynamicznych i zbiorów rozmytych. W szczegółowej konstrukcji wykorzystano wiedzę dotyczącą zarządzania rzeczywistymi przedsięwzięciami informatycznymi (PATRIC i...

  • Information retrieval with semantic memory model

    Publication

    Psycholinguistic theories of semantic memory form the basis of understanding of natural language concepts. These theories are used here as an inspiration for implementing a computational model of semantic memory in the form of semantic network. Combining this network with a vector-based object-relation-feature value representation of concepts that includes also weights for confidence and support, allows for recognition of concepts...

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  • Three-dimensional conceptual model for service-oriented simulation

    Publication

    - Journal of Zhejiang University-SCIENCE A - Year 2009

    n this letter, we propose a novel three-dimensional conceptual model for an emerging service-oriented simulation paradigm. The model can be used as a guideline or an analytic means to find the potential and possible future directions of the current simulation frameworks. In particular, the model inspects the crossover between the disciplines of modeling and simulation, service-orientation, and software/systems engineering. Finally,...

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  • How to apply the probabilistic model of measurement processes successfully

    Publication

    - Year 2016

    Applicational aspects of probabilistic model of measurement processes, proposed by G.B. Rossi, are considered. The main idea of the model - using of Bayes-Laplace postulate for solution of inverse probability problem, is substituted by Fisher's concept of the likelihood function, expressed in the data translated format. This approach gives a clear-sighted solution of inverse probability. Some recommendations for application of...

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  • A Numerical Model Study on Ice Boom in a Coastal Lake

    Publication

    - JOURNAL OF COASTAL RESEARCH - Year 2013

    A numerical study on the effectiveness of the proposed ice boom to be installed near the entrance of Lake Notoro, Hokkaido, Japan to prevent sea ice moving into the lake is presented. A two-dimensional hydro–ice dynamics model was modified to allow for the treatment of ice-boom interaction with the effect of tidal current. The numerical model is a coupled hydrodynamic and ice dynamic model. The ice dynamic component uses a Lagrangian...

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  • Practical Use of Generic IT Organization Evolution Model

    In the paper we analyze, basing on the practical experiences, how the Generic IT Organization Model could be used to describe evolution of real-world IT support organization in relation to IT Service Management area.

  • Application of MARKAL model to optimisation of electricity generation structure in Poland in the long-term time horizon. Part II. Model and forecasts assumptions

    Publication

    In this paper, the next in a series of publications on the subject, assumptions are presented of a power system development model in terms of electricity generation technology infrastructure in Poland, in the long term perspective until 2060. The model is based on the mathematical structure of the MARKAL optimization package. Among other things developed are a forecast of the final demand for electricity and heat, the current...

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  • The use of a two-phase Monte Carlo material model to reflect the dispersion of asphalt concrete fracture parameters

    The work covers comprehensive laboratory tests of semi-circular bending (SCB) of asphalt concrete samples. The results of two test series, including four and 32 SCB specimens, indicate a substantial scatter of force–deflection (F-d) histories. The numerical analysis is aimed to reflect the maximum breaking load and fracture energy of the samples, pointing out their random character. The original simulation-based fictitious Monte...

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  • Model oceny dojrzałości przedsiębiorstw do zastosowania zwinnych metodyk zarządzania projektami IT

    Publication

    - Year 2024

    Dysertacja koncentruje się na budowie modelu, który ocenia gotowość przedsiębiorstw do wdrożenia zwinnych metodyk zarządzania projektami IT. Analizuje istniejące metody oceny dojrzałości projektowej i wprowadza własny model, biorąc pod uwagę krytyczne czynniki sukcesu i skuteczność zwinnych metod. Rozprawa zawiera badania literaturowe, empiryczne studium przypadku oraz weryfikację i rekomendacje modelu, dostarczając wglądu w praktyczne...

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  • Determination of Thermophysical Parameters Involved in The Numerical Model to Predict the Temperature Field of Cast-In-Place Concrete Bridge Deck

    Publication

    The paper dealswith a concept of a practical computationmethod to simulate the temperature distribution in an extradosed bridge deck. The main goal of the study is to develop a feasible model of hardening of concrete consistent with in-situ measurement capabilities. The presented investigations include laboratory tests of high performance concrete, measurements of temperature evolution in the bridge deck and above all, numerical...

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  • Development and validation of lumbar spine finite element model

    Publication

    The functional biomechanics of the lumbar spine have been better understood by finite element method (FEM) simulations. However, there are still areas where the behavior of soft tissues can be better modeled or described in a different way. The purpose of this research is to develop and validate a lumbar spine section intended for biomechanical research. A FE model of the 50th percentile adult male (AM) Total Human Model for Safety...

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  • A concept of heterogeneous numerical model of concrete for GPR simulations

    Publication

    - Year 2017

    The Ground Penetrating Radar (GPR) method, which is increasingly being used in the non-destructive diagnostics of reinforced concrete structures, often needs more accurate interpretation tools for analysis of experimental data. Recently, there has been growing interest in developing of various numerical models for exhaustive understanding of GPR data. This paper presents the concept of a heterogeneous numerical model of concrete,...

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  • THE 3D MODEL OF WATER SUPPLY NETWORK WITH APPLICATION OF THE ELEVATION DATA

    Publication

    - Year 2017

    3D visualization is a key element of research and analysis and as the source used by experts in various fields e.g.: experts from water and sewage systems. The aim of this study was to visualize in three-dimensional space model of water supply network with relief. The path of technological development of GESUT data (Geodezyjna Ewidencja Sieci Uzbrojenia Terenu – geodetic records of public utilities) for water supply and measurement...

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  • Dipolowy model pola elektrycznego okrętu

    Publication

    Okręt o kadłubie stalowym będący w wodzie morskiej wytwarza wokół siebie pole elektryczne. Źródłem tego pola są procesy elektrochemiczne i ochrona katodowa okrętu. Analiza pola elektrycznego wokół okrętu jest istotna z punktu widzenia identyfikacji oraz ochrony przeciwminowej. W pracy przedstawiono uproszczony model dipolowy pola magnetycznego okrętu, który pozwala na obliczenie rozkładu pola elektrycznego w tzw. strefie dalekiej...

  • Spike patterns and chaos in a map-based neuron model

    The work studies the well-known map-based model of neuronal dynamics introduced in 2007 by Courbage, Nekorkin and Vdovin, important due to various medical applications. We also review and extend some of the existing results concerning β-transformations and (expanding) Lorenz mappings. Then we apply them for deducing important properties of spike-trains generated by the CNV model and explain their implications for neuron behaviour....

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  • Bicycle Traffic Model for Sustainable Urban Mobility Planning

    Publication

    Modelling tools and transport models are required to assess the impact of measures for the effective planning of cycling routes in cities. This paper presents the methodology for developing a four-stage macroscopic model of bicycle traffic for the city of Gdynia, and its use in planning new bicycle routes, considering a modal shift. The model presented in this paper allows for the evaluation of the influence of the characteristics...

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  • Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests

    Publication

    The article presents the work of the stepless hybrid distribution transformer (HT), as an alternative to the so far applied Automatic Voltage Regulator (AVR) solutions, used to control the voltage in the power system in terms of the fundamental harmonic. The HT is a combination of a conventional distribution transformer and an AC/DC/AC converter connected in series with the transformers secondary winding. In the work the basic...

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  • Evaluating Pornography Problems Due to Moral Incongruence Model

    Publication

    - Journal of Sexual Medicine - Year 2020

    Introduction To date, multiple models of problematic pornography use have been proposed, but attempts to validate them have been scarce. Aim In our study, we aimed to evaluate the Pornography Problems due to Moral Incongruence model proposing that self-appraisals of pornography addiction stem from (i) general dysregulation, (ii) habits of use, and (iii) moral incongruence between internalized norms and behavior. We investigated...

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  • A hyperelastic model for soils with stress-induced and inherent anisotropy

    Publication

    In this paper, modelling of the superposition of stress-induced and inherent anisotropy of soil small strain stiffness is8presented in the framework of hyperelasticity. A simple hyperelastic model, capable of reproducing variable stress-induced9anisotropy of stiffness, is extended by replacement of the stress invariant with mixed stress–microstructure invariant to10introduce constant inherent cross-anisotropic component. A convenient...

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  • Model hybrydowy układu wielowirnikowego z przekładnią

    Publication

    - Year 2013

    W pracy przedstawiono metodę redukcji modelu układu wielowirnikowego z przekładnią, w którym uwzględniono zmienną prędkość kątową wirników, oddziaływania żyroskopowe, nieproporcjonalne tłumienie oraz nieliniowość podatności zazębienia. Zaproponowano hybrydową metodę modelowania, w której zastosowano: dekompozycję modalną oraz dyskretyzację przestrzenną. Zredukowany model modalny zbudowano dla części rozważanego układu, w której...

  • Towards a Universal Model of Engineering Change Management

    The paper deals with the issue of engineering change management (ECM). ECM has received much less attention in the literature than general change management. Moreover, due to their specifics (complexity and multifaceted nature), hitherto developed ECM models are difficult to implement in companies. The paper aims to develop a simplified, universal, and hence easily applicable model of ECM. We based our assumptions on a case study...

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  • Depolarisation Model for a BAN Indoor Scenario

    Publication
    • M. M. Ferreira
    • F. D. Cardoso
    • S. J. Ambroziak
    • M. Särestöniemi
    • K. Turbic
    • L. M. Correia

    - Year 2023

    In this paper, an analysis of depolarisation in Body Area Networks for Body-to-Infrastructure communications based on a measurement campaign in the 5.8 GHz band in an indoor environment is performed. Measurements were made with an offbody antenna transmitting linearly polarised signals and dualpolarised receiving antennas carried by the user on the body. A Normal Distribution with a mean of 2.0 dB and a standard deviation of 4.3...

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  • Periodic and chaotic dynamics in a map‐based neuron model

    Map-based neuron models are an important tool in modeling neural dynamics and sometimes can be considered as an alternative to usually computationally costlier models based on continuous or hybrid dynamical systems. However, due to their discrete nature, rigorous mathematical analysis might be challenging. We study a discrete model of neuronal dynamics introduced by Chialvo in 1995. In particular, we show that its reduced one-dimensional...

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  • CRVG - a new model for wireless networks topology generation

    Publication

    This paper presents a new model of wireless network topology generator. Its main advantage is the possibility of relatively sparse networks generation. Because no iteration is needed, the model can be used for massive generation of networks for testing. The topological properties of produced graphs place them in the class of scale free networks, resembling real ones.

  • Effect of bitumen characteristics obtained according to EN and Superpave specifications on asphalt mixture performance in low-temperature laboratory tests

    The paper aims to identify those characteristics of bitumen which have the greatest impact on asphalt mixture low-temperature performance. It was observed that stiffness and m-value of bitumen from BBR test were moderately related to stiffness and m-value of asphalt mixture obtained from 3 PB test. Simultaneously those rheological properties significantly impact on cryogenic stresses induced during TSRST test. The multiple regression...

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  • Poczucie samoskuteczności a nadmierne zaangażowanie w działaniach przedsiębiorców: Model teoretyczny

    Artykuł przedstawia model teoretyczny wyjaśniający wpływ poczucia samoskuteczności na eskalację zaangażowania wśród przedsiębiorców. Autorzy postulują, że rozbieżność pomiędzy poziomem przekonań dotyczących własnej skuteczności a faktyczną skutecznością tworzy lukę skuteczności. Początkujący przedsiębiorcy w związku z ich niewielkim doświadczniem są szczególnie narażeni na ryzyko eskalacji zaangażowania, gdyż cechują się ograniczonymi...

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  • ANALYSIS OF THE p53 PROTEIN GENE EXPRESSION MODEL

    Publication

    - Year 2015

    We study the asymptotic behaviour of the solutions of the p53-Mdm2 model proposed by Monk (2003). The p53 gene is crucial for cellular inhibition of the angiogenesis process, while Mdm2 is a negative regulator of the p53 tumor-suppressor. We investigate the stability of the positive steady state and perform some numerical experiments.

  • Supervised model predictive control of wastewater treatment plant

    Publication

    An optimizing control of a wastewater treatment plant (WWTP), allowing for cost savings over long time period and fulfilling effluent discharge limits at the same time, requires application of advanced control techniques. Model Predictive Control (MPC) is a very suitable control technology for a synthesis of such a truly multivariable controller that can handle constraints and accommodate model-based knowledge combined with hard...

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  • NUMERICAL MODEL OF PLASTIC DESTRUCTION OF THICK STEEL STRUCTURAL ELEMENTS

    Publication

    In the shipbuilding industry, the risk of brittle fracture of the structure is limited by using certified materials with specified impact strength, determined by the Charpy method (for a given design temperature) and by supervising the welding processes (technology qualification, production supervision, non-destructive testing). For off-shore constructions, classical shipbuilding requirements may not be sufficient. Therefore, the...

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  • Nieliniowy dynamiczny model instalacji katalitycznego odtleniania wody

    Instalacja katalitycznego odtleniania wody służy do redukcji stężenia tlenu rozpuszczonego w wodzie zasilającej obieg ciepłowniczy. W artykule opisano przykładową instalację tego rodzaju. Analiza procesów w niej zachodzących pozwoliła zaproponować metodykę budowy i strukturę modelu. Ze względu na różne skale czasowe dynamiki procesów zachodzących w instalacji i jej poszczególnych elementach, zaproponowano model w części statyczny,...

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  • Mathemathical model of radial passive magnetic bearing

    Publication

    - Polish Maritime Research - Year 2010

    In the article mathematical radial model of passive magnetic bearings to ocean engineering units has been presented. The units application in underwater thrusters should increase propulsion systems durability and gives lower maintenance costs. The rotor of electric motor is hanging in magnetic field taken from radial passive magnetic bearings. However axial direction maintenance must be controlled with electromagnets and their...

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  • Model finansowania samorządu terytorialnego w Polsce

    Celem artykułu jest określenie – na podstawie danych empirycznych – istniejącego w Polsce modelu finansowania samorządu terytorialnego. Przed jego identyfikacją scharakteryzowano od strony teoretycznej istniejące modele, nawiązując jednocześnie do jednego z podziałów systemu samorządu terytorialnego. Następnie opisano najważniejsze własności modelu zdecentralizowanego, mieszanego i scentralizowanego. W badaniach empirycznych posłużono...

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  • Analysis and Comparison of Safety of Children and Adult Passenger in Car Based on Crash Tests Results

    Publication
    • B. Zdunek
    • M. Landowski
    • S. Taryma
    • R. Woźniak
    • K. Imielińska
    • A. Muszyński

    - Key Engineering Materials - Year 2013

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  • Application a laboratory stand for multi-symptoms tests for high cyclic fatigue of constructional material

    Publication

    This paper describes a need of diagnostics present ship plants according to current technical state. In order to reach competent physical quantity describing fatigue of materials by congregated energy. This paper describes using some diagnostics methods (acoustic emission AE, vibration, thermovision, deformation) in order to definition fatigue state of construction material. The author tries to find correlation between measured...

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