Kevin Chen's repositories
dnn-time-series
End-to-end deep learning predictive modeling package for time-series data.
py-postgresql
Pipeline between Python ETL code and PostgreSQL data queries.
Coupled-VAE-Improved-Robustness-and-Accuracy-of-a-Variational-Autoencoder
We present a coupled Variational Auto-Encoder (VAE) method that improves the accuracy and robustness of the probabilistic inferences on represented data. The new method models the dependency between input feature vectors (images) and weighs the outliers with a higher penalty by generalizing the original loss function to the coupled entropy function, using the principles of nonlinear statistical coupling. We evaluate the performance of the coupled VAE model using the MNIST dataset. Compared with the traditional VAE algorithm, the output images generated by the coupled VAE method are clearer and less blurry. The visualization of the input images embedded in 2D latent variable space provides a deeper insight into the structure of new model with coupled loss function: the latent variable has a smaller deviation and the output values are generated by a more compact latent space. We analyze the histograms of probabilities for the input images using the generalized mean metrics, in which increased geometric mean illustrates that the average likelihood of input data is improved. Increases in the -2/3 mean, which is sensitive to outliers, indicates improved robustness. The decisiveness, measured by the arithmetic mean of the likelihoods, is unchanged and -2/3 mean shows that the new model has better robustness.
deep-reinforcement-learning
Repo for the Deep Reinforcement Learning Nanodegree program
google-research
Google Research
image-classification-cnn
A Udacity Machine Learning Engineer (MLE) Nanodegree project where I classify images of dogs and even humans and objects into types of dog breed based on resemblance using Convolutional Neural Networks (CNNs).
Machine-Learning-for-Algorithmic-Trading-Second-Edition
Code and resources for Machine Learning for Algorithmic Trading, 2nd edition.
machine-learning-with-minishift
Training and Deploying Machine Learning Models with Containers
neural_prophet
NeuralProphet: A simple forecasting package
pommerman-playground
PlayGround: AI Research into Multi-Agent Learning.
RL-Quadcopter-2
Teach a Quadcopter How to Fly!
udacity-mle-nd
My Udacity Machine Learning Engineer (MLE) Nanodegree projects.