Table 1 The best performing fit equations with acceptable χ2 values.

From: Retrospective determination of exposure temperature of standing trees during wildfires with solid-state NMR

Equation #

Description

Equation

χ2

1

Pine HW (LT)

\(y = A + Bx + Cx^{2}\)

0.16

2

Pine HW (HT)

\(y = A + Bx\)

0.64

3

Eucalyptus HW (WT)

\(y = A + Bx + Cx^{2} + Dx^{3}\)

0.45

4

Eucalyptus HW (HT)

\(y = A + Bx\)

0.2

5

Eucalyptus PA (WT)

\(y = A + Bx + Cx^{2}\)

0.88

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