Loading...
Please wait, while we are loading the content...
Similar Documents
Large Scale Computing for the Modelling of Whole Brain Connectivity
| Content Provider | Semantic Scholar |
|---|---|
| Author | Albers, Kristoffer Jon |
| Copyright Year | 2017 |
| Abstract | The infinite relational model (IRM) is a Bayesian nonparametric stochastic block model; a generative model for random networks parameterized for unipartite undirected networks by a partition of the node set and symmetric matrix of inter-partion link probabilities. The prior for the node clusters is the Chinese restaurant process, and the link probabilities are, in the most simple setting, modeled as iid. with a common symmetric Beta prior. More advanced priors such as separate asymmetric Beta priors for links within and between clusters have also been proposed. In this paper we investigate the importance of these priors for discovering latent clusters and for predicting links. We compare fixed symmetric priors and fixed asymmetric priors based on the empirical distribution of links with a Bayesian hierarchical approach where the parameters of the priors are inferred from data. On synthetic data, we show that the hierarchical Bayesian approach can infer the prior distributions used to generate the data. On real network data we demonstrate that using asymmetric priors significantly improves predictive performance and heavily influences the number of extracted partitions. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://backend.orbit.dtu.dk/ws/portalfiles/portal/140993852/phd450_Albers_KJ.pdf |
| Alternate Webpage(s) | http://orbit.dtu.dk/files/140993852/phd450_Albers_KJ.pdf |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/search.pdf?advanced=true&descending=true&institution=all&nofollow=true&ordering=publicationOrderByPublicationYearAndAuthor&organisationName=Department+of+Applied+Mathematics+and+Computer+Science+&organisations=52445105&page=0&pageSize=500&peerreview=&publicationYearsFrom=&publicationYearsTo=&publicationcategory=&publicationstatus=&rendering=short&search=phd&submissionYearsFrom=&submissionYearsTo=&type=/dk/atira/pure/publication/publicationtypes/bookanthology/%25&uri= |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/search.pdf?advanced=true&descending=true&institution=all&nofollow=true&ordering=publicationOrderByPublicationYearAndAuthor&organisationName=Department+of+Applied+Mathematics+and+Computer+Science+&organisations=52445105&page=0&pageSize=500&peerreview=&publicationYearsFrom=&publicationYearsTo=&publicationcategory=&publicationstatus=&rendering=standard&search=phd&submissionYearsFrom=&submissionYearsTo=&type=/dk/atira/pure/publication/publicationtypes/bookanthology/%25&uri= |
| Alternate Webpage(s) | https://orbit.dtu.dk/files/140993852/phd450_Albers_KJ.pdf |
| Alternate Webpage(s) | https://orbit.dtu.dk/ws/files/140993852/phd450_Albers_KJ.pdf |
| Alternate Webpage(s) | https://backend.orbit.dtu.dk/ws/files/140993852/phd450_Albers_KJ.pdf |
| Alternate Webpage(s) | http://orbit.dtu.dk/ws/files/140993852/phd450_Albers_KJ.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
