The spatial distribution of snow cover on the central Arctic sea ice is investigated here based on the observations made during the Third Chinese Arctic Expedition. Six types of snow were observed dur
Vegetation and soil surveys were conducted under different site conditions in 2007-2011 to study species diversity using richness, evenness and diversity indices, in the middle portion of the Heihe Ri
In a satellite laser ranging telescope system,well-aligned encoders of the elevation and azimuth axes are essential for tracking objects.However,it is very difficult and time-consuming to correct the