Search Results for author: Yixuan Qiu

Found 9 papers, 5 papers with code

BloomGML: Graph Machine Learning through the Lens of Bilevel Optimization

1 code implementation7 Mar 2024 Amber Yijia Zheng, Tong He, Yixuan Qiu, Minjie Wang, David Wipf

These optimal features typically depend on tunable parameters of the lower-level energy in such a way that the entire bilevel pipeline can be trained end-to-end.

Bilevel Optimization Graph Learning +1

Efficient Multimodal Sampling via Tempered Distribution Flow

1 code implementation8 Apr 2023 Yixuan Qiu, Xiao Wang

Sampling from high-dimensional distributions is a fundamental problem in statistical research and practice.

Image Generation

Learning Manifold Dimensions with Conditional Variational Autoencoders

1 code implementation23 Feb 2023 Yijia Zheng, Tong He, Yixuan Qiu, David Wipf

Although the variational autoencoder (VAE) and its conditional extension (CVAE) are capable of state-of-the-art results across multiple domains, their precise behavior is still not fully understood, particularly in the context of data (like images) that lie on or near a low-dimensional manifold.

Learning Multitask Gaussian Bayesian Networks

no code implementations11 May 2022 Shuai Liu, Yixuan Qiu, Baojuan Li, Huaning Wang, Xiangyu Chang

We consider the problem of identifying alterations of brain functional connectivity for a single MDD patient.

Training Deep Generative Models via Auxiliary Supervised Learning

no code implementations29 Sep 2021 Yijia Zheng, Yixuan Qiu

Deep generative modeling has long been viewed as a challenging unsupervised learning problem, partly due to the lack of labels and the high dimension of the data.

Representation Learning

Unbiased Contrastive Divergence Algorithm for Training Energy-Based Latent Variable Models

1 code implementation ICLR 2020 Yixuan Qiu, Lingsong Zhang, Xiao Wang

The contrastive divergence algorithm is a popular approach to training energy-based latent variable models, which has been widely used in many machine learning models such as the restricted Boltzmann machines and deep belief nets.

Randomized spectral co-clustering for large-scale directed networks

no code implementations25 Apr 2020 Xiao Guo, Yixuan Qiu, Hai Zhang, Xiangyu Chang

Directed networks are broadly used to represent asymmetric relationships among units.

Clustering

Stochastic Approximate Gradient Descent via the Langevin Algorithm

no code implementations13 Feb 2020 Yixuan Qiu, Xiao Wang

We introduce a novel and efficient algorithm called the stochastic approximate gradient descent (SAGD), as an alternative to the stochastic gradient descent for cases where unbiased stochastic gradients cannot be trivially obtained.

Gradient-based Sparse Principal Component Analysis with Extensions to Online Learning

2 code implementations19 Nov 2019 Yixuan Qiu, Jing Lei, Kathryn Roeder

In this work we study sparse PCA based on the convex FPS formulation, and propose a new algorithm that is computationally efficient and applicable to large and high-dimensional data sets.

Dimensionality Reduction

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