| 書目名稱 | The Mathematics of Blunt Body Sampling | | 編輯 | Sarah Jane Dunnett,Derek Binns Ingham | | 視頻video | http://file.papertrans.cn/914/913754/913754.mp4 | | 叢書名稱 | Lecture Notes in Engineering | | 圖書封面 |  | | 描述 | Particle samplers are widely used in workplaces in order to determine the concentration of airborne particles in the atmosphere. They generally operate by drawing air, with the aid of a pump, through one or more orifices in the sampler body and housed within the sampler is a filter through which the air is subsequently drawn. The airborne particles are collected on the filter and their concentration is determined. Various samplers have been designed for this purpose including "static" samplers, which are located in a fixed position in a working environment and determine the dust concentration averaged over a prescribed period of time at that one point, and "personal" samplers which are mounted on a working person near to the breathing zone. The ORB sampler, a static sampler designed by Ogden and Birkett (1978) to have approximately the same entry efficiency, for particles with aerodynamical diameter up to at least 25~m, as a human head equally exposed to all wind directions for wind speeds between 0 and 2. 75m1s, is shown in Fig. l. l and examples of personal samplers are shown in Fig. 1. 2a, b and c and represent a single 4mm hole sampler, a seven hole sampler and a 25mm open face | | 出版日期 | Book 1988 | | 關(guān)鍵詞 | calculus; environment; health; model; modeling; water quality and water pollution; air pollution and air q | | 版次 | 1 | | doi | https://doi.org/10.1007/978-3-642-83563-6 | | isbn_softcover | 978-3-540-50147-3 | | isbn_ebook | 978-3-642-83563-6Series ISSN 0176-5035 | | issn_series | 0176-5035 | | copyright | Springer-Verlag Berlin, Heidelberg 1988 |
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