An adaptive unscented Kalman filter (AUKF) and an augmented state method are employed to estimate the timevarying parameters and states of a kind of nonlinear high-speed objects. A strong tracking filter is employed to improve the tracking ability and robustness of unscented Kalman filter (UKF) when the process noise is inaccuracy, and wavelet transform is used to improve the estimate accuracy by the variance of measurement noise. An augmented square-root framework is utilized to improve the numerical stability and accuracy of UKF. Monte Carlo simulations and applications in the rapid trajectory estimation of hypersonic artillery shells confirm the effectiveness of the proposed method.
Since computer system functions are becoming increasingly complex,the user has to spend much more time on the process of seeking information,instead of utilizing the required information.Information intelligent push technology could replace the traditional method to speed up the information retrieval process.The fuzzy cognitive map has strong knowledge representation ability and reasoning capability.Information intelligent push with the basis on fuzzy cognitive map could abstract the computer user's operations to a fuzzy cognitive map,and infer the user's operating intentions.The reasoning results will be translated into operational events,and drive the computer system to push appropriate information to the user.
