In this paper, a method to robust observers design for linear time-delay systems is developed. Firstly, all stable observers for a nominal model are parameterized based on a factorization of its transfer function. Applying those observers on the real system, the problem of selecting the parameterized term, such that the error between the real estimation and the nominal one is reduced, is transf...

In this paper, we propose to study four meteorological and seasonal time series coupled with a multi-layer perceptron (MLP) modeling. We chose to combine two transfer functions for the nodes of the hidden layer, and to use a temporal indicator (time index as input) in order to take into account the seasonal aspect of the studied time series. The results of the prediction concern two years of me...

This paper studies non-proper negative imaginary systems. First, the concept of negative imaginary transfer functions thatmayhavepoles at the origin and infinity is introduced. Then, a generalized lemma is presented to provide a sufficient condition to characterize the non-proper negative imaginary properties of systems. The generalized lemma is given in terms of complex variable s in the quart...

We construct two error feedback controllers for robust output tracking and disturbance rejection of a regular linear system with nonsmooth reference and disturbance signals. We show that for sufficiently smooth signals the output converges to the reference at a rate that depends on the behavior of the transfer function of the plant on the imaginary axis. In addition, we construct a controller t...

Mathematically secure cryptographic algorithms leak significant side-channel information through their power supplies when implemented on a physical platform. These leakages can be exploited by an attacker to extract the secret key of embedded device. The existing state-of-the-art countermeasures mainly focus balancing, gate-level masking, or signal-to-noise (SNR) reduction using noise injectio...

Fourier volume rendering (FVR) is a volume rendering method based on the Fourier slice theorem. With an n × n × n volume data, the FVR algorithm requires O(n2 log n) time to generate a result. Because it requires time less than O(n3) does, FVR is preferred for designing a real-time rendering algorithm with a preprocessing step. We improve upon our previous work. We demonstrate that a B-spline i...