Sökning: "propagators"
Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet propagators.
1. Transient waves in nonstationary media : with applications to lightning and nonlinear media
Sammanfattning : Propagation of transient waves in nonstationary, inhomogeneous, dispersive, stratified media is considered. Waves originating from sources exterior to the scatterer as well as from internal sources are treated. Algorithms are developed and illustrated by computations of wave phenomena in stationary, nonstationary and weakly nonlinear media. LÄS MER
2. Scattering on the Timoshenko Beam. Direct and Inverse Problems in the Time Domain
Sammanfattning : This thesis concerns the use of time domain methods for treating direct and inverse scattering problems for flexural waves on beams. The Timoshenko equation is used throughout to describe the behaviour of such waves. LÄS MER
3. Propagation of singularities for pseudo-differential operators and generalized Schrödinger propagators
Sammanfattning : In this thesis we discuss different types of regularity for distributions which appear in the theory of pseudo-differential operators and partial differential equations. Partial differential equations often appear in science and technology. LÄS MER
4. Electronic spectra and lifetimes with polarization propagators and geminal product wavefunctions : applications to Be, CH+ and Li2
Sammanfattning : .... LÄS MER
5. A framework for designing constraint stores
Sammanfattning : A constraint solver based on concurrent search and propagation provides a well-defined component model for propagators by enforcing a strict two-level architecture. This makes it straightforward for third parties to invent, implement and deploy new kinds of propagators. LÄS MER