The integrated solutions of (29)–(31) satisfy q0(T0 = 0) = q0,
B0(t0 = 0) = B0, and A0(r0 = 0) = A0 at the boundary and initial conditions
of T0 = 0,t0 = 0, and r0 = 0, which stand for thermal, temporal,
and spatial equilibriums. Furthermore, they satisfy q0(T0 = Ta) = q1,
B0(t0 = ta) = B1, and A0(r0 = ra) = A1 at the limiting conditions of
T0 = Ta, t0 = ta, and r0 = ra. A variable with the subscript a denotes
the threshold value, and an amplitude variable with the superscript
1 indicates its limiting value. Using the initial and limiting
conditions, we can obtain the following relations: