Figure 5From: Passivity analysis and state estimation for a class of memristor-based neural networks with multiple proportional delays The contrast curves of system ( 4.1 ) and ( 4.5 ) and their error states without control input and the initial value \(\pmb{x_{1}=2}\) , \(\pmb{x_{2}=3}\) , \(\pmb{\overline {x}_{1}=-1}\) , \(\pmb{\overline{x}_{2}=-3}\) . Back to article page