Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Exact calculation"”.
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First-Principles Study of Electronic Structure and Optical Properties of Semiconductor Surfaces Unified Approach for Exact Calculation of Coupling Coefficients of Quantum Angular Momenta
We present accurate results for the dynamics of an initially localized two-level (TLS) system coupled to a generic dissipative environment and driven by a periodic force which in the semiclassical limit is equivalent to a continuous-wave electromagnetic field. The time evolution is calculated via …
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Event generation at lepton colliders
… of one event and AMEGIC++ deals with the exact calculation of matrix elements. The development of both programs was the major task of my thesis.
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Putsens inverkan på fasadens fuktbalans
… always results in a worse moisture condition. An exact calculation of moisture conditions in rendered walls is not yet possible.On the other a qualitative estimate, which in most cases is sufficient, is simple to carry out.
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Einsatz neuronaler Netze zur Optimierung der Prozeßführung bei der Blasstrahlerzeugung
… iron to steel. Efficiency and quality depend on exact calculation of actual and estimated process parameters. Artificial neural networks (ANN) provide the facility of improving accuracy of process control. Within this thesis, a conception for the use of artificial neural networks for process …
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Rechnerunterstützte Konfliktermittlung und Entscheidungsunterstützung bei der Disposition des Zuglaufs
… accurate modelling of the infrastructure and the exact calculation of occupation times have long been available in (long-term) scheduling and can be used for the exact calculation of timetables 'on-the-spot', as long-term scheduling and short-term train-path management are virtually the same …
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Surface phases and surface phase transitions: A renormalization-group calculation
… methods, previously used in homogeneous bulk calculations, can be generalized to give surface properties. In two dimensions a 4x4 cell-cluster approximation gives critical and thermodynamic properties in quantitative agreement with the. exact results of McCoy and Wu. In three dimensions a …
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Deep learning framework for solving geoacoustic inversion problems using normal mode theory
… language. This enables the efficient and exact calculation of the acoustic field derivatives with respect to environmental parameters using automatic differentiation, providing valuable insights into parameter sensitivities. The results demonstrate that this deep learning framework …
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Liouville resolvent methods applied to highly correlated systems
… many body problems. For the Falicov-Kimball, an exact calculation of the atomic limit shows no sharp metal-insulator transition. A truncation approximation for the full hamiltonian has a smooth evolution from the atomic limit with the opening of a band for the conduction electrons. No phase …
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Εντοπισμός και γραμμική απόκριση ηλεκτρονίων στο άτακτο πλέγμα
… we developed for the first time a method of exact calculation of the localization and transport properties of non-interacting electrons in disordered systems, based on the calculation of probability distributions of variables properly derived from the Green's function of the problem. Such a …
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Spectral and dynamical properties of disordered and noisy quantum spin models
… a random kinetic term and present a diagrammatic calculation of the average density of states, exact in the large-N limit, and interpret the result in terms of the addition of freely independent random variables. In the second part, we turn our attention to noisy quantum spins. Chapter 5 is …
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The multi Davydov-Ansatz
… With the multi Davydov-Ansatz we numerically exactly calculate the dynamics of various open systems coupled strongly to an environment. In particular, we illuminate diverse aspects of laser-driven molecular dynamics in dissipative environments. Based on a rigorous investigation of the …
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Trattamento di Biomasse vegetali e algali finalizzato all'ottenimento di energia. Potenziali sviluppi in Sardegna
… of the biomass energy production requires the exact calculation of the energy needs, the mapping of all the resources available and finally, the definition and implementation of specific strategies. The Biomass Regional Plan is viewed in the overall Regional Action Plan for Renewable Energy and …