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Wyniki wyszukiwania dla: mathematical modelling and identification
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Identification of discontinuites in composite rods and beams based on Lamb wave propagation
PublikacjaW pracy omówiono metodę identyfikacji typu nieciągłości w belkach i prętach kompozytowych, oparta o analizę zmain w propagacji fali Lamba.
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Heavy Duty Vehicle Fuel Consumption Modelling Based on Exploitation Data by Using Artificial Neural Networks
PublikacjaOne of the ways to improve the fuel economy of heavy duty trucks is to operate the combustion engine in its most efficient operating points. To do that, a mathematical model of the engine is required, which shows the relations between engine speed, torque and fuel consumption in transient states. In this paper, easy accessible exploitation data collected via CAN bus of the heavy duty truck were used to obtain a model of a diesel...
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RMS-based damage identification in adhesive joint between concrete beam and steel plate using ultrasonic guided waves
PublikacjaAdhesive joints have numerous applications in many branches of industry, such as civil engineering, automotive, aerospace and shipbuilding. As with most structural elements, adhesive joints can experience any damage mechanism, which induces the need for diagnostic testing. Ultrasonic waves are widely used for non-destructive inspection of many structures and their elements, including adhesive joints. Guided wave propagation method...
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Central European Journal of Economic Modelling and Econometrics
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International Journal of Engineering Systems Modelling and SImulation
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International Journal of Data Mining Modelling and Management
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International Journal of Vehicle Systems Modelling and Testing
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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
PublikacjaThe 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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Modeling of medium flow processes in transportation pipelines - the synthesis of their state-space models and the analysis of the mathematical properties of the models for leak detection purposes
PublikacjaThe dissertation concerns the issue of modeling the pipeline flow process under incompressible and isothermal conditions, with a target application to the leak detection and isolation systems. First, an introduction to the model-based process diagnostics is provided, where its basic terminology, tools, and methods are described. In the following chapter, a review of the state of the art in the field of leak detection and isolation...
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Risk Modelling with Bayesian Networks - Case Study: Construction of Tunnel under the Dead Vistula River in Gdansk
PublikacjaThe process of decision-making in public procurement of construction projects during the preparation and implementation phases ought to be supported by risk identification, assessment, and management. In risk assessment one has to take into account factors that lead to risk events (background info), as well as the information about the risk symptoms (monitoring info). Typically once the risks have been assessed a decision-maker...
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Convenient identification of desulfoglucosinolates on the basis of mass spectra obtained during liquid chromatography-diode array-electrospray ionisation mass spectrometry analysis: Method verification for sprouts of different Brassicaceae species extracts
PublikacjaOver the past decade, glucosinolates (GLs) present in different tissues of Brassicaceae and their breakdown products, especially isothiocyanates formed after myrosinase catalyzed hydrolysis, have been regarded as not only environment friendly biopesticides for controlling soilborne pathogens, but most importantly as promising anticarcinogenic compounds. For these reasons, the identification and quantitative determination of the...
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Identification of novel halogenated naturally occurring compounds in marine biota by high-resolution mass spectrometry and combined screening approaches
PublikacjaMarine animals, plants or bacteria are a source of bioactive naturally-occurring halogenated compounds (NHCs) such as bromophenols (BPs), bromoanisoles (BAs) and hydroxylated or methoxylated analogues of polybrominated diphenyl ethers (HO-PBDEs, MeO-PBDEs) and bromobiphenyls (HO-BBs, MeO-BBs). This study applied a comprehensive screening approach using liquid chromatography high-resolution mass spectrometry and combining target,...
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Identification of synergistic and antagonistic actions of environmental pollutants: Bisphenols A, S and F in the presence of DEP, DBP, BADGE and BADGE·2HCl in three component mixtures
PublikacjaEcosystems are facing increased pressure due to the emission of many classes of emerging contaminants. However, very little is known about the interactions of these pollutants, such as bisphenols (BPs), plasticizers or pharmaceuticals. By employing bioluminescent bacteria (Microtox assay), we were able to define interactions between selected emerging pollutants (namely BPA, BPS, BPF, BADGE, BADGE·2HCl, DEP, DBP) in ternary mixtures, at...
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Mass spectrometry based identification of geometric isomers during metabolic stability study of a new cytotoxic sulfonamide derivatives supported by quantitative structure-retention relationships
PublikacjaA set of 15 new sulphonamide derivatives, presenting antitumor activity have been subjected to a metabolic stability study. The results showed that besides products of biotransformation, some additional peaks occurred in chromatograms. Tandem mass spectrometry revealed the same mass and fragmentation pathway, suggesting that geometric isomerization occurred. Thus, to support this hypothesis, quantitative structure-retention relationships...
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Jakub Miler dr inż.
OsobyKariera akademicka: 2000: mgr inż. Wydział ETI, Politechnika Gdańska, praca pt. "Computer system for supporting risk management in a software engineering project", promotor prof. Janusz Górski 2005: dr inż. Wydział ETI, Politechnika Gdańska, rozprawa pt. "A Method of Software Project Risk Identification and Analysis", obroniona z wyróżnieniem, dziedzina nauki techniczne, dyscyplina informatyka, promotor prof. Janusz Górski Zainteresowania...
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Neural network modelling of the influence of channelopathies on reflex visual attention
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WAVE AND CURRENT MODELLING OVER THE BALTIC SEA AND THE GDAŃSK BAY
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Numerical modelling of thermodynamics and dynamics of sea ice in the Baltic Sea
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On the tolerance modelling of heat conduction in functionally graded laminated media
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A Typology of Small Business Growth Modelling: A Critical Literature Review
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Modelling of Edge Insulation Depending on Boundary Conditions for the Ground Level
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Computational modelling of concrete behaviour under static and dynamic conditions
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Investigation of the reliability of local strain analysis by means of the triangle modelling
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Numerical modelling of conical wave formation in multimode optical fibers
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Propeller Load Modelling In The Calculations Of Marine Shafting Torsional Vibrations
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Cointegration Modelling for Health and Condition Monitoring of Wind Turbines - An Overview
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Numerical modelling and experimental verification of compressible squeeze film pressure
PublikacjaThe validity of using the Reynolds equation for compressible squeeze film pressure was tested with computational fluid dynamics (CFD). A squeeze film air bearing was instrumented with pressure sensors and non-contacting displacement probes to provide transient measurements of film thickness and pressure. The film thickness measurements also provided input parameters to the numerical prediction. However, numerical results showed...
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Mechanical Modelling of Human Fascia in the Problem of Ventral Hernia Repair
PublikacjaPraca dotyczy badań doświadczalnych tkanki ludzkiej oraz symulacji numerycznej zachowania tej tkanki. Na podstawie eksperymentu dokonuje się identyfikacji modelu materiałowego tkanki a następnie w celu wweryfikacji przeprowadza się symulacje numeryczną zachowania modelowanej struktury. Celem badań jest uzyskanie informacji przydatnych podczas leczenia przepuklin brzusznych u ludzi.
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Modelling and static analysis of thin-walled structures, problems and applications
PublikacjaW pracy przedstawiono pewne problemy związane z modelowaniem i analizą statyczną konstrukcji cienkościennych: belek, ram i rusztów zbudowanych z elementów o bisymetrycznym przekroju poprzecznym. Zachowanie elementów opisano za pomocą klasycznej teorii prętów cienkościennych o przekroju nieodkształcalnym. Uwzględniono tym samym efekty bimomentowe od skręcania belek. Niestyty brakuje koniecznych do przeprowadzenia analizy styacznej...
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Modelling of energy flow in mechatronic systems. A bond graph approach
PublikacjaW referacie przedstawiono w sposób jednoliy modelowanie systemów mechatroniki metodą grafów wiązań (GW) w aspekcie symulacji przepływu energii. Omówiono ogólne założenia modelowania w ujęciu GW. Modelowanie przepływu energii rozważano na przykładzie napędu pojazdu hybrydowego PH-MAK.
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Modelling of Graphene Field-Effect Transistor for lectronic sensing applications
PublikacjaA top-gated Graphene Field-Effect Transistor (GFET) suitable for electronic sensing applications was modelled. The applied simulation method reproduces correctly the output transfer GFET characteristics and allows to investigate doping effect caused by different physical, chemical or biological factors. The appearance of additional charge in the system results in the shift of the current-voltage characteristic. This feature could...
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Quantum chemical modelling of the process of lithium insertion into WO3 films
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Dielectric Spectroscopy Studies and Modelling of Piezoelectric Properties of Multiferroic Ceramics
PublikacjaCompounds and solid solutions of bismuth ferrite (BiFeO3)—barium titanate (BaTiO3) system are of great scientific and engineering interest as multiferroic and potential high-temperature lead-free piezoelectric materials. In the present paper, the results of research on the synthesis and characterisation of 0.67Bi1.02FeO3–0.33BaTiO3 (67BFBT) ceramics in terms of crystal structure and dielectric and piezoelectric properties are reported....
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Respiratory system modelling and simulation based on the forced oscillation technique
Publikacja.
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Modelling of energy flow in electrical machines. A bond graph approach
PublikacjaPrzedstawiono w ujęcia grafów wiązań model przepływu energii/mocy w maszynach elektrycznych pracujących w hybrydowych systemach przetwarzania energii. Jako przykład do rozważań przyjęto system napędu trakcyjnego pojazdów hybrydowych.
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Modelling Of Commercial Websites. A New Perspective On Usability And Customer Relation
PublikacjaFrom an economic point of view, a critical aspect of online services is their ability to retain customers. The aim of presented study was the use of a layered model VIPR (Visual - Interaction - Process - Relation ) for commercial services online. The indicator of trust and establishing lasting relationships were assessment achieved from experienced users of commercial online services (n = 207), obtained by means of Web Credibility...
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Context-aware User Modelling and Generation of Recommendations in Recommender Systems
PublikacjaRecommender systems are software tools and techniques which aim at suggesting new items that may be of interest to a user. This dissertation is focused on four problems in recommender systems domain. The first one is context-awareness, i.e. how to obtain relevant contextual information, how to model user preferences in a context and use them to make predictions. The second one is multi-domain recommendation, which aim at suggesting...
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Comparison of modelling and measurement results of spectra emitted by a programmable lamp
PublikacjaNowadays artificial light with an optimized spectrum is used in many different applications. For instance, it is widely used in museums and exhibitions to illuminate the art. Moreover, such light stimulates the growth of plants, or can be applied in industry and healthcare. To achieve the best results for each application, the adjusting of a dedicated spectrum is required, which is a complicated task. The ongoing research is focused...
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NUMERICAL MODELLING AND EXPERIMENTATION OF HISTORICAL CARPENTRY CORNER LOG JOINTS
PublikacjaThe main purpose of this research is to determine the stress distributions on the contact surfaces between the logs of the historical carpentry corner joints. The additional purpose is to compare the stress distribution for four different boundary conditions in the case of dry and wet pine wood. The paper presents the results of numerical analysis of the shortcorner dovetail connection and the saddle notch corner joint, which are...
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Modelling of sequencing batch reactor operating at various aeration modes
PublikacjaThe presented study involved designing a computer model of a sequencing batch reactor (SBR) at laboratory scale. The data pertaining to the technical aspects of the bioreactor and quality indicators of wastewater constituted the input for the employed simulation tool, i.e. GPS-X software package. The results of a simulation involving a 12-hour operation cycle are presented in this work; each cycle included 6 phases: filling, mixing,...
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Business process modelling and simulation using formal experience record
PublikacjaZaproponowano modelowanie procesow biznesowych w oparciu o formalny zapis doswiadzcen. Przedtswiono softwerowa implementacje zaproponowego modelu.
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Harmonics produced by traction substations – computer modelling and experimental verification
PublikacjaVoltage and current harmonics have a detrimental effect on the components of a power system. Current harmonics may result in the overload and damage to power transformers. Voltage harmonics may result in, for example, damage to capacitor banks used to compensate reactive power. Devices which contribute to both current and voltage distortion include traction rectifiers. This paper presents results of the computer investigation of...
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Modelling of the Movement of Designed Vehicles on Parking Space for Designing Parking
PublikacjaNowadays, in all cities there is an acute problem of lack of parking spaces. The vehicles are becoming more and more not only in megacities, but also in small cities of the country, and there are no more parking places - the pace of solving the problem is several times slower than the speed of transport growth among the citizens. The article is dedicated to determination of the optimum sizes parking place for designing vehicles...
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Modelling selected road safety measures at the regional level in Europe
PublikacjaRegions are Europe’s basic levels of management. The literature was reviewed to identify regional safety analyses and some of the factors that are important for road safety in the regions. Next, data were collected atthe regional NUTS 2 level in Europe for the years 1999-2008. An analysis of the data helped identify f actors which have the strongest bearing on fatalities and other safety measures. This paper presents the initial...
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Modelling of network schedule including priority of selected technical resources
PublikacjaThe paper presents a method of network planning CPM – Critical Path Method. The author compares models of optimal solutions to design deadlines for individual works, taking various leading technical resources such as is labor and a tower crane into account.
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Molecular modelling of amphotericin B-ergosterol primary complex in water
PublikacjaBadano właściwości pierwotnego kompleksu amfoterycyny B z ergosterolem przy pomocy symulacji dynamiki molekularnej. Otrzymane w wyniku naszych symulacji rezultaty słabo odpowiadają postulowanym przez innych autorów modelom kompleksu antybiotyk-sterol. Z drugiej strony uzyskane geometrie nie są sprzeczne z wynikami eksperymentów biofizycznych dotyczących powstawania kompleksów w wodzie i w środowisku wodno-alkoholowym.
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Molecular modelling of membrane sterols with the use of the GROMOS 96 forcefield
PublikacjaPodstawowym zadaniem tego projektu było udowodnienie zasadności stosowania pola siłowego GROMOS 96 do symulacji steroli błonowych metodą dynamiki molekularnej. Uzyskane wyniki jasno wskazują, że to pole siłowe bardzo dobrze nadaje się do symulacji silnie lipofilowych układów.
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Food microstructure systems modelling regarding interaction and contact phenomena.
PublikacjaPrzedstawiono wybrane fragmenty teorii modelowania w strukturach rozproszonych mikrostruktury żywności, w których zostały uwzględnione wzajemne oddziaływania cząstek oraz występujące zjawiska kontaktowe. Do oszacowania tych oddziaływań wykorzystano zmodyfikowany przez autora model Buczkowskiego i Kleibera.
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Nucleate pool boiling modelling and experimental investigation : chapter 7
PublikacjaOmówiono wpływ powłoki porowatej nanoszonej na całą powierzchnię rurki lub jej fragment na osiągany współczynnik przejmowania ciepła, krytyczne gęstości strumienia ciepła, a także obwodowy rozkład temperatury przy wrzeniu pęcherzykowym na zewnętrznej powierzchni poziomej rurki.Przedstawiono wyniki badań częstotliwości odrywania się pęcherzyków oraz pól prędkości wokół wzrastającyh i unoszących się pęcherzyków przy wrzeniu z pojedynczych...
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Improved correlation for modelling of boiling processes in small diameter tubes.
PublikacjaW pracy przedstawiono rozważania na temat wrzenia w przepływie dwufazowym w kanałach o małej średnicy. Modyfikacji uległa korelacja zapostulowana wcześniej przez Mikielewicz i inni, poprzez wprowadzenie efektów związanych z napięciem powierzchniowym, także liczba konwekcyjna została poprawiona. Zastosowanie korelacji jest bardzo proste z uwagi na jej analityczną postać, co jest jej podstawową zaletą. Porównanie z danymi eksperymentalnymi...