		Linguistic Representation and Membership Function
Variables	Range of Values	Very Low Gain	Low Gain	High Gain	Very High Gain
Positive	Very Low Gain ( $V L G_{r}$ ) $1 < V L G_{r} \leq 5.5$ Low Gain ( $L G_{r}$ ) $2.1 < L G_{r} \leq 7.9$ High Gain ( $H G_{r}$ ) $4.6 < H G_{r} \leq 10$ Very High Gain( $V H G_{r}$ ) $7.0 < V H G_{r} \leq 10$	$μ_{(V L G_{r})} = {\begin{cases} 0, V L G_{r} < 1 \\ < 1, 1 \leq V L G_{r} < 2.5 \\ 1, V L G_{r} = 2.5 \\ < 1, 2.5 < V L G_{r} \leq 5.5 \end{cases}$	$μ_{(L G_{r})} = {\begin{cases} 0, L G_{r} < 2.1 \\ < 1, 2.1 < L G_{r} < 5.0 \\ 1, L G_{r} = 5.0 \\ < 1, 5.0 < L G_{r} \leq 7.9 \end{cases}$	$μ_{(H G_{r})} = {\begin{cases} 0, H G_{r} < 4.6 \\ < 1, 4.6 < H G_{r} < 7.5 \\ 1, H G_{r} = 7.5 \\ < 1, 7.5 < H G_{r} \leq 10 \end{cases}$	$μ_{(V H G_{r})} = {\begin{cases} 0, V H G_{r} < 7.0 \\ < 1, 7.0 < V H G_{r} \\ < 10 \\ 1, V H G_{r} = 10 \end{cases}$
Negative	Very Low Loss ( $V L L_{l}$ ) $1 < V L L_{l} \leq 5.5$ Low Loss ( $L L_{l}$ ) $2.1 < L L_{l} \leq 7.9$ High Loss ( $H L_{l}$ ) $4.6 < H L_{l} \leq 10$ Very High Loss ( $V H L_{l}$ ) $7.0 < V H L_{l} \leq 10$	Very Low Loss	Low Loss	High Loss	Very High Loss
Negative		$μ_{(V L L_{l})} = {\begin{cases} 0, V L L_{l} < 1 \\ < 1, 1 \leq V L L_{l} < 2.5 \\ 1, V L L_{l} = 2.5 \\ < 1, 2.5 < V L L_{l} \leq 5.5 \end{cases}$	$μ_{(L L_{l})} = {\begin{cases} 0, L L_{l} < 2.1 \\ < 1, 2.1 < L L_{l} < 5.0 \\ 1, L L_{l} = 5.0 \\ < 1, 5.0 < L L_{l} \leq 7.9 \end{cases}$	$μ_{(H L_{l})} = {\begin{cases} 0, H L_{l} < 4.6 \\ < 1, 4.6 < H L_{l} < 7.5 \\ 1, H L_{l} = 7.5 \\ < 1, 7.5 < H L_{l} \leq 10 \end{cases}$	$μ_{(V H L_{l})} = {\begin{cases} 0, V H L_{l} < 7.0 \\ < 1, 7.0 < V H L_{l} \\ < 10 \\ 1, V H L_{l} = 10 \end{cases}$