A modified EM alr-algorithm for replacing rounded zeros in compositional data sets.
Javier Palarea-AlbaladejoJosep-Antoni Martín-FernándezPublished in: Comput. Geosci. (2008)
Keyphrases
- data sets
- expectation maximization
- learning algorithm
- improved algorithm
- probabilistic model
- gradient projection
- selection algorithm
- times faster
- em algorithm
- experimental evaluation
- dynamic programming
- k means
- optimal solution
- detection algorithm
- high accuracy
- computational complexity
- preprocessing
- optimization algorithm
- parameter estimation
- input data
- linear programming
- computational cost
- significant improvement
- gradient ascent
- image segmentation
- bayesian networks
- objective function
- np hard
- benchmark data sets
- bayesian framework
- clustering method
- segmentation algorithm
- computationally efficient
- maximum likelihood
- worst case