no code implementations • ICML 2020 • Ying Jin, Zhaoran Wang, Junwei Lu
We study the computational and statistical tradeoffs in inferring combinatorial structures of high dimensional simple zero-field ferromagnetic Ising model.
no code implementations • 25 Dec 2023 • Zhiwei Xu, Ziming Gan, Doudou Zhou, Shuting Shen, Junwei Lu, Tianxi Cai
The effective analysis of high-dimensional Electronic Health Record (EHR) data, with substantial potential for healthcare research, presents notable methodological challenges.
no code implementations • 25 Aug 2023 • Patrick Emedom-Nnamdi, Timothy R. Smith, Jukka-Pekka Onnela, Junwei Lu
Under this approach, we are able to locally approximate the action-value function and retrieve the nonlinear, independent contribution of select features as well as joint feature pairs.
no code implementations • 31 May 2023 • Junwei Lu, Jin Yin, Tianxi Cai
To overcome these challenges, we propose to infer the conditional dependency structure among EHR features via a latent graphical block model (LGBM).
1 code implementation • 19 May 2023 • Jun Wen, Jue Hou, Clara-Lea Bonzel, Yihan Zhao, Victor M. Castro, Vivian S. Gainer, Dana Weisenfeld, Tianrun Cai, Yuk-Lam Ho, Vidul A. Panickan, Lauren Costa, Chuan Hong, J. Michael Gaziano, Katherine P. Liao, Junwei Lu, Kelly Cho, Tianxi Cai
We propose a LAbel-efficienT incidenT phEnotyping (LATTE) algorithm to accurately annotate the timing of clinical events from longitudinal EHR data.
no code implementations • 28 Jan 2023 • Shuting Shen, Xi Chen, Ethan X. Fang, Junwei Lu
Assortment optimization has received active explorations in the past few decades due to its practical importance.
no code implementations • 11 Jun 2022 • Doudou Zhou, Yufeng Zhang, Aaron Sonabend-W, Zhaoran Wang, Junwei Lu, Tianxi Cai
Extensive simulations demonstrate the effectiveness of the proposed algorithm.
no code implementations • 1 Oct 2021 • Yue Liu, Ethan X. Fang, Junwei Lu
Our proposed method aims to infer general ranking properties of the BTL model.
no code implementations • 21 May 2021 • Doudou Zhou, Tianxi Cai, Junwei Lu
Besides, we prove the statistical rate for the eigenspace of the underlying matrix, which is comparable to the rate under the independently missing assumption.
1 code implementation • ICLR 2021 • Kaidi Cao, Yining Chen, Junwei Lu, Nikos Arechiga, Adrien Gaidon, Tengyu Ma
Real-world large-scale datasets are heteroskedastic and imbalanced -- labels have varying levels of uncertainty and label distributions are long-tailed.
Ranked #11 on Image Classification on WebVision-1000
2 code implementations • NeurIPS 2020 • Aaron Sonabend-W, Junwei Lu, Leo A. Celi, Tianxi Cai, Peter Szolovits
However, the adoption of such policies in practice is often challenging, as they are hard to interpret within the application context, and lack measures of uncertainty for the learned policy value and its decisions.
no code implementations • 28 May 2019 • Kean Ming Tan, Junwei Lu, Tong Zhang, Han Liu
To address this issue, neuroscientists have been measuring brain activity under natural viewing experiments in which the subjects are given continuous stimuli, such as watching a movie or listening to a story.
no code implementations • ICLR 2019 • Xingguo Li, Junwei Lu, Zhaoran Wang, Jarvis Haupt, Tuo Zhao
We propose a generalization error bound for a general family of deep neural networks based on the depth and width of the networks, as well as the spectral norm of weight matrices.
no code implementations • NeurIPS 2018 • Wei Sun, Junwei Lu, Han Liu
In order to test the hypotheses on their topological structures, we propose two adjacency matrix sketching frameworks: neighborhood sketching and subgraph sketching.
no code implementations • ICML 2018 • Hao Lu, Yuan Cao, Zhuoran Yang, Junwei Lu, Han Liu, Zhaoran Wang
We study the hypothesis testing problem of inferring the existence of combinatorial structures in undirected graphical models.
no code implementations • 13 Jun 2018 • Xingguo Li, Junwei Lu, Zhaoran Wang, Jarvis Haupt, Tuo Zhao
We establish a margin based data dependent generalization error bound for a general family of deep neural networks in terms of the depth and width, as well as the Jacobian of the networks.
no code implementations • 20 Sep 2017 • Cong Ma, Junwei Lu, Han Liu
Our framework is based on the Gaussian graphical models, under which ISA can be converted to the problem of estimation and inference of the inter-subject precision matrix.
no code implementations • 28 Jul 2017 • Junwei Lu, Matey Neykov, Han Liu
In this paper, we propose a new inferential framework for testing nested multiple hypotheses and constructing confidence intervals of the unknown graph invariants under undirected graphical models.
no code implementations • 29 Dec 2016 • Xingguo Li, Junwei Lu, Raman Arora, Jarvis Haupt, Han Liu, Zhaoran Wang, Tuo Zhao
We propose a general theory for studying the \xl{landscape} of nonconvex \xl{optimization} with underlying symmetric structures \tz{for a class of machine learning problems (e. g., low-rank matrix factorization, phase retrieval, and deep linear neural networks)}.
no code implementations • 10 Aug 2016 • Matey Neykov, Junwei Lu, Han Liu
We propose a new family of combinatorial inference problems for graphical models.
no code implementations • 28 Dec 2015 • Junwei Lu, Mladen Kolar, Han Liu
The testing procedures are based on a high dimensional, debiasing-free moment estimator, which uses a novel kernel smoothed Kendall's tau correlation matrix as an input statistic.
no code implementations • 23 Apr 2015 • Junwei Lu, Han Liu
We consider the problem of estimating undirected triangle-free graphs of high dimensional distributions.
no code implementations • 10 Mar 2015 • Junwei Lu, Mladen Kolar, Han Liu
We develop a novel procedure for constructing confidence bands for components of a sparse additive model.
no code implementations • 5 Feb 2015 • Will Wei Sun, Junwei Lu, Han Liu, Guang Cheng
We propose a novel sparse tensor decomposition method, namely Tensor Truncated Power (TTP) method, that incorporates variable selection into the estimation of decomposition components.