Social Tagging has become a method of choice for enriching data (like pictures) with meta-data which in turn can be used for searching (like retrieving art pictures) or tag recommendations relying on Singular Value Decompositions (SVD) to reduce dimensionality. We observed that social tagging-based search or tag-recommendation is more successful, if several dimensions describing the tagging com...

We demonstrate the occurrence of regimes with singular continuous (fractal) Fourier spectra in autonomous dissipative dynamical systems. The particular example is an ODE system at the accumulation points of bifurcation sequences associated to the creation of complicated homoclinic orbits. Two diierent mechanisms responsible for the appearance of such spectra are proposed. In the rst case when t...

This note is concerned with the observer design problem for a class of linear delay systems of the neutral-type. The problem addressed is that of designing a full-order observer that guarantees the exponential stability of the error dynamic system. An effective algebraic matrix equation approach is developed to solve this problem. In particular, both observer analysis and design problems are in...

This study investigates the mode identifiability of a multi-span cable-stayed bridge in terms of a benchmark study utilizing stabilization diagrams of system model identified by means of the stochastic subspace identification (SSI). The cumulative contribution ratios (CCR) estimated from singular values of system model was also considered. Observations demonstrated that wind speed might influen...

We consider the problem of robust stability for uncertain systems described in terms of multiple scalar structured time-invariant perturbations, which are norm bounded. The issue we address is the role that the type of perturbation norm plays in the robust stability conditions. To this end, the L p-induced norms (for 1 p 1) on the perturbations are considered, and some simple relations between ...