Search Results for author: Chaopeng Shen

Found 18 papers, 6 papers with code

Probing the limit of hydrologic predictability with the Transformer network

no code implementations21 Jun 2023 Jiangtao Liu, Yuchen Bian, Chaopeng Shen

While the Transformer results are not higher than current state-of-the-art, we still learned some valuable lessons: (1) the vanilla Transformer architecture is not suitable for hydrologic modeling; (2) the proposed recurrence-free modification can improve Transformer performance so future work can continue to test more of such modifications; and (3) the prediction limits on the dataset should be close to the current state-of-the-art model.

PatchRefineNet: Improving Binary Segmentation by Incorporating Signals from Optimal Patch-wise Binarization

1 code implementation12 Nov 2022 Savinay Nagendra, Chaopeng Shen, Daniel Kifer

Given the logit scores produced by the base segmentation model, each pixel is given a pseudo-label that is obtained by optimally thresholding the logit scores in each image patch.

Binarization Few-Shot Semantic Segmentation +5

Differentiable, learnable, regionalized process-based models with physical outputs can approach state-of-the-art hydrologic prediction accuracy

no code implementations28 Mar 2022 Dapeng Feng, Jiangtao Liu, Kathryn Lawson, Chaopeng Shen

Without using an ensemble or post-processor, {\delta} models can obtain a median Nash Sutcliffe efficiency of 0. 732 for 671 basins across the USA for the Daymet forcing dataset, compared to 0. 748 from a state-of-the-art LSTM model with the same setup.

Management

Bathymetry Inversion using a Deep-Learning-Based Surrogate for Shallow Water Equations Solvers

1 code implementation5 Mar 2022 Xiaofeng Liu, Yalan Song, Chaopeng Shen

We also found the surrogate architecture (whether with both velocity and water surface elevation or velocity only as outputs) does not show significant impact on inversion result.

Management

A Robust Statistical Analysis of the Role of Hydropower on the System Electricity Price and Price Volatility

no code implementations4 Mar 2022 Olukunle O. Owolabi, Kathryn Lawson, Sanhita Sengupta, Yingsi Huang, Lan Wang, Chaopeng Shen, Mila Getmansky Sherman, Deborah A. Sunter

Hydroelectric power (hydropower) is unique in that it can function as both a conventional source of electricity and as backup storage (pumped hydroelectric storage) for providing energy in times of high demand on the grid.

regression

Surrogate Model for Shallow Water Equations Solvers with Deep Learning

1 code implementation20 Dec 2021 Yalan Song, Chaopeng Shen, Xiaofeng Liu

The new method was evaluated and compared against existing methods based on convolutional neural networks (CNNs), which can only make image-to-image predictions on structured or regular meshes.

Critical Risk Indicators (CRIs) for the electric power grid: A survey and discussion of interconnected effects

1 code implementation19 Jan 2021 Judy P. Che-Castaldo, Rémi Cousin, Stefani Daryanto, Grace Deng, Mei-Ling E. Feng, Rajesh K. Gupta, Dezhi Hong, Ryan M. McGranaghan, Olukunle O. Owolabi, Tianyi Qu, Wei Ren, Toryn L. J. Schafer, Ashutosh Sharma, Chaopeng Shen, Mila Getmansky Sherman, Deborah A. Sunter, Lan Wang, David S. Matteson

We also provide relevant critical risk indicators (CRIs) across diverse domains that may influence electric power grid risks, including climate, ecology, hydrology, finance, space weather, and agriculture.

Applications

The data synergy effects of time-series deep learning models in hydrology

no code implementations6 Jan 2021 Kuai Fang, Daniel Kifer, Kathryn Lawson, Dapeng Feng, Chaopeng Shen

We hypothesize that DL models automatically adjust their internal representations to identify commonalities while also providing sufficient discriminatory information to the model.

Time Series Time Series Analysis

Prediction in ungauged regions with sparse flow duration curves and input-selection ensemble modeling

1 code implementation26 Nov 2020 Dapeng Feng, Kathryn Lawson, Chaopeng Shen

While long short-term memory (LSTM) models have demonstrated stellar performance with streamflow predictions, there are major risks in applying these models in contiguous regions with no gauges, or predictions in ungauged regions (PUR) problems.

From calibration to parameter learning: Harnessing the scaling effects of big data in geoscientific modeling

no code implementations30 Jul 2020 Wen-Ping Tsai, Dapeng Feng, Ming Pan, Hylke Beck, Kathryn Lawson, Yuan Yang, Jiangtao Liu, Chaopeng Shen

The behaviors and skills of models in many geosciences (e. g., hydrology and ecosystem sciences) strongly depend on spatially-varying parameters that need calibration.

Enhancing streamflow forecast and extracting insights using long-short term memory networks with data integration at continental scales

no code implementations18 Dec 2019 Dapeng Feng, Kuai Fang, Chaopeng Shen

DI was most beneficial in regions with high flow autocorrelation: it greatly reduced baseflow bias in groundwater-dominated western basins and also improved peak prediction for basins with dynamical surface water storage, such as the Prairie Potholes or Great Lakes regions.

Data Integration

Evaluating aleatoric and epistemic uncertainties of time series deep learning models for soil moisture predictions

no code implementations10 Jun 2019 Kuai Fang, Chaopeng Shen, Daniel Kifer

Soil moisture is an important variable that determines floods, vegetation health, agriculture productivity, and land surface feedbacks to the atmosphere, etc.

Time Series Time Series Analysis

A trans-disciplinary review of deep learning research for water resources scientists

no code implementations6 Dec 2017 Chaopeng Shen

I argue that DL can help address several major new and old challenges facing research in water sciences such as inter-disciplinarity, data discoverability, hydrologic scaling, equifinality, and needs for parameter regionalization.

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