【摘要】 本研究首先对空气负离子NAI(Negative Air Ion)的概念、功能作用、形成及其形成相关机理,以及NAI的测定方法和分级评价方法进行概述。然后通过对前人的相关研究进行归纳,总结得出NAI的日变化、季节变化和区域变化特征以及影响NAI浓度的因素,归纳总结这些研究结论的规律性。最后通过分析目前许多学者的研究,发现NAI的相关研究中还需要进一步解决的一些问题。更多还原

【Abstract】 The study reviews the concept, function, formation and formation mechanism of NAI(Negative Air Ion), as well as the measurement method and grading evaluation method of NAI. Then, the diurnal variation,seasonal variation and regional variation characteristics of NAI and the factors influencing NAI concentration were summarized by studying the related research of predecessors, and the regularities of these conclusions were summed up. Finally, by analyzing the current research of many scholars, it is found that some problems need to be solved further in the related research of NAI.更多还原