Keyphrases
- input space
- sentiment classification
- sentiment analysis
- text classification
- dimensionality reduction
- cross domain
- feature space
- online product reviews
- opinion mining
- cross lingual
- sentence level
- machine translation
- input data
- training set
- kernel function
- high dimensional data
- high dimensional
- low dimensional
- data points
- knn
- k nearest neighbor
- class labels
- product reviews
- sentiment polarity
- target domain
- principal component analysis
- kernel matrix
- feature extraction
- word alignment
- natural language processing
- statistical machine translation
- output space