Qunqiang Feng

collaborators

3 papers

stat.CO2026

Efficient Variance Estimation for the Polytomous Discrimination Index

Qunqiang Feng, Taozheng Jia, Pan Liu +2

Evaluating diagnostic accuracy for multi-category outcomes remains a significant challenge, primarily due to computational limitations in existing performance metrics. The Polytomo…

math.PR2026

Asymptotic normality for triangle counting in the sparse $β$ -model

Siang Zhang, Qunqiang Feng, Zhishui Hu

We study the number of triangles $T_{n}$ in the sparse $β$ -model on $n$ vertices, a random graph model that captures degree heterogeneity in real-world networks. Using the norms of t…

math.PR2023

Average Jaccard Index of Random Graphs

Qunqiang Feng, Shuai Guo, Zhishui Hu

The asymptotic behavior of the Jaccard index in $G (n, p)$ , the classical Erdös-Rényi random graphs model, is studied in this paper, as $n$ goes to infinity. We first derive the asym…

Efficient Variance Estimation for the Polytomous Discrimination Index

Asymptotic normality for triangle counting in the sparse β-model

Average Jaccard Index of Random Graphs

Asymptotic normality for triangle counting in the sparse $β$ -model