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Wyświetlanie 1-15 z 35
Tytuł:
Player and Stage at PJIIT Robotics Laboratory
Autorzy:
Ośmiałowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/950816.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
Robotics software
simulation software
open source software
robotics programming
robotics laboratory
Opis:
Player/Stage/Gazebo is an Open-Source Software project designed for robotics research that provides infrastructure for distributed access to robotics equipment both real and simulated. Founded by Brian Gerkey, Richard Vaughan, Andrew Howard, Kasper Stoy and Nate Koenig, it it soon became popular among roboticists community. Project itself gained lots of contributors and many related software projects were started that support or make use of Player/Stage/Gazebo software. At PJIIT Robotics Laboratory we decided to deploy this software for educational purposes as well as for our Virtual Robotics Laboratory project where it plays significant role as an integration platform. Since it is Open-Source Software we were able to contribute new modules and also release fixes for bugs that we have found. This paper deals with our experiences with using and maintaining Player and Stage software.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2007, 1, 3; 21-28
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harmonic domain modelling of transformer core nonlinearities using the DIgSILENT powerfactory software
Autorzy:
Wiechowski, W.
Bak-Jensen, B.
Bak, C. L.
Lykkegaard, J.
Powiązania:
https://bibliotekanauki.pl/articles/262821.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
autotransformers
harmonic analysis
nonlinearities
simulation software
transformer cores
Opis:
This paper demonstrates the results of implementation and verification of an already existing algorithm that allows for calculating saturation characteristics of singlephase power transformers. The algorithm was described for the first time in 1993. Now this algorithm has been implemented using the DIgSILENT Programming Language (DPL) as an external script in the harmonic domain calculations of a power system analysis tool PowerFactory [10]. The algorithm is verified by harmonic measurements on a single-phase power transformer. A theoretical analysis of the core nonlinearities phenomena in single and three-phase transformers is also presented. This analysis leads to the conclusion that the method can be applied for modelling nonlinearities of three-phase autotransformers.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2008, 14, 1; 3-11
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tool path definition in Virtual Machines world
Autorzy:
Wypysiński, R.
Powiązania:
https://bibliotekanauki.pl/articles/132140.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
virtual machine
virtual machining
machine simulator
simulation process
simulation software
Eureka
Opis:
Virtual Machine (VM), called also machine simulator, is 3D computer model which is geometrically and functionally the same like real machine (CNC machine tool or robot). They are used mainly for different kind of syntax errors and collision detection in CNC programs. Whole simulation process is also called Virtual Machining. This kind of off-line programming require CAM software support to generate tool paths and transform them to machine commands. The most advanced virtual machining software gives more possibilities to influence machines behavior – it is not only simulation software. This article describe it based on Eureka virtual machining software.
Źródło:
Advanced Technologies in Mechanics; 2014, 1, no. 1 (1); 15-18
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power-to-gas technologies in terms of the integration with gas networks
Autorzy:
Chaczykowski, M.
Osiadacz, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/175166.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy storage
renewable gas
hydrogen injection
gas quality
quality tracking
simulation software
Opis:
In a situation of surplus electricity production from fluctuating renewable energy sources, the optimal allocation, capacity and security of energy storage will play a pivotal role in the management of energy systems. In this context, highly flexible storage facilities providing access to stored energy at very short times are gaining in importance. Power-to-gas technologies combined with the injection of the produced gas to the natural gas network create the possibility of using the existing natural gas infrastructure to store large amounts of electricity converted into chemical energy of the fuel. This paper provides overview of selected demonstration projects carried out in this field. The literature review of the sensitivity of the elements of the gas value chain to the increased hydrogen concentrations is conducted. Next, the results of the simulation study of the effect of hydrogen injection on the hydraulic properties of a gas distribution network providing gas to 1167 customers are presented.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2017, 137; 85-103
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected Principles of Feeding Systems Design: Simulation vs Industrial Experience
Autorzy:
Perzyk, M.
Kochański, A.
Mazurek, P.
Karczewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/379595.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solidification process
castings defects
simulation software
feeding flow
krzepnięcie
wady odlewów
przepływ
oprogramowanie
Opis:
Simulation software dedicated for design of casting processes is usually tested and calibrated by comparisons of shrinkage defects distribution predicted by the modelling with that observed in real castings produced in a given foundry. However, a large amount of expertise obtained from different foundries, including especially made experiments, is available from literature, in the form of recommendations for design of the rigging systems. This kind of information can be also used for assessment of the simulation predictions. In the present work two parameters used in the design of feeding systems are considered: feeding ranges in horizontal and vertical plates as well as efficiency (yield) of feeders of various shapes. The simulation tests were conducted using especially designed steel and aluminium castings with risers and a commercial FDM based software. It was found that the simulations cannot predict appearance of shrinkage porosity in horizontal and vertical plates of even cross-sections which would mean, that the feeding ranges are practically unlimited. The yield of all types of feeders obtained from the simulations appeared to be much higher than that reported in the literature. It can be concluded that the feeding flow modelling included in the tested software does not reflect phenomena responsible for the feeding processes in real castings properly. Further tests, with different types of software and more fundamental studies on the feeding process modelling would be desirable.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 77-82
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of injector placement on the dose preparation conditions in a gasoline direct injection system
Autorzy:
Sidorowicz, M.
Pielecha, I.
Powiązania:
https://bibliotekanauki.pl/articles/133644.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
gasoline direct injection
fuel spraying
simulation software
bezpośredni wtrysk benzyny
rozpylanie paliwa
programy symulacyjne
Opis:
Direct fuel injection requires appropriate conditions for proper ignition of the formed mixture. The proper combustion process is shaped by the direct fuel injection, whose parameters vary. Preparation of the dose requires proper injector placement in the combustion chamber. This article focuses on the issue of the injector specific spatial and angular position in order to implement the injection and atomization of the fuel. The injector's pseudo-optimal location has been presented along with several changed positions. The research was conducted as a simulation experiment using AVL FIRE 2017 software. The best position of the injector was selected based on the fuel spraying and injection process indicators. It has been shown that the spatial position has the most impact and the injector placement angle is of secondary importance.
Źródło:
Combustion Engines; 2018, 57, 1; 35-43
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usage of connor inlets to eliminate shrinkage
Autorzy:
Fecko, D.
Vasková, I.
Eperješi, L'.
Závodný, M.
Powiązania:
https://bibliotekanauki.pl/articles/380256.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
żeliwo szare
eliminacja skurczu
oprogramowanie symulacyjne
grey cast iron
connor inlet
shrinkage elimination
simulation software
Opis:
The demand for castings of high quality and sound work is nowadays very high. The production of sound castings without foundry errors is the big issue in modern foundries. Foundry simulation software can do a lot to help improve the disposition of castings, gating system and feeder system, and assure good filling and solidification conditions, and also produce sound casting without the need of the old method of 'try and error'. One can easily change a lot of parameters for filling and solidification, and create the best proposal for production. Connor inlets have two functions. One is that it serves as an ingate, through which molten metal passes and comes into the mould cavity. The second function is that it serves as a feeder and substitutes the metal contracted during solidification and cooling of the castings. It can also save quite a lot of metal in comparison to classic feeders.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 25-28
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The injector location impact on the fuel combustion process in a direct gasoline injection system
Autorzy:
Sidorowicz, M.
Pielecha, I.
Powiązania:
https://bibliotekanauki.pl/articles/133422.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
gasoline direct injection
fuel combustion
exhaust emission
simulation software
bezpośredni wtrysk benzyny
spalanie paliwa
emisja spalin
programy symulacyjne
Opis:
The article contains an analysis of the fuel dose combustion phenomena and exhaust emissions in a direct injection system of an SI engine for variable injector location in the combustion chamber. The research performed is a continuation of the research presented in the article CE-2018-104. The tests were performed using the AVL Fire 2017 simulation environment. 27 injector placement combinations in three planes were analyzed: axial distance from the cylinder axis, injector depth relative to the head and angular position relative to the cylinder axis. An optimal solution was chosen, taking into account the significance of individual indicators. It was shown that the greatest impact in terms of the most advantageous combustion process indicators is the injector setting depth in the combustion chamber cavity, while the distance from the cylinder axis is of secondary importance. The smallest changes in the combustion and emission factors values are seen with the change of the injector placement angle (in the value range used in this study).
Źródło:
Combustion Engines; 2018, 57, 2; 19-29
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Slime mould games based on rough set theory
Autorzy:
Pancerz, K.
Schumann, A.
Powiązania:
https://bibliotekanauki.pl/articles/331200.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
slime mould game
Physarum machine
transition system
rough set theory
simulation software
system przejściowy
teoria zbiorów przybliżonych
oprogramowanie symulacyjne
Opis:
We define games on the medium of plasmodia of slime mould, unicellular organisms that look like giant amoebae. The plasmodia try to occupy all the food pieces they can detect. Thus, two different plasmodia can compete with each other. In particular, we consider game-theoretically how plasmodia of Physarum polycephalum and Badhamia utricularis fight for food. Placing food pieces at different locations determines the behavior of plasmodia. In this way, we can program the plasmodia of Physarum polycephalum and Badhamia utricularis by placing food, and we can examine their motion as a Physarum machine—an abstract machine where states are represented as food pieces and transitions among states are represented as movements of plasmodia from one piece to another. Hence, this machine is treated as a natural transition system. The behavior of the Physarum machine in the form of a transition system can be interpreted in terms of rough set theory that enables modeling some ambiguities in motions of plasmodia. The problem is that there is always an ambiguity which direction of plasmodium propagation is currently chosen: one or several concurrent ones, i.e., whether we deal with a sequential, concurrent or massively parallel motion. We propose to manage this ambiguity using rough set theory. Firstly, we define the region of plasmodium interest as a rough set; secondly, we consider concurrent transitions determined by these regions as a context-based game; thirdly, we define strategies in this game as a rough set; fourthly, we show how these results can be interpreted as a Go game.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 531-544
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of a Container Terminal and it’s Reflect on Port Economy
Autorzy:
Elentably, A.
Powiązania:
https://bibliotekanauki.pl/articles/116308.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
container terminal
port economy
simulation of a container terminal
discrete event simulation (DES)
port simulation software (PORTSIM)
handling equipment
mobile harbour crane (MHC)
gantry crane (GC)
Opis:
The combination between the design and project of container terminals and the reflect on port’s economy may be carried out through two main approaches: optimization or simulation. Although the approaches based on optimization models allow a more elegant and compact formulation of the problem, simulation models are mainly based on discrete event simulation (DES) models and help to achieve several aims: then measure this impact on port economy before and after implemented this updating overcome mathematical limitations of optimization approaches, support and make computer-generated strategies/policies more understandable, and support decision makers in daily decision processes through a “what if” approach. Several applications of DES models have been proposed and simulation results confirm that such an approach is quite effective at simulating container terminal operations. Most of the contributions in the literature develop object oriented simulation models and pursue a macroscopic approach which gathers elementary handling activities (e.g. using cranes, reach stackers, shuttles) into a few macro-activities (e.g. unloading vessels: crane-dock-reach stacker-shuttle-yard), simulate the movement of an “aggregation” of containers and therefore do not take into account the effects of container types (e.g. 20’ vs 40’, full vs empty), the incidence of different handling activities that may seem similar but show different time duration and variability/dispersion (e.g. crane unloading a container to dock or to a shuttle) and the differences within the same handling activity (e.g. stacking/loading/unloading time with respect to the tier number). Such contributions primarily focus on modeling architecture, on software implementation issues and on simulating design/real scenarios. Activity duration is often assumed to be deterministic, and those few authors that estimate specific stochastic handling equipment models do not clearly state how they were calibrated, what data were used and what the parameter Values are. Finally, no one investigates the effects of different modeling hypotheses on the simulation of container terminal performances. The focus of this paper is on the effects that different hypotheses on handling equipment models calibration may have on the simulation (discrete event) of container terminal performances. Such effects could not be negligible and should be investigated with respect to different planning horizons, such as strategic or tactical. The aim is to propose to analysts, modelers and practitioners a sort of a guideline useful to point out the strengths or weaknesses of different approaches. Drawing on the model architecture which will be affected on port economics.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 331-337
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Software for Occupational Health and Safety Risk Analysis Based on a Fuzzy Model
Autorzy:
Stefanovic, M.
Tadic, D.
Djapan, M.
Macuzic, I.
Powiązania:
https://bibliotekanauki.pl/articles/90031.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
risk assessment
uncertainty
fuzzy model
software simulation
occupational health and safety
Opis:
Risk and safety management are very important issues in healthcare systems. Those are complex systems with many entities, hazards and uncertainties. In such an environment, it is very hard to introduce a system for evaluating and simulating significant hazards. In this paper, we analyzed different types of hazards in healthcare systems and we introduced a new fuzzy model for evaluating and ranking hazards. Finally, we presented a developed software solution, based on the suggested fuzzy model for evaluating and monitoring risk.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 127-136
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of more efficient use of simulation tools in enterprise logistics
Autorzy:
Hegedüš, M.
Fedorko, G.
Beluško, M.
Hlatká, M.
Fábera, P.
Neradilová, H.
Powiązania:
https://bibliotekanauki.pl/articles/102315.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
simulation
logistics
software
efficiency
modelling
Opis:
Computer simulation, as a powerful scientific and engineering tool, is increasingly used to solve a wide range of issues within the enterprise logistics processes. This trend is mainly due to the fact that the computer simulation method offers a whole range of benefits for enterprise logistics e.g. saving time, space and finance. The use of computer simulation in logistics, however, still has certain limitations that handicap it and do not allow it to be more operationally exploited. The main reason is that the creation of models of different logistics processes is exacting on the skills and knowledge in this area. The factors as the difficulty of creating new and modifying existing models or repeating simulation experiments complicate the more frequent application of computer simulation models in logistics. For this reason, it is necessary to look for a way to simplify and make the issue available to a larger circle of users.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 189-197
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation efficiency analysis method of Java Enterprise Edition application
Autorzy:
Górski, T.
Powiązania:
https://bibliotekanauki.pl/articles/1396868.pdf
Data publikacji:
2008
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
software engineering
simulation
enterprise applications
performance
Opis:
In this article efficiency analysis method of Java EE applications was presented. Efficiency's measures of such kind of applications were described. Furthermore, discrete-event simulation modelling method Event Graph and implementation of proposed model in Java and SimKit package was presented. In the paper, a project of simulation application was also described. The article encompasses description of simulation experiment used in efficiency analysis of Java EE application and example of results from such experiment.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2008, 2; 21-29
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a new software of electromagnetic lenses (CADTEL)
Autorzy:
Hasan, H.S.
Powiązania:
https://bibliotekanauki.pl/articles/411585.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Electron lenses
Objective and projector properties
Lenses aberrations
Electron optics
Charged particle optics
Software and simulation in electron lenses
Opis:
The Computer Aided designing Tools for Electromagnetic Lenses (CADTEL) is a new software as application package of programs concept to aid both users and professionals in symmetric and asymmetric electromagnetic lenses with single, double, and multipole piece in electron microscope of electron optics field. The CADTEL software has been designed to run on several computer platforms and includes two types of design procedure. The first one named, analysis procedure (which is based on trial and error) where consist of three sorts called; H1 programs for magnetic scalar potential by solving Laplace's equation [1, 2], H2 and H3 programs for magnetic vector potential by solving Poisson's equation [3, 4] in linear and non linear media respectively. While the second part, named H4 programs for the synthesis procedure (inverse design). The previous types differ by the obtaining the magnetic flux density, and poles shape, while it is analog by compute and plot the lens properties which are operating at zero, low, high, and infinite magnification conditions (operation modes). CADTEL software consist of computational and plot steps of magnetic field, equipotential surfaces, flux lines, objective and projector properties, and poles shape for proposed lens design which are appear in auto visual interfaces, that are coded in visual basic language [5].
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 4; 46-55
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fire And Smoke Simulation Software For Fire Security Scenarios
Autorzy:
Orinčák, Michal
Müllerová, Jana
Powiązania:
https://bibliotekanauki.pl/articles/1832624.pdf
Data publikacji:
2017
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
fire simulation
software
FDS
Smokeview
Smartfire
flood
scenarios
Opis:
Current software systems address modelling and simulation of fire in various environments and conditions. They allow you to test various fire scenarios and model their course and consequences. They are able to detect the possible risks and circumstances that can lead to the damage and to prevent or limit the consequences of potential future fires. Based on fire tests and experiments, new tools and means have been developed to gather the necessary information on fires. Such a means is computer fire simulation. They are based on empirical and scientific knowledge and are comparable to real fire experiments. The great advantage of fire simulations is the non-destructiveness of materials and greater flexibility of use. The complexity of spatial geometry, the mathematical difficulty of solving differential equations, and the demands on computer performance, often include the complexities of fire modelling, but simulation currently allows fairly accurate prediction of the spread of fire and has become an important part of improving fire safety. Fundamental programs such as FDS, Smokeview and Smartfire are introduced as well as flood simulator developed in Czech Republic.
Źródło:
Security Dimensions; 2017, 23(23); 116-130
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
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