Search Results for author: Wenxin Li

Found 10 papers, 2 papers with code

A Note on Optimizing the Ratio of Monotone Supermodular Functions

no code implementations16 Dec 2020 Wenxin Li

We show that for the problem of minimizing (or maximizing) the ratio of two supermodular functions, no bounded approximation ratio can be achieved via polynomial number of queries, if the two supermodular functions are both monotone non-decreasing or non-increasing.

Optimal Algorithm and Lower Bound for Submodular Maximization

no code implementations16 Jun 2020 Wenxin Li

In this work, we present the first linear query complexity algorithm for maximizing a monotone submodular function subject to a cardinality constraint, which achieves the approximation ratio of $(1-1/e-\varepsilon)$ using $O(n/\varepsilon)$ queries.

Viral Pneumonia Screening on Chest X-ray Images Using Confidence-Aware Anomaly Detection

1 code implementation27 Mar 2020 Jianpeng Zhang, Yutong Xie, Guansong Pang, Zhibin Liao, Johan Verjans, Wenxin Li, Zongji Sun, Jian He, Yi Li, Chunhua Shen, Yong Xia

In this paper, we formulate the task of differentiating viral pneumonia from non-viral pneumonia and healthy controls into an one-class classification-based anomaly detection problem, and thus propose the confidence-aware anomaly detection (CAAD) model, which consists of a shared feature extractor, an anomaly detection module, and a confidence prediction module.

Anomaly Detection Classification +1

Layout Design for Intelligent Warehouse by Evolution with Fitness Approximation

no code implementations14 Nov 2018 Haifeng Zhang, Zilong Guo, Han Cai, Chris Wang, Wei-Nan Zhang, Yong Yu, Wenxin Li, Jun Wang

With the rapid growth of the express industry, intelligent warehouses that employ autonomous robots for carrying parcels have been widely used to handle the vast express volume.

N2RPP: An Adversarial Network to Rebuild Plantar Pressure for ACLD Patients

no code implementations8 May 2018 Yi Zhang, Zhengfei Wang, Guoxiong Xu, Hongshi Huang, Wenxin Li

Plantar pressure is one of which contains this information and it describes human walking features.

A Model for Medical Diagnosis Based on Plantar Pressure

no code implementations28 Feb 2018 Guoxiong Xu, Zhengfei Wang, Hongshi Huang, Wenxin Li, Can Liu, Shilei Liu

Here, we propose a model using convolutional neural network based on plantar pressure for medical diagnosis.

Medical Diagnosis

Learning to Design Games: Strategic Environments in Reinforcement Learning

no code implementations5 Jul 2017 Haifeng Zhang, Jun Wang, Zhiming Zhou, Wei-Nan Zhang, Ying Wen, Yong Yu, Wenxin Li

In typical reinforcement learning (RL), the environment is assumed given and the goal of the learning is to identify an optimal policy for the agent taking actions through its interactions with the environment.

A Fusion Method Based on Decision Reliability Ratio for Finger Vein Verification

no code implementations17 Dec 2016 Liao Ni, Yi Zhang, He Zheng, Shilei Liu, Houjun Huang, Wenxin Li

Our work is first to define decision reliability ratio to quantify this confidence, and then propose the Maximum Decision Reliability Ratio (MDRR) fusion method incorporating Weighted Voting.

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