9.
曲线\(C_{1}\)的参数方程为\(\begin{cases}x= \sqrt{2}\cos α \\ y=1+ \sqrt{2}\sin α\end{cases} (α \)为参数\()\),以原点为极点,\(x\)轴的非负半轴为极轴建立极坐标系,曲线\(C_{2}\)的极坐标方程为\(\sqrt{2}p\sin (θ+ \dfrac{π}{4})=5 .\)设点\(P\),\(Q\)分别在曲线\(C\)\(1\)和\(C\)\(2\)上运动,则\(\left|PQ\right| \)的最小值为