Search Results for author: Ka Chun Lam

Found 6 papers, 2 papers with code

Interpretable factorization of clinical questionnaires to identify latent factors of psychopathology

1 code implementation12 Dec 2023 Ka Chun Lam, Bridget W Mahony, Armin Raznahan, Francisco Pereira

Psychiatry research seeks to understand the manifestations of psychopathology in behavior, as measured in questionnaire data, by identifying a small number of latent factors that explain them.

Imputation

Understanding Mental Representations Of Objects Through Verbs Applied To Them

no code implementations1 Jan 2021 Ka Chun Lam, Francisco Pereira, Maryam Vaziri-Pashkam, Kristin Woodard, Emalie McMahon

Finally, we show that the dimensions can be used to predict a state-of-the-art mental representation of objects, derived purely from human judgements of object similarity.

Object

Quasiconformal model with CNN features for large deformation image registration

no code implementations30 Oct 2020 Ho Law, Gary P. T. Choi, Ka Chun Lam, Lok Ming Lui

In this paper, we develop a novel method for large deformation image registration by a fusion of quasiconformal theory and convolutional neural network (CNN).

BIG-bench Machine Learning Image Registration

Mental representations of objects reflect the ways in which we interact with them

no code implementations22 Jun 2020 Ka Chun Lam, Francisco Pereira, Maryam Vaziri-Pashkam, Kristin Woodard, Emalie McMahon

In order to interact with objects in our environment, humans rely on an understanding of the actions that can be performed on them, as well as their properties.

Object

Improving the Interpretability of fMRI Decoding using Deep Neural Networks and Adversarial Robustness

1 code implementation23 Apr 2020 Patrick McClure, Dustin Moraczewski, Ka Chun Lam, Adam Thomas, Francisco Pereira

We introduce two quantitative evaluation procedures for saliency map methods in fMRI, applicable whenever a DNN or linear model is being trained to decode some information from imaging data.

Adversarial Robustness

A Fast Hierarchically Preconditioned Eigensolver Based On Multiresolution Matrix Decomposition

no code implementations10 Apr 2018 Thomas Y. Hou, De Huang, Ka Chun Lam, Ziyun Zhang

In this paper we propose a new iterative method to hierarchically compute a relatively large number of leftmost eigenpairs of a sparse symmetric positive matrix under the multiresolution operator compression framework.

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