Search Results for author: Xiaoping Chen

Found 14 papers, 1 papers with code

Task planning and explanation with virtual actions

no code implementations10 Jan 2022 Guowei Cui, Xiaoping Chen

This paper shows how to introduce virtual action to extend action models to make the graph to be connected: i) explicitly defines static predicate (type, permanent properties, etc) or dynamic predicate (state); ii) constructs a full virtual action or a semi-virtual action for each state; iii) finds the cause of the planning failure through a progressive planning approach.

Adaptive Dialog Policy Learning with Hindsight and User Modeling

no code implementations SIGDIAL (ACL) 2020 Yan Cao, Keting Lu, Xiaoping Chen, Shiqi Zhang

Reinforcement learning methods have been used to compute dialog policies from language-based interaction experiences.

Reinforcement Learning (RL)

AutoEG: Automated Experience Grafting for Off-Policy Deep Reinforcement Learning

no code implementations22 Apr 2020 Keting Lu, Shiqi Zhang, Xiaoping Chen

First, we develop an algorithm, called Experience Grafting (EG), to enable RL agents to reorganize segments of the few high-quality trajectories from the experience pool to generate many synthetic trajectories while retaining the quality.

reinforcement-learning Reinforcement Learning (RL)

Attentive One-Dimensional Heatmap Regression for Facial Landmark Detection and Tracking

no code implementations5 Apr 2020 Shi Yin, Shangfei Wang, Xiaoping Chen, Enhong Chen

These 1D heatmaps reduce spatial complexity significantly compared to current heatmap regression methods, which use 2D heatmaps to represent the joint distributions of x and y coordinates.

Face Alignment Facial Landmark Detection +3

Robot Representation and Reasoning with Knowledge from Reinforcement Learning

no code implementations28 Sep 2018 Keting Lu, Shiqi Zhang, Peter Stone, Xiaoping Chen

In this work, we integrate logical-probabilistic KRR with model-based RL, enabling agents to simultaneously reason with declarative knowledge and learn from interaction experiences.

reinforcement-learning Reinforcement Learning (RL)

KDSL: a Knowledge-Driven Supervised Learning Framework for Word Sense Disambiguation

no code implementations28 Aug 2018 Shi Yin, Yi Zhou, Chenguang Li, Shangfei Wang, Jianmin Ji, Xiaoping Chen, Ruili Wang

We propose KDSL, a new word sense disambiguation (WSD) framework that utilizes knowledge to automatically generate sense-labeled data for supervised learning.

Word Sense Disambiguation

Precise Box Score: Extract More Information from Datasets to Improve the Performance of Face Detection

no code implementations28 Apr 2018 Ce Qi, Xiaoping Chen, Pingyu Wang, Fei Su

The proposed training strategy uses the anchors with IoUs between the first and second threshold, which can consistently improve the performance of face detection.

Face Detection Model Compression +2

Signature of Geometric Centroids for 3D Local Shape Description and Partial Shape Matching

no code implementations26 Dec 2016 Keke Tang, Peng Song, Xiaoping Chen

Depth scans acquired from different views may contain nuisances such as noise, occlusion, and varying point density.

3D Object Recognition Denoising

Understanding User Instructions by Utilizing Open Knowledge for Service Robots

no code implementations9 Jun 2016 Dongcai Lu, Feng Wu, Xiaoping Chen

Understanding user instructions in natural language is an active research topic in AI and robotics.

Bayesian Mixture Modelling and Inference based Thompson Sampling in Monte-Carlo Tree Search

no code implementations NeurIPS 2013 Aijun Bai, Feng Wu, Xiaoping Chen

Monte-Carlo tree search is drawing great interest in the domain of planning under uncertainty, particularly when little or no domain knowledge is available.

Thompson Sampling

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