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Tytuł:
Auditory occupancy grids with a mobile robot
Autorzy:
DeJong, B. P.
Powiązania:
https://bibliotekanauki.pl/articles/384355.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
auditory occupancy grids
sound localization
occupancy grids
mobile robot
Opis:
This paper presents the use of auditory occupancy grids (AOGs) for mapping of a mobile robot’s acoustic environment. An AOG is a probabilistic map of sound source locations built from multiple measurements using techniques from both probabilistic robotics and sound localization. The mapping is simulated, tested for robustness, and then successfully implemented on a threemicrophone mobile robot with four sound sources. Using the robot’s inherent advantage of mobility, the AOG correctly locates the sound sources from only nine measurements. The resulting map is then used to intelligently position the robot within the environment and to maintain auditory contact with a moving target.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 3; 3-12
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance aspects of data delivery using hierarchical storage management systems in the grid
Autorzy:
Nikolow, D.
Słota, R.
Kitowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1964210.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
HSM
grids
time estimation
Opis:
Grid computing has recently gained in popularity. Grid applications can be very demanding of the data storage facilities in the Grid. The existing data grid services are often insufficient and additional optimization of the data access is necessary. This paper presents research concerning the optimization aspects of data management for Hierarchical Storage Management (HSM) systems in the Grid.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 4; 537-548
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dasymetric modelling of population distribution – large data approach
Autorzy:
Dmowska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1051042.pdf
Data publikacji:
2019-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
population grids
dasymetric modelling
R
Opis:
Existing resources of population data, provided by national censuses in the form of areal aggregates, have usually insufficient resolution for many practical applications. Dasymetric modelling has been a standard technique to disaggregate census aggregates into finer grids. Although dasymetric modelling of population distribution is well-established, most literature focuses on proposing new variants of the technique, while only few are devoted to developing broad-scale population grids that could be used for real-life applications. This paper reviews literature on construction of broad-scale population grids using dasymetric modelling. It also describes an R implementation of fully automated framework to calculate such grids from aggregated data provided by national censuses. The presented implementation has been used to produce high resolution, multi-year comparable, U.S.-wide population datasets that are the part of the SocScape (Social Landscape) project.
Źródło:
Quaestiones Geographicae; 2019, 38, 1; 15-27
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On calculations of the dipole moment from the electron density data
Autorzy:
Gryciuk, M.
Górecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1931585.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
electron density
dipole moment
grids
Opis:
In the paper we discuss how to calculate the dipole moment using the electron density data. A few numerical methods are compared. We have found that usually the interpolation of electron density gives the most accurate results.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 4; 661-668
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the operation of earth fault relays by auto earthing-connection at earth fault situations in 6kV mining grid of Quang Ninh
Poprawa działania przekaźników ziemnozwarciowych poprzez automatyczne połączenie uziemiające w sieci górniczej 6kV w Quang Ninh
Autorzy:
Bun, Ho Viet
Thanh, Le Xuan
Powiązania:
https://bibliotekanauki.pl/articles/318091.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
górnictwo
Wietnam
przekaźniki
mining
Vietnam
grids
Opis:
Single phase earth-fault in MV grids usually causes overvoltage that harm to human being and electric equipments. In 6kV mining grids of Vietnam, earth fault which is majority incident accounts 55% to 73% of the total faults. When earth fault occurs many grids’ eco-technical parameters will be affected. Moreover, the overvoltage and earthing current can lead to serious electric shock accidents caused mainly by stepping-overvoltage or touching-overvoltage. One of earthing relays requirements is to trip in minimum time duration in order to reduce the magnitude of earthing currents and overvoltage. Base on the simulation in Matlab, the paper suggests a prior connection diagram that allows an auto earthing-connection for improving the better performance of relays. The utilization of the diagram will help to decrease the tripping time of relays, reduce the amplitude of internal overvoltage as well as enhance the safety for human being in case of earthing incidents.
Źródło:
Inżynieria Mineralna; 2019, 21, 2/2; 52-57
1640-4920
Pojawia się w:
Inżynieria Mineralna
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:
CrossGrid - tools and services for interactive grid applications
Autorzy:
Bubak, M.
Malawski, M.
Rycerz, K.
Turała, M.
Powiązania:
https://bibliotekanauki.pl/articles/1964214.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
grids
architecture
services
interactive applications
Globus Toolkit
OGSA
Opis:
The CrossGrid Project aims to develop new Grid services and a tool environment for a representative set of interactive compute- and data-intensive applications. This paper presents the architecture of the software and a description of the functionality of the main components. The new tools and grid services are based on the Globus Toolkit and the EU DataGrid middleware. CrossGrid develops and operates a large international testbed, where the developed applications, services and tools are deployed and run.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 4; 503-512
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring GRID resources: JMX in action
Autorzy:
Balos, K.
Radziszowski, D.
Rzepa, P.
Zieliński, K.
Zieliński, S.
Powiązania:
https://bibliotekanauki.pl/articles/1964215.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
JMX
grids
monitoring
distributed system
SOA
web services
Opis:
This paper summarizes research on monitoring GRID resources, which resulted in the implementation of the JIMS system. It contains an overview of the most important architectural and software concepts that make the constructed system flexible and user-friendly. The paper evaluates JMX and Web Service technologies as foundations for implementing monitoring systems. Particular attention has been paid to system adaptability, autoconfiguration and interoperability.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 4; 487-501
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyber Security of Electrical Grids – A Contribution to Research
Autorzy:
Włodyka, Ewa Maria
Kaczmarek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/31342016.pdf
Data publikacji:
2024-05-20
Wydawca:
Akademia Sztuki Wojennej
Tematy:
electrical grids
public administration
cyber security
critical infrastructure
Opis:
The state’s critical infrastructure involves those elements that function independently yet are interconnected. It is also affected by ICT networks that exist in other states. These interdependencies make critical infrastructure particularly vulnerable to cyber attacks. At the same time, it is electrical grids that constitute the most crucial element of critical infrastructure. The research hypothesis assumes an urgent need to comprehensively address the cyber security policy of electrical grids in a broader perspective, not only the technical one but also taking into account public policies and the human factor. Quantitative and qualitative methods, literature survey and the desk research method were employed in order to verify this hypothesis. The analyses carried out by the Authors indicated unequivocally that electrical grids constitute an element of the critical infrastructure that is the most vulnerable to cyber threats.
Źródło:
Cybersecurity and Law; 2024, 12, 2; 260-272
2658-1493
Pojawia się w:
Cybersecurity and Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capability of synchronous machines to ride through events with high ROCOF
Autorzy:
Assenkamp, Alf
Kreischer, Christian
Kulig, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/140451.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ROCOF
under-excitation protection
turbo-generator
low-inertia grids
Opis:
The transition of power grids to implement large amounts of nonsynchronous renewables reduces the inertia in the power system. Therefore, the rate of change of fre- quency (ROCOF) after a fault of given energy is higher in low inertia grids than in grids with mainly synchronous machines operating. Standard faults for the design of existing synchronous machines assume fixed frequency grids, in which an electrically close fault happens. It is not tested, if the machines can ride through transient disturbances with high ROCOF. For ROCOF values of up to 1 Hz/s as foreseen for the upcoming grid code of the Republic of Ireland and up to 2 Hz/s for Northern Ireland, a thorough verification, if generators are capable to ride through such events is necessary. For this study, ROCOF frequency traces provided by the transmission system operators (TSOs) of Ireland were first benchmarked with a full-grid model and in a second step impressed on a model of generators connected to the power grid via a step-up transformer to study transient stability and nonlinear response of the generator. This paper focusses on the ability of nine different synchronous machines to stay connected to the transmission system during severe ROCOF events without losing synchronism.
Źródło:
Archives of Electrical Engineering; 2019, 68, 2; 325-339
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of grounding grids parameter at arbitrary geometry
Autorzy:
Silva, C. L. B.
Pires, T. G.
Calixto, W. P.
Oliveira, D. N.
Souza, L. A. P.
Filho, A. M. S.
Powiązania:
https://bibliotekanauki.pl/articles/136173.pdf
Data publikacji:
2017
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
grounding grids parameters
Heppe
soil stratified in two layers
Opis:
This paper deals with the computation of ground resistance, surface voltage, touch voltage and step voltage, to mesh with horizontal wires arranged in different angles. The computer program implemented used in the mathematical modeling is based on the method proposed by Heppe, which allows obtaining the grounding parameters for homogeneous soil and soil stratified in two layers. The results obtained with the proposed method will be compared with other methods in literature. Also will be presented the results of a grounding grid using wires at various angles.
Źródło:
Transactions on Environment and Electrical Engineering; 2017, 2, 2; 11-17
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the importance of the e-infrastructure for science
Autorzy:
Stroiński, Maciej
Węglarz, Jan
Powiązania:
https://bibliotekanauki.pl/articles/704267.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
e-infrastructure
computer networks
grids
information and telecommunication technology
Opis:
In this article the European scientific e-infrastructure is described with special emphasis on the contribution of the Polish scientific community. Examples of this infrastructure for radioastronomy, high-energy physics and medicine are presented. Directions of further development in the field are pointed out.
Źródło:
Nauka; 2008, 2
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrigendum to "acyclic sum-list-colouring of grids and other classes of graphs" [Opuscula Math. 37, no. 4 (2017), 535 556]
Autorzy:
Drgas-Burchardt, E.
Drzystek, A.
Powiązania:
https://bibliotekanauki.pl/articles/254952.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sum-list colouring
acyclic colouring
grids
generalized Petersen graphs
Opis:
This note provides some minor corrections to the article [Acyclic sum-list-colouring of grids and other classes of graphs, Opuscula Math. 37, no. 4 (2017), 535-556].
Źródło:
Opuscula Mathematica; 2018, 38, 6; 899-901
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acyclic sum-list-colouring of grids and other classes of graphs
Autorzy:
Drgas-Burchardt, E.
Drzystek, A.
Powiązania:
https://bibliotekanauki.pl/articles/254959.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sum-list colouring
acyclic colouring
grids
generalized Petersen graphs
Opis:
In this paper we consider list colouring of a graph G in which the sizes of lists assigned to different vertices can be different. We colour G from the lists in such a way that each colour class induces an acyclic graph. The aim is to find the smallest possible sum of all the list sizes, such that, according to the rules, G is colourable for any particular assignment of the lists of these sizes. This invariant is called the D1-sum-choice-number of G. In the paper we investigate the D1-sum-choice-number of graphs with small degrees. Especially, we give the exact value of the D1-sum-choice-number for each grid [formula], when at least one of the numbers n, rn is less than five, and for each generalized Petersen graph. Moreover, we present some results that estimate the D1-sum-choice-number of an arbitrary graph in terms of the decycling number, other graph invariants and special subgraphs.
Źródło:
Opuscula Mathematica; 2017, 37, 4; 535-556
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart Grids after the Third Liberalization Package: Current Developments and Future Challenges for Regulatory Policy in the Electricity Sector
Autorzy:
Swora, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/530219.pdf
Data publikacji:
2011-06-01
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
smart grids
smart metering
energy regulation
output-based regulation
Opis:
The smart grid is a concept for the development of power distribution grids that offers great promise for the realization of the ambitious objectives of European Energy Policy. In its Third Energy Liberalization Package, European energy law has introduced the concept of intelligent grids and intelligent metering systems. A new directive of EPBD (energy performance of buildings) is to press ahead with this trend. At the same time work is underway at the European Commission and with European Regulators concerning standardization and the new shape of regulatory policy in the implementation stage. The EU legislation and regulatory policy of the National Regulatory Authorities will have to take into consideration the current trends in the modernization of the networks. Among other things, this means revising the existing regulatory model, and that will have to take into account the performance and output of industry networks.
Smart Grid est le concept du développement des réseaux de la distribution de l’électricité, qui donne la chance de réaliser des objectifs de grande importance de la perspective des Politiques Européennes de l’Énergie. Le droit européen de l’énergie a introduit, dans son troisième paquet de libéralisation, le concept des réseaux intelligents et des systèmes de compteurs intelligents. La nouvelle directive sur la performance énergétique des bâtiments (EPBD) constitue une continuation de cette tendance. Au même temps, les travaux des la Commission Européenne et des Régulateurs Européens concernant la standardisation et la nouvelle forme des politiques de régulation, sont réalisés. La législation de l’UE et la politique de régulation des autorités réglementaires, doivent prendre en considération les tendances contemporaines de la modernisation des réseaux. Cela signifie, entre autre, une révision du modèle de régulation existant, qui doit prendre en considération la performance et les effets des réseaux de l’industrie.
Źródło:
Yearbook of Antitrust and Regulatory Studies; 2011, 4(4); 9-22
1689-9024
2545-0115
Pojawia się w:
Yearbook of Antitrust and Regulatory Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 45

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