Technical limitations in image capturing usually impose defective, such as contrast degradation. There are different approaches to improve the contrast of an image. Among the exiting approaches, un-sharp masking is a popular method due to its simplicity in implementation and computation. There is an important parameter in un-sharp masking, named gain factor, which affects the quality of the enh...

Empirically, the formation of political attitudes has been strongly linked to the concept of group identification. Classifications such as race, gender, religion and ethnicity have been shown to be sharp predictors of many aspects of political life including who turns out to vote, how people vote, and the issues that are important to people. Furthermore, many topics that are of interest to poli...

In this paper we obtain sharp bounds for the Green function and jumping function of a subordinate killed Brownian motion in a bounded C domain, where the subordinating process is a subordinator whose Laplace exponent has certain asymptotic behavior at infinity.

In this paper, we establish some general forms of sharp Sobolev inequalities on the upper half space or any compact Riemannian manifold with smooth boundary. These forms extend some previous results due to Escobar [11], Li and Zhu [18].