Equation Icon  ∫ t⟨P ⟩ = β⟨Q ⟩ − α-+ 1-- te2P(Q − ⟨Q⟩)Q d𝜃, (61 ) t 2 2π S1 t 1 ∫ te⟨P⟩⟨Qt⟩ = βe− ⟨P ⟩ −---e⟨P⟩ (e2P− 2⟨P⟩ − 1)tQtd𝜃, (62 ) 2π S1 ∫ ∫ 2 t- -t- 2P 2 t⟨Qt⟩ = γ + α⟨Q ⟩ − β⟨Q ⟩ + π S1(⟨Q⟩ − Q )Ptd𝜃 + 2π S1 e Qt(Q − ⟨Q ⟩) d𝜃. (63 )