Search Results for author: Dimitris Berberidis

Found 7 papers, 1 papers with code

GraphSAC: Detecting anomalies in large-scale graphs

no code implementations21 Oct 2019 Vassilis N. Ioannidis, Dimitris Berberidis, Georgios B. Giannakis

Alleviating this limitation, GraphSAC randomly draws subsets of nodes, and relies on graph-aware criteria to judiciously filter out sets contaminated by anomalous nodes, before employing a semi-supervised learning (SSL) module to estimate nominal label distributions per node.

Anomaly Detection

Node Embedding with Adaptive Similarities for Scalable Learning over Graphs

1 code implementation27 Nov 2018 Dimitris Berberidis, Georgios B. Giannakis

Moreover, an algorithmic scheme is proposed for training the model parameters effieciently and in an unsupervised manner.

Clustering Community Detection +4

Adaptive Bayesian Radio Tomography

no code implementations6 Apr 2018 Donghoon Lee, Dimitris Berberidis, Georgios B. Giannakis

Key to success of RTI is to model accurately the shadowing effects as the bi-dimensional integral of the SLF scaled by a weight function, which is estimated using regularized regression.

Signal Processing Applications

Adaptive Diffusions for Scalable Learning over Graphs

no code implementations5 Apr 2018 Dimitris Berberidis, Athanasios N. Nikolakopoulos, Georgios B. Giannakis

Diffusion-based classifiers such as those relying on the Personalized PageRank and the Heat kernel, enjoy remarkable classification accuracy at modest computational requirements.

Classification General Classification

Data-adaptive Active Sampling for Efficient Graph-Cognizant Classification

no code implementations19 May 2017 Dimitris Berberidis, Georgios B. Giannakis

Leveraging the graph for classification builds on the premise that labels across neighboring nodes are correlated according to a categorical Markov random field (MRF).

Binary Classification Classification +1

Online Censoring for Large-Scale Regressions with Application to Streaming Big Data

no code implementations27 Jul 2015 Dimitris Berberidis, Vassilis Kekatos, Georgios B. Giannakis

Linear regression is arguably the most prominent among statistical inference methods, popular both for its simplicity as well as its broad applicability.

Dimensionality Reduction regression

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