The paper first offers a parallel between two approaches to conceptual clustering, namely formal concept analysis (augmented with the introduction of new operators) and bipartite graph analysis. It is shown that a formal concept (as defined in formal concept analysis) corresponds to the idea of a maximal bi-clique, while sub-contexts, which correspond to independent “conceptual worlds” that can...

The theory of concept (or Galois) lattices provides a natural and formal setting in which to discover and represent concept hierarchies. In this paper we present a system, GALOIS, which is able to determine the concept lattice corresponding to a given set of objects. GALOIS is incremental and relatively efficient, the time complexity of each update ranging from O(n) to O(n2) where n is the numb...

The gravitational lensing, as well as the velocity field and the cosmological light-cone warp, changes the observed correlation function of high-redshift objects. We present an analytical expression of 3D correlation function, simultaneously including those three effects. When two objects are separated over several hundreds Mpc along a line of sight, the observed correlation function is dominat...

the aim of this study was to investigate relationship between social capital and organizational excellence. initially, about excellence, history and the concept of social capital and its components are described. then, the organizational approach to social capital was examined and the impact of social capital on organizational performance was evaluated. on the basis of the conceptual model, the...

This paper discusses an document discovery tool based on conceptual clustering by formal concept analysis. The program allows users to navigate email using a visual lattice metaphor rather than a tree. It implements a virtual le structure over email where les and entire directories can appear in multiple positions. The content and shape of the lattice formed by the conceptual ontology can assis...

This paper proposes a new fuzzy FCA-based approach to conceptual clustering for automatic generation of concept hierarchy on uncertainty data. The proposed approach first incorporates fuzzy logic into Formal Concept Analysis (FCA) to form a fuzzy concept lattice. Next, a fuzzy conceptual clustering technique is proposed to cluster the fuzzy concept lattice into conceptual clusters. Then, hierar...

Аннотация. Предлагается модификация алгоритма концептуальной кластеризации Cobweb с целью применения его для количественных данных. Ключевые слова: кластеризация, алгоритм Cobweb, количественные данные, нечеткая функция принадлежности. Korobeynikov A.V., cand.tech.sci., director, Ltd «IzhTeleMed»; Islamgaliev I.I., software engineer, JSC «Sarapul Electric Generators» MODIFICATION OF CONCEPTUAL ...

In this paper we discuss Conceptual Knowledge Discovery in Databases (CKDD) as it is developing in the field of Conceptual Knowledge Processing. Conceptual Knowledge Processing is based on the mathematical theory of Formal Concept Analysis which has become a successful theory for data analysis during the last two decades. CKDD aims to support a human-centered process of discovering knowledge fr...