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Wyświetlanie 1-3 z 3
Tytuł:
Rough Modeling---a Bottom-up Approach to Model Construction
Autorzy:
Loken, T.
Komorowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/908362.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
model opisowy
wybieranie danych
knowledge discovery
rough sets
rough modeling
descriptive models
Opis:
Traditional data mining methods based on rough set theory focus on extracting models which are good at classifying unseen objects. If one wants to uncover new knowledge from the data, the model must have a high descriptive quality---it must describe the data set in a clear and concise manner, without sacrificing classification performance. Rough modeling, introduced by Kowalczyk (1998), is an approach which aims at providing models with good predictive and descriptive qualities, in addition to being computationally simple enough to handle large data sets. As rough models are flexible in nature and simple to generate, it is possible to generate a large number of models and search through them for the best model. Initial experiments confirm that the drop in performance of rough models compared to models induced using traditional rough set methods is slight at worst, and the gain in descriptive quality is very large.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2001, 11, 3; 675-690
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resource and service discovery in SOAs: A P2P oriented semantic approach
Autorzy:
Di Modica, G.
Tomarchio, O.
Vita, L.
Powiązania:
https://bibliotekanauki.pl/articles/907782.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
SOA
semantyka
sieć P2P
serwis internetowy
web service discovery
semantic
P2P
JXTA
Opis:
An intense standardization process is favouring the convergence of grids and Service Oriented Architectures (SOAs). One of the benefits of such technological convergence is that grid resources and applications can be virtualized by services and offered through the SOA paradigm. In the broad and interoperable scenarios enabled by the SOA, involving the participation of several grid infrastructures across many administrative domains, service discovery can be a serious issue. In this paper we present a P2P-based infrastructure that leverages semantic technologies to support a scalable and accurate service discovery process. The key concept of the presented idea is the creation of an overlay network organized in several semantic groups of peers, each specialized in answering queries pertaining to specific applicative domains. Groups are formed by clustering together peers offering services that are semantically related. The architecture details of the proposed solution are presented. A system prototype has also been implemented and validated through a case study deployed on the PlanetLab testbed.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 2; 285-294
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge discovery in data using formal concept analysis and random projections
Autorzy:
Aswani Kumar, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/930145.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
redukcja wymiarowości
odkrywanie wiedzy
projekcja losowa
attribute implications
concept lattices
dimensionality reduction
formal concept analysis
knowledge discovery
random projections
Opis:
In this paper our objective is to propose a random projections based formal concept analysis for knowledge discovery in data. We demonstrate the implementation of the proposed method on two real world healthcare datasets. Formal Concept Analysis (FCA) is a mathematical framework that offers a conceptual knowledge representation through hierarchical conceptual structures called concept lattices. However, during the design of a concept lattice, complexity plays a major role.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 745-756
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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