User profiles for Chenhao Niu

Chenhao Niu

AI Research Engineer at Duolingo
Verified email at andrew.cmu.edu
Cited by 1476

Robust anomaly detection for multivariate time series through stochastic recurrent neural network

Y Su, Y Zhao, C Niu, R Liu, W Sun, D Pei - Proceedings of the 25th ACM …, 2019 - dl.acm.org
Industry devices (ie, entities) such as server machines, spacecrafts, engines, etc., are typically
monitored with multivariate time series, whose anomaly detection is critical for an entity's …

Permutation invariant graph generation via score-based generative modeling

C Niu, Y Song, J Song, S Zhao… - International …, 2020 - proceedings.mlr.press
Learning generative models for graph-structured data is challenging because graphs are
discrete, combinatorial, and the underlying data distribution is invariant to the ordering of nodes…

CoFlux: robustly correlating KPIs by fluctuations for service troubleshooting

…, W Xia, R Liu, J Bu, J Zhu, Y Cao, H Li, C Niu… - Proceedings of the …, 2019 - dl.acm.org
Internet-based service companies monitor a large number of KPIs (Key Performance
Indicators) to ensure their service quality and reliability. Correlating KPIs by fluctuations reveals …

Enhanced mutual information neural estimators for optical fiber communication

Z Niu, C Dai, H Yang, C Zeng, Z He, W Hu, L Yi - Optics Letters, 2024 - opg.optica.org
The accurate estimation of mutual information (MI) plays a vital role in understanding
channel capacity and optimizing the performance of optical communications. While MI …

Landslide sensitivity assessment of coal mining subsidence areas based on information value-machine learning coupling models

NIU Chenhao, J Runcheng… - Coal Geology & …, 2024 - cge.researchcommons.org
Objective Due to their special geological conditions and coal mining background, coal mining
subsidence areas are prone to suffer from ground cracks and subsidence, which tend to …

[HTML][HTML] Multi-Objective Optimization for the Forming Quality of a CeO2/Al6061 Alloy as an Aluminum–Air Battery Anode Manufactured via Selective Laser Melting

G Peng, C Niu, Y Geng, W Duan, S Cao - Crystals, 2024 - mdpi.com
To improve the discharge performance of aluminum–air batteries, CeO 2 /Al6061 composites
were prepared as an anode using selective laser melting (SLM). Response surface …

[HTML][HTML] Sedimentary structure of the western Bohai Bay basin and other basins in North China revealed by frequency dependent P-wave particle motion

C Yang, F Niu - Geodesy and Geodynamics, 2019 - Elsevier
High-resolution seismic models of sediment basins are critical inputs for earthquake ground
motion prediction and petroleum resource exploration. In this study we employed a newly …

[PDF][PDF] A simple and general graph neural network with stochastic message passing

Z Zhang, C Niu, P Cui, B Zhang… - arXiv preprint arXiv …, 2020 - pengcui.thumedialab.com
Graph neural networks (GNNs) are emerging machine learning models on graphs. One key
property behind the expressiveness of existing GNNs is that the learned node …

AI-assisted Gaze Detection for Proctoring Online Exams

YS Shih, Z Zhao, C Niu, B Iberg, J Sharpnack… - arXiv preprint arXiv …, 2024 - arxiv.org
For high-stakes online exams, it is important to detect potential rule violations to ensure the
security of the test. In this study, we investigate the task of detecting whether test takers are …

Continuous measurement of stress‐induced travel‐time variations at SAFOD

C Yang, F Niu, TM Daley… - Seismological …, 2019 - pubs.geoscienceworld.org
In situ stress measurement at seismogenic depth is critically important for deciphering fault
zone processes. In this study, we conducted a second active‐source crosswell field …