... observed state and estimated parameter of xi and θi , respectively, and ki and Li are positive constants Proof From system 2.3 , we have yi ˙ Let ei yi − xi , θi ˙ γi t θi ˙ ei t − θi γi t , and note ... estimator Parameter Identification in the Presence of Noise Noise plays an important role in synchronization and parameters identification of dynamical systems Noise usually deteriorates the performance ... E, vol 76, Article ID 027203, pages, 2007 L Li, Y Yang, and H Peng, “Comment on Adaptive Q-S lag, anticipated, and complete time-varying synchronization and parameters identification of uncertain...