With the computer simulations, it has been found that in Differential Thermal Analysis (DTA) the overlapped peaks do not satisfy
the linear overlapping principle, and the relationship between the overlapped peaks is rather complex that is a function of
sample thermal conductivity, specific heat, quantity and latent heats, etc. If the first point where the two peaks begin to
overlap is at the posterior half of the first peak curve and the two overlapped peaks can be identified by two different peaks,
from the curve of overlapped peaks we can know that the temperature corresponding to the first point deviating from the sample's
first phase change curve is the sample's second phase change temperature.