Search Results for author: Geoffrey Gordon

Found 8 papers, 3 papers with code

Information Obfuscation of Graph Neural Networks

1 code implementation28 Sep 2020 Peiyuan Liao, Han Zhao, Keyulu Xu, Tommi Jaakkola, Geoffrey Gordon, Stefanie Jegelka, Ruslan Salakhutdinov

While the advent of Graph Neural Networks (GNNs) has greatly improved node and graph representation learning in many applications, the neighborhood aggregation scheme exposes additional vulnerabilities to adversaries seeking to extract node-level information about sensitive attributes.

Adversarial Defense Graph Representation Learning +2

Recurrent Predictive State Policy Networks

2 code implementations ICML 2018 Ahmed Hefny, Zita Marinho, Wen Sun, Siddhartha Srinivasa, Geoffrey Gordon

Predictive state policy networks consist of a recursive filter, which keeps track of a belief about the state of the environment, and a reactive policy that directly maps beliefs to actions, to maximize the cumulative reward.

OpenAI Gym

Learning General Latent-Variable Graphical Models with Predictive Belief Propagation

no code implementations6 Dec 2017 Borui Wang, Geoffrey Gordon

Learning general latent-variable probabilistic graphical models is a key theoretical challenge in machine learning and artificial intelligence.

Predictive State Recurrent Neural Networks

no code implementations NeurIPS 2017 Carlton Downey, Ahmed Hefny, Boyue Li, Byron Boots, Geoffrey Gordon

We present a new model, Predictive State Recurrent Neural Networks (PSRNNs), for filtering and prediction in dynamical systems.

Tensor Decomposition

Practical Learning of Predictive State Representations

no code implementations14 Feb 2017 Carlton Downey, Ahmed Hefny, Geoffrey Gordon

Unfortunately it is not obvious how to apply apply an EM style algorithm in the context of PSRs as the Log Likelihood is not well defined for all PSRs.

Supervised Learning for Dynamical System Learning

no code implementations NeurIPS 2015 Ahmed Hefny, Carlton Downey, Geoffrey Gordon

To address this problem, we present a new view of dynamical system learning: we show how to learn dynamical systems by solving a sequence of ordinary supervised learning problems, thereby allowing users to incorporate prior knowledge via standard techniques such as L1 regularization.

regression

Hilbert Space Embeddings of Predictive State Representations

no code implementations26 Sep 2013 Byron Boots, Geoffrey Gordon, Arthur Gretton

The essence is to represent the state as a nonparametric conditional embedding operator in a Reproducing Kernel Hilbert Space (RKHS) and leverage recent work in kernel methods to estimate, predict, and update the representation.

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