Search Results for author: Ji He

Found 9 papers, 3 papers with code

Radon Inversion via Deep Learning

no code implementations9 Aug 2018 Ji He, Jianhua Ma

Qualitative results show promising reconstruction performance of the iRadonMap.

Image Reconstruction

Q-LDA: Uncovering Latent Patterns in Text-based Sequential Decision Processes

no code implementations NeurIPS 2017 Jianshu Chen, Chong Wang, Lin Xiao, Ji He, Lihong Li, Li Deng

In sequential decision making, it is often important and useful for end users to understand the underlying patterns or causes that lead to the corresponding decisions.

Decision Making Q-Learning +2

Reinforcement Learning with External Knowledge and Two-Stage Q-functions for Predicting Popular Reddit Threads

no code implementations20 Apr 2017 Ji He, Mari Ostendorf, Xiaodong He

This paper addresses the problem of predicting popularity of comments in an online discussion forum using reinforcement learning, particularly addressing two challenges that arise from having natural language state and action spaces.

Q-Learning reinforcement-learning +1

Deep Reinforcement Learning with a Combinatorial Action Space for Predicting Popular Reddit Threads

1 code implementation EMNLP 2016 Ji He, Mari Ostendorf, Xiaodong He, Jianshu Chen, Jianfeng Gao, Lihong Li, Li Deng

We introduce an online popularity prediction and tracking task as a benchmark task for reinforcement learning with a combinatorial, natural language action space.

reinforcement-learning Reinforcement Learning (RL)

Deep Reinforcement Learning with a Natural Language Action Space

3 code implementations ACL 2016 Ji He, Jianshu Chen, Xiaodong He, Jianfeng Gao, Lihong Li, Li Deng, Mari Ostendorf

This paper introduces a novel architecture for reinforcement learning with deep neural networks designed to handle state and action spaces characterized by natural language, as found in text-based games.

Q-Learning reinforcement-learning +2

Recurrent Reinforcement Learning: A Hybrid Approach

no code implementations10 Sep 2015 Xiujun Li, Lihong Li, Jianfeng Gao, Xiaodong He, Jianshu Chen, Li Deng, Ji He

Successful applications of reinforcement learning in real-world problems often require dealing with partially observable states.

reinforcement-learning Reinforcement Learning (RL)

End-to-end Learning of LDA by Mirror-Descent Back Propagation over a Deep Architecture

1 code implementation NeurIPS 2015 Jianshu Chen, Ji He, Yelong Shen, Lin Xiao, Xiaodong He, Jianfeng Gao, Xinying Song, Li Deng

We develop a fully discriminative learning approach for supervised Latent Dirichlet Allocation (LDA) model using Back Propagation (i. e., BP-sLDA), which maximizes the posterior probability of the prediction variable given the input document.

General Classification Topic Models

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