This book mainly introduces some new design methods and ideas aboutfractional-order nonlinear systems, the main contents include: exponentialstability analysis and adaptive projective synchronization for fractional-order T-S fuzzy neural networks; projective synchronization for two identical andnonidentical time-delayed fractional-order T-S fuzzy neuralnetworks; mixed H_.,/passive projective synchronization for fractional-orderneural networks and fractional-order memristor-based neural networks; H tracking control and adaptive inter val type-2 fuzzy sliding mode control for fractional-order nonlinear systems.