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At text classification example #945

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https://github.com/eclipse/deeplearning4j/blob/master/CONTRIBUTING.md before opening a pull request.

Signed-off-by: atuzhykov <[email protected]>
Signed-off-by: atuzhykov <[email protected]>
atuzhykov and others added 27 commits March 5, 2020 01:03
Signed-off-by: Andrii Tuzhykov <[email protected]>
Signed-off-by: Andrii Tuzhykov <[email protected]>
Signed-off-by: Andrii Tuzhykov <[email protected]>
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Looking good, just a few minor improvements to make.
Can we also make a backup of the branch, then flatten + sign on this branch as described here: https://deeplearning4j.org/eclipse-contributors

Otherwise I'm happy with this 👍

* As far model is predisposed to overfitting we also add l2 regularization and dropout for certain layers.
* To prepare reviews we use BertIterator, which is MultiDataSetIterator for training BERT (Transformer) models.
* We congigure BertIterator for supervised sequence classification:
* 0. As tokenizer we use BertWordPieceTokenizerFactory with provided BERT BASE UNCASED vocabulary.
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Maybe let's improve this slightly, add another line under 0.:
BertIterator and BertWordPieceTokenizer implement the Word Piece sub-word tokenization algorithm, with a vocabulary size of 30522 tokens.

int listenerFrequency = 20;
net.setListeners(new StatsListener(statsStorage, listenerFrequency), new ScoreIterationListener(50));
//Attach the StatsStorage instance to the UI: this allows the contents of the StatsStorage to be visualized
uiServer.attach(statsStorage);
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Maybe let's comment out the UI by default, as it adds some overhead (slows down training a bit). Users can uncomment it if they want to run it with UI. That would look like this:

        /*
        //Uncomment this section to run the example with the user interface
        UIServer uiServer = UIServer.getInstance();

        //Configure where the network information (gradients, activations, score vs. time etc) is to be stored
        //Then add the StatsListener to collect this information from the network, as it trains
        StatsStorage statsStorage = new FileStatsStorage(new File(System.getProperty("java.io.tmpdir"), "ui-stats-" + System.currentTimeMillis() + ".dl4j"));
        int listenerFrequency = 20;
        net.setListeners(new StatsListener(statsStorage, listenerFrequency), new ScoreIterationListener(50));
        //Attach the StatsStorage instance to the UI: this allows the contents of the StatsStorage to be visualized
        uiServer.attach(statsStorage);
        */
        
        net.setListeners(new ScoreIterationListener(50));

net.fit(train);

// Get and print accuracy, precision, recall & F1 and confusion matrix
Evaluation eval = net.doEvaluation(test, new Evaluation[]{new Evaluation()})[0];
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For MultiLayerNetwork, we can use net.evaluate(test)

pom.xml Outdated
@@ -28,7 +28,7 @@
<properties>
<!-- Change the nd4j.backend property to nd4j-cuda-9.2-platform,nd4j-cuda-10.0-platform or nd4j-cuda-10.1-platform to use CUDA GPUs -->
<nd4j.backend>nd4j-native-platform</nd4j.backend>
<!-- <nd4j.backend>nd4j-cuda-10.2-platform</nd4j.backend>-->
<!-- <nd4j.backend>nd4j-cuda-10.0-platform</nd4j.backend>-->
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Leave this commented out with 10.2

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2 participants