On the other hand, the influence on air quality is relevant only in the immediate vicinity of the emission source. 另一方面，對空氣質量的影響只限於排放源經過的鄰近地區。
This chapter describes methods of estimating airborne pollutant concentration distributions associated with various emission sources. 本章論述幾種有關各種排放源的大氣污染物濃度分佈的估算方法。
Furthermore, a field emission triode device using the self-organized nanodot arrays as electron emission source was proposed and fabricated. 本研究亦利用奈米點作為電子發射源製作場效發射三極體元件。
The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band. 聲發射源與接收訊號感測器間的距離以及環境雜訊的電平是選擇頻帶的主要依據。
