The decision about the actual number of active neurons is an open issue in spike sorting, with sparsely firing neurons and background activity the most influencing factors. Dominant-sets clustering algorithm is a graph-theoretical algorithmic procedure that successfully addresses this issue. The quality of grouping in the data is evaluated with the estimation of ‘cohesiveness’, i.e. a cluster-quality measure, for each group.
Background noise and spike overlap pose problems in contemporary spike-sorting strategies. The (non-linear) isometric feature mapping (ISOMAP) technique reveals the intrinsic data structure and helps with recognising the involved neurons.
To reproduce this tutorial in MATLAB you will need : Read the rest of this entry…
In this tutorial by Dr. Liam Paninski, the Expectation-Maximization (EM) algorithm is discussed and illustrated in a variety of neural examples. Read the rest of this entry…
By Dr. Nikolaos A. Laskaris
The term ‘‘pattern’’, currently, encompasses the notion of a variety of data-forms the machines have to tackle with. Despite the fact that in early days it was used mostly for pictorial information, i.e. 2D-signals, now the same term stands almost for any output from a data-source. For instance, any digital-signal can be considered as an 1D-pattern, a grey-scale image as a 2D-patterm, a video-sequence as a (temporal) multi-dimensional pattern etc. Read the rest of this entry…
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| « Mar | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | ||||
Biometrics CPG Brain-inspired Computing transcranial direct current stimulation Neuro-inspired Computing Neural coding neuroprosthetics Deep Brain Stimulation LFP Machine Learning Sparse neurons Noise Computational Neuroscience Wavelets neural recordings Information Theory Dimensionality Reduction Modelling Neural Networks Clustering Statistical Analysis Neurophysiology Spike Sorting Brain Interfaces Brain Research
WP Cumulus Flash tag cloud by Roy Tanck requires Flash Player 9 or better.
Neuroinformatics news IEEE Spectrum Biomedical
Neurobot via RSS