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Wyświetlanie 1-15 z 22
Tytuł:
Analysis of distributed systems dynamics with Erlang Performance Lab
Autorzy:
Ślaski, M.
Turek, W.
Gil, A.
Szafran, B.
Paciorek, M.
Byrski, A.
Powiązania:
https://bibliotekanauki.pl/articles/305613.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
software engineering
distributed computing and simulation
distributed systems monitoring
Opis:
Modern, highly concurrent, and large-scale systems require new methods for design, testing, and monitoring. Their dynamics and scale require real-time tools that provide a holistic view of the whole system and the ability to show a more detailed view when needed. Such tools can help identify the causes of unwanted states, which is hardly possible with a static analysis or metrics-based approach. In this paper, a new tool for the analysis of distributed systems in Erlang is presented. It provides the real-time monitoring of system dynamics on diferent levels of abstraction. The tool has been used for analyzing a large-scale urban trafic simulation system running on a cluster of 20 computing nodes.
Źródło:
Computer Science; 2018, 19 (2); 139-155
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sampling Designs Proportionate to Non-negative Functions of two Quantiles of Auxiliary Variable
Autorzy:
Wywiał, Janusz L.
Powiązania:
https://bibliotekanauki.pl/articles/591108.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody estymacji
Regresja kwantylowa
Statystyka
Symulacje komputerowe
Computing simulation
Estimation methods
Quantile regression
Statistics
Opis:
Estimation of the population average in a finite population by means of sampling strategies dependent on sample quantiles of an auxiliary variable are considered. The sampling design proportional to an order statistic of an auxiliary variable was defined by Wywiał (2007, 2008). It was generalized into case of the sampling design proportional to the difference of two order statistics by Wywiał (2009), too. In this paper those results are generalized on the case of a conditional sampling design. Several strategies including the Horvitz-Thompson statistic and regression estimators are considered. Their accuracy is analyzed on the basis of computer simulation experiments.
Źródło:
Studia Ekonomiczne; 2013, 152; 175-190
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The real-time simulation of an electric systems – the simulation stability
Autorzy:
Fajfer, M.
Powiązania:
https://bibliotekanauki.pl/articles/97232.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
simulator working in real-time
DSP processor
multicore system
concurrent computing simulation of electrical system
Opis:
The paper presents the results of a research of the impact of numerical integration algorithm and the method of solving the system of linear equations for the stability of the simulation of electric circuit in steady states and transient states. Stability criteria was explained. Mathematical modeling algorithm of the electric power line (steady states and transient states) was presented with elements of concurrent computing. The goal is to create a mathematical model of the electric circuit that will meet the requirements of the models used in simulators working in real time.
Źródło:
Computer Applications in Electrical Engineering; 2015, 13; 65-76
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
European Quantum Strategy : Global and Local Consequences
Autorzy:
Romaniuk, Ryszard S.
Powiązania:
https://bibliotekanauki.pl/articles/2203001.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
QIT quantum information technologies
quantum computing and simulation
communications
sensors
metrology
European Quantum Flagship
Opis:
Europe has to face strong competitive challenges in the field of QIT from other regions of the world. The tools for the effective implementation of the challenges related to the start, we hope, of building a quantum civilization are both common and individual in particular European countries. Joint projects in the field of QIT, usually narrowly focused, are announced by large European Agencies and are related to their activities. Large-scale collaborative projects are of course the domain of the EC. National projects depend heavily on the capabilities of individual countries and vary greatly in size. The most technologically advanced European countries invest hundreds of millions of Euros in national QIT projects annually. The largest European FET class project currently being implemented is the Quantum Flagship. Although the EQF is basically just one of the elements of a large and complicated European scene of development of quantum technologies, it becomes the most important element and, in a sense, a dominant one, also supported from the political level. There are complex connections and feedbacks between the elements of this quantum scene. National projects try to link to the EQF. Here we are interested in such connections and their impact on the effectiveness of QIT development in Europe, and especially in Poland.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 199--206
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weballted : interdisciplinary modeling in grid and cloud
Autorzy:
Zgurovsky, M.
Petrenko, A.
Ladogubets, V.
Finogenov, O.
Bulakhova, B.
Powiązania:
https://bibliotekanauki.pl/articles/305515.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
simulation
grid computing
cloud computing
SOA
web services
Opis:
This paper presents a multi-layered architecture of computer simulation software capable of utilizing grid and cloud resources, characterized in that the functionality of the system is distributed according to a service-oriented approach, and the system supports the execution of custom user-defined computing scenarios in grid or in cloud (by web services orchestration with an adherence to existing standards) but hides the complexity of direct web services management from the user with the help of the abstract workflow model and a web-accessible problem solving environment with a graphical workflow editor.
Źródło:
Computer Science; 2013, 14 (2); 295-306
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of manufacturing and logistics systems for the 21th century
Autorzy:
Palajová, S.
Figa, Š.
Gregor, M.
Powiązania:
https://bibliotekanauki.pl/articles/117896.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
simulation
emulation
metamodelling
cloud computing
Opis:
This paper deals with computer simulation of manufacturing systems. It contains the basic simulation theory and principles of a simulation project management. Furthermore the authors introduced the idea of parametric simulation model, followed by special application areas of simulation, e.g. scheduling, emulation, metamodelling. The paper discusses the possibility to utilize a cloud computing technology in simulation. The case example of the application of simulation by the optimization of real production system concludes the working part of paper. The final part summarizes benefits and recommendations.
Źródło:
Applied Computer Science; 2011, 7, 2; 47-60
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of manufacturing and logistics systems for the 21th century
Autorzy:
Palajová, S.
Figa, S.
Gregor, M.
Powiązania:
https://bibliotekanauki.pl/articles/118003.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
simulation
emulation
metamodelling
cloud computing
Opis:
This paper deals with computer simulation of manufacturing systems. It contains the basic simulation theory and principles of a simulation project management. Furthermore the authors introduced the idea of parametric simulation model, followed by special application areas of simulation, e.g. scheduling, emulation, metamodelling. The paper discusses the possibility to utilize a cloud computing technology in simulation. The case example of the application of simulation by the optimization of real production system concludes the working part of paper. The final part summarizes benefits and recommendations.
Źródło:
Applied Computer Science; 2012, 8, 1; 45-57
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interactive Grid computing: adapting high level architecture-based applications to the Grid
Autorzy:
Rycerz, K.
Bubak, M.
Malawski, M.
Sloot, P.
Powiązania:
https://bibliotekanauki.pl/articles/1964209.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
interactive simulation
grids
grid computing
HLA
OGSA
Opis:
In this paper we present the design of a Grid HLA Management System (GHMS) supporting execution of High Level Architecture-based interactive applications in a Grid environment, while at the same time allowing for running HLA legacy codes to preserve backward compatibility with the HLA standard. In particular, we describe the following system components: an HLA-Speaking Service for multiple federates that interface the HLA application to the system, a Monitoring Service integrated with the OCMG monitoring system and HLA-based Benchmark Services informing the Broker Service of what can be expected from the application's behavior.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 4; 549-559
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Volunteer computing simulation using repast and mason
Autorzy:
Byrski, A.
Feluś, M.
Gawlik, J.
Jasica, R.
Kobak, P.
Jankowski, G.
Nawarecki, E.
Wroczyński, M.
Majewski, P
Krupa, T.
Strychalski, J.
Powiązania:
https://bibliotekanauki.pl/articles/305347.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
volunteer computing
agent-based simulation
RePast
MASON
Opis:
Volunteer environments usually consist of a large number of computing nodes, with highly dynamic characteristics, therefore reliable models for a planning of the whole computing are highly desired. An easy to implement approach to modelling and simulation of such environments May employ agent-based universal simulation frameworks, such as RePast or MASON. In the course of the paper the above-mentioned simulation frame Works are adapter to suport simulation of volunteer computing. After giving implementation details, selected results concerning computing time and speedup are given and are compared with the ones obtained from an actual volunteer environment.
Źródło:
Computer Science; 2013, 14 (1); 153-172
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial Life. Biologically-inspired algorithms
Autorzy:
Komosiński, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/703205.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
artificial life
simulation
biologically-inspired algorithms
evolution
computing
Opis:
This article presents Artificial Life, an interdisciplinary field of study that helps understand life on Earth (life as we know it) and other, possible kinds of life (as it could be). Artificial Life research builds models of life and synthesizes related phenomena and processes in all currently available media – software, hardware and wetware. The first part of this work focuses on Artificial Life as a research field. In the second part, three exemplary computer science algorithms are shown that are inspired by biological processes. These are evolutionary and coevolutionary algorithms, swarm intelligence and ant algorithms, and artificial immune systems. The final part of this work provides a number of reflections on the goals of Artificial Life research, human nature and limitations, and our problems with evaluating complex outcomes of digital life experimentation.
Źródło:
Nauka; 2008, 4
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of a dynamic and intelligent simulator at the infrastructure level of cloud services
Autorzy:
Zegrari, Faouzia
Idrissi, Abdellah
Powiązania:
https://bibliotekanauki.pl/articles/1837371.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
load balancing
cloud computing
resource utilization
dynamic environment simulation
Opis:
Cloud environments made up of a large number of compute and storage servers provide ondemand services in a usage-based consumption model (pay-as-you-go). Load balancing is one of the major problems in the cloud. Indeed, the dynamics of demand requirements and QoS, as well as the variability of cloud resources and its provisioning models make difficult the operation of performance evaluation of the system. To face this issue and to ensure the viability of cloud computing, IT resources must be managed effectively by a dynamic monitoring of the current workload of virtual machines (VMs). In this study, we propose the design of a cloud services simulation tool at the infrastructure level based on cloud computing simulation platform named CloudSim. It allows real-time monitoring of a load of each VM in terms of CPU utilization, memory utilization and bandwidth utilization ratio. The result of this case study can be useful for carry out dynamic environment simulations for VMs monitoring and fast decision making that can be used in load balancing mechanisms.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 3; 65-70
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel GPU-Enabled Simulator for Large Scale Spiking Neural Networks
Autorzy:
Szynkiewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/307680.pdf
Data publikacji:
2016
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
GPU computing
OpenCL programming technology
parallel simulation
spiking neural networks
Opis:
The understanding of the structural and dynamic complexity of neural networks is greatly facilitated by computer simulations. An ongoing challenge for simulating realistic models is, however, computational speed. In this paper a framework for modeling and parallel simulation of biological-inspired large scale spiking neural networks on high-performance graphics processors is described. This tool is implemented in the OpenCL programming technology. It enables simulation study with three models: Integrate-andfire, Hodgkin-Huxley and Izhikevich neuron model. The results of extensive simulations are provided to illustrate the operation and performance of the presented software framework. The particular attention is focused on the computational speed-up factor.
Źródło:
Journal of Telecommunications and Information Technology; 2016, 2; 34-42
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Lattice Boltzmann Method to the flow past a sphere
Autorzy:
Kajzer, A.
Pozorski, J.
Powiązania:
https://bibliotekanauki.pl/articles/281895.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
bluff-body flow
Lattice Boltzmann Method
Large Eddy Simulation
GPU computing
Opis:
The results of fully resolved simulations and large eddy simulations of bluff-body flows obtained by means of the Lattice Boltzmann Method (LBM) are reported. A selection of Reynolds numbers has been investigated in unsteady laminar and transient flow regimes. Computed drag coefficients of a cube have been compared with the available data for validation purposes. Then, a more detailed analysis of the flow past a sphere is presented, including also the determination of vortex shedding frequency and the resulting Strouhal numbers. Advantages and drawbacks of the chosen geometry implementation technique, so called “staircase geometry”, are discussed. For the quest of maximum computational effi- ciency, all simulations have been carried out with the use of in-house code executed on GPU.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 3; 1091-1099
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Virtual Reality and High Performance Computing in Designing Rotary Forming Processes
Autorzy:
Hojny, Marcin
Marynowski, Przemysław
Lipski, Grzegorz
Gądek, Tomasz
Nowacki, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2134109.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rotary forming
virtual reality
finite element
computer simulation
high performance computing
Opis:
This paper presents an innovative solution in the form of a virtual reality (VR) and high performance computing (HPC) system dedicated to aid designing rotary forming processes with laser beam reheating the material formed. The invented method allowing a virtual machine copy to be coupled with its actual counterpart and a computing engine utilizing GPU processors of graphic NVidia cards to accelerate computing are discussed. The completed experiments and simulations of the 316L stainless steel semi-product spinning process showed that the developed VR-HPC system solution allows the manufacturing process to be effectively engineered and controlled in industrial conditions.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1099--1105
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using a vision cognitive algorithm to schedule virtual machines
Autorzy:
Zhao, J.
Mhedheb, Y.
Tao, J.
Jrad, F.
Liu, Q.
Streit, A.
Powiązania:
https://bibliotekanauki.pl/articles/330838.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
cloud computing
vision cognitive algorithm
VM scheduling
simulation
chmura obliczeniowa
algorytm poznawczy
szeregowanie
symulacja
Opis:
Scheduling virtual machines is a major research topic for cloud computing, because it directly influences the performance, the operation cost and the quality of services. A large cloud center is normally equipped with several hundred thousand physical machines. The mission of the scheduler is to select the best one to host a virtual machine. This is an NP-hard global optimization problem with grand challenges for researchers. This work studies the Virtual Machine (VM) scheduling problem on the cloud. Our primary concern with VM scheduling is the energy consumption, because the largest part of a cloud center operation cost goes to the kilowatts used. We designed a scheduling algorithm that allocates an incoming virtual machine instance on the host machine, which results in the lowest energy consumption of the entire system. More specifically, we developed a new algorithm, called vision cognition, to solve the global optimization problem. This algorithm is inspired by the observation of how human eyes see directly the smallest/largest item without comparing them pairwisely. We theoretically proved that the algorithm works correctly and converges fast. Practically, we validated the novel algorithm, together with the scheduling concept, using a simulation approach. The adopted cloud simulator models different cloud infrastructures with various properties and detailed runtime information that can usually not be acquired from real clouds. The experimental results demonstrate the benefit of our approach in terms of reducing the cloud center energy consumption.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 535-550
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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