Search Results for author: Zhijun Chen

Found 10 papers, 4 papers with code

Neural-Hidden-CRF: A Robust Weakly-Supervised Sequence Labeler

1 code implementation10 Sep 2023 Zhijun Chen, Hailong Sun, Wanhao Zhang, Chunyi Xu, Qianren Mao, Pengpeng Chen

In Neural-Hidden-CRF, we can capitalize on the powerful language model BERT or other deep models to provide rich contextual semantic knowledge to the latent ground truth sequence, and use the hidden CRF layer to capture the internal label dependencies.

Language Modelling

Learning from Noisy Crowd Labels with Logics

1 code implementation13 Feb 2023 Zhijun Chen, Hailong Sun, Haoqian He, Pengpeng Chen

This paper explores the integration of symbolic logic knowledge into deep neural networks for learning from noisy crowd labels.

Knowledge Distillation named-entity-recognition +4

UFNRec: Utilizing False Negative Samples for Sequential Recommendation

1 code implementation8 Aug 2022 Xiaoyang Liu, Chong Liu, Pinzheng Wang, Rongqin Zheng, Lixin Zhang, Leyu Lin, Zhijun Chen, Liangliang Fu

To this end, we propose a novel method that can Utilize False Negative samples for sequential Recommendation (UFNRec) to improve model performance.

Sequential Recommendation

A spatial-temporal short-term traffic flow prediction model based on dynamical-learning graph convolution mechanism

no code implementations10 May 2022 Zhijun Chen, Zhe Lu, Qiushi Chen, Hongliang Zhong, Yishi Zhang, Jie Xue, Chaozhong Wu

Location-GCN solves this problem by adding a new learnable matrix into the GCN mechanism, using the absolute value of this matrix to represent the distinct influence levels among different nodes.

Management Traffic Prediction

Concentration of Random Feature Matrices in High-Dimensions

no code implementations14 Apr 2022 Zhijun Chen, Hayden Schaeffer, Rachel Ward

The spectra of random feature matrices provide essential information on the conditioning of the linear system used in random feature regression problems and are thus connected to the consistency and generalization of random feature models.

Vocal Bursts Intensity Prediction

Conditioning of Random Feature Matrices: Double Descent and Generalization Error

no code implementations21 Oct 2021 Zhijun Chen, Hayden Schaeffer

In particular, we show that if the complexity ratio $\frac{N}{m}$ where $N$ is the number of neurons and $m$ is the number of data samples scales like $\log^{-1}(N)$ or $\log(m)$, then the random feature matrix is well-conditioned.

regression

Learning from Multiple Annotators by Incorporating Instance Features

no code implementations29 Jun 2021 Jingzheng Li, Hailong Sun, Jiyi Li, Zhijun Chen, Renshuai Tao, Yufei Ge

Learning from multiple annotators aims to induce a high-quality classifier from training instances, where each of them is associated with a set of possibly noisy labels provided by multiple annotators under the influence of their varying abilities and own biases.

Bootstrapping Face Detection with Hard Negative Examples

no code implementations7 Aug 2016 Shaohua Wan, Zhijun Chen, Tao Zhang, Bo Zhang, Kong-kat Wong

Recently significant performance improvement in face detection was made possible by deeply trained convolutional networks.

Face Detection

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