Document classification is an area of great importance for which many classification methods have been developed. However, most of these methods cannot generate time-dependent classification rules. Thus, they are not the best choices for problems with time-varying structures. To address this...

The problem of regression shrinkage and selection for multivariate regression is considered. The goal is to consistently identify those variables relevant for regression. This is done not only for predictors but also for responses. To this end, a novel relationship between multivariate...

The naive Bayes approach is one of the most popular methods used for classification. Nevertheless, how to test its statistical significance under an ultra-high-dimensional (UHD) setup is not well understood. To fill this important theoretical gap, we propose a novel testing statistic with a...

Confronting the escalating challenges appertaining to global climate change, countries around the world have been rigorously developing strategies to achieve carbon neutrality. The electrification of transportation systems is a feasible way owing to its profound potential to address issues tied...

The video game industry is one of the new engines of economic growth, and esports industry, as an essential subindustry, plays a pivotal role in driving economic growth. To investigate the mechanism and the quantitative relationship among them, we propose a two-stage transmission path “Esports...

In this paper, we consider how to recover the structure of a Bayesian network from a moral graph. We present a more accurate characterization of moral edges, based on which a complete subset (i.e., a separator) contained in the neighbor set of one vertex of the putative moral edge in some prime...

In this note, we present three equivalent characterizations of a sufficient condition for χ2-asymptotics for the likelihood ratio tests in one-factor analysis offered by Drton (2009). A corollary of this result is that the condition is equivalent to the one-factor case of a condition provided...