Emotion model of associative memory possessing variable learning rates with time delay

Lots of researchers have used memristors to realize the emotion model of associative memory. In previous works, researchers analyzed this associative memory from two perspectives—forgetting and variable learning rate. In the previous emotion model, neutral stimulus(message notification) and unconditioned reflex(good or bad message) were applied simultaneously. But the variable learning rate with time delay is not considered in the emotion model. When the unconditioned reflex lags behind the neutral stimulus, the associative memory can also be formed. This article proposes an emotion model of variable learning rate with time delay. We also consider three kinds of forgetting: only a stimulus of unconditioned reflex applied, only a neutral stimulus applied and neither stimulus of unconditioned reflex nor neutral stimulus applied. In the end, the software PSPICE is used to simulate the whole circuit. This paper provides an option to realize emotional learning based on memristor.