A novel weighted l2,1 minimisation algorithm for a high range resolution profile with stepped frequency radar is proposed. The raw stepped frequency pulse train is converted into jointly sparse multiple measurement vectors by using the sliding window technique. Then, by using the Capon cepstrum a support-related weighting matrix is designed to control the priority class of bases in the reconstr...

This paper presents the application of spectral analysis methods that are based on the FFT algorithm to the study of the surface EMG power spectrum compression. Some preferred characteristic frequencies used to monitor the spectral compression are the mean and median frequencies. In this work, we show that the spectral density estimation by the Blackman-Tukey method associated with the weightin...

It is the first time that the Chinese Information Processing group of NLPR participates in TREC. Our goal in this year is to test our IR system and get some experience about the TREC evaluation. So, we select two retrieval tasks: Novelty Track and Robust Track. We build a new IR system based on two key technologies: Window-based weighting method and Semantic Tree Model for query expansion. In t...

It is the second time that the Chinese Information Processing group of NLPR participates in TREC. In the past, we have investigated the use of two key technologies: Window-based weighting method and Semantic Tree Model for query expansion, with success, to tasks in novelty and robust tracks. We focused on the Robust Retrieval Track at this year’s conference. Based on the previous IR architectur...

This paper demonstrates that the design of a robust feedback-based Iterative Learning Control (ILC) is straightforward for uncertain linear time invariant (LTI) systems satisfying the robust performance condition. It is shown that once a controller is designed to satisfy the well known robust performance condition, a convergent updating rule involving the performance weighting function can be d...

FIR compensator design for H2-optimal decoupling of measurable or previewed signals in discrete-time linear time-invariant systems is considered. The algorithm for the FIR system weighting matrices computation is based on pseudoinversion techniques aiming to minimize the l2 norm of the overall system impulse responses. The inherent dimensionality constraint of these techniques is overcome by we...

Local probabilistic sensitivity of input variable X with respect to output variable Z is proportional to the derivative of the conditional expectation E(X|z). This paper reports on experience in computing this conditional expectation. Linearized estimates are found to give acceptable performance, but are not generally applicable. A new method of linearization based on re-weighting a Monte Carlo...

In this paper a scheme is presented for recognizing hand gestures using the output of a hand tracker which tracks a rectangular window bounding the hand region. A hierarchical scheme for dynamic hand gesture recognition is proposed based on state representation of the dominant feature trajectories using an a priori knowledge of the way in which each gesture is performed.

iv ACKNOWLEDGEMENTS I would like to thank my advisor, Dr. Sharma Chakravarthy, for giving me an opportunity to work on this challenging topic and providing me ample guidance and support through the course of this research. I am grateful to Altaf Gilani and Dustin for their invaluable help and advice during the implementation of this work. I would like to thank all my friends in the ITLAB for th...

In this paper we present a simpliied proof for the convergence of the windowed Cholesky factori-sation of the time{varying asynchronous CDMA channel.