Search Results for author: Shikai Fang

Found 12 papers, 9 papers with code

Physics-Guided Learning of Meteorological Dynamics for Weather Downscaling and Forecasting

1 code implementation20 May 2025 Yingtao Luo, Shikai Fang, Binqing Wu, Qingsong Wen, Liang Sun

Weather forecasting is essential but remains computationally intensive and physically incomplete in traditional numerical weather prediction (NWP) methods.

Deep Learning Weather Forecasting

R&D-Agent: Automating Data-Driven AI Solution Building Through LLM-Powered Automated Research, Development, and Evolution

1 code implementation20 May 2025 Xu Yang, Xiao Yang, Shikai Fang, Bowen Xian, Yuante Li, Jian Wang, Minrui Xu, Haoran Pan, Xinpeng Hong, Weiqing Liu, Yelong Shen, Weizhu Chen, Jiang Bian

Recent advances in AI and ML have transformed data science, yet increasing complexity and expertise requirements continue to hinder progress.

Generating Full-field Evolution of Physical Dynamics from Irregular Sparse Observations

no code implementations14 May 2025 Panqi Chen, Yifan Sun, Lei Cheng, Yang Yang, Weichang Li, Yang Liu, Weiqing Liu, Jiang Bian, Shikai Fang

To fill the gaps, we present SDIFT, Sequential DIffusion in Functional Tucker space, a novel framework that generates full-field evolution of physical dynamics from irregular sparse observations.

Computational Efficiency Denoising

Functional Complexity-adaptive Temporal Tensor Decomposition

no code implementations10 Feb 2025 Panqi Chen, Lei Cheng, Jianlong Li, Weichang Li, Weiqing Liu, Jiang Bian, Shikai Fang

While recent works on temporal tensor decomposition have made significant progress by incorporating continuous timestamps in latent factors, they still struggle with general tensor data with continuous indexes not only in the temporal mode but also in other modes, such as spatial coordinates in climate data.

Tensor Decomposition Variational Inference

MarS: a Financial Market Simulation Engine Powered by Generative Foundation Model

1 code implementation4 Sep 2024 Junjie Li, Yang Liu, Weiqing Liu, Shikai Fang, Lewen Wang, Chang Xu, Jiang Bian

Generative models aim to simulate realistic effects of various actions across different contexts, from text generation to visual effects.

Language Modeling Language Modelling +1

Diffusion-Generative Multi-Fidelity Learning for Physical Simulation

no code implementations9 Nov 2023 Zheng Wang, Shibo Li, Shikai Fang, Shandian Zhe

We propose a conditional score model to control the solution generation by the input parameters and the fidelity.

Denoising

Functional Bayesian Tucker Decomposition for Continuous-indexed Tensor Data

1 code implementation8 Nov 2023 Shikai Fang, Xin Yu, Zheng Wang, Shibo Li, Mike Kirby, Shandian Zhe

To generalize Tucker decomposition to such scenarios, we propose Functional Bayesian Tucker Decomposition (FunBaT).

Gaussian Processes

Solving High Frequency and Multi-Scale PDEs with Gaussian Processes

1 code implementation8 Nov 2023 Shikai Fang, Madison Cooley, Da Long, Shibo Li, Robert Kirby, Shandian Zhe

Machine learning based solvers have garnered much attention in physical simulation and scientific computing, with a prominent example, physics-informed neural networks (PINNs).

Computational Efficiency Gaussian Processes

BayOTIDE: Bayesian Online Multivariate Time series Imputation with functional decomposition

1 code implementation28 Aug 2023 Shikai Fang, Qingsong Wen, Yingtao Luo, Shandian Zhe, Liang Sun

More importantly, almost all methods assume the observations are sampled at regular time stamps, and fail to handle complex irregular sampled time series arising from different applications.

Computational Efficiency Gaussian Processes +4

Provably Convergent Schrödinger Bridge with Applications to Probabilistic Time Series Imputation

1 code implementation12 May 2023 Yu Chen, Wei Deng, Shikai Fang, Fengpei Li, Nicole Tianjiao Yang, Yikai Zhang, Kashif Rasul, Shandian Zhe, Anderson Schneider, Yuriy Nevmyvaka

We show that optimizing the transport cost improves the performance and the proposed algorithm achieves the state-of-the-art result in healthcare and environmental data while exhibiting the advantage of exploring both temporal and feature patterns in probabilistic time series imputation.

Imputation Missing Values +1

Analysis of Multivariate Scoring Functions for Automatic Unbiased Learning to Rank

1 code implementation20 Aug 2020 Tao Yang, Shikai Fang, Shibo Li, Yulan Wang, Qingyao Ai

Because click data is often noisy and biased, a variety of methods have been proposed to construct unbiased learning to rank (ULTR) algorithms for the learning of unbiased ranking models.

Information Retrieval Learning-To-Rank +1

Streaming Probabilistic Deep Tensor Factorization

1 code implementation14 Jul 2020 Shikai Fang, Zheng Wang, Zhimeng Pan, Ji Liu, Shandian Zhe

Our algorithm provides responsive incremental updates for the posterior of the latent factors and NN weights upon receiving new tensor entries, and meanwhile select and inhibit redundant/useless weights.

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