I found this recent paper on adhoc-IR from CIKM 2013. I haven’t worked in this area but the results seem promising. Essentially, instead of TF, you store an indegree count. The graph in question is the term co-occurrence graph within a window with the direction indicating word-order. The paper won hon. mention at the CIKM so it is clearly very cool.
In the IR reading group this week I decided to read the Percolator paper from Google. It caused quite a stir on several news-reading sites after a Google Research blog-post on the topic. Since I’ve never had the chance to read it, this is as good a time as any. This is not a comprehensive summary at all and lots of results here are hand-wavy. If you want to instruct yourself, please read the paper.
(c) Shriphani Palakodety 2013-2016