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Air Quality Status of Respirable Particulate Levels at Selected Traffic Junctions along the Section of Lateral Highway in Hyderabad

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Journal of Environmental Protection 2011年第5期2卷 662-667页

作者： manda karunakar reddy Mareddy Sumathi Scientist NEERI Zonal Laboratory Hyderabad

The aerodynamic diameter of an air borne particle is the key property in determining its respiratory deposition. The study aim to assess PM2.5 level and its size distribution at 5 traffic junctions located along the lateral highway connected to NH-202. A cascade impactor has been used to measure the size function range of PM2.5 apart from PM10 of atmospheric dust particles in air being PM2.5 is concern with respect to effect on human health and is able to tend deeply into the respiratory tract reaching the lungs. It is observed that weight % of PM2.5 values are in the range of 40% - 60% of PM10 and few values of PM2.5 are exceeding the standards prescribed by CPCB. It is concluded that free flow of traffic is main concern and maintenance of road should be carried out during low traffic hours.

关键词： PM2.5 Air Borne Particle Traffic Respirable Dust Particle Size

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Ear Field Adaptive Noise Control for Snoring:An Real-time Experimental Approach

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 158-166页

作者： Lichuan Liu karunakar reddy Pottim Sen M.Kuo IEEE the Electrical Engineering Department Northern Illinois University the Department of Electrical Engineering Chung Yuan Christian University

In this paper, an active noise control(ANC) system is developed to provide an effective and non-intrusive solution for reducing loud snoring to provide a quiet environment for a snorer's bed partner. An adaptive least mean square(LMS)algorithm optimized for different kinds of snore signals is introduced and theoretically analyzed. Also, a residual noise masking approach is proposed to further reduce the effect of the snore noise without interfering with the LMS algorithm. Computer simulations followed by real-time experiments are conducted to demonstrate the feasibility of the snore ANC systems based on a pillow setup. For the optimum effect based on the characteristics of human hearing, the performance of the proposed approach is evaluated by using the multi-channel feedforward ANC systems based on the filtered-X least mean square(FXLMS) *** with a traditional headboard setup for snoring noise control, the proposed snore ANC systems optimized for ear field operation yield much higher noise reduction around the ears of the snorer's bed partner.

关键词： Active noise control (ANC) audio integrated ANC ear field filtered-X least mean square (FXLMS) snore multi-channel

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