Figure 8.24: Data Containing Nonconvex Clusters: PROC CLUSTER with METHOD=TWOSTAGE Ward's method and average linkage, not shown, do better than PROC FASTCLUS but not as well as the centroid method.

Most high-dimensional estimation methods propose to minimize a cost function (empirical risk) that is a sum of losses associated to each data point (each example). In this paper, we focus on the case ...

In 2018, Cong and Zhao introduced noncash risk measures with 1-norm for weak cone-type acceptable sets. In the present paper, we take a further look at nonconvex, noncash risk measures with p -norm (1 ...

News Release 6-Mar-2025 Nonconvex and discriminative transfer subspace learning Peer-Reviewed Publication Higher Education Press image: A framework of NDTSL method. view more Credit: Yueying LIU ...

This study provides new evidence on the effects of nonconvex employment adjustment costs at the aggregate level. Using the Preisach model of hysteresis, we find that hysteresis commonly found at the ...