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Deep Learning with Theano

You're reading from   Deep Learning with Theano Perform large-scale numerical and scientific computations efficiently

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781786465825
Length 300 pages
Edition 1st Edition
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Author (1):
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Christopher Bourez Christopher Bourez
Author Profile Icon Christopher Bourez
Christopher Bourez
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Table of Contents (15) Chapters Close

Preface 1. Theano Basics FREE CHAPTER 2. Classifying Handwritten Digits with a Feedforward Network 3. Encoding Word into Vector 4. Generating Text with a Recurrent Neural Net 5. Analyzing Sentiment with a Bidirectional LSTM 6. Locating with Spatial Transformer Networks 7. Classifying Images with Residual Networks 8. Translating and Explaining with Encoding – decoding Networks 9. Selecting Relevant Inputs or Memories with the Mechanism of Attention 10. Predicting Times Sequences with Advanced RNN 11. Learning from the Environment with Reinforcement 12. Learning Features with Unsupervised Generative Networks 13. Extending Deep Learning with Theano Index

Designing the architecture for the model


The main blocks of the model in this example will be the following:

  • First, the words of the input sentence are mapped to vectors of real numbers. This step is called vector representation of words or word embedding (for more details, see Chapter 3, Encoding Word into Vector).

  • Afterwards, this sequence of vectors is represented by one fixed-length and real-valued vector using a bi-LSTM encoder. This vector summarizes the input sentence and contains semantic, syntactic, and/or sentimental information based on the word vectors.

  • Finally, this vector is passed through a softmax classifier to classify the sentence into positive, negative, or neutral.

Vector representations of words

Word embeddings are an approach to distributional semantics that represents words as vectors of real numbers. Such a representation has useful clustering properties, since the words that are semantically and syntactically related are represented by similar vectors (see Chapter 3,...

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