2 papers
math.ST2025
Maximum likelihood estimation in the sparse Rasch model
Pai Peng, Lianqiang Qu, Qiuping Wang +2
The Rasch model has been widely used to analyse item response data in psychometrics and educational assessments. When the number of individuals and items are large, it may be impra…
math.CA2024
Assouad and lower dimensions of graph-directed Bedford-McMullen carpets
Hua Qiu, Qi Wang, Shufang Wang
We calculate the Assouad and lower dimensions of graph-directed Bedford-McMullen carpets, which reflect the extreme local scaling laws of the sets, in contrasting with known result…