In this paper we introlduce a robust and nonlinear filtering framework: Weighted Myriad Filtering. Much like the Gaussian assumption has motivated the development of linear filtering theory, the formulation of myriad filters is motivated by the statistical properties of a-stable processes. Weighted Myriad Fi1ter.s have a solid theoretical basis, are inherently more powerful than weighted median...

Sweden Front cover: Electrone microscope image of a diesel exhaust particle agglomerate.Till Cicci, Erica och Arvid " Every animal is naturally made for the use of pure, natural and free air " Tests of the effects of air on the human body, John Arbuthnot.ABSTRACT Exhaust emissions from mobile sources is one of the major sources to air pollution. Thus, it is important to identify and quantify ch...

Over the past decades, industrial sector has been trying to improve use of resources and environmental impact they create. Significant work done in compressed air systems. However, there is still much room for improvement. The focus this study on a new approach energy efficient filtration. This involves installation different filter configurations that enable lower pressure drop, instead conven...

In order to cope with the increasingly stringent environmental pollution control target, DI gasoline engines must use particulate filters. ensure that GPF will not block or burn during process of capturing particulate, filter (GPF) needs be controlled based on current soot mass in real time. The loading capacity controls regeneration GPF, and influencing factors efficiency are highly related in...

Abstract With the rapid development of society, severe haze weather caused by particulate matters (PMs) occurs frequently. Electret air filters have been playing an important role in purifying and alleviating pollution. In this work, electret were fabricated based on polypropylene (PP) materials to investigate their filtering performance PMs. First, PP-based films was mainly focused on. The cha...

In mobile communications systems complexity and efficiency are issues of paramount importance. Therefore when implementing integer factor sample-rate conversion, comb-filters especially cascaded-integratorcomb (CIC) filters are a good choice of realizing linearphase filters with low complexity. However, neither the direct implementation of comb-filters as transversal filters nor their implement...

The aim of this study was to develop and optimize methods for the determination gaseous particulate (PM2.5) secondary amines (SAs) in atmosphere using gas chromatography coupled with electron capture detection (GC-ECD) following chemical derivatization. employed liquid–liquid extraction (LLE) pentafluorobenzenesulfonyl derivatives SAs before analytical samples were injected into GC-ECD. optimiz...

BACKGROUND AND PURPOSE Histopathologic analysis was performed to better understand quantity, particle size, and composition of embolized debris collected in protection filters during carotid artery stent implantation. METHODS Elective carotid stent implantation with the use of a distal filter protection was attempted in 38 consecutive lesions (36 patients) of the internal carotid artery prese...