这个是基于单片机的,万年历的设计.可以计算出闰年.还可以整点报时,响6秒,自动停止.并且可以手动调整时间-This is based on single-chip, calendar design. Leap year can be calculated. Can also be the whole point timekeeping, sounding six seconds, automatically stop. And can manually adjust the time

利用六种（SO2、NO2、CO、O3、PM10、PM2.5）污染物浓度数据计算空气质量AQI值(Calculating air quality AQI value by using six kinds of pollutants concentration data of SO2, NO2, CO, O3, PM10 and PM2.5)