1 code implementation • 8 May 2024 • Hengyue Liang, Le Peng, Ju Sun

In selective classification (SC), a classifier abstains from making predictions that are likely to be wrong to avoid excessive errors.

no code implementations • 18 Mar 2024 • Wenjie Zhang, Yuxiang Wan, Zhong Zhuang, Ju Sun

For nonlinear inverse problems that are prevalent in imaging science, symmetries in the forward model are common.

no code implementations • 16 Oct 2023 • Chuan He, Le Peng, Ju Sun

In practice, many machine learning (ML) problems come with constraints, and their applied domains involve distributed sensitive data that cannot be shared with others, e. g., in healthcare.

2 code implementations • 20 Jul 2023 • Le Peng, Gaoxiang Luo, Sicheng Zhou, jiandong chen, Rui Zhang, Ziyue Xu, Ju Sun

Language models (LMs) such as BERT and GPT have revolutionized natural language processing (NLP).

no code implementations • 23 Mar 2023 • Hengyue Liang, Buyun Liang, Le Peng, Ying Cui, Tim Mitchell, Ju Sun

Taking advantage of PWCF and other existing numerical algorithms, we further explore the distinct patterns in the solutions found for solving these optimization problems using various combinations of losses, perturbation models, and optimization algorithms.

1 code implementation • 23 Mar 2023 • Bhargav Joshi, Taihui Li, Buyun Liang, Roger Rusack, Ju Sun

The transparency of each crystal is monitored with a laser monitoring system that tracks changes in the optical properties of the crystals due to radiation from the collision products.

no code implementations • 15 Mar 2023 • Sicheng Zhou, Nan Wang, LiWei Wang, Ju Sun, Anne Blaes, Hongfang Liu, Rui Zhang

We developed three types of NLP models (i. e., conditional random field, bi-directional long short-term memory and CancerBERT) to extract cancer phenotypes from clinical texts.

no code implementations • 6 Mar 2023 • Taihui Li, Hengkang Wang, Peng Le, XianE Tang, Ju Sun

Robust PCA is a standard tool for learning a linear subspace in the presence of sparse corruption or rare outliers.

no code implementations • 17 Feb 2023 • Yash Travadi, Le Peng, Xuan Bi, Ju Sun, Mochen Yang

However, the economic considerations of the clients, such as fairness and incentive, are yet to be fully explored.

2 code implementations • 15 Feb 2023 • Hengkang Wang, Han Lu, Ju Sun, Sandra E Safo

We propose iDeepViewLearn (Interpretable Deep Learning Method for Multiview Learning) for learning nonlinear relationships in data from multiple views while achieving feature selection.

1 code implementation • CVPR 2023 • Taihui Li, Hengkang Wang, Zhong Zhuang, Ju Sun

Deep image prior (DIP) has shown great promise in tackling a variety of image restoration (IR) and general visual inverse problems, needing no training data.

no code implementations • 2 Nov 2022 • Zhong Zhuang, David Yang, Felix Hofmann, David Barmherzig, Ju Sun

Phase retrieval (PR) concerns the recovery of complex phases from complex magnitudes.

no code implementations • 21 Oct 2022 • Le Peng, Yash Travadi, Rui Zhang, Ying Cui, Ju Sun

We propose performing imbalanced classification by regrouping majority classes into small classes so that we turn the problem into balanced multiclass classification.

no code implementations • 3 Oct 2022 • Buyun Liang, Tim Mitchell, Ju Sun

Imposing explicit constraints is relatively new but increasingly pressing in deep learning, stimulated by, e. g., trustworthy AI that performs robust optimization over complicated perturbation sets and scientific applications that need to respect physical laws and constraints.

no code implementations • 2 Oct 2022 • Hengyue Liang, Buyun Liang, Ying Cui, Tim Mitchell, Ju Sun

Empirical evaluation of deep learning models against adversarial attacks entails solving nontrivial constrained optimization problems.

1 code implementation • 18 Aug 2022 • Zhong Zhuang, Taihui Li, Hengkang Wang, Ju Sun

Blind image deblurring (BID) has been extensively studied in computer vision and adjacent fields.

1 code implementation • 11 Dec 2021 • Hengkang Wang, Taihui Li, Zhong Zhuang, Tiancong Chen, Hengyue Liang, Ju Sun

In this regard, the majority of DIP works for vision tasks only demonstrates the potential of the models -- reporting the peak performance against the ground truth, but provides no clue about how to operationally obtain near-peak performance without access to the groundtruth.

1 code implementation • 27 Nov 2021 • Buyun Liang, Tim Mitchell, Ju Sun

GRANSO is among the first optimization solvers targeting general nonsmooth NCVX problems with nonsmooth constraints, but, as it is implemented in MATLAB and requires the user to provide analytical gradients, GRANSO is often not a convenient choice in machine learning (especially deep learning) applications.

2 code implementations • 23 Oct 2021 • Taihui Li, Zhong Zhuang, Hengyue Liang, Le Peng, Hengkang Wang, Ju Sun

Recent works have shown the surprising effectiveness of deep generative models in solving numerous image reconstruction (IR) tasks, even without training data.

2 code implementations • 9 Jun 2021 • Le Peng, Hengyue Liang, Gaoxiang Luo, Taihui Li, Ju Sun

Transfer learning (TL) from pretrained deep models is a standard practice in modern medical image classification (MIC).

no code implementations • 9 Jun 2021 • Kshitij Tayal, Raunak Manekar, Zhong Zhuang, David Yang, Vipin Kumar, Felix Hofmann, Ju Sun

Several deep learning methods for phase retrieval exist, but most of them fail on realistic data without precise support information.

no code implementations • 3 Jun 2021 • Ju Sun, Le Peng, Taihui Li, Dyah Adila, Zach Zaiman, Genevieve B. Melton, Nicholas Ingraham, Eric Murray, Daniel Boley, Sean Switzer, John L. Burns, Kun Huang, Tadashi Allen, Scott D. Steenburg, Judy Wawira Gichoya, Erich Kummerfeld, Christopher Tignanelli

Conclusions and Relevance: AI-based diagnostic tools may serve as an adjunct, but not replacement, for clinical decision support of COVID-19 diagnosis, which largely hinges on exposure history, signs, and symptoms.

no code implementations • 24 May 2021 • David A. Barmherzig, Ju Sun

A new algorithmic framework is presented for holographic phase retrieval via maximum likelihood optimization, which allows for practical and robust image reconstruction.

no code implementations • 23 Oct 2020 • Raunak Manekar, Zhong Zhuang, Kshitij Tayal, Vipin Kumar, Ju Sun

Phase retrieval (PR) consists of estimating 2D or 3D objects from their Fourier magnitudes and takes a central place in scientific imaging.

no code implementations • 23 Oct 2020 • Kshitij Tayal, Chieh-Hsin Lai, Raunak Manekar, Zhong Zhuang, Vipin Kumar, Ju Sun

In many physical systems, inputs related by intrinsic system symmetries generate the same output.

no code implementations • 20 Mar 2020 • Kshitij Tayal, Chieh-Hsin Lai, Vipin Kumar, Ju Sun

In many physical systems, inputs related by intrinsic system symmetries are mapped to the same output.

no code implementations • 7 Feb 2019 • David A. Barmherzig, Ju Sun, Emmanuel J. Candès, T. J. Lane, Po-Nan Li

A new reference design is introduced for holographic coherent diffraction imaging.

1 code implementation • ICLR 2019 • Yu Bai, Qijia Jiang, Ju Sun

This paper concerns dictionary learning, i. e., sparse coding, a fundamental representation learning problem.

no code implementations • 10 Aug 2018 • Li Shen, Congliang Chen, Fangyu Zou, Zequn Jie, Ju Sun, Wei Liu

Integrating adaptive learning rate and momentum techniques into SGD leads to a large class of efficiently accelerated adaptive stochastic algorithms, such as AdaGrad, RMSProp, Adam, AccAdaGrad, \textit{etc}.

no code implementations • 6 Dec 2017 • David Barmherzig, Ju Sun

While convergence of the Alternating Direction Method of Multipliers (ADMM) on convex problems is well studied, convergence on nonconvex problems is only partially understood.

1 code implementation • 22 Feb 2016 • Ju Sun, Qing Qu, John Wright

complex Gaussian) and the number of measurements is large enough ($m \ge C n \log^3 n$), with high probability, a natural least-squares formulation for GPR has the following benign geometric structure: (1) there are no spurious local minimizers, and all global minimizers are equal to the target signal $\mathbf x$, up to a global phase; and (2) the objective function has a negative curvature around each saddle point.

no code implementations • 15 Nov 2015 • Ju Sun, Qing Qu, John Wright

We consider the problem of recovering a complete (i. e., square and invertible) matrix $\mathbf A_0$, from $\mathbf Y \in \mathbb{R}^{n \times p}$ with $\mathbf Y = \mathbf A_0 \mathbf X_0$, provided $\mathbf X_0$ is sufficiently sparse.

no code implementations • 11 Nov 2015 • Ju Sun, Qing Qu, John Wright

We give the first efficient algorithm that provably recovers $\mathbf A_0$ when $\mathbf X_0$ has $O(n)$ nonzeros per column, under suitable probability model for $\mathbf X_0$.

3 code implementations • 21 Oct 2015 • Ju Sun, Qing Qu, John Wright

In this note, we focus on smooth nonconvex optimization problems that obey: (1) all local minimizers are also global; and (2) around any saddle point or local maximizer, the objective has a negative directional curvature.

1 code implementation • 26 Apr 2015 • Ju Sun, Qing Qu, John Wright

We consider the problem of recovering a complete (i. e., square and invertible) matrix $\mathbf A_0$, from $\mathbf Y \in \mathbb R^{n \times p}$ with $\mathbf Y = \mathbf A_0 \mathbf X_0$, provided $\mathbf X_0$ is sufficiently sparse.

1 code implementation • NeurIPS 2014 • Qing Qu, Ju Sun, John Wright

In this paper, we focus on a **planted sparse model** for the subspace: the target sparse vector is embedded in an otherwise random subspace.

no code implementations • 2 Aug 2012 • Ju Sun, Yuqian Zhang, John Wright

Motivated by vision tasks such as robust face and object recognition, we consider the following general problem: given a collection of low-dimensional linear subspaces in a high-dimensional ambient (image) space, and a query point (image), efficiently determine the nearest subspace to the query in $\ell^1$ distance.

1 code implementation • 14 Oct 2010 • Guangcan Liu, Zhouchen Lin, Shuicheng Yan, Ju Sun, Yong Yu, Yi Ma

In this work we address the subspace recovery problem.

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