Search Results for author: Shenhao Wang

Found 14 papers, 5 papers with code

Spatiotemporal Graph Neural Networks with Uncertainty Quantification for Traffic Incident Risk Prediction

1 code implementation10 Sep 2023 Xiaowei Gao, Xinke Jiang, Dingyi Zhuang, Huanfa Chen, Shenhao Wang, James Haworth

This model strategically employs a compound model from the Tweedie family, as a Poisson distribution to model risk frequency and a Gamma distribution to account for incident severity.

Uncertainty Quantification

Fairness-enhancing deep learning for ride-hailing demand prediction

no code implementations10 Mar 2023 Yunhan Zheng, Qingyi Wang, Dingyi Zhuang, Shenhao Wang, Jinhua Zhao

When coupled with the bias mitigation regularization method, the de-biasing SA-Net effectively bridges the mean percentage prediction error gap between the disadvantaged and privileged groups, and also protects the disadvantaged regions against systematic underestimation of TNC demand.

Fairness

Uncertainty Quantification of Spatiotemporal Travel Demand with Probabilistic Graph Neural Networks

1 code implementation7 Mar 2023 Qingyi Wang, Shenhao Wang, Dingyi Zhuang, Haris Koutsopoulos, Jinhua Zhao

This Prob-GNN framework is substantiated by deterministic and probabilistic assumptions, and empirically applied to the task of predicting the transit and ridesharing demand in Chicago.

Uncertainty Quantification

Equality of opportunity in travel behavior prediction with deep neural networks and discrete choice models

1 code implementation25 Sep 2021 Yunhan Zheng, Shenhao Wang, Jinhua Zhao

Although researchers increasingly adopt machine learning to model travel behavior, they predominantly focus on prediction accuracy, ignoring the ethical challenges embedded in machine learning algorithms.

Discrete Choice Models Fairness

Estimating air quality co-benefits of energy transition using machine learning

no code implementations29 May 2021 Da Zhang, Qingyi Wang, Shaojie Song, Simiao Chen, MingWei Li, Lu Shen, Siqi Zheng, Bofeng Cai, Shenhao Wang

Applications of the framework with Chinese data reveal highly heterogeneous health benefits of reducing fossil fuel use in different sectors and regions in China with a mean of \$34/tCO2 and a standard deviation of \$84/tCO2.

BIG-bench Machine Learning

Comparing hundreds of machine learning classifiers and discrete choice models in predicting travel behavior: an empirical benchmark

no code implementations1 Feb 2021 Shenhao Wang, Baichuan Mo, Stephane Hess, Jinhua Zhao

The relative ranking of the ML and DCM classifiers is highly stable, while the absolute values of the prediction accuracy and computational time have large variations.

Computational Efficiency Discrete Choice Models +1

Theory-based residual neural networks: A synergy of discrete choice models and deep neural networks

no code implementations22 Oct 2020 Shenhao Wang, Baichuan Mo, Jinhua Zhao

However, the two methods are highly complementary because data-driven methods are more predictive but less interpretable and robust, while theory-driven methods are more interpretable and robust but less predictive.

Discrete Choice Models

Deep Neural Networks for Choice Analysis: Architectural Design with Alternative-Specific Utility Functions

no code implementations16 Sep 2019 Shenhao Wang, Baichuan Mo, Jinhua Zhao

Overall, this study demonstrates that prior behavioral knowledge could be used to guide the architecture design of DNN, to function as an effective domain-knowledge-based regularization method, and to improve both the interpretability and predictive power of DNN in choice analysis.

Multitask Learning Deep Neural Networks to Combine Revealed and Stated Preference Data

no code implementations2 Jan 2019 Shenhao Wang, Qingyi Wang, Jinhua Zhao

This study presents a framework of multitask learning deep neural networks (MTLDNNs) for this question, and demonstrates that MTLDNNs are more generic than the traditional nested logit (NL) method, due to its capacity of automatic feature learning and soft constraints.

Autonomous Vehicles

Deep Neural Networks for Choice Analysis: Extracting Complete Economic Information for Interpretation

no code implementations11 Dec 2018 Shenhao Wang, Qingyi Wang, Jinhua Zhao

To demonstrate the strength and challenges of DNNs, we estimated the DNNs using a stated preference survey, extracted the full list of economic information from the DNNs, and compared them with those from the DCMs.

Discrete Choice Models

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