1,692 research outputs found
Computational analysis of flow and stress patterns in thoracic aortic aneurysms : a patient specific study
Imperial Users onl
H2 optimal model reduction on general domains
Optimal model reduction for large-scale linear dynamical systems is studied.
In contrast to most existing works, the systems under consideration are not
required to be stable, neither in discrete nor in continuous time. As a
consequence, the underlying rational transfer functions are allowed to have
poles in general domains in the complex plane. In particular, this covers the
case of specific conservative partial differential equations such as the linear
Schr\"odinger and the undamped linear wave equation with spectra on the
imaginary axis.
By an appropriate modification of the classical continuous time Hardy space
, a new like optimal model reduction problem is
introduced and first order optimality conditions are derived. As in the
classical case, these conditions exhibit a rational Hermite
interpolation structure for which an iterative model reduction algorithm is
proposed. Numerical examples demonstrate the effectiveness of the new method
Nanomanufacturing of titania interfaces with controlled structural and functional properties by supersonic cluster beam deposition
Great emphasis is placed on the development of integrated approaches for the
synthesis and the characterization of ad hoc nanostructured platforms, to be
used as templates with controlled morphology and chemical properties for the
investigation of specific phenomena of great relevance for technological
applications in interdisciplinary fields such as biotechnology, medicine and
advanced materials. Here we discuss the crucial role and the advantages of thin
film deposition strategies based on cluster-assembling from supersonic cluster
beams. We select cluster-assembled nanostructured titania (ns-TiO2) as a case
study to demonstrate that accurate control over morphological parameters can be
routinely achieved, and consequently over several relevant interfacial
properties and phenomena, like surface charging in a liquid electrolyte, and
proteins and nanoparticles adsorption
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