Search Results for author: Clark Glymour

Found 18 papers, 4 papers with code

Generalized Independent Noise Condition for Estimating Causal Structure with Latent Variables

no code implementations13 Aug 2023 Feng Xie, Biwei Huang, Zhengming Chen, Ruichu Cai, Clark Glymour, Zhi Geng, Kun Zhang

To address this, we propose a Generalized Independent Noise (GIN) condition for linear non-Gaussian acyclic causal models that incorporate latent variables, which establishes the independence between a linear combination of certain measured variables and some other measured variables.

Latent Hierarchical Causal Structure Discovery with Rank Constraints

no code implementations1 Oct 2022 Biwei Huang, Charles Jia Han Low, Feng Xie, Clark Glymour, Kun Zhang

Most causal discovery procedures assume that there are no latent confounders in the system, which is often violated in real-world problems.

Causal Discovery

Action-Sufficient State Representation Learning for Control with Structural Constraints

no code implementations12 Oct 2021 Biwei Huang, Chaochao Lu, Liu Leqi, José Miguel Hernández-Lobato, Clark Glymour, Bernhard Schölkopf, Kun Zhang

Perceived signals in real-world scenarios are usually high-dimensional and noisy, and finding and using their representation that contains essential and sufficient information required by downstream decision-making tasks will help improve computational efficiency and generalization ability in the tasks.

Computational Efficiency Decision Making +1

FRITL: A Hybrid Method for Causal Discovery in the Presence of Latent Confounders

no code implementations26 Mar 2021 Wei Chen, Kun Zhang, Ruichu Cai, Biwei Huang, Joseph Ramsey, Zhifeng Hao, Clark Glymour

The first step of our method uses the FCI procedure, which allows confounders and is able to produce asymptotically correct results.

Causal Discovery

Generalized Independent Noise Condition for Estimating Latent Variable Causal Graphs

no code implementations NeurIPS 2020 Feng Xie, Ruichu Cai, Biwei Huang, Clark Glymour, Zhifeng Hao, Kun Zhang

Despite its success in certain domains, most existing methods focus on causal relations between observed variables, while in many scenarios the observed ones may not be the underlying causal variables (e. g., image pixels), but are generated by latent causal variables or confounders that are causally related.

Causal Discovery

Domain Adaptation as a Problem of Inference on Graphical Models

1 code implementation NeurIPS 2020 Kun Zhang, Mingming Gong, Petar Stojanov, Biwei Huang, Qingsong Liu, Clark Glymour

Such a graphical model distinguishes between constant and varied modules of the distribution and specifies the properties of the changes across domains, which serves as prior knowledge of the changing modules for the purpose of deriving the posterior of the target variable $Y$ in the target domain.

Bayesian Inference Unsupervised Domain Adaptation

Triad Constraints for Learning Causal Structure of Latent Variables

no code implementations NeurIPS 2019 Ruichu Cai, Feng Xie, Clark Glymour, Zhifeng Hao, Kun Zhang

In this paper, by properly leveraging the non-Gaussianity of the data, we propose to estimate the structure over latent variables with the so-called Triad constraints: we design a form of "pseudo-residual" from three variables, and show that when causal relations are linear and noise terms are non-Gaussian, the causal direction between the latent variables for the three observed variables is identifiable by checking a certain kind of independence relationship.

Identification of Effective Connectivity Subregions

no code implementations8 Aug 2019 Ruben Sanchez-Romero, Joseph D. Ramsey, Kun Zhang, Clark Glymour

These algorithms allow for identification of subregions of voxels driving the connectivity between regions of interest, recovering valuable anatomical and functional information that is lost when ROIs are aggregated.

Hippocampus Time Series +1

Causal Discovery and Forecasting in Nonstationary Environments with State-Space Models

no code implementations26 May 2019 Biwei Huang, Kun Zhang, Mingming Gong, Clark Glymour

In many scientific fields, such as economics and neuroscience, we are often faced with nonstationary time series, and concerned with both finding causal relations and forecasting the values of variables of interest, both of which are particularly challenging in such nonstationary environments.

Bayesian Inference Causal Discovery +2

Causal Discovery from Heterogeneous/Nonstationary Data with Independent Changes

no code implementations5 Mar 2019 Biwei Huang, Kun Zhang, Jiji Zhang, Joseph Ramsey, Ruben Sanchez-Romero, Clark Glymour, Bernhard Schölkopf

In this paper, we develop a framework for causal discovery from such data, called Constraint-based causal Discovery from heterogeneous/NOnstationary Data (CD-NOD), to find causal skeleton and directions and estimate the properties of mechanism changes.

Causal Discovery

Diagnosis of Autism Spectrum Disorder by Causal Influence Strength Learned from Resting-State fMRI Data

no code implementations27 Jan 2019 Biwei Huang, Kun Zhang, Ruben Sanchez-Romero, Joseph Ramsey, Madelyn Glymour, Clark Glymour

A substantial body of researches use Pearson's correlation coefficients, mutual information, or partial correlation to investigate the differences in brain connectivities between ASD and typical controls from functional Magnetic Resonance Imaging (fMRI).

Causal Discovery feature selection

Causal Discovery in the Presence of Missing Data

1 code implementation11 Jul 2018 Ruibo Tu, Kun Zhang, Paul Ackermann, Bo Christer Bertilson, Clark Glymour, Hedvig Kjellström, Cheng Zhang

When these data entries are not missing completely at random, the (conditional) independence relations in the observed data may be different from those in the complete data generated by the underlying causal process.

Causal Discovery

Causal Generative Domain Adaptation Networks

no code implementations12 Apr 2018 Mingming Gong, Kun Zhang, Biwei Huang, Clark Glymour, DaCheng Tao, Kayhan Batmanghelich

For this purpose, we first propose a flexible Generative Domain Adaptation Network (G-DAN) with specific latent variables to capture changes in the generating process of features across domains.

Computational Efficiency Domain Adaptation

Causal Discovery in the Presence of Measurement Error: Identifiability Conditions

no code implementations10 Jun 2017 Kun Zhang, Mingming Gong, Joseph Ramsey, Kayhan Batmanghelich, Peter Spirtes, Clark Glymour

This problem has received much attention in multiple fields, but it is not clear to what extent the causal model for the measurement-error-free variables can be identified in the presence of measurement error with unknown variance.

Causal Discovery

Mixed Graphical Models for Causal Analysis of Multi-modal Variables

1 code implementation9 Apr 2017 Andrew J Sedgewick, Joseph D. Ramsey, Peter Spirtes, Clark Glymour, Panayiotis V. Benos

Graphical causal models are an important tool for knowledge discovery because they can represent both the causal relations between variables and the multivariate probability distributions over the data.

feature selection Graph Learning

Integrating Locally Learned Causal Structures with Overlapping Variables

no code implementations NeurIPS 2008 David Danks, Clark Glymour, Robert E. Tillman

In many domains, data are distributed among datasets that share only some variables; other recorded variables may occur in only one dataset.

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