The Chinese government has set ambitious targets to reduce the intensity of carbon emissions per unit of GDP by 40%45%during 2005 to 2020 and achieve the peakin
Calibration of magnetometer is an essential part to obtain high measurement precision.However,the existing calibration methods are basically the calibration of
With the development of mining industry,people have obtained profits from it,but they are facing environmental damages.In order to monitor these environmental c