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Wyświetlanie 1-15 z 33
Tytuł:
Kształcenie personelu eksploatującego instalacje transportu LNG metodami symulacyjnymi
Training staff qualifications of the transport LNG gas using a computer simulation method
Autorzy:
Adamkiewicz, A.
Igielski, K.
Powiązania:
https://bibliotekanauki.pl/articles/314981.pdf
Data publikacji:
2012
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
instalacje przesyłu gazu
transport LNG
metody symulacyjne
kształcenie personelu
transport gas in liquid form
LNG transport chain
computer simulation method
staff training
Opis:
W artykule przedstawiono możliwości kształcenia i rozwijania kwalifikacji personelu eksploatującego instalacje transportu gazów płynnych z wykorzystaniem metod symulacji komputerowej. Symulator, w procesie kształcenia personelu związanego z obsługą łańcucha transportowego LNG jest kluczowym narzędziem ze względu na praktyczne zastosowanie zdobywanych umiejętności. Akademia Morska w Szczecinie, jako jedyny ośrodek w Polsce posiada bazę dydaktyczną opartą na nowoczesnych rozwiązaniach technicznych pozwalających na szkolenia załóg statków transportujących LNG i personelu terminali.
The article presents the possibility of training and increasing the staff qualifications of the transport gas in liquid form using a computer simulation method. Simulator as a tool in the process of staff training related to the operation of LNG transport chain is essential because of the practical application of skills acquired during the teaching course. Maritime University in Szczecin, as the only center in Poland, has a teaching database based on modern technical solutions to support the training of tanker ship's crew and terminal staff.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2012, 13, 7-8; 61-67
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of integrated modeling of high-temperature steel processing in the aspect of supporting the design of new technologies
Autorzy:
Hojny, Marcin
Głowacki, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1839642.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
Finite Element Method
physical simulation
computer simulation
semi-solid deformation
Opis:
The article presents main assumptions of the methodology of integrated modeling of hightemperature steel processing in the aspect of supporting the design of new technologies. The developed solution uses a methodological research capability of modern Gleeble thermomechanical simulators to simulate physical processes, and the benefits of numerical modeling. This allows for restricting the number of expensive experimental tests to the minimum, e.g. by selecting a suitable heating schedule to achieve the desired temperature at the sample section, or getting additional information about the process, eg. estimating the zones with diversified grain growth dynamics, information on local cooling rates at any point within the volume of the sample tested. Mathematical models are original solutions of the developed methodology, such as the thermomechanical model of steel deformation in the semi-solid state, and the multi-scale model of resistance heating coupled with grain growth modelling in the micro scale. The work is supplemented with the main assumptions of the developed mathematical models together with examples of their practical use to support physical simulations.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 361-371
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulating the spread of the BSE disease: a cellular automata approach
Autorzy:
Magdoń-Maksymowicz, M.
Maksymowicz, A. Z.
Powiązania:
https://bibliotekanauki.pl/articles/1964173.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska
Tematy:
computer simulation
disease spreading
BSE
cellular automata method
Opis:
The rules of evolution applied in the cellular automata approach may correspond to the propagation of the mad cow disease. In a computer simulation of the BSE disease's spread both inherited and infectious mechanisms are accounted for. The initial population of items is randomly distributed on a two-dimensional square lattice, Nx × Ny = 1000 × 1000, with a fraction of 1 percent the items already infected. Alternatively, faulty prions may spontaneously develop during the simulation with a very small frequency. Our results indicate a critical probability, pc, of BSE transmission, so that for p below the threshold the population recovers. For p > pc the disease is launched in the population with a dynamic equilibrium between the healthy and infected fractions of the population. The threshold is very sensitive to spatial clustering of the population and the detailed rules for the disease's onset, evolution and propagation.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2005, 9, 2; 179-185
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Simulation of the Relationship between Selected Properties of PVD Coatings
Autorzy:
Śliwa, A.
Kwaśny, W.
Sitek, W.
Bonek, M.
Powiązania:
https://bibliotekanauki.pl/articles/351597.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
numerical techniques
stresses
microhardness
computer simulation
finite element method
Opis:
The possibility to apply the Finite Element Method to calculate internal stresses which occur in Ti+TiN, Ti+Ti(CxN1-x) and Ti+TiC coatings obtained in the magnetron PVD process on the sintered high-speed steel of the PM HS6-5-3-8 type. For the purpose of computer simulation of internal stresses in coatings with the use of MES, the correct model of analyzed specimens was worked out and then it was experimentally verified by comparison of calculation results with the results of computer simulation. Accurate analysis of correlations indicated especially strong dependence between internal stresses and microhardness and between microhardness and erosion resistance what created conditions for establishing the dependence between internal stresses obtained in the result of computer simulation and erosion resistance as basic functional quality of coating. It has essential practical meaning because it allows to estimate predictable erosion resistance of coating exclusively on the base of the results of computer simulation for used parameters in the process of coating manufacturing.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 481-484
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Multiscale Model of Heating-Remelting-Cooling in the Gleeble 3800 Thermo-Mechanical Simulator System
Autorzy:
Hojny, M.
Głowacki, M.
Bała, P.
Bednarczyk, W.
Zalecki, W.
Powiązania:
https://bibliotekanauki.pl/articles/353788.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DEFFEM package
finite element method
Monte Carlo method
physical simulation
computer simulation
mushy-zone
extra-high temperatures
Opis:
The paper presents a multi-scale mathematical model dedicated to a comprehensive simulation of resistance heating combined with the melting and controlled cooling of steel samples. Experiments in order to verify the formulated numerical model were performed using a Gleeble 3800 thermo-mechanical simulator. The model for the macro scale was based upon the solution of Fourier-Kirchhoff equation as regards predicting the distribution of temperature fields within the volume of the sample. The macro scale solution is complemented by a functional model generating voluminal heat sources, resulting from the electric current flowing through the sample. The model for the micro-scale, concerning the grain growth simulation, is based upon the probabilistic Monte Carlo algorithm, and on the minimization of the system energy. The model takes into account the forming mushy zone, where grains degrade at the melting stage – it is a unique feature of the micro-solution. The solution domains are coupled by the interpolation of node temperatures of the finite element mesh (the macro model) onto the Monte Carlo cells (micro model). The paper is complemented with examples of resistance heating results and macro- and micro-structural tests, along with test computations concerning the estimation of the range of zones with diverse dynamics of grain growth.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 401-412
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new, effective method for computing the interaction potential of hard cyclic multimer systems
Autorzy:
Bilski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1940716.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska
Tematy:
hard cyclic multimer
hard potential
computer simulation
Monte Carlo method
Opis:
Studies of effiiency of several methods for calculating the interaction potential of a pair of two-dimensional hard cyclic multimers - molecules formed by hard disks (atoms) placed at the vertices of a regular polygon - are reported in this work. Such hard-body particles, known as hard cyclic multimers, constitute a class of important reference systems in modeling structural and thermodynamic properties of molecular systems. A new method is proposed which can be easily implemented to Monte Carlo simulations of two-dimensional cyclic multimers and which is faster than the fastest method used previously.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 1; 5-13
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oil pipeline leak detection using GPR method - simple case study
Autorzy:
Fąfara, Z.
Lewandowska-Śmierzchalska, J.
Matuła, R.
Powiązania:
https://bibliotekanauki.pl/articles/299301.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
pipelines
leak detection
GRP method
computer simulation
finite element modelling
Opis:
Modelling experiment was used to investigate the abilities of using ground penetrating radar (GPR) to detect oil leaks in the underground pipeline system. Leaks not only waste precious natural resources but also create substantial damage to the transportation system within urban environments. Surface geophysical methods are noninvasive tools used to characterize the changes in the physical properties of the subsurface material. This characterization, in consequence, is used to interpret the geological and hydrogeological conditions of the strata. GPR is a reflection-based technique which uses high frequency electromagnetic waves to acquire subsurface information. GPR responds to changes in electrical properties, which are a function of soil and rock material and moisture content. A simple experiment was conducted to determine the validity and effectiveness of GPR technology in detecting leakage in metal pipelines. Initially, a prototype model was designed to simulate a pipe leak. A 1.5 GHz antenna modeling mode was used to collect GPR data. The test was modelled using sandy soil material that is representative for pipelines construction. Also model simulations are being used to select an appropriate equipment configuration (frequency band, type of antenna and real-time imaging software) prior to data acquisition.
Źródło:
AGH Drilling, Oil, Gas; 2018, 35, 1; 165-171
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Fluidity of Al-Si Alloy: Computer Simulation of the Influence of Temperature, Composition, and Pouring Speed
Autorzy:
Futáš, P.
Petrík, J.
Pribulová, A.
Blaško, P.
Palfy, P.
Powiązania:
https://bibliotekanauki.pl/articles/351852.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si
fluidity
computer simulation
regression analysis
Monte Carlo method
Opis:
The purpose of this study is to identify relationships between the values of the fluidity obtained by computer simulation and by an experimental test in the horizontal three-channel mould designed in accordance with the Measurement Systems Analysis. Al-Si alloy was a model material. The factors affecting the fluidity varied in following ranges: Si content 5 wt.% – 12 wt.%, Fe content 0.15 wt.% – 0.3 wt. %, the pouring temperature 605°C-830°C, and the pouring speed 100 g · s-1 – 400 g · s-1. The software NovaFlow&Solid was used for simulations. The statistically significant difference between the value of fluidity calculated by the equation and obtained by experiment was not found. This design simplifies the calculation of the capability of the measurement process of the fluidity with full replacement of experiments by calculation, using regression equation.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1799-1804
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inżynierskie zastosowania metody elementów dyskretnych
Autorzy:
Mendyka, P.
Powiązania:
https://bibliotekanauki.pl/articles/303157.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Druk-Art
Tematy:
metoda elementów dyskretnych
symulacja transportu
symulacja komputerowa
finite element method
computer simulation
simulation of transport
Opis:
W artykule przedstawiono ogólne założenia i warunki brzegowe stosowania Metody Elementów Dyskretnych, zwanej w skrócie DEM (ang. Discrete Element Method). Przedstawiono schematycznie proces symulacji z wykorzystaniem opisywanej metody, wskazując na istotną rolę modeli kontaktowych. Opisano również zalety najczęściej stosowanych pakietów oprogramowania implantujących DEM. Szczególną uwagę poświęcono przemysłowym zastosowaniom metody, tj. symulacjom transportu, ładowania, kruszenia i granulacji materiałów sypkich i ziarnistych. Referat podsumowano, podając najważniejsze zalety i wady związane ze stosowaniem metody DEM.
The article presents the general assumptions and boundary conditions for the use of the Discrete Element Method (DEM). The simulation process implementing described method is presented schematically, indicating the important role of contact models. The advantages of the most commonly used DEM software packages are also described. Particular attention has been paid to industrial applications of the method: transport, loading, crushing and granulation of bulk and granular materials. The paper summarizes the main advantages and disadvantages associated with the use of the DEM.
Źródło:
Napędy i Sterowanie; 2017, 19, 11; 117-124
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A toy model of prebiotic peptide evolution: the possible role of relative amino acid abundances
Autorzy:
Polanco, Carlos
Buhse, Thomas
Samaniego, José
Castañón González, Jorge
Powiązania:
https://bibliotekanauki.pl/articles/1039570.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polarity index method.
computer simulation
prebiotic polymerization
toy model
peptides
amino acids
Opis:
This paper presents a mathematical-computational toy model based on the assumed dynamic principles of prebiotic peptide evolution. Starting from a pool of amino acid monomers, the model describes in a generalized manner the generation of peptides and their sequential information. The model integrates the intrinsic and dynamic key elements of the initiation of biopolymerization, such as the relative amino acid abundances and polarities, as well as the oligomer reversibility, i.e. fragmentation and recombination, and peptide self-replication. Our modeling results suggest that the relative amino acid abundances, as indicated by Miller-Urey type electric discharge experiments, played a principal role in the early sequential information of peptide profiles. Moreover, the computed profiles display an astonishing similarity to peptide profiles observed in so-called biological common ancestors found in the following three microorganisms; E. coli, M. jannaschii, and S. cereviasiae. The prebiotic peptide fingerprint was obtained by the so-called polarity index method that was earlier reported as a tool for the identification of cationic amphipathic antibacterial short peptides.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 175-182
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual MRTD – an indirect method to measure MRTD of thermal imagers using computer simulation
Autorzy:
Chrzanowski, Krzysztof
Hong Viet, Nguyen
Powiązania:
https://bibliotekanauki.pl/articles/1835813.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
MRTD
minimum resolvable temperature difference
virtual MRTD
indirect method
computer simulation
thermal imager
Opis:
Minimum resolvable temperature difference (MRTD) is considered as the most important parameter of thermal imagers. A new method of MRTD measurement without drawbacks of other methods is presented in this paper. Proposed MRTD measurement method coded as virtual MRTD is based on a three steps measurement concept using semi-automatic objective measurements and computer simulation. First, objective parameters of the tested thermal imager are measured. Second, software simulates this tested thermal imager and generates the image of 4-bar target of specified spatial frequency (size) and contrast (temperature difference). Third, a human observer analyses the images of the 4-bar target generated by the software on the screen of PC set and measures MRTD of the simulated thermal imager at specified set of spatial frequencies. The proposed method offers higher measurement speed, lower cost and typically better accuracy in comparison with the typical MRTD measurement method.
Źródło:
Optica Applicata; 2020, 50, 4; 671-688
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal evaluation criteria of project-oriented socio-economic and technical systems development
Temporal'nye kriterii ocenki razvitija proekto-orientirovannykh social'no-ehkonomicheskikh i tekhnicheskikh sistem
Autorzy:
Rach, V.
Sultan, M.
Powiązania:
https://bibliotekanauki.pl/articles/793264.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
temporal order
technical system
socioeconomic system
comparative analysis
computer simulation
present state
development process
calculation method
computer experiment
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ispolzovanie metoda konechnykh elementov dlja konstruktorskikh raschetov molotkovykh drobilok
Use the method finit element for design calculation of hammer crushers
Autorzy:
Devin, V.
Tkachuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/77570.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
hammer mill
feed mill
crusher
rotating part
finite element method
computer simulation
mathematical apparatus
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Analysis of Motion Dynamics and Resistance of the Multipurpose Boat Operating in Shallow Water
Autorzy:
Kulczyk, T.
Górnicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/116257.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Hydrodynamics
Motion Dynamics
Shallow Water
Miltipurpose Boat
Boat's Motion
Computer Simulation
CFD Method, Resistance
Opis:
Polish market of small boats has been developed very dynamically in recent years. Market competition forces the shipyards to build new more efficient hull forms and to cut the cost of production as well. This is why modern computer simulation programs are used more often by naval architects. Another trend is to design more universal ships that may be used by larger number of diversified customers. This paper presents project proposal of multipurpose boat hull form. The boat was design to fulfil the requirements imposed by public services like water police, fire brigades, and border guards. It is supposed to be operated on unexplored floodplains and other type shallow waters. The analysis of boat’s motion was based on computer simulations. The resistance curve was evaluated with two methods: comparison study of model test results of similar ships and CFD methods. The results obtained from Ansys Fluent and FINE/Marine systems were compared in this paper. It was shown that taking into consideration dynamic trim and sinkage has a significant impact on free surface capture and resistance values.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 359-363
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual magnetic resonance imaging as a didactic aid
Autorzy:
Makiewicz, P.
Penkala, K.
Powiązania:
https://bibliotekanauki.pl/articles/118362.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
NMR
MRI
VMRI
spin echo method
SE
computer simulation
didactics
metoda echa spinowego
symulacje komputerowe
dydaktyka
Opis:
The paper concerns aspects of using Nuclear Magnetic Resonance in medicine. The phenomenon of NMR is basis for the Magnetic Resonance Imaging (MRI). Simulation of creating an image in spin echo (SE) method of MRI is used to obtain additional, arbitrary chosen images of the patient. Virtual MRI technique allows changing contrast of images in real time without use of any special equipment. Despite diagnostic benefits, VMRI is very helpful in didactics. Performing of such simulations greatly improves understanding of MRI principles and image contrast manipulation by the students.
Artykuł dotyczy aspektów zastosowań magnetycznego rezonansu jądrowego w medycynie Symulacja tworzenia obrazu echa spinowego (SE) w metodzie MRI jest używana w celu uzyskania dodatkowych, dowolne wybranych obrazów pacjenta. Wirtualna technika MRI pozwala na zmianę kontrastu obrazów w czasie rzeczywistym, bez użycia specjalnego sprzętu. Pomimo świadczeń diagnostycznych, VMRI jest bardzo pomocna w dydaktyce. Przeprowadzenie takich symulacji znacznie poprawia zrozumienie zasad MRI i manipulacji kontrastu obrazu przez uczniów.
Źródło:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2013, 5; 85-90
1897-7421
Pojawia się w:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 33

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