PSearch

Developer(s)

Affiliation(s)

 * Centre for Text Technology (CTexT™), North-West University, Potchefstroom, South-Africa
**School of Electrical, Electronic and Computer Engineering, North-West University, Potchefstroom, South-Africa
^ Faculty of Arts ,Tilburg University, Tilburg The Netherlands

Description

PSearch is based on Paramsearch, a tool created by Antal van den Bosch for automatic algorithmic parameter optimisation for TiMBL and other machine learning algorithms. Paramsearch is available for download from http://ilk.uvt.nl/software/.

PSearch works basically on the same principles as Paramsearch, with the major difference being the way that the sizes of the progressive training and evaluation data sets are generated. Another difference is that PSearch can utilise all of the TiMBL algorithms.

Groenewald, Van Huyssteen & Puttkammer (2007) report that PSearch outperforms Paramsearch when evaluated on two classification tasks, namely lemmatisation and hyphenation in Afrikaans.

Work on PSearch continues.

Category(ies)

Automatic Algorithmic Parameter Optimisation

Language(s): In

N/A

Language(s): Out

N/A

Distribution

Online

Documentation

• Groenewald, HJ, Van Huyssteen, GB & Puttkammer, MJ. Evaluating Wrapped Progressive Sampling for Automatic Algorithmic Parameter Optimasiation. Proceedings: RANLP 2007 (Recent Advances in Natural Language Processing), Borovets, Bulgaria, September  27-29, 2007.
• Groenewald, HJ. Automatic Lemmatisation for Afrikaans, Noordwes-Universiteit, 2007.
• Daelemans, W, Van den Bosch, A, Zavrel, J & Van der Sloot, A. "TiMBL: Tilburg Memory  Based Learner, Version 5.1, Reference Guide", ILK Technical Report, February 4, 2004.
• Van den Bosch, A. Wrapped Progressive Sampling Search for Optimizing Learning Algorithm Parameters. In L. Schomaker, R. Verbrugge, and N.Taatgen (Eds.), Proceedings of the Sixteenth Belgian-Dutch Artificial Intelligence Conference, Groningen, 2004.

Operating
System(s )

Linux

Programming Language

Perl

Execution Location

Local

Required Software

TiMBL 5.1 , Perl

Pricing:
Academic

n/a

Pricing:
Multiple Users

n/a

Pricing:
Commercial

n/a

Licence

Open Source (GPL)
 

Other Information

To acquire the source code, please send an e-mail to Handré Groenewald (Handre.Groenewald@nwu.ac.za)