Search Results for author: Roni Khardon

Found 16 papers, 3 papers with code

Variational Inference on the Final-Layer Output of Neural Networks

no code implementations5 Feb 2023 Yadi Wei, Roni Khardon

In contrast, Bayesian neural networks provide good uncertainty quantification but optimizing them is time consuming due to the large parameter space.

Uncertainty Quantification Variational Inference

DiSProD: Differentiable Symbolic Propagation of Distributions for Planning

no code implementations3 Feb 2023 Palash Chatterjee, Ashutosh Chapagain, Weizhe Chen, Roni Khardon

DiSProD builds a symbolic graph that captures the distribution of future trajectories, conditioned on a given policy, using independence assumptions and approximate propagation of distributions.

Navigate

On the Performance of Direct Loss Minimization for Bayesian Neural Networks

no code implementations15 Nov 2022 Yadi Wei, Roni Khardon

Direct Loss Minimization (DLM) has been proposed as a pseudo-Bayesian method motivated as regularized loss minimization.

Variational Inference

Explainable Models via Compression of Tree Ensembles

no code implementations16 Jun 2022 Siwen Yan, Sriraam Natarajan, Saket Joshi, Roni Khardon, Prasad Tadepalli

Ensemble models (bagging and gradient-boosting) of relational decision trees have proved to be one of the most effective learning methods in the area of probabilistic logic models (PLMs).

Explainable Models

Approximate Inference for Stochastic Planning in Factored Spaces

1 code implementation23 Mar 2022 Zhennan Wu, Roni Khardon

Stochastic planning can be reduced to probabilistic inference in large discrete graphical models, but hardness of inference requires approximation schemes to be used.

Variational Inference

Direct loss minimization algorithms for sparse Gaussian processes

1 code implementation7 Apr 2020 Yadi Wei, Rishit Sheth, Roni Khardon

The application of DLM in non-conjugate cases is more complex because the logarithm of expectation in the log-loss DLM objective is often intractable and simple sampling leads to biased estimates of gradients.

Computational Efficiency Gaussian Processes +3

Sampling Networks and Aggregate Simulation for Online POMDP Planning

1 code implementation NeurIPS 2019 Hao(Jackson) Cui, Roni Khardon

Our approach enables scaling to large factored action spaces in addition to large state spaces and observation spaces.

From Stochastic Planning to Marginal MAP

no code implementations NeurIPS 2018 Hao Cui, Radu Marinescu, Roni Khardon

This yields a novel algebraic gradient-based solver (AGS) for MMAP.

Excess Risk Bounds for the Bayes Risk using Variational Inference in Latent Gaussian Models

no code implementations NeurIPS 2017 Rishit Sheth, Roni Khardon

The paper furthers such analysis by providing bounds on the excess risk of variational inference algorithms and related regularized loss minimization algorithms for a large class of latent variable models with Gaussian latent variables.

Gaussian Processes Topic Models +1

Stochastic Planning and Lifted Inference

no code implementations4 Jan 2017 Roni Khardon, Scott Sanner

Lifted probabilistic inference (Poole, 2003) and symbolic dynamic programming for lifted stochastic planning (Boutilier et al, 2001) were introduced around the same time as algorithmic efforts to use abstraction in stochastic systems.

Decision Making

Monte Carlo Structured SVI for Two-Level Non-Conjugate Models

no code implementations12 Dec 2016 Rishit Sheth, Roni Khardon

The stochastic variational inference (SVI) paradigm, which combines variational inference, natural gradients, and stochastic updates, was recently proposed for large-scale data analysis in conjugate Bayesian models and demonstrated to be effective in several problems.

Gaussian Processes Topic Models +2

The Complexity of Reasoning with FODD and GFODD

no code implementations5 Jul 2014 Benjamin J. Hescott, Roni Khardon

In particular, we study the evaluation problem, the satisfiability problem, and the equivalence problem for GFODDs under the assumption that the size of the intended model is given with the problem, a restriction that guarantees decidability.

Probabilistic Relational Planning with First Order Decision Diagrams

no code implementations16 Jan 2014 Saket Joshi, Roni Khardon

Recent work introduced a first order variant of decision diagrams (FODD) and developed a value iteration algorithm for this representation.

Symbolic Opportunistic Policy Iteration for Factored-Action MDPs

no code implementations NeurIPS 2013 Aswin Raghavan, Roni Khardon, Alan Fern, Prasad Tadepalli

We address the scalability of symbolic planning under uncertainty with factored states and actions.

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