Search Results for author: Lili Zheng

Found 9 papers, 1 papers with code

Context-dependent self-exciting point processes: models, methods, and risk bounds in high dimensions

no code implementations16 Mar 2020 Lili Zheng, Garvesh Raskutti, Rebecca Willett, Benjamin Mark

High-dimensional autoregressive point processes model how current events trigger or inhibit future events, such as activity by one member of a social network can affect the future activity of his or her neighbors.

Point Processes Time Series +1

Stochastic Gradient Descent in Correlated Settings: A Study on Gaussian Processes

no code implementations NeurIPS 2020 Hao Chen, Lili Zheng, Raed Al Kontar, Garvesh Raskutti

Stochastic gradient descent (SGD) and its variants have established themselves as the go-to algorithms for large-scale machine learning problems with independent samples due to their generalization performance and intrinsic computational advantage.

Gaussian Processes

Gaussian Process Inference Using Mini-batch Stochastic Gradient Descent: Convergence Guarantees and Empirical Benefits

no code implementations19 Nov 2021 Hao Chen, Lili Zheng, Raed Al Kontar, Garvesh Raskutti

Stochastic gradient descent (SGD) and its variants have established themselves as the go-to algorithms for large-scale machine learning problems with independent samples due to their generalization performance and intrinsic computational advantage.

Model-Agnostic Confidence Intervals for Feature Importance: A Fast and Powerful Approach Using Minipatch Ensembles

no code implementations5 Jun 2022 Luqin Gan, Lili Zheng, Genevera I. Allen

Our approach is fast as we avoid model refitting by leveraging a form of random observation and feature subsampling called minipatch ensembles; this approach also improves statistical power by avoiding data splitting.

BIG-bench Machine Learning Ensemble Learning +2

DASECount: Domain-Agnostic Sample-Efficient Wireless Indoor Crowd Counting via Few-shot Learning

no code implementations18 Nov 2022 Huawei Hou, Suzhi Bi, Lili Zheng, Xiaohui Lin, Yuan Wu, Zhi Quan

In this paper, we propose a Domain-Agnostic and Sample-Efficient wireless indoor crowd Counting (DASECount) framework that suffices to attain robust cross-domain detection accuracy given very limited data samples in new domains.

Crowd Counting Few-Shot Learning +1

Nonparanormal Graph Quilting with Applications to Calcium Imaging

no code implementations22 May 2023 Andersen Chang, Lili Zheng, Gautam Dasarthy, Genevera I. Allen

Probabilistic graphical models have become an important unsupervised learning tool for detecting network structures for a variety of problems, including the estimation of functional neuronal connectivity from two-photon calcium imaging data.

Interpretable Machine Learning for Discovery: Statistical Challenges \& Opportunities

no code implementations2 Aug 2023 Genevera I. Allen, Luqin Gan, Lili Zheng

In this paper, we discuss and review the field of interpretable machine learning, focusing especially on the techniques as they are often employed to generate new knowledge or make discoveries from large data sets.

Interpretable Machine Learning Model Selection +1

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