, where α(θ;τ)=Pθ{τ<θ} is 'the false alarm probability' and Δ(θ;τ)=Eθ(τ−θ)+ is 'the average detection delay', and explain why …

, where α(θ;τ)=Pθ{τ<θ} is \textit{the false alarm probability} and Δ(θ;τ)=Eθ(τ−θ)+ is \textit{the average detection delay …