no code implementations • 16 Aug 2023 • Xianfeng Jiao, Zizhong Li, Chang Xu, Yang Liu, Weiqing Liu, Jiang Bian
To address these challenges, we propose a novel framework that aims to effectively extract essential factors from order flow data for diverse downstream tasks across different granularities and scenarios.
no code implementations • 6 Jul 2023 • Yuchen Fang, Zhenggang Tang, Kan Ren, Weiqing Liu, Li Zhao, Jiang Bian, Dongsheng Li, Weinan Zhang, Yong Yu, Tie-Yan Liu
Order execution is a fundamental task in quantitative finance, aiming at finishing acquisition or liquidation for a number of trading orders of the specific assets.
no code implementations • 17 May 2023 • Sarthak Ahuja, Mohammad Kachuee, Fateme Sheikholeslami, Weiqing Liu, Jaeyoung Do
Off-Policy reinforcement learning has been a driving force for the state-of-the-art conversational AIs leading to more natural humanagent interactions and improving the user satisfaction for goal-oriented agents.
no code implementations • 3 Sep 2022 • Yingtao Luo, Chang Xu, Yang Liu, Weiqing Liu, Shun Zheng, Jiang Bian
In this work, we propose an learning framework that can automatically obtain interpretable PDE models from sequential data.
no code implementations • 19 May 2022 • Zhengyu Yang, Kan Ren, Xufang Luo, Minghuan Liu, Weiqing Liu, Jiang Bian, Weinan Zhang, Dongsheng Li
Considering the great performance of ensemble methods on both accuracy and generalization in supervised learning (SL), we design a robust and applicable method named Ensemble Proximal Policy Optimization (EPPO), which learns ensemble policies in an end-to-end manner.
1 code implementation • 11 Jan 2022 • Wendi Li, Xiao Yang, Weiqing Liu, Yingce Xia, Jiang Bian
To handle concept drift, previous methods first detect when/where the concept drift happens and then adapt models to fit the distribution of the latest data.
1 code implementation • 12 Dec 2021 • Wentao Xu, Yingce Xia, Weiqing Liu, Jiang Bian, Jian Yin, Tie-Yan Liu
Next, we use a tree-attention aggregator to incorporate the graph structure information into the aggregation module on the meta-path.
2 code implementations • COLING 2022 • Zhiping Luo, Wentao Xu, Weiqing Liu, Jiang Bian, Jian Yin, Tie-Yan Liu
Learning the embeddings of knowledge graphs (KG) is vital in artificial intelligence, and can benefit various downstream applications, such as recommendation and question answering.
2 code implementations • 26 Oct 2021 • Wentao Xu, Weiqing Liu, Lewen Wang, Yingce Xia, Jiang Bian, Jian Yin, Tie-Yan Liu
To overcome the shortcomings of previous work, we proposed a novel stock trend forecasting framework that can adequately mine the concept-oriented shared information from predefined concepts and hidden concepts.
no code implementations • 29 Sep 2021 • Xiaobo Liang, Runze Mao, Lijun Wu, Juntao Li, Weiqing Liu, Qing Li, Min Zhang
The common approach of consistency training is performed on the data-level, which typically utilizes the data augmentation strategy (or adversarial training) to make the predictions from the augmented input and the original input to be consistent, so that the model is more robust and attains better generalization ability.
no code implementations • 29 Sep 2021 • Zhengyu Yang, Kan Ren, Xufang Luo, Weiqing Liu, Jiang Bian, Weinan Zhang, Dongsheng Li
Ensemble learning, which can consistently improve the prediction performance in supervised learning, has drawn increasing attentions in reinforcement learning (RL).
1 code implementation • 14 Sep 2021 • Wentao Xu, Weiqing Liu, Jiang Bian, Jian Yin, Tie-Yan Liu
In this paper, we propose a simple yet efficient instance-wise graph-based framework to utilize the inter-dependencies of different variables at different time stamps for multivariate time series forecasting.
no code implementations • 12 Jul 2021 • Hengxu Lin, Dong Zhou, Weiqing Liu, Jiang Bian
Modeling and managing portfolio risk is perhaps the most important step to achieve growing and preserving investment performance.
2 code implementations • 24 Jun 2021 • Hengxu Lin, Dong Zhou, Weiqing Liu, Jiang Bian
In this paper, we propose a novel architecture, Temporal Routing Adaptor (TRA), to empower existing stock prediction models with the ability to model multiple stock trading patterns.
no code implementations • 8 Mar 2021 • Xia Hu, Lingyang Chu, Jian Pei, Weiqing Liu, Jiang Bian
Model complexity is a fundamental problem in deep learning.
no code implementations • 15 Feb 2021 • Wentao Xu, Weiqing Liu, Chang Xu, Jiang Bian, Jian Yin, Tie-Yan Liu
To remedy the first shortcoming, we propose to model the stock context and learn the effect of event information on the stocks under different contexts.
no code implementations • 28 Jan 2021 • Yuchen Fang, Kan Ren, Weiqing Liu, Dong Zhou, Weinan Zhang, Jiang Bian, Yong Yu, Tie-Yan Liu
As a fundamental problem in algorithmic trading, order execution aims at fulfilling a specific trading order, either liquidation or acquirement, for a given instrument.
1 code implementation • 1 Jan 2021 • Xueqing Wu, Yingce Xia, Lijun Wu, Shufang Xie, Weiqing Liu, Tao Qin, Tie-Yan Liu
For wait-k inference, we observe that wait-m training with $m>k$ in simultaneous NMT (i. e., using more future information for training than inference) generally outperforms wait-k training.
1 code implementation • 11 Dec 2020 • Hongshun Tang, Lijun Wu, Weiqing Liu, Jiang Bian
Stock trend forecasting has become a popular research direction that attracts widespread attention in the financial field.
2 code implementations • 22 Sep 2020 • Xiao Yang, Weiqing Liu, Dong Zhou, Jiang Bian, Tie-Yan Liu
Quantitative investment aims to maximize the return and minimize the risk in a sequential trading period over a set of financial instruments.
2 code implementations • 10 Jul 2020 • Xueqing Wu, Lewen Wang, Yingce Xia, Weiqing Liu, Lijun Wu, Shufang Xie, Tao Qin, Tie-Yan Liu
In many applications, a sequence learning task is usually associated with multiple temporally correlated auxiliary tasks, which are different in terms of how much input information to use or which future step to predict.
no code implementations • 9 Jul 2020 • Yang Fan, Yingce Xia, Lijun Wu, Shufang Xie, Weiqing Liu, Jiang Bian, Tao Qin, Xiang-Yang Li
Recently, the concept of teaching has been introduced into machine learning, in which a teacher model is used to guide the training of a student model (which will be used in real tasks) through data selection, loss function design, etc.
no code implementations • 16 Jun 2020 • Xia Hu, Weiqing Liu, Jiang Bian, Jian Pei
Our results demonstrate that the occurrence of overfitting is positively correlated with the increase of model complexity during training.
4 code implementations • 6 Dec 2017 • Ziniu Hu, Weiqing Liu, Jiang Bian, Xuanzhe Liu, Tie-Yan Liu
Stock trend prediction plays a critical role in seeking maximized profit from stock investment.