Search Results for author: Xinyu Zhao

Found 11 papers, 2 papers with code

Efficient Domain Coverage for Vehicles with Second Order Dynamics via Multi-Agent Reinforcement Learning

no code implementations11 Nov 2022 Xinyu Zhao, Razvan C. Fetecau, Mo Chen

To improve the stability of the learning-based policy and efficiency of exploration, we utilize an imitation loss based on the state-of-the-art classical control policy.

Multi-agent Reinforcement Learning

Contrastive Psudo-supervised Classification for Intra-Pulse Modulation of Radar Emitter Signals Using data augmentation

no code implementations13 Oct 2022 HanCong Feng, XinHai Yan, Kaili Jiang, Xinyu Zhao, Bin Tang

The automatic classification of radar waveform is a fundamental technique in electronic countermeasures (ECM). Recent supervised deep learning-based methods have achieved great success in a such classification task. However, those methods require enough labeled samples to work properly and in many circumstances, it is not available. To tackle this problem, in this paper, we propose a three-stages deep radar waveform clustering(DRSC) technique to automatically group the received signal samples without labels. Firstly, a pretext model is trained in a self-supervised way with the help of several data augmentation techniques to extract the class-dependent features. Next, the pseudo-supervised contrastive training is involved to further promote the separation between the extracted class-dependent features. And finally, the unsupervised problem is converted to a semi-supervised classification problem via pseudo label generation.

Classification Data Augmentation +1

Adaptive Partially-Observed Sequential Change Detection and Isolation

no code implementations9 Aug 2022 Xinyu Zhao, Jiuyun Hu, Yajun Mei, Hao Yan

High-dimensional data has become popular due to the easy accessibility of sensors in modern industrial applications.

Change Detection Change Point Detection

Deep Spatio-temporal Sparse Decomposition for Trend Prediction and Anomaly Detection in Cardiac Electrical Conduction

no code implementations20 Sep 2021 Xinyu Zhao, Hao Yan, Zhiyong Hu, Dongping Du

Electrical conduction among cardiac tissue is commonly modeled with partial differential equations, i. e., reaction-diffusion equation, where the reaction term describes cellular stimulation and diffusion term describes electrical propagation.

Anomaly Detection

Flexible Generation of Natural Language Deductions

1 code implementation EMNLP 2021 Kaj Bostrom, Xinyu Zhao, Swarat Chaudhuri, Greg Durrett

Natural language is an attractive representation for this purpose -- it is both highly expressive and easy for humans to understand.

Measurement of tunnel coupling in a Si double quantum dot based on charge sensing

no code implementations11 Mar 2021 Xinyu Zhao, Xuedong Hu

In Si quantum dots, valley degree of freedom, in particular the generally small valley splitting and the dot-dependent valley-orbit phase, adds complexities to the low-energy electron dynamics and the associated spin qubit manipulation.

Mesoscale and Nanoscale Physics Quantum Physics

Large eddy simulation/probability density function simulations of the Cambridge turbulent stratified flame series under swirling conditions

no code implementations1 Dec 2020 Hasret Turkeri, Xinyu Zhao, Metin Muradgolu

The parametric studies show that the differential diffusion has a negligible effect on the mean and r. m. s.

Fluid Dynamics

Effective Distant Supervision for Temporal Relation Extraction

2 code implementations EACL (AdaptNLP) 2021 Xinyu Zhao, Shih-ting Lin, Greg Durrett

A principal barrier to training temporal relation extraction models in new domains is the lack of varied, high quality examples and the challenge of collecting more.

Temporal Relation Extraction

Nutational resonances, transitional precession, and precession-averaged evolution in binary black-hole systems

no code implementations5 May 2017 Xinyu Zhao, Michael Kesden, Davide Gerosa

We use analytic solutions for generic spin precession at 2PN order to derive Fourier series for the total and orbital angular momenta in which each term is a sinusoid with frequency $\Omega - n\omega$ for integer $n$.

General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena

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