From Prof. Malcolm Smith "I have always thought that the memristor is rather a weak concept. It is defined as a device with a nonlinear relationship between f

From Prof. Malcolm Smith "I have always thought that the memristor is rather a weak concept. It is defined as a device with a nonlinear relationship between flux and charge. A linear memristor is the same as a resistor, so in linear circuits the element is not meaningful. The definition does not pin down the type of nonlinearity. So the difference between a variable resistor and a memristor is not sharply defined. The mechanical equivalent of a variable resistor is of course a variable damper. Variable dampers and semi-active dampers are of course used a lot in suspension systems"