Istituto di Matematica Applicata e Tecnologie Informatiche     
Bertoluzza S., Pietra P. Space-frequency adaptive approximation for quantum hydrodynamic models. Preprint ercim.cnr.ian//1998-1105, 1998.
We introduce two space-frequency adaptive strategies for the numerical approximation of the solutions of quantum hydrodynamic models for semiconductors, based respectively on wavelets and wavelet packets. The two strategies are compared on a test case, and wavelet packets perform better in approximating with fewer degrees of freedom the high frequency dispersive oscillations of the solution.
Subject Dispersive equations, Space-frequency adaptivity

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