Keyphrases
- keywords
- information retrieval
- news stories
- information retrieval systems
- person names
- document collections
- news articles
- particle filter
- news items
- relevant documents
- xml documents
- document classification
- free text
- text documents
- textual content
- document analysis
- document retrieval
- news corpus
- particle filtering
- document clustering
- user queries
- web documents
- social media
- appearance model
- object tracking
- mean shift
- online news
- clustering algorithm