Search Results for author: Alexander G. Ororbia

Found 13 papers, 2 papers with code

Brain-Inspired Machine Intelligence: A Survey of Neurobiologically-Plausible Credit Assignment

no code implementations1 Dec 2023 Alexander G. Ororbia

In this survey, we examine algorithms for conducting credit assignment in artificial neural networks that are inspired or motivated by neurobiology.

A Robust Backpropagation-Free Framework for Images

1 code implementation3 Jun 2022 Timothy Zee, Alexander G. Ororbia, Ankur Mali, Ifeoma Nwogu

While current deep learning algorithms have been successful for a wide variety of artificial intelligence (AI) tasks, including those involving structured image data, they present deep neurophysiological conceptual issues due to their reliance on the gradients that are computed by backpropagation of errors (backprop).

Adversarial Robustness

Continual Competitive Memory: A Neural System for Online Task-Free Lifelong Learning

no code implementations24 Jun 2021 Alexander G. Ororbia

In this article, we propose a novel form of unsupervised learning, continual competitive memory (CCM), as well as a computational framework to unify related neural models that operate under the principles of competition.

Split-MNIST

Sibling Neural Estimators: Improving Iterative Image Decoding with Gradient Communication

no code implementations20 Nov 2019 Ankur Mali, Alexander G. Ororbia, Clyde Lee Giles

For lossy image compression, we develop a neural-based system which learns a nonlinear estimator for decoding from quantized representations.

Image Compression Image Reconstruction

The Ant Swarm Neuro-Evolution Procedure for Optimizing Recurrent Networks

no code implementations26 Sep 2019 AbdElRahman A. ElSaid, Alexander G. Ororbia, Travis J. Desell

Hand-crafting effective and efficient structures for recurrent neural networks (RNNs) is a difficult, expensive, and time-consuming process.

Inductive Bias L2 Regularization +1

A Neural Temporal Model for Human Motion Prediction

1 code implementation CVPR 2019 Anand Gopalakrishnan, Ankur Mali, Dan Kifer, C. Lee Giles, Alexander G. Ororbia

We propose novel neural temporal models for predicting and synthesizing human motion, achieving state-of-the-art in modeling long-term motion trajectories while being competitive with prior work in short-term prediction and requiring significantly less computation.

Human motion prediction motion prediction +1

Biologically Motivated Algorithms for Propagating Local Target Representations

no code implementations26 May 2018 Alexander G. Ororbia, Ankur Mali

Finding biologically plausible alternatives to back-propagation of errors is a fundamentally important challenge in artificial neural network research.

Learned Neural Iterative Decoding for Lossy Image Compression Systems

no code implementations15 Mar 2018 Alexander G. Ororbia, Ankur Mali, Jian Wu, Scott O'Connell, David Miller, C. Lee Giles

For lossy image compression systems, we develop an algorithm, iterative refinement, to improve the decoder's reconstruction compared to standard decoding techniques.

Image Compression

Conducting Credit Assignment by Aligning Local Representations

no code implementations5 Mar 2018 Alexander G. Ororbia, Ankur Mali, Daniel Kifer, C. Lee Giles

Using back-propagation and its variants to train deep networks is often problematic for new users.

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