A CUDA-C implementation of FOFE and FSMN

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For technical details on:

i) FOFE: refer to

[1] S. Zhang, H. Jiang, M. Xu, J. Hou, L. Dai, ”The Fixed-Size Ordinally-Forgetting Encoding Method for Neural Network Language Models,” Proc. of Annual Meeting of the Association for Computational Linguistics (ACL 2015), July 2015. (http://anthology.aclweb.org/P/P15/P15-2081.pdf)

ii) FSMN: refer to

[2] S. Zhang, H. Jiang, S. Wei, L. Dai, “Feedforward Sequential Memory Neural Networks without Recurrent Feedback,” arXiv:1510.02693. (http://arxiv.org/abs/1510.02693)

[3] S. Zhang, C. Liu, H. Jiang, S. Wei, L. Dai and Y. Hu, “Feedforward Sequential Memory Networks: A New Structure to Learn Long-term Dependency,” arXiv:1512.08301. (http://arxiv.org/abs/1512.08301)

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All files must following the naming convention of basename.{extension}. Examples are shown with PTB (Penn TreeBank) which is shipped with the code. That is, the basename in the provided example is ptb.

The following sub-directory of the current directory is assumed:

1. config -- containing user-defined configuration file

   An example of ptb's configration is in config. Each line describes a layer of the neural network. The first token is surrounded with angel brackets. The rest are (option, parameter) pairs. See ./source/network.cpp for details of what options are supported.

2. log -- containing execution logging

   It's strongly recommended to put the logging here and name them according to the configuration name, e.g. ptb.config.log

3. numeric-data

   The numeric data set returned by "numericize". It will be the input to "trainer". The naming must follow basename.{train, valid, test}.numeric. For PTB, there should be ptb.train.numeric, ptb.valid.numeric and ptb.test.numeric

4. raw-data

   Each file is a text file, one sentence per line. The naming must follow basename.{train, valid, test}.txt. For PTB, there should be ptb.train.txt, ptb.valid.txt and ptb.test.txt

5. source

   batch-constructor.cpp
   batch-constructor.h
   layer.h layer.cpp
   matrix.h
   matrix.cu
   network.h
   network.cpp
   stacktrace.h
   numericize.cpp
   trainer.cpp
   vocabulary.cpp
   evaluator.cpp

6. model-archive

   During training, for example, ptb.config.epoch{i}, the model at the beginning of the ith epoch is dumped on the disk. It's named with the configuration file, followed by ".epoch{i}".

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Using PTB as example:

1. compose your own network configuration and save it in ./config/ptb.config

2. run “prepare.sh ptb 1 10001”

3. run "trainer ptb.config ptb 0.4096 256 2 | tee log/ptb.config.log”

   learning-rate 0.4096
   mini-batch 256
   context window 2