Search Results for author: Zhengwu Zhang

Found 10 papers, 6 papers with code

Motion-Invariant Variational Auto-Encoding of Brain Structural Connectomes

1 code implementation8 Dec 2022 Yizi Zhang, Meimei Liu, Zhengwu Zhang, David Dunson

We applied the proposed model to data from the Adolescent Brain Cognitive Development (ABCD) study and the Human Connectome Project (HCP) to investigate how our motion-invariant connectomes facilitate understanding of the brain network and its relationship with cognition.

Interpretable AI for relating brain structural and functional connectomes

1 code implementation10 Oct 2022 Haoming Yang, Steven Winter, Zhengwu Zhang, David Dunson

One of the central problems in neuroscience is understanding how brain structure relates to function.

Learning to Model the Relationship Between Brain Structural and Functional Connectomes

1 code implementation18 Dec 2021 Yang Li, Gonzalo Mateos, Zhengwu Zhang

Recent advances in neuroimaging along with algorithmic innovations in statistical learning from network data offer a unique pathway to integrate brain structure and function, and thus facilitate revealing some of the brain's organizing principles at the system level.

Graph Representation Learning

Amplitude Mean of Functional Data on $\mathbb{S}^2$

1 code implementation29 Jul 2021 Zhengwu Zhang, Bayan Saparbayeva

Manifold-valued functional data analysis (FDA) recently becomes an active area of research motivated by the raising availability of trajectories or longitudinal data observed on non-linear manifolds.

Auto-encoding brain networks with applications to analyzing large-scale brain imaging datasets

no code implementations7 Nov 2019 Meimei Liu, Zhengwu Zhang, David B. Dunson

In this paper, building on recent advances in deep learning, we develop a nonlinear latent factor model to characterize the population distribution of brain graphs and infer the relationships between brain structural connectomes and human traits.

Dimensionality Reduction

Discovering Common Change-Point Patterns in Functional Connectivity Across Subjects

no code implementations26 Apr 2019 Mengyu Dai, Zhengwu Zhang, Anuj Srivastava

This paper studies change-points in human brain functional connectivity (FC) and seeks patterns that are common across multiple subjects under identical external stimulus.

Time Series Time Series Analysis

Analyzing Dynamical Brain Functional Connectivity As Trajectories on Space of Covariance Matrices

1 code implementation10 Apr 2019 Mengyu Dai, Zhengwu Zhang, Anuj Srivastava

Human brain functional connectivity (FC) is often measured as the similarity of functional MRI responses across brain regions when a brain is either resting or performing a task.

Clustering Dimensionality Reduction +3

Low-Rank Representation over the Manifold of Curves

no code implementations5 Jan 2016 Stephen Tierney, Junbin Gao, Yi Guo, Zhengwu Zhang

However the data may actually be functional i. e.\ each data point is a function of some variable such as time and the function is discretely sampled.

Bayesian Clustering of Shapes of Curves

1 code implementation1 Apr 2015 Zhengwu Zhang, Debdeep Pati, Anuj Srivastava

The elastic-inner product matrix obtained from the data is modeled using a Wishart distribution whose parameters are assigned carefully chosen prior distributions to allow for automatic inference on the number of clusters.

Clustering valid

Video-Based Action Recognition Using Rate-Invariant Analysis of Covariance Trajectories

no code implementations23 Mar 2015 Zhengwu Zhang, Jingyong Su, Eric Klassen, Huiling Le, Anuj Srivastava

Using a natural Riemannain metric on vector bundles of SPDMs, we compute geodesic paths and geodesic distances between trajectories in the quotient space of this vector bundle, with respect to the re-parameterization group.

Action Recognition General Classification +8

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