Search Results for author: James Cussens

Found 12 papers, 2 papers with code

A Score-and-Search Approach to Learning Bayesian Networks with Noisy-OR Relations

1 code implementation3 Nov 2020 Charupriya Sharma, Zhenyu A. Liao, James Cussens, Peter van Beek

A Bayesian network can be learned from data using the well-known score-and-search approach, and within this approach a key consideration is how to simultaneously learn the global structure in the form of the underlying DAG and the local structure in the CPDs.

Learning All Credible Bayesian Network Structures for Model Averaging

no code implementations27 Aug 2020 Zhenyu A. Liao, Charupriya Sharma, James Cussens, Peter van Beek

However, selecting a single model (i. e., the best scoring BN) can be misleading or may not achieve the best possible accuracy.

Kernel-based Approach to Handle Mixed Data for Inferring Causal Graphs

no code implementations7 Oct 2019 Teny Handhayani, James Cussens

The advantage of this idea is that is possible to handle any data type by using a suitable kernel function to compute a kernel matrix for an observed variable.

Causal Inference

On Pruning for Score-Based Bayesian Network Structure Learning

1 code implementation23 May 2019 Alvaro H. C. Correia, James Cussens, Cassio de Campos

Many algorithms for score-based Bayesian network structure learning (BNSL), in particular exact ones, take as input a collection of potentially optimal parent sets for each variable in the data.

Online Causal Structure Learning in the Presence of Latent Variables

no code implementations30 Apr 2019 Durdane Kocacoban, James Cussens

We present two online causal structure learning algorithms which can track changes in a causal structure and process data in a dynamic real-time manner.

Finding All Bayesian Network Structures within a Factor of Optimal

no code implementations12 Nov 2018 Zhenyu A. Liao, Charupriya Sharma, James Cussens, Peter van Beek

However, selecting a single model (i. e., the best scoring BN) can be misleading or may not achieve the best possible accuracy.

Finding Minimal Cost Herbrand Models with Branch-Cut-and-Price

no code implementations14 Aug 2018 James Cussens

Given (1) a set of clauses $T$ in some first-order language $\cal L$ and (2) a cost function $c : B_{{\cal L}} \rightarrow \mathbb{R}_{+}$, mapping each ground atom in the Herbrand base $B_{{\cal L}}$ to a non-negative real, then the problem of finding a minimal cost Herbrand model is to either find a Herbrand model $\cal I$ of $T$ which is guaranteed to minimise the sum of the costs of true ground atoms, or establish that there is no Herbrand model for $T$.

Bayesian Network Structure Learning with Integer Programming: Polytopes, Facets, and Complexity

no code implementations13 May 2016 James Cussens, Matti Järvisalo, Janne H. Korhonen, Mark Bartlett

The challenging task of learning structures of probabilistic graphical models is an important problem within modern AI research.

First-order integer programming for MAP problems

no code implementations10 Jul 2015 James Cussens

Finding the most probable (MAP) model in SRL frameworks such as Markov logic and Problog can, in principle, be solved by encoding the problem as a `grounded-out' mixed integer program (MIP).

Exact Estimation of Multiple Directed Acyclic Graphs

no code implementations4 Apr 2014 Chris. J. Oates, Jim Q. Smith, Sach Mukherjee, James Cussens

This paper considers the problem of estimating the structure of multiple related directed acyclic graph (DAG) models.

Advances in Bayesian Network Learning using Integer Programming

no code implementations26 Sep 2013 Mark Bartlett, James Cussens

We consider the problem of learning Bayesian networks (BNs) from complete discrete data.

Bayesian network learning with cutting planes

no code implementations14 Feb 2012 James Cussens

The problem of learning the structure of Bayesian networks from complete discrete data with a limit on parent set size is considered.

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