Search Results for author: Zizhen Wang

Found 5 papers, 2 papers with code

A Re-Balancing Strategy for Class-Imbalanced Classification Based on Instance Difficulty

no code implementations CVPR 2022 Sihao Yu, Jiafeng Guo, Ruqing Zhang, Yixing Fan, Zizhen Wang, Xueqi Cheng

By reducing the weights of the majority classes, such instances would become more difficult to learn and hurt the overall performance consequently.

imbalanced classification

Match$^2$: A Matching over Matching Model for Similar Question Identification

no code implementations21 Jun 2020 Zizhen Wang, Yixing Fan, Jiafeng Guo, Liu Yang, Ruqing Zhang, Yanyan Lan, Xue-Qi Cheng, Hui Jiang, Xiaozhao Wang

However, it has long been a challenge to properly measure the similarity between two questions due to the inherent variation of natural language, i. e., there could be different ways to ask a same question or different questions sharing similar expressions.

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