|
|
|
                                          
|
Return to Session Va: Language models
We systematically investigate a new approach to estimating the parameters of language models for information retrieval, called parsimonious language models. Parsimonious language models explicitly address the relation between levels of language models that are typically used for smoothing. As such, they need fewer (non-zero) parameters to describe the data. We apply parsimonious models at three stages of the retrieval process: 1) at indexing time; 2) at search time; 3) at feedback time. Experimental results show that we are able to build models that are significantly smaller than standard models, but that still perform at least as well as the standard approaches.
@inproceedings{1009025, author = {Djoerd Hiemstra and Stephen Robertson and Hugo Zaragoza}, title = {Parsimonious language models for information retrieval}, booktitle = {SIGIR '04: Proceedings of the 27th annual international conference on Research and development in information retrieval}, year = {2004}, isbn = {1-58113-881-4}, pages = {178--185}, location = {Sheffield, United Kingdom}, doi = {http://doi.acm.org/10.1145/1008992.1009025}, publisher = {ACM Press}, }  ©2005 Association for Computing Machinery |
