Old news

03/11/2011

Release v1.3.0: MEMM, gradient and bug fixes

• Added support for Maximum Entropy Markov Models.
• Added use of atomic operation in gradient computation
• Improved RProp numerical stability
• Fix bug with unseen features in raw mode (thanks to Jurgen Van Gael)
• Fix bug discarding some features in maxent mode (thanks to George Foster)
• Switched code to stdint, should resolve some issue with size_t on exotic systems.

07/07/2011

Release v1.2.0: RPROP and features improvements

• Switch from splay-trees to critbit-tries in features index
• Add RPROP+ and RPROP- variants of the algorithm
• Add a new projection scheme for RPROP with l1
• Maxent now work with sequences
• Add spaces matching in regexp
• Fix a few small bugs

19/03/2011

Release v1.1.3: Some small improvements

• New option --jobsize for fine grained multi threading
• Improved SGD index construction : a lot faster
• Fix a small bug in sparse multi-threaded gradient

17/11/2010

Release v1.1.2: Bug fix release

• Fix a small bug in L-BFGS/OWL-QN, should improve a bit convergence speed in some case.
• Fix a bug in multi-thread job system thanks to Alexander Fraser, should fix error rates and training speed on large dataset.
• Fix two small memory leaks.
• Some improvment in quark database handling.

24/09/2010

Release v1.1.1: Mainly multi-threading improvements

• RPROP algorithm is now fully multi-threaded.
• Error rate estimation during training is now multi-threaded.
• Better jobs scheduling in multi-threaded gradient.
• Multi-threading code can be disabled (compilation on Windows should be simpler).
• Fixed bug in L1 optimization with RPROP (should improve stability).

08/09/2010

Release v1.1.0: A few new features

• Added maxent mode.
• Added decoding through posteriors, this should improve accuracy at the price of computational time.
• Added the RPROP optimization algorithm.
• Added absolute indexing in patterns.
• Changed the scored output format as the posterior decoding provide normalized score at each position. The output is now compatible with CRF++.
• Some code cleanup.

29/07/2010

Release v1.0.2: Mainly a bug fix version.

• Fixed some memory leaks, thanks to David Keeler
• Fixed argument processing to be more user friendly
• Fixed small bug in model compaction
• Added reading of raw files
• Spell corrections in man page

18/06/2010

Release v1.0.0: Initial public version.