Through monitoring at Wuying National Forest Park in Yichun, the authors find that the result of Lenard effect is the most notable in all generable mechanisms of NAI. 通过对伊春五营国家森林公园负离子浓度的监测发现,在空气负离子产生的各项机理中,勒纳尔效应的效果是最显著的。
Visual FoxPro provides not only the data bank receiver with a data management function but supports the object-oriented programming method, generable in event-driven application program of quite a strong interactive ability. VISUALFOXPRO不仅为应用程序开发者提供了具有集中的数据管理功能的数据库容器,而且支持面向对象的编程方法,并可生成真正事件驱动的应用程序,具有很强的交互能力。