margauxBerthaud / High-Dimensional-Deep-Learning

Science des données Saison 4 : Apprentissage en grande dimension, Données fonctionnelles, Détection d'anomalies, Introduction au Deep Learning

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High Dimensional and Deep Learning

Presentation :

The main theme of the course is learning methods, especially deep neural networks, for processing high dimensional data, such as signals or images. We will cover the following topics:

  • Neural networks and introduction to deep learning: definition of neural networks, activation functions, multilayer perceptron, backpropagation algorithms, optimization algorithms, regularization
    Application : Implementation of a mlp with one layer with Numpy

  • Convolutional neural networks: convolutional layer, pooling, dropout, convolutional network architectures (ResNet, Inception), transfer learning and fine tuning, applications for image or signal classification.
    Application : Image classification on MNIST and CatsVsDogs data with Tensorflow

  • Encoder-decoder, Variational auto-encoder, Generative adversarial networks

  • Functional decomposition on splines, Fourier or wavelets bases: cubic splines, penalized least squares criterion, Fourier basis, wavelet bases, applications to nonparametric regression, linear estimators and nonlinear estimators by thresholding, links with the LASSO method.

  • Anomaly detection for functional data: One Class SVM, Random Forest, Isolation Forest, Local Outlier Factor. Applications to anomaly detection in functional data.


Objectives :

At the end of this module, the student will have understood and be able to explain (main concepts):

  • Using deep learning methods for classification in high dimension
  • Classification of signal and images
  • Estimation of the prediction error
  • Dimension reduction by projections onto orthonormal bases
  • Anomaly detection
  • Application of deep learning methods on real data sets

The student will be able to:

  • Fit a deep neural network for signal or image classification
  • Implement deep learning methods in high dimension on real data sets with the software Python or R’s libraries.

Organisation :

  • Lectures : 15 H .

  • Practical works : 25 H applications on real data sets with the softwares R and Python's libraries Scikit Learn and Keras -Tensorflow.

Evaluation

  • written exam (50 %) - 09/12/2020

  • project (oral presentation 25% - 22/01/2021 + notebook (25%)
    The main of this project is to apply the knowledge you acquired during this course by:

    • Selecting a deep learning algorithm you haven't seen in this course.
    • Explaining how this algorithm works (oral presentation).
    • Apply these algorithm on a dataset and explain their performances (notebook and oral presentation).

You can choose a deep learning algorithm among the following list.
This list is not exhaustive and you can suggest other algorithms (that's actually a good idea).
Also, the code proposed on those examples are not necessarily the official code nor the one propose by the authors.

Example of algorithms

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Science des données Saison 4 : Apprentissage en grande dimension, Données fonctionnelles, Détection d'anomalies, Introduction au Deep Learning


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