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Wyszukujesz frazę "Feliziani, S." wg kryterium: Wszystkie pola


Tytuł:
Vehicular flow simulators based on complex queuing systems
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955296.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska
Tematy:
traffic systems
queueing network
modeling and simulation
Opis:
The crux of this paper is to demonstrate how it is possible to model systems of vehicular trafic by means of complex queuing network models. The objects comprising the library that we define in this work all follow the approach whereby they are composed of one or more queuing networks of service systems that are traversed by customers (vehicles).
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2013, 17, 3-4; 155--180
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulators of VOIP traffic in P2P networks
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1943203.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska
Tematy:
traffic simulators
queuing networks
P2P networks
VOIP traffic
Opis:
This study is included in a research programme developed by the authors at the University of Studies in Camerino for the construction of traffic flow simulators in computer and telecommunication networks [1–4]. The article contains the definition of a library of object types whose architecture is based on the queue networks, for a simulation of the VOIP traffic in P2P networks. Basing on this library, we simulate the traffic in a P2P network that is locally implemented with three different technology types: 1. Fast Ethernet, 2. Wireless, 3. ADSL2+. In this context, we simulate traffic flows due to file-sharing applications in the network and due to voice communications through the VOIP technology. Thus, we evaluate the impact of the VOIP traffic for procedures of file-sharing in a P2P network.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2009, 13, 4; 315-345
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphical application for the construction of a simulator of urban vehicular traffic flows
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955303.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska
Tematy:
discrete event simulators
vehicular flows
complex queueing systems
Opis:
One of the most fundamental problems encountered during the construction of a simulator of urban vehicular traffic flows concerns the method of gathering the data describing the real system. In this paper, we present a graphical application developed for AutoCAD. This application allows to process the images of a vehicular traffic system in AutoCAD. During the graphical processing performed by means of our application, a file describing the system is generated. This file is subsequently read by a procedure which generates the simulator of the system. The images of the traffic system can be acquired by means of several applications available on the Internet, such as Google Maps, Google Earth, Bing, etc. Performing image processing in the context of AutoCAD allows to consistently handle distance measurements in the system, and, in general, to address the problems related to the scale ratios of an image.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2010, 14, 4; 405-430
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Networks of queues for the simulation of urban flow systems: an intermodal traffic system
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955697.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
traffic simulation
traffic engineering
queuing network simulation
Opis:
In this paper we introduce a queueing network model, which can be used to simulate the behaviour of specific traffic systems in an urban context. The frame of the work is that of road automation and traffic system control by queue based models simulation.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 1; 121-130
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of queue-based simulators for web applications distributed on computer networks
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1964158.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska
Tematy:
queuing systems
web-distributed applications
computer networks simulation
communication systems
web interaction paradigms
Opis:
Modern Internet and web applications involve interactions among remote host computers connected by communication networks. Simulation modelling is an important technique to evaluate performance in the implementation of a web-distributed application over given networks formed by computer hosts connected by heterogeneous networks. In this paper we extend a previous work concerning the construction of a queue-based simulator of communication networks. We define a set of new queue-based object types which permit us to specify the behaviour of a web-distributed application whose software components run over different hosts in a given communication network. We apply this technique to show how to build a simulator to evaluate the performance of various software architectures for a web-distributed application run over a given computer network.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2005, 9, 4; 373-396
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method to build network-of-queues-based simulators for communication systems
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1954090.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
queuing systems
computer simulation
communication systems
Opis:
In this study we build a library of new object types whose architecture is based on models of networks-of-queues to simulate communication networks. We also define a class of procedures to automatically generate a simulator of a generic communication network described by the library's objects.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 3; 333-358
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queue-based simulators of P2P networks
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1933180.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska
Tematy:
computer science engineering
queuing system networks
computer networks simulation
communication system protocols
voice over IP networks
Opis:
A technique is introduced for the construction of simulators of telecommunication networks based on the P2P protocol with a decentralized directory. The context of the application concerns P2P networks used both by sharing software and by telecommunication applications, as in VoIP applications. P2P systems have the advantages of boundless scalability and the break-up insensibility of devices, but suffer from heavy traffic of signals and network delays. Therefore, simulation of signal traffic in P2P networks is an important issue. The technique we have developed enables individuation of a generic P2P network's components and their functional characterization. We have worked at this level of description in order to determine the architecture of every component as a model of queues' networks. We have therefore defined a library of new types of objects for the construction of P2P network simulators with the Qnap2.V9 programming language. In this context, we have defined a procedure automatically generating the simulator of an any P2P network. During its execution, the procedure reads data from a file containing a description of the structure of the considered P2P network and values of the characteristic parameters of its components. Results related to the simulation of three configurations of a P2P network are introduced in Section 5 below. They differ according to the technology used to realize the local interconnection networks. The context of the present paper is a research program developed at the University of Camerino in defining specific computer procedures aimed at construction of simulators of telecommunication and computing networks. This technique also enables simulation of the software elaboration phases on computer networks and evaluation of the impact of specific choices concerning the structure of transmission protocols and operation paradigms of software applications [1, 2].
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2007, 11, 3; 203-235
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of road systems and queuing network models
Autorzy:
Pasini, L.
Feliziani, S.
Giorgi, M.
Powiązania:
https://bibliotekanauki.pl/articles/1964157.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska
Tematy:
queue systems
vehicular traffic systems
computer networks simulation
Opis:
The purpose of this paper is to describe the versatility of queuing network systems for modelling vehicular traffic flows in road systems. These techniques are applicable in a simulation context because of the complexity of the resulting models, which can not be solved by mathematical analytical solvers. Moreover, these techniques can be used to model and simulate the behaviour of an automatic control system of vehicular flow in the same frame.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2005, 9, 4; 397-408
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model angular distribution functions in CA3, CA4 and CA6 structural units of glassy systems
Autorzy:
Bergmański, G.
Feliziani, S.
Rybicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1933172.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska
Tematy:
structure of matter
disordered systems
short-range order
stochastic geometry
Opis:
We have calculated model partial angular distribution functions (pADFs) in CA3, CA4 and CA6 structural units, i. e. an equilateral triangle with three vertical anions, A, and a central cation, C, a regular tetrahedron with four vertical anions, A, and a central cation, C and a square bipyramid with six vertical anions, A, and a central cation, C. The model pADFs were calculated employing a simple Monte Carlo procedure: the ions were being shifted at random within 3D spheres of radius r with uniform probability density and the AAA, ACA and CAA angles were calculated for each random configuration. Repeating the calculation 10(8) - 10(9) times produced smooth probability densities for the angles' values. Conventional reference data so obtained can be applied to estimate the overall degree of deformation of the considered structural units in numerically simulated materials.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2007, 11, 3; 185-195
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The structure of Pb-PbO-SiO2 glass via molecular dynamics simulation
Autorzy:
Rybicki, J.
Witkowska, A.
Bergmański, G.
Mancini, G.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1954650.pdf
Data publikacji:
2022-01-20
Wydawca:
Politechnika Gdańska
Tematy:
lead-silicate glasses
oxide glasses
medium-range order
ring analysis
molecular dynamics simulations
Opis:
The paper is dedicated to a molecular dynamics (MD) study of the structure of partially reduced lead-silicate glass of composition 1Pb 1PbO 1SiO2. The simulations have been performed in the constant volume regime, using a two-body potential (Born-Mayer repulsive forces, and Coulomb forces due to full ionic charges). The system was initially prepared as a well equilibrated hot melt, and then slowly cooled down to 300K. The information on short-range correlations were obtained in a conventional way (from pair and angular distribution functions), while the medium-range order was studied via cation-anion ring analysis. In the paper, the short- and medium-range order in the simulated system is discussed and compared with the structure of a glassy completely reduced system, i.e. 2Pb 1SiO2 and unreduced one, i.e. 2PbO 1SiO2 glass.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 2; 243-256
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł

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