Based on two period GaoFen-1 (GF-1) images, the dimidiate pixel model and vegetation coverage estimation model were applied to detect the changes of vegetation covers from 2013 to 2015 in Dunhuang oasis.
Based on two period GaoFen-1 images, combined with field survey data, the dimidiate pixel model and fractional vegetation coverage estimation model were applied to detect the changes of local vegetation coverage from July 2013 to July 2015.
Based on three periods of deforestation data points from satellite images (1973, 1985 and 2006) and subsequent interpolation, the forest and woodland cover declined from 44% in 1973 to less than 15% in 2009 (Fig. 4).
In order to correct for drifting changes in [Hb] over time, each channel was based on two baseline periods: the mean of the 10-second periods before/after the task section.
Data collected during the experiment were analyzed based on two different periods: during the increase of lay (from weeks 20 to 26) and after the peak (from weeks 27 to 39).
The ML N e estimates (jointly with m) for the Bexar and Oklahoma samples based on two sampling periods (1910 2005) were approximately 38 (95% CI, 17 208) and 31 (95% CI, 15 180), respectively (Table 5).
To evaluate the consistency of the seasonal pattern across the entire study period, we split the data into two halves based on two sub-periods (i.e. 1997 to 2001 and 2003 to 2006) and seasonality parameters were re-estimated separately for each of sub-periods as was done for whole data set.
However, results on mean differences for 10-year survival computed on 10-year periods and 20-year survival computed on 5-year periods were based on three calendar periods only.
Three possible definitions for the term "new prescription" were compared, based on three different periods of time, viz.
