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Wyszukujesz frazę "heterogeneous system" wg kryterium: Temat


Tytuł:
An adaptive multi-spline refinement algorithm in simulation based sailboat trajectory optimization using onboard multi-core computer systems
Autorzy:
Dębski, R.
Powiązania:
https://bibliotekanauki.pl/articles/331021.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
dynamic programming
black-box optimization
heterogeneous computing
micro HPC platform
cubic Hermite splines
programowanie dynamiczne
obliczenia heterogeniczne
system komputerowy
Opis:
A new dynamic programming based parallel algorithm adapted to on-board heterogeneous computers for simulation based trajectory optimization is studied in the context of “high-performance sailing”. The algorithm uses a new discrete space of continuously differentiable functions called the multi-splines as its search space representation. A basic version of the algorithm is presented in detail (pseudo-code, time and space complexity, search space auto-adaptation properties). Possible extensions of the basic algorithm are also described. The presented experimental results show that contemporary heterogeneous on-board computers can be effectively used for solving simulation based trajectory optimization problems. These computers can be considered micro high performance computing (HPC) platforms—they offer high performance while remaining energy and cost efficient. The simulation based approach can potentially give highly accurate results since the mathematical model that the simulator is built upon may be as complex as required. The approach described is applicable to many trajectory optimization problems due to its black-box represented performance measure and use of OpenCL.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 351-365
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of HM-networks with positive and negative heterogeneous requests for finding memory volume in information systems
Autorzy:
Matalytski, Mikhail
Zajac, Pawel
Kopats, Dmitry
Powiązania:
https://bibliotekanauki.pl/articles/1839809.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
HM-network
information systems
volumes of requests
positive heterogeneous request
negative heterogeneous request
sieć HM
sieć kolejkowa
system informacyjny
pojemność pamięci
Opis:
To determine the memory volume of information systems (IS), it was proposed to use a stochastic model, based on the use of a queueing network with bypasses, known as an HM-network. This model includes the servicing of heterogeneous requests along with their volumes, the ability to change the volume of such requests with their passage of time and the possibility of finding computer viruses in them, and therefore servicing requests can be interrupted at some random time. The expressions were obtained for the expected total values of the volume of requests in IS nodes.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 67-77
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of HM-networks with positive and negative heterogeneous requests for finding memory volume in information systems
Autorzy:
Matalytski, Mikhail
Zajac, Pawel
Kopats, Dmitry
Powiązania:
https://bibliotekanauki.pl/articles/122732.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
HM-network
information systems
volumes of requests
positive heterogeneous request
negative heterogeneous request
sieć HM
sieć kolejkowa
system informacyjny
pojemność pamięci
Opis:
To determine the memory volume of information systems (IS), it was proposed to use a stochastic model, based on the use of a queueing network with bypasses, known as an HM-network. This model includes the servicing of heterogeneous requests along with their volumes, the ability to change the volume of such requests with their passage of time and the possibility of finding computer viruses in them, and therefore servicing requests can be interrupted at some random time. The expressions were obtained for the expected total values of the volume of requests in IS nodes.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 67-77
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of an Adaptive Scheduling Algorithm for a Warp Knitting Machine Industrial Wireless Network Based on Fuzzy Control
Projekt adaptacyjnego algorytmu planowania dla osnowarki oparty na teorii zbiorów rozmytych
Autorzy:
Wen, Xia
Lai, Sencai
Ren, Wen
Powiązania:
https://bibliotekanauki.pl/articles/1419811.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
warp knitting machine
wireless networked control system
heterogeneous system integration
maszyna dziewiarska
osnowarka
bezprzewodowy system sterowania
integracja systemu
system heterogeniczny
Opis:
Aiming at resolving the technical bottlenecks existing in current warp knitting machine control systems, such as the distributed industrial wireless networked control system, in this study the architecture of a warp knitting machine industrial wireless networked control system based on the WIA-PA international standard is proposed which provides a design idea for building a „smart factory”. Secondly, according to the WIA-PA specification, an allocation plan of time slots in a super-frame for intra-cluster and inter-cluster communication is given. Third, in order to enhance the real-time access of equipment, expand the network capacity, and reduce the energy consumption of the system, based on the carrier sense multiple access (CSMA) mechanism supported by IEEE STD 802.1 5.4:2006, an adjustment algorithm of the super-frame structure based on fuzzy control was designed. The effectiveness of the design method was verified by simulation.
Mając na celu rozwiązanie technicznych wąskich gardeł istniejących w obecnych systemach sterowania maszynami do dziania osnowowego zaproponowano projekt adaptacyjnego algorytmu planowania dla osnowarki oparty na teorii zbiorów rozmytych spełniający wymagania międzynarodowego standardu WIA-PA. Skuteczność metody projektowania zweryfikowano za pomocą symulacji.
Źródło:
Fibres & Textiles in Eastern Europe; 2021, 2 (146); 75-80
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of quality of heterogeneous mechanical systems using impedance method
Autorzy:
Volkovas, V.
Gulbinas, R.
Slavickas, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/329300.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka
jakość
impedancja
metoda
heterogeneous mechanical system
quality
impedance
diagnostics
Opis:
The paper analyzes methodology for investigation of dynamic characteristics of heterogeneous systems: honeycomb optical tables and pipelines with sediments, applying mechanical impedance. The developed methodology may be used to assess the quality of plate or cylindrical heterogeneous structures, according to the dynamic characteristics and parameters established in the methodology. It was shown that impedance characteristics are informative to determine some parameters of the quality of honeycomb optical tables and are correlated with the thickness of the pipe's inner sediment layer. Therefore it is possible to choose typical resonance frequencies and according to their changes, the decision about inner layer presence and its value can be made.
Źródło:
Diagnostyka; 2008, 3(47); 83-88
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Signaling System Performance on QoE in Next Generation Networks
Autorzy:
Batalla, J. M.
Śliwiński, J.
Tarasiuk, H.
Burakowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/308179.pdf
Data publikacji:
2009
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
call setup delay
class of service
heterogeneous networks
next generation networks
quality of experience
quality of service
signaling system
Opis:
The first experience of quality by multimedia applications' users takes place during the setup phase of a new connection. If the setup phase is not accepted or "slowly accepted", the confidence of the user decreases. The user becomes more sensitive when he/she pays the connections with assured quality of service (QoS). In this case, the process of call request should be also accomplished with QoS guarantees. This paper presents the signaling sub-system implemented within the EuQoS system. The EuQoS signaling process follows main assumptions of next generation networks (NGN) architecture and performs tasks related with codec agreement between multimedia end users, admission control and resource reservation functions. In this paper, we present analytical, simulation and experimental results showing the impact of signaling system performance on quality of experience (QoE) for the potential users of multi-layer EuQoS system. In particular, the presented approach aims at ensuring user QoE of the connection setup phase by ensuring QoS for transferring signaling messages by the network.
Źródło:
Journal of Telecommunications and Information Technology; 2009, 4; 124-137
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maintenance problems of technical systems composed of heterogeneous elements
Autorzy:
Jodejko, A.
Powiązania:
https://bibliotekanauki.pl/articles/2069556.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
multi-unit system
heterogeneous system
block maintenance policy
economic dependency
Opis:
The paper gives a short insight into the complexity of maintenance problems of a system composed of heterogeneous elements. The article proposes a simple algorithm to define parameters of block maintenance policy of multi-unit systems composed of elements with economic dependency. The procedure may be used especially in the case when elements of a system are not identical in the sense of their probability characteristics and analytical solution is inaccessible.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 187--193
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda wymiany informacji między heterogenicznymi systemami symulacji oraz wspomagania decyzji w systemach reagowania kryzysowego
The method of data exchanging between simulation and decision support modules in crisis management systems
Autorzy:
Pierzchała, D.
Powiązania:
https://bibliotekanauki.pl/articles/404198.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Symulacji Komputerowej
Tematy:
wymiana danych
systemy wspomagania symulacji
systemy wspomagania decyzji
system heterogeniczny
systemy reagowania kryzysowego
data exchange
simulation support modules
decision support modules
heterogeneous system
crisis management systems
Opis:
Opracowanie prezentuje propozycję integratora heterogenicznych systemów rozproszonych wspomagania decyzji i symulacji, w tym zgodnych ze standardem HLA. Proponowana metoda zakłada wykorzystanie Usługi Sieciowej dostępnej poprzez sieć lokalną lub Internet. Jako platformę integracyjną wykorzystano Framework Mule, realizujący koncepcję magistrali ESB.
The article presents the framework and method of data exchanging between simulation and decision support modules in crisis management systems. The attention is focused on IEEE 1516 (High Level Architecture - HLA). This work also supports reusability of legacy simulations by new direction: HLA integrated with SOA (Service Oriented Architecture). The framework Mule has been used as an integrator.
Źródło:
Symulacja w Badaniach i Rozwoju; 2010, 1, 2; 173-181
2081-6154
Pojawia się w:
Symulacja w Badaniach i Rozwoju
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
M/G→ /n/0 Erlang queueing system with heterogeneous servers and non-homogeneous customers
Autorzy:
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/199840.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multi-server queueing systems
queueing systems with non-homogeneous customers
queueing systems with heterogeneous servers
total volume distribution
Laplace–Stieltjes transform
system kolejkowania
transformata Laplace'a-Stieltjesa
dystrybucja
Opis:
In the present paper, we investigate a multi-server queueing system with heterogeneous servers, unlimited memory space, and non-homogeneous customers. The arriving customers appear according to a stationary Poisson process. Service time distribution functions may be different for every server. Customers are additionally characterized by some random volume. On every server, the service time of the customer depends on their volume. The number of customers distribution function is obtained in the classical model of the system. In the model with non-homogeneous customers, the stationary total volume distribution function is determined in the term of Laplace–Stieltjes transform. The stationary first and second moments of a total customers volume are calculated. An analysis of some special cases of the model and some numerical examples are also included.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 59-66
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi–server loss queueing system with random volume customers, non–identical servers and a limited sectorized memory buffer
Autorzy:
Ziółkowski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/27311432.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
multi–server queueing system with heterogeneous servers
queueing systems with random volume customers
sectorized memory buffer
loss probability
Stieltjes convolution
wieloserwerowy system kolejkowy z serwerami heterogenicznymi
prawdopodobieństwo straty
splot Stieltjesa
bufor pamięci sektorowany
system kolejkowy z losowymi klientami
Opis:
In the present paper, the model of multi–server queueing system with random volume customers, non–identical (heterogeneous) servers and a sectorized memory buffer has been investigated. In such system, the arriving customers deliver some portions of information of a different type which means that they are additionally characterized by some random volume vector. This multidimensional information is stored in some specific sectors of a limited memory buffer until customer ends his service. In analyzed model, the arrival flow is assumed to be Poissonian, customers’ service times are independent of their volume vectors and exponentially distributed but the service parameters may be different for every server. Obtained results include general formulae for the steady–state number of customers distribution and loss probability. Special cases analysis and some numerical computations are attached as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e146764
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear system identification using heterogeneous multiple models
Autorzy:
Orjuela, R.
Marx, B.
Ragot, J.
Maquin, D.
Powiązania:
https://bibliotekanauki.pl/articles/330794.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
nonlinear system identification
multiple model
heterogeneous submodel
układ nieliniowy
model wielokrotny
podmodel heterogeniczny
Opis:
Multiple models are recognised by their abilities to accurately describe nonlinear dynamic behaviours of a wide variety of nonlinear systems with a tractable model in control engineering problems. Multiple models are built by the interpolation of a set of submodels according to a particular aggregation mechanism, with the heterogeneous multiple model being of particular interest. This multiple model is characterized by the use of heterogeneous submodels in the sense that their state spaces are not the same and consequently they can be of various dimensions. Thanks to this feature, the complexity of the submodels can be well adapted to that of the nonlinear system introducing flexibility and generality in the modelling stage. This paper deals with off-line identification of nonlinear systems based on heterogeneous multiple models. Three optimisation criteria (global, local and combined) are investigated to obtain the submodel parameters according to the expected modelling performances. Particular attention is paid to the potential problems encountered in the identification procedure with a special focus on an undesirable phenomenon called the no output tracking effect. The origin of this difficulty is explained and an effective solution is suggested to overcome this problem in the identification task. The abilities of the model are finally illustrated via relevant identification examples showing the effectiveness of the proposed methods.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 1; 103-115
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time emissions of gaseous pollutants from vehicles under heterogeneous traffic conditions
Autorzy:
Goyal, Yuvraj
Meena, Sanu
Singh, Suresh Kumar
Kulshrestha, Mukul
Powiązania:
https://bibliotekanauki.pl/articles/27311334.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
real-world driving emissions
portable emission measurement system
heterogeneous traffic condition
rzeczywiste emisje podczas jazdy
przenośny system pomiaru emisji
niejednorodne warunki ruchu drogowego
Opis:
Air quality problems in cities are often a cause for worry. The air quality index is increasing daily, leading to an increase in cancer and many respiratory problems. Road transport in an urban area is a significant cause of air pollution. The vehicles must meet Indian emission regulations for which the emissions are measured using legally mandated standard driving cycles that did not accurately reflect real-world driving emissions because of varying traffic conditions, meteorological conditions, driving behaviour, vehicle power, performance, etc. This study focuses on real-time emissions of gaseous pollutants hydrocarbon (HC), carbon dioxide (CO2), carbon monoxide (CO), and nitric oxide (NO) from vehicle exhaust pipes under heterogeneous traffic conditions. The emissions were measured using a Portable Emission Measurement System (PEMS). The PEMS used was an AVL MDS 450 analyser mounted on the vehicle, and onroad emissions were captured. The test sample consists of four passenger vehicles with varying engine sizes, manufacturers, and fuel. The test route comprises city and highway areas, and it was discovered that the emissions were reduced by 40 to 70% on highways compared to the city. In petrol BSIV and BSVI engines, the emission was reduced to 41.73% for CO, 46.90% for HC, and 64% for NO in the city area. Speed and emissions scatter graphs were plotted for the vehicles, and it was found that in the city area, the optimum speed for less emission is between 30-40 km/h, and on highways, the optimum speed is 80-90 km/h. The emissions were also sensitive to the rate and frequency of acceleration and decelerations. This type of study is very limited in India, and more such studies are required for the assessment of air quality in metropolitan areas and successful traffic management strategies, as well as for determining instantaneous projections of pollutant emissions.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2023, 118; 55--75
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozkład koncentracji składników podczas mieszania funnel-flow z systemem RSI
Distribution of component concentration in funnel-flow mixing within RSI system
Autorzy:
Matuszek, D.
Tukiendorf, M.
Powiązania:
https://bibliotekanauki.pl/articles/287551.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
system funnel-flow
ziarnista mieszanina niejednorodna
komputerowa analiza obrazu
funnel-flow system
granular heterogeneous mixture
computer image analysis
Opis:
W pracy przedstawiono wyniki badań prowadzonych przy użyciu mieszalnika do systemu funnel-flow. Mieszaniu poddano niejednorodne dwuskładnikowe układy ziarniste o stałym stosunku średnicy ziaren i różnym stosunku gęstości. W procesie zastosowano wkładki wspomagające w postaci elementów systemu Roof Shaped Insert. Wykorzystano stożki o tym samym kącie rozwarcia i dwóch różnych wymiarach średnicy. W trakcie prowadzonych badań dokonywano zasadności użycia komputerowej analizy obrazu w ocenie koncentracji obserwowanych składników. Uzyskane wyniki przedstawiono w sposób graficzny.
The paper presents results of tests conducted with use of mixer for funnel-flow system. Heterogeneous two component granular materials, characterized by a constant related proportion of grain diameters and varying concentration ratios, were mixed together. Roof Shaped Insert system components, such as mix assisting inserts were used in the process. Cones having the same obtuse angle and two various diameter sizes were used for the experiment. Computer analysis of the image was conducted during the experiments in order to evaluate concentration of observed components. The results were presented in a chart.
Źródło:
Inżynieria Rolnicza; 2007, R. 11, nr 6 (94), 6 (94); 159-166
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method of automatic summarization from different sources
Autorzy:
Shakhovska, N.
Cherna, T.
Powiązania:
https://bibliotekanauki.pl/articles/411243.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
annotation
abstracting
national system of abstracting
heterogeneous data
analysis
Opis:
In this article is analyzed technology of automatic text abstracting and annotation. The role of annotation in automatic search and classification for different scientific articles is described. The algorithm of summarization of natural language documents using the concept of importance coefficients is developed. Such concept allows considering the peculiarity of subject areas and topics that could be found in different kinds of documents. Method for generating abstracts of single document based on frequency analysis is developed. The recognition elements for unstructured text analysis are given. The method of pre-processing analysis of several documents is developed. This technique simultaneously considers both statistical approaches to abstracting and the importance of terms in a particular subject domain. The quality of generated abstract is evaluated. For the developed system there was conducted experts evaluation. It was held only for texts in Ukrainian. The developed system concluding essay has higher aggregate score on all criteria. The summarization system architecture is building. To build an information system model there is used CASE-tool AllFusion ERwin Data Modeler. The database scheme for information saving was built. The system is designed to work primarily with Ukrainian texts, which gives a significant advantage, since most modern systems still oriented to English texts.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 1; 103-109
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Układy homo- i heterogeniczne w biodegradacji lotnych związków organicznych
Homo- and heterogeneous systems in VOCs biodegradation
Autorzy:
Trusek-Hołownia, A.
Powiązania:
https://bibliotekanauki.pl/articles/2070396.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
związki organiczne lotne
biodegradacja
układ heterogeniczny
bioreaktor
ekstrakcja
volatile organic compounds
biodegradation
heterogeneous system
bioreactor
extraction
Opis:
Na podstawie przeprowadzonych badań, w oparciu o współczynnik podziału przedstawiono podział lotnych związków organicznych na trzy grupy. Dla wybranych związków z każdej grupy, po dobraniu szczepu mikroorganizmu, zaproponowano rozwiązanie procesowe dla efektywnej biodegradacji. Procesy takie prowadzone są bądź w układach homogenicznych, bądź też w układach, w których drugą fazę ciekłą stanowi ciecz absorbująca lub sam biodegradowany związek.
On the basis of performed experiments VOCs are divided into three groups with regard to the values of the partition coefficient. For selected components from each group and with the use of relevant microorganism, the process solution for effective biodegradation was proposed. These processes were carried out either in homogeneous systems or in systems with the second liquid phase being the absorption phase or degraded compound itself.
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 3; 117-118
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł

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