no code implementations • 9 Dec 2023 • Taijie Chen, Zijian Shen, Siyuan Feng, Linchuan Yang, Jintao Ke
To simultaneously maximize multiple system performance metrics for matching radius determination, we devise a novel multi-task learning algorithm that enhances convergence speed of each task (corresponding to the optimization of one metric) and delivers more accurate overall predictions.
no code implementations • 21 Aug 2023 • Wang Chen, Jintao Ke, Xiqun Chen
The simulation platform integrates a traffic emission model and a speed-density traffic flow model to characterize the interactions between traffic congestion levels and emissions.
1 code implementation • 12 May 2023 • Wang Chen, Jintao Ke, Linchuan Yang
Dynamic ride-sharing services, including ride-pooling offered by ride-hailing platforms and demand-responsive buses, have become an essential part of urban mobility systems.
1 code implementation • 22 Mar 2023 • Siyuan Feng, Taijie Chen, Yuhao Zhang, Jintao Ke, Zhengfei Zheng, Hai Yang
In addition, the existing simulators still face many challenges, ranging from their closeness to real environments of ride-sourcing systems, to the completeness of different tasks they can implement.
no code implementations • 11 Nov 2020 • Jintao Ke, Siyuan Feng, Zheng Zhu, Hai Yang, Jieping Ye
To address this issue, we propose a deep multi-task multi-graph learning approach, which combines two components: (1) multiple multi-graph convolutional (MGC) networks for predicting demands for different service modes, and (2) multi-task learning modules that enable knowledge sharing across multiple MGC networks.
1 code implementation • 17 Oct 2019 • Jintao Ke, Xiaoran Qin, Hai Yang, Zhengfei Zheng, Zheng Zhu, Jieping Ye
To overcome this challenge, we propose the Spatio-Temporal Encoder-Decoder Residual Multi-Graph Convolutional network (ST-ED-RMGC), a novel deep learning model for predicting ride-sourcing demand of various OD pairs.
1 code implementation • 23 Feb 2018 • Huaxiu Yao, Fei Wu, Jintao Ke, Xianfeng Tang, Yitian Jia, Siyu Lu, Pinghua Gong, Jieping Ye, Zhenhui Li
Traditional demand prediction methods mostly rely on time series forecasting techniques, which fail to model the complex non-linear spatial and temporal relations.
no code implementations • 11 Feb 2018 • Jintao Ke, Shuaichao Zhang, Hai Yang, Xiqun Chen
However, few research focuses on the missing data imputation in real-time crash likelihood prediction, although missing values are commonly observed due to breakdown of sensors or external interference.
no code implementations • 20 Jun 2017 • Jintao Ke, Hongyu Zheng, Hai Yang, Xiqun, Chen
The fusion of convolutional techniques and the LSTM network enables the proposed DL approach to better capture the spatio-temporal characteristics and correlations of explanatory variables.
no code implementations • 23 May 2017 • Leye Wang, Xu Geng, Jintao Ke, Chen Peng, Xiaojuan Ma, Daqing Zhang, Qiang Yang
Finally, we use the resulting ensemble of RF and CNN to identify the ridesourcing cars in the candidate pool.