24132 search results - page 4645 / 4827 » and 2009 |
157
click to vote
SIGIR
2009
ACM
16 years 1 months ago
2009
ACM
Pseudo relevance feedback (PRF), which has been widely applied in IR, aims to derive a distribution from the top n pseudo relevant documents D. However, these documents are often ...
174
click to vote
SIGIR
2009
ACM
16 years 1 months ago
2009
ACM
Most retrieval models estimate the relevance of each document to a query and rank the documents accordingly. However, such an approach ignores the uncertainty associated with the ...
192
click to vote
SIGIR
2009
ACM
16 years 1 months ago
2009
ACM
With the sheer growth of online user data, it becomes challenging to develop preference learning algorithms that are sufficiently flexible in modeling but also affordable in com...
180
click to vote
SIGIR
2009
ACM
16 years 1 months ago
2009
ACM
Pseudo-relevance feedback (PRF) via query-expansion has been proven to be effective in many information retrieval (IR) tasks. In most existing work, the top-ranked documents from...
174
click to vote
SIGIR
2009
ACM
16 years 1 months ago
2009
ACM
A number of online video social networks, out of which YouTube is the most popular, provides features that allow users to post a video as a response to a discussion topic. These f...