Search results for: process modeling - Bridge of Knowledge

Search

Search results for: process modeling

Search results for: process modeling

  • 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

    Full text to download in external service

  • Modeling Online Buyers’ Preferences Related to Webpages Layout

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

    - Year 2010

    Full text to download in external service

  • Numerical modeling in open channel hydraulics / R. Szymkiewicz

    Publication
    • M. Naczk

    - Year 2010

    książka poświęcona jest zagadnieniom modelowania matematycznego przepływów w kanałach otwartych.oprócz wyprowadzenia podstawowych równań przepływów oraz transportu masy i energii, w książce omówiono metody numeryczne użyteczne w hydraulice kanałów.przedstawiono liczne przykłady ich aplikacji do rozwiązania równań przepływu ustalonego i nieustalonego. opisowi metod rozwiązania towarzyszą analizy dokładności oraz stabilności numerycznej.

  • 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 lubricant flow between thrust-bearing pads

    Publication

    Inlet temperature is one of the main inputs in all models for the analysis of fluid film bearing performance. At the same time, inlettemperature distribution and also oil velocity distribution at the inlet are the result of flow phenomena in the gap between the bearingpads. These phenomena are complex and in many cases further affected by any special arrangements of forced oil supply to the gapbetween pads. The reason for such...

    Full text available to download

  • Modeling for Detection of Degraded Zones in Metallic and Composite Structures

    Publication

    - Year 2008

    W pracy przedstawiono przegląd metod modelowania uszkodzeń w postaci pęknięć i delaminacji wystepujących w elementach konstrukcyjnych

  • 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.

    Full text available to download

  • Modeling of the acoustic waves propagation in non-homogeneous medium

    Publication

    Rozważano zagadnienie propagacji fal w ośrodku niejednorodnym. Przedstawiono model matematyczny i przykładowe wyniki badań numerycznych. Model matematyczny zbudowano w oparciu o równanie KZK. Do rozwiązania zagadnienia zastosowano metodę różnic skończonych. Badano zmiany ciśnienia i zmiany widma odpowiednio w ośrodku jednorodnym i niejednorodnym.

    Full text available to download

  • <title>Control system modeling for superconducting accelerator</title>

    Publication

    - Year 2006

    Full text to download in external service

  • Design and modeling of switched reluctance motor for scooter application

    Publication

    - Year 2019

    Full text to download in external service

  • 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.

  • 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

    Full text to download in external service

  • Physics-Based Coarse-Grained Modeling in Bio- and Nanochemistry

    Publication
    • A. Liwo
    • A. K. Sieradzan
    • A. S. Karczyńska
    • E. Lubecka
    • S. A. Samsonov
    • C. Czaplewski
    • P. Krupa
    • M. Mozolewska

    - Year 2021

    Coarse-grained approaches, in which groups of atoms are represented by single interaction sites, are very important in biological and materials sciences because they enable us to cover the size- and time-scales by several orders of magnitude larger than those available all-atom simulations, while largely keeping the details of the systems studied. The coarse-grained approaches differ by the scheme of reduction and by the origin...

    Full text to download in external service

  • Knowledge-based performance-driven modeling of antenna structures

    The importance of surrogate modeling techniques in the design of modern antenna systems has been continuously growing over the recent years. This phenomenon is a matter of practical necessity rather than simply a fashion. On the one hand, antenna design procedures rely on full-wave electromagnetic (EM) simulation tools. On the other hand, the computational costs incurred by repetitive EM analyses involved in solving common tasks...

    Full text available to download

  • 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...

    Full text available to download

  • Numerical modeling of the nonlinear wave propagation in a bubble layer

    Publication

    Rozważano zagadnienie propagacji fali wewnątrz warstwy z pęcherzykami. Omówiono model matematyczny, przedstawiono przykładowe wyniki badań teoretycznych. Analizowano zmiany ciśnienia wewnątrz warstwy, falę odbitą i bieżącą w ośrodku otaczającym, badano gęstość widmową mocy. Badania teoretyczne przeprowadzono dla różnych grubości warstwy, koncentracji pęcherzyków i wartości parametrów fali padającej.

    Full text available to download

  • Recent Developments in Data-Assisted Modeling of Flexible Proteins

    Publication
    • C. Czaplewski
    • Z. Gong
    • E. Lubecka
    • K. Xue
    • C. Tang
    • A. Liwo

    - Frontiers in Molecular Biosciences - Year 2021

    Many proteins can fold into well-defined conformations. However, intrinsically-disordered proteins (IDPs) do not possess a defined structure. Moreover, folded multi-domain proteins often digress into alternative conformations. Collectively, the conformational dynamics enables these proteins to fulfill specific functions. Thus, most experimental observables are averaged over the conformations that constitute an ensemble. In this...

    Full text available to download

  • Modeling variable curvature on the turnout diverging track length

    Publication

    The paper presents three variants of variable curvature application on the entire length of the turnout diverging track. One linear and two nonlinear curvature cases: described the function of C1 and C0 class were considered. It turned out that both linear curve and the function of C1 class requires a significant (even twice) length of diverging track extending with respect to the base turnout. The curvature described by the function...

    Full text available to download

  • Performance-Driven Surrogate Modeling of High-Frequency Structures

    Publication

    The development of modern high-frequency structures, including microwave and antenna components, heavily relies on full-wave electromagnetic (EM) simulation models. Notwithstanding, EM-driven design entails considerable computational expenses. This is especially troublesome when solving tasks that require massive EM analyzes, parametric optimization and uncertainty quantification be-ing representative examples. The employment of...

    Full text to download in external service

  • Modeling BIM Objects From Point Clouds. Examples

    The article presents several ways to obtain BIM (Building Information Modeling) models from point clouds using standard commands in Revit 2018. In Revit geometric forms are possible to obtain in project, family or conceptual environments. Efficient modeling requires knowledge of methods of creating families and components in these environments and ways to combine them. Modeling methods with system and loadable families are presented,...

    Full text available to download

  • Transient modeling in common DC link of power converters

    Publication

    - Science, Technology and Arts Research Journal - Year 2020

    Предмет исследования. Представлена математическая модель силовых преобразователей электропривода, питающихся от общего звена постоянного тока, на примере тяговых электроприводов карьерного самосвала БЕЛАЗ-90 мощностью 280 кВт. Модель выполнена в пакете MATLAB/Simulink. Новизна предложенной модели заключается в применении новой топологии силовой схемы для исследования работы двух инверторов, под- ключенных к одному звену постоянного...

    Full text available to download

  • Artificial Neural Networks in Microwave Components and Circuits Modeling

    Artykuł dotyczy wykorzystania sztucznych sieci neuronowych (SNN) w projektowaniu i optymalizacji układów mikrofalowych.Zaprezentowano podstawowe zasady i założenia modelowania z użyciem SNN. Możliwości opisywanej metody opisano wykorzystując przykładowyprojekt anteny łatowej. Przedstawiono różne strategie modelowania układów, które wykorzystują możliwości opisywanej metody w połączeniu zwiedzą mikrofalową. Porównano również dokładność...

    Full text available to download

  • Modeling of entrained flow steam gasification of sewage sludge

    Publication
    • J. Mularski
    • K. Stasiak
    • M. Ostrycharczyk
    • M. Czerep
    • M. Wnukowski
    • K. Krochmalny
    • M. Baranowski
    • P. Ziółkowski
    • M. Kowal
    • Ł. Niedźwiecki... and 2 others

    - Year 2023

    Proper management of sewage sludge becomes increasingly problematic due to legal requirements aiming at diminishing environmental impact, as well as rationalizing the utilization from the point of view of logistics. Steam gasification of sewage sludge can result in very good quality of the producer gas. So far, the works have been focused on the gasification in fixed bed gasifiers. However, this does not allow to take full advantage...

    Full text available to download

  • Performance‐driven modeling of compact couplers in restricted domains

    Fast surrogate models can play an important role in reducing the cost of EM-driven design closure of miniaturized microwave components. Unfortunately, construction of such models is challenging due to curse of dimensionality and wide range of geometry parameters that need to be included in order to make it practically useful. In this letter, a novel approach to design-oriented modeling of compact couplers is presented. Our method...

    Full text to download in external service

  • Modeling of performance of an AUV stealth vehicle. Design for operation.

    Publication

    - Year 2017

    In the paper some results of research connected with modelling of performance and risk assessment of an AUV stealth vehicle are presented. A general approach to design of the stealth AUV autonomous underwater vehicle under consideration is introduced. The basic stealth characteristics of the AUV stealth vehicle are briefly described. The method of research is introduced. The AUV stealth vehicle concept is presented including the...

    Full text to download in external service

  • Modeling of Combined Phenomena Affecting an AUV Stealth Vehicle

    In the paper some results of research connected with modelling the basic stealth characteristics of an AUV vehicle are presented. First of all a general approach to design of the stealth AUV autonomous underwater vehicle under consideration is introduced. Then, the AUV stealth vehicle concept is briefly described. Next a method of modelling of the stealth characteristics is briefly described as well. As an example of the stealth...

    Full text available to download

  • Energy Modeling of Single-Family Houses in the Conceptual Phase

    Publication

    - Year 2018

    The aim of the article is to identify the potential impact of the latest commercial digital tools for building energy analysis on the everyday architectural practice in Poland in the context of typology and energy optimization of single –family houses. The reason for this survey is that “architect friendly” interfaces simulation results’ visualization and energy analysis tools are not given deserved attention in the architectural...

  • Modeling the application of steel slag in stabilizing expansive soil

    Publication

    The objective of this study was to evaluate the suitability of steel slag as an additive to the engineering properties of weak clay soil. Different geotechnical laboratory tests were conducted on both stabilized and natural soils. Steel slag (SS) was added at a rate of 0, 5, 10, 15, 20, and 25% to the soil. Specific gravity, grain size analysis, Atterberg limit test, compaction test, free swell, California bearing ratio (CBR),...

    Full text available to download

  • Modeling of flow phenomena associated with polymer injection into a mold

    Publication

    Podczas wtrysku tworzywa do formy w strefie tworzywo-ścianka formy występują zjawiska, które są źródłem zwiększonej chropowatości powierzchni i wad wypraski. W pracy pisano powyższe zjawiska oraz zaprezentowano model numeryczny, umożliwiający symulację tych zjawisk. Symulację komputerową wykonano w CI TASK stosując program FIDAP. Wyniki badań symulacyjnych zweryfikowano badaniami doświadczalnymi, wykonując fotografie i profilogramy...

    Full text available to download

  • Modeling of unsaturated water flow in highly heterogeneous soils.

    Publication

    - Year 2004

    Tematem pracy jest modelowanie przepływu wody w gruntach nienasyconych o podwójnej porowatości, które charakteryzują się obecnością dwóch podobszarów porowatych o skontrastowanych parametrach hydraulicznych. Jako punkt wyjścia przyjęto, że w skali lokalnej przepływ w obu podobszarach jest opisany równaniem Richardsa. Przedstawiono wyprowadzenie dwóch modeli przepływu w skali makroskopowej przy użyciu metody homogenizacji asymptotycznej....

  • Modeling of cut layer's thickness for circular saw blade

    Publication
    • T. Walkowiak

    - Year 2005

    W pracy omówiono sposób modelowania grubości warstwy skrawanej na podstawie wyprowadzonych zależności matematycznych.

  • Modeling of substrate noise block properties for early rediction.

    Publication

    - Year 2005

    Zaproponowano nowe podejscie do modelowania zakłóceń podłozowych we wczesnym etapie projektowania systemów na wspólnym podłożu krzemowym. Modelowanie zakłóceń oparto na założeniu, że głównym źródłem zakłóceń podłożowych jest sieć zasilająca. W oparciu o przeprowadzone symulacjie wykazano słusznosć takiej metody.

  • Substrate noise modeling in early floorplanning of MS-SOCs.

    Publication

    - Year 2005

    W pracy zaproponowano model częstotliwościowy bloków analogowych wrażliwych na zakłócenia oraz bloków cyfrowych generujących zakłócenia w systemach mieszanych realizowanych na wspólnym podłożu krzemowym. Zaproponowane modele zostały wykorzystane w oprogramowaniu optymalizującym rozmieszczenie bloków funkcjonalnych na struktórze krzemowej. Dzieki użyciu procedur optymalizacyjnych uzyskano znaczącą redukcje poziomu zakłóceń przy...

    Full text to download in external service

  • Modeling of damage in a circular plate subjected to dynamic excitation

    Publication

    - Year 2005

    Szereg różnych dziedzin nauki zajmuje się problemem zniszczenia ciśnieniowych metalowych zbiorników (mechanika, termodynamika, mechanika płynów). Tylko niektóre prace ujmują wszystkie aspekty analizy. W prezentowanej pracy przedstawiono numeryczna analizę metalowej płyty poddanej obciążeniu dynamicznemu, aż do momentu zniszczenia. Do analizy zastosowano program MSC.Marc, element powłokowy, i prawo sprężysto lekoplastyczne uwzględniające...

  • Computer modeling of perceptual masking and its audiology applications

    Publication

    - Year 2005

    W referacie zaprezentowano podstawy perceptualne słyszenia pozwalające na stworzenie nowych modeli kodowania dźwięku, w szczególności do zastosowania w protezach słuchu.

  • Temperature modeling in activated sludge systems: a case study

    Publication

    - Year 2005

    Przedstawiono model dynamiki temperatury jako część ogólnego modelu komory osadu czynnego. Transport ciepła opisano za pomocą jednowymiarowego równania adwekcyjno-dyspersyjnego z członem źródłowym opisującym teoretyczny bilans ciepła dla komory. Model został zweryfikowany w oczyszczalni ścieków Rock Creek w stanie Oregon (USA) w oparciu o dane eksploatacyjne oraz pomiary meteorologiczne z pobliskiej stacji meteorologicznej. Wyniki...

  • 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.

  • Activation of peroxymonosulfate using carbon black nano-spheres/calcium alginate hydrogel matrix for degradation of acetaminophen: Fe3O4 co-immobilization and microbial community response

    Publication
    • R. D. C. Soltani
    • M. Mahmoudi
    • G. Boczkaj
    • A. Khataee

    - JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY - Year 2020

    Herein, we focused on the degradation of acetaminophen (ACT) drug in liquid phase by peroxymonosulfate (PMS) activated by carbon black nano-spheres (CBNS). The nanostructured activator was immobilized into calcium alginate hydrogel matrix (CAHM) to avoid the washout of the fine nanostructures. The Langmuir modeling showed an insignificant contribution to the adsorption process in the removal of ACT. The basic pH conditions favored...

    Full text available to download

  • Neural Network-Based Sequential Global Sensitivity Analysis Algorithm

    Publication

    - Year 2022

    Performing global sensitivity analysis (GSA) can be challenging due to the combined effect of the high computational cost, but it is also essential for engineering decision making. To reduce this cost, surrogate modeling such as neural networks (NNs) are used to replace the expensive simulation model in the GSA process, which introduces the additional challenge of finding the minimum number of training data samples required to...

    Full text to download in external service

  • Ontology as a Tool for the IT Management Standards Support

    In this paper the authors discuss the initial idea of using ontologies to model requirements of the standards that support IT management processes. The Open Group Architecture Framework (TOGAF) is set as an example. A need for transition from the generic model do the organization-specific one is indicated. The described example serves as a ground for considering the usefulness of such modeling approach in the wider spectrum of...

  • Decisional DNA based intelligent knowledge model for flexible manufacturing system

    Publication

    - JOURNAL OF INTELLIGENT & FUZZY SYSTEMS - Year 2019

    Modeling an effective mechanism for design and control strategies for the implementation of a flexible manufacturing system (FMS) has been a challenge. Consequently, to overcome this issue various techniques have applied in the past but most of these models are effective only for some specific situation or an element of FMS. In this study, the knowledge representation technique of Decisional DNA (DDNA) is applied to FMS to develop...

    Full text to download in external service

  • Jolanta Łopatowska dr inż.

    Jolanta Łopatowska, assistant professor at the Department of Management Engineering and Quality at the Faculty of Management and Economics, is a graduate of the Faculty of Electronics at Gdańsk University of Technology and Institute of Organization and Design of Production Systems at Gdańsk University of Technology. She obtained Ph.D. degree in the discipline of Economic Science. Her scientific and research interests focus on organizationally...

  • Assessment of the factors influencing on the formation of energy-oriented modes of electric power consumption by water-drainage installations of the mines

    Publication
    • O. Sinchuk
    • I. Sinchuk
    • T. Beridze
    • Y. Filipp
    • K. Budnikov
    • O. Dozorenko
    • R. Strzelecki

    - Mining of Mineral Deposits - Year 2021

    Purpose. Performing the analysis to determine energy-efficient modes and assess the characteristics of the main indicators of electric power consumption by mine water-drainage installations based on the developed research mathematical model. Methods. To achieve the purpose set, a methodology is used to develop the multiple multifactor correlation-regression modeling with respect to the modes of electric power consumption by electrical...

    Full text available to download

  • Reliability data safety instrumented systems SIS from the functional safety analysis example critical instalation

    Open Research Data

    The dataset represents the results of an example of functional safety analysis systems is presented below. It is based on a control system, which consists of some basic components like sensors, programmable logic controllers and valves. It is a part of petrochemical critical installations. The communication between sensor logic controllers and actuators...

  • Determinants of the Internationalization of Family Firms - a Structural Eqquation Modeling Analysis

    Currently, international behaviors of family businesses (FBs) attract a growing interest of researchers. In an increasingly competitive environment, numerous FBs are forced to expand into foreign markets in search for ways to survive or grow. The article is both theoretical and empirical. In the theoretical part it presents theoretical concepts of FBs internationalization, especially determinants for their going international....

    Full text available to download

  • Modeling of truss with cold-formed section and positive eccentricity in the node

    This work is dedicated to establishing the load carrying capacity of tensed and compressed truss’ nodes made of cold-formed open cross sections. The occurrence of bending in the truss’ nodes is the result of a specific production technology for system lattice girders assumed by the designer and the producer. The aim of this research is to present the methodology of conduct for creation of computational models that best depict the...

    Full text available to download

  • Design and modeling of the piezoelectric motor based on three resonance actuators

    Publication

    - Year 2015

    This paper describes a piezoelectric motor which combines advantages from two existing piezoelectric motors topologies. The research work presents the design, simulations and measurements of the piezoelectric motor with three rotation-mode actuators. The aim of the project was to obtain the high speed piezoelectric motor. Other advantages of this conception are blocking torque, short response times, the ability to work in a hostile...

  • Modeling of multi-cavity Fabry-Perot optical fiber sensors

    Publication

    - Year 2015

    Reflectance characteristics of a two-cavity extrinsic Fabry-Perot optical fiber sensor were investigated using computer modeling. Calculations were performed using a plane wave-based approach, selected for clarity of results. Based on the modeling results, it can be concluded that the two-cavity Fabry-Perot interferometer can be used to measure two different quantities, such as refractive index and temperature, independently. It...

    Full text to download in external service

  • Applicability of an effective conductivity approach in modeling thoracic impedance changes

    Publication

    This paper describes numerical simulations of the influence of conductivity changes inside a volume conductor on impedance changes measured on its surface. A simple model based on the finite element method has been developed to estimate an applicability of the effective conductivity theory in human chest modeling. The model consisted of a cylinder with two concentric spheres inside. Simulations were performed for two cases: first...

    Full text available to download

  • Improving performance of large thrust bearings through modeling and experimentation

    Large thrust bearings are highly loaded machine elements and their failures cause serious losses. Start ups and stoppages of the bearing under load are specially critical regimes of operation. Load carrying capacity depends on the profile of the oil gap. In transient states this profile is also changing. In the design of large thrust bearings minimizing thermo-elastic deformations is an important goal, which can be accomplished...

    Full text available to download