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A new memristor-based hyperchaotic system is described in this paper. After studying on its basic dynamic characteristics, it is found that the hidden attractors can be obtained by adding a nonzero parameter (which named optimized factor in this paper) to the system. Moreover, when the optimized factor is varying, the corresponding hidden attractors of the system is symmetrical and can convert between double scrolls and a single scroll. Further, the optimized memristor-based hyperchaotic system is implemented by analog circuits. Corresponding experimental results are completely consistent with the theoretical analysis.