Keyphrases
- random projections
- language modelling
- n gram
- language model
- dimensionality reduction
- ad hoc retrieval
- image reconstruction
- original data
- dimension reduction
- neural network
- tf idf
- sparse representation
- random sampling
- hash functions
- pseudo relevance feedback
- principal component analysis
- low dimensional
- document clustering
- machine learning
- document ranking
- relevance model
- high dimensionality
- feature extraction
- bag of words
- test collection
- action recognition
- learning algorithm
- weighting scheme
- information retrieval
- high dimensional
- relevance feedback