Equation Icon  F 22 { 2 } S (Ω) = |K − M Ω |S 𝒳𝒳 + 2 Re [K − M Ω ]S𝒳 ℱ + Sℱ ℱ = |Ke ff − M Ω2|2S𝒳 𝒳 + Seℱffℱ, (477 )