University of Wollongong Research Online University of Wollongong in Dubai - Papers University of Wollongong in Dubai 2008 Investigation of the Lambda Parameter for Language Modeling Based Persian Retrieval Hadi Amiri University of Tehran Ashkan Zarnani University of Tehran Mahbod Tavallaee University of Tehran Sadra Abedinzadeh University of Tehran Masoud Rahgozar University of Tehran See next page for additional authors Research Online is the open access institutional repository for the University of Wollongong. For further information contact Manager Repository Services: morgan@uow.edu.au. Publication Details This conference paper was originally published as Amiri, H., Zarnani, A., Tavallaee, M., Abedinzadeh, S., Rahgozar, M. & Oroumchian, F. 2008, 'Investigation of the lambda parameter for language modeling based Persian retrieval', in Proceedings of the 6th International Conference on Information and Systems, Faculty of Computers and Information, Cairo University, pp. NLP39-NLP44.