Abstract: In recent years, the algebraic structures of rough set theory has been rapidly developed. This paper concerns a relationship between rough sets and projective module. We shall introduce the notion of rough projective module, which is an extended notion of projective module.

• Publication Date: 21-Dec-2014
• DOI: 10.15224/978-1-63248-033-0-09
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Abstract: Epidemiologic studies have linked human exposure to pollutants with adverse health effects. Passenger exposure in public transport systems contributes an important fraction of daily burden of air pollutants. While there is extensive literature reporting the concentrations of pollutants in public transport systems in different cities, there are few studies systematically addressing the heterogeneity of passenger exposure in different transit microenvironments, in cabins of different transit vehicles and in areas with different characteristics. The present study investigated PM2.5 (particulate matter with aerodynamic diameters smaller than 2.5μm), black carbon (BC), ultrafine particles (UFP) and carbon monoxide (CO) pollutant concentrations in various public road transport systems in highly urbanized city of Hong Kong. Using a trolley case housing numerous portable air monitors, we conducted a total of 119 trips during the campaign. Transit microenvironments, classified as 1). busy and s

• Publication Date: 21-Dec-2014
• DOI: 10.15224/978-1-63248-033-0-10
• Views: 0
• Downloads: 0