Figure 2

The relationship between R12 and N22–N21. Open scatters are raw data; the solid line is the fitting curve. The value of Adj. R2 for the fitting curve is larger than 0.52.

The relationship between R12 and N22–N21. Open scatters are raw data; the solid line is the fitting curve. The value of Adj. R2 for the fitting curve is larger than 0.52.