Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Analýza centrality× | Detekce komunit× | Model náhodných grafů (ERGM / p*)× | |
|---|---|---|---|
| Obor | Analýza sítí | Analýza sítí | Analýza sítí |
| Rodina | Process / pipeline | Process / pipeline | Process / pipeline |
| Rok vzniku≠ | 1979 | 2002–2019 (algorithm family) | 1986 (foundational); modern ERGM framework 1996–2007 |
| Tvůrce≠ | Linton C. Freeman | Louvain: Blondel et al. (2008); Leiden: Traag et al. (2019); Girvan-Newman: Girvan & Newman (2002); Infomap: Rosvall & Bergstrom (2008) | Frank & Strauss (1986); extended by Wasserman & Pattison (1996) and Robins et al. (2007) |
| Typ≠ | Descriptive / exploratory network measure family | Graph-partitioning / clustering algorithm family | Probabilistic generative network model |
| Původní zdroj≠ | Freeman, L.C. (1979). Centrality in Social Networks: Conceptual Clarification. Social Networks, 1(3), 215-239. DOI ↗ | Blondel, V.D., Guillaume, J.-L., Lambiotte, R. & Lefebvre, E. (2008). Fast Unfolding of Communities in Large Networks. Journal of Statistical Mechanics, 2008(10), P10008. DOI ↗ | Robins, G., Pattison, P., Kalish, Y., & Lusher, D. (2007). An introduction to exponential random graph (p*) models for social networks. Social Networks, 29(2), 173-191. DOI ↗ |
| Další názvy≠ | Merkeziyet Analizi (Degree, Betweenness, Eigenvector), node centrality, centrality measures, graph centrality | graph clustering, network partitioning, Topluluk Tespiti (Louvain, Girvan-Newman, Leiden) | ERGM, p-star model, p* model, Üstel Rastgele Graf Modeli (ERGM / p*) |
| Příbuzné≠ | 5 | 5 | 6 |
| Shrnutí≠ | Centrality analysis is a family of network-analytic measures, formalized by Freeman (1979), that quantifies the structural importance of individual nodes within a graph. Each centrality index captures a distinct mechanism of influence: degree centrality reflects direct connectivity, betweenness centrality identifies nodes that broker information flow, closeness centrality captures proximity to all others, and eigenvector centrality (along with PageRank) rewards connection to highly connected neighbors. | Community detection is a family of graph-partitioning algorithms that discover densely connected sub-groups — communities — within a network. First formalised through the modularity measure by Girvan and Newman (2002), the field advanced rapidly with the Louvain method (Blondel et al., 2008), the Leiden refinement (Traag et al., 2019), and the information-theoretic Infomap approach. All variants answer the same question: which nodes cluster together more tightly among themselves than with the rest of the network? | The Exponential Random Graph Model (ERGM), also known as the p* model, is a statistical framework for network analysis that models the probability of an observed network as a function of its local structural features — such as reciprocity, triangles, and degree distribution. Developed from the foundational work of Frank and Strauss (1986) and extended into the modern framework by Wasserman and Pattison (1996) and Robins et al. (2007), ERGM is the inferential standard for social network analysis, capable of testing whether observed network structures arise by chance or reflect genuine social processes. |
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