Search Results for author: Zhiwei Gao

Found 6 papers, 1 papers with code

Adaptive operator learning for infinite-dimensional Bayesian inverse problems

no code implementations27 Oct 2023 Zhiwei Gao, Liang Yan, Tao Zhou

To this end, we develop an adaptive operator learning framework that can reduce modeling error gradually by forcing the surrogate to be accurate in local areas.

Operator learning

Failure-informed adaptive sampling for PINNs, Part II: combining with re-sampling and subset simulation

no code implementations3 Feb 2023 Zhiwei Gao, Tao Tang, Liang Yan, Tao Zhou

The second extension is to present the subset simulation algorithm as the posterior model (instead of the truncated Gaussian model) for estimating the error indicator, which can more effectively estimate the failure probability and generate new effective training points in the failure region.

Failure-informed adaptive sampling for PINNs

no code implementations1 Oct 2022 Zhiwei Gao, Liang Yan, Tao Zhou

For instance, a fixed set of (prior chosen) training points may fail to capture the effective solution region (especially for problems with singularities).

A Variational Integrator for the Discrete Element Method

no code implementations2 Mar 2021 David N. De Klerk, Thomas Shire, Zhiwei Gao, Andrew T. McBride, Christopher J. Pearce, Paul Steinmann

A novel implicit integration scheme for the Discrete Element Method (DEM) based on the variational integrator approach is presented.

Numerical Analysis Soft Condensed Matter Numerical Analysis

Offensive Language Detection on Video Live Streaming Chat

no code implementations COLING 2020 Zhiwei Gao, Shuntaro Yada, Shoko Wakamiya, Eiji Aramaki

To make use of the similarity in offensive expressions among different social media platforms, we adopted state-of-the-art models trained on offensive expressions from Twitter for our Twitch data (i. e., transfer learning).

Transfer Learning

NAIST COVID: Multilingual COVID-19 Twitter and Weibo Dataset

1 code implementation17 Apr 2020 Zhiwei Gao, Shuntaro Yada, Shoko Wakamiya, Eiji Aramaki

This has affected the social life of people owing to enforcements, such as "social distancing" and "stay at home."

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