FILTERING MATERIALS.

Nonlinear Image Filtering for Materials Classification

Size-Resolved Penetration of Filtering Materials from CE-Marked Filtering Facepiece Respirators

Throughout the years, the performance of the FFRs has been the topic of extensive studies, resulting mainly in the characterization of aerosol penetration through filters using aerosols that are thought to be similar to those encountered in workplaces. There are limited number of studies in the literature reporting CE-marked respirator performance, and there is a need to perform a penetration e...

Circular Mean Filtering For Textures Noise Reduction

In this paper, a special preprocessing operations (filter) is proposed to decrease the effects of noise of textures. This filter using average of circular neighbor points (Cmean) to reduce noise effect. Comparing this filter with other average filters such as square mean filter and square median filter indicates that it provides more noise reduction and increases the classification accuracy...

Electron energy filtering by a nonplanar potential to enhance the thermoelectric power factor in bulk materials

Polarization–universal rejection filtering by ambichiral structures made of indefinite dielectric–magnetic materials

Abstract. An ambichiral structure comprising sheets of an anisotropic dielectric material rejects normally incident plane waves of one circular polarization (CP) state but not of the other CP state, in its fundamental Bragg regime. However, if the same structure is made of an dielectric–magnetic material with indefinite permittivity and permeability dyadics, it may function as a polarization–un...