Spelling suggestions: "subject:"wavelet transformation"" "subject:"avelet transformation""
1 |
Erfassung der Schadensentwicklung von mineralischen Baustoffen mit Hilfe der UltraschallphasenspektroskopieRuck, Hans-Jürgen, January 2005 (has links)
Stuttgart, Univ., Diss., 2005.
|
2 |
Fast computation tools for adaptive wavelet schemesBarinka, Arne January 2005 (has links) (PDF)
Aachen, Techn. Hochsch., Diss., 2005
|
3 |
Automatic ECG analysis using principal component analysis and wavelet transformationKhawaja, Antoun January 2006 (has links)
Zugl.: Karlsruhe, Univ., Diss., 2006
|
4 |
Automatic ECG analysis using principal component analysis and wavelet transformationKhawaja, Antoun January 2006 (has links)
Zugl.: Karlsruhe, Univ., Diss., 2006
|
5 |
A Hierarchical On-Line Path Planning Scheme using WaveletsBakolas, Efstathios 02 April 2007 (has links)
The main objective of this thesis is to present a new path
planning scheme for solving the shortest (collision-free) path
problem for an agent (vehicle) operating in a partially known
environment. We present two novel algorithms to solve the planning
problem. For both of these approaches we assume that the agent has
detailed knowledge of the environment and the obstacles only in
the vicinity of its current position. Far away obstacles or the
final destination are only partially known and may even change
dynamically at each instant of time. The path planning scheme is
based on information gathered on-line by the available on-board
sensor devices. The solution minimizes the total length of the
path with respect to a metric that includes actual path length,
along with a risk-induced metric. In order to obtain an
approximation of the whole configuration space at different levels
of fidelity we use a wavelet approximation scheme. In the first
proposed algorithm, the path-planning problem is solved using a
multi-resolution cell decomposition of the environment obtained
from the wavelet transform. In the second algorithm, we extend the
results of the the first one by using the multiresolution
representation of the environment in conjunction with a conformal
mapping to polar coordinates. By performing the cell decomposition
in polar coordinates, we can naturally incorporate sector-like
cells that are adapted to the data representation collected by the
on-board sensor devices.
|
6 |
Novel techniques for fault location, voltage profile calculation and visualization of transientsEvrenosoglu, Cansin Yaman 15 May 2009 (has links)
This dissertation addresses three different problems in power systems. The first
problem is related to the fault location in complex topologies such as three terminal
circuits with series compensation and mutually coupled line sections and distribution
networks with distributed generation. Novel methods are presented by using traveling
wave approach and wavelet transformation technique to overcome the difficulties
introduced by the discontinuities and integrated components such as Metal Oxide
Varistor (MOV) protected series capacitors and distributed generation in complex
topologies. Simulation results show good correlation between the actual and estimated
fault locations for all the studied cases. The second problem concerns the
calculation techniques of voltage profiles along transmission lines. A simple yet effective
approach to accurately and rapidly obtain the voltage profile along a transmission
line during fault transients is presented. The objective of the presented method is
to eliminate the need to use wave equations and line parameters provided that an
electromagnetic Transients Program (EMTP) type transients simulator is available
for generating bus voltage transients for a given fault. This is accomplished by developing
a time series model to estimate the voltage at an intermediate point along the
transmission line. The model is formed for each intermediate point separately. Once
the model is obtained it can be used to predict the transient voltage at that point
along the line during any fault in the system. The approach can potentially be useful as a post processor to a transient simulator and can be used by developers of transient
animations and movies for illustrating fault-initiated propagation of traveling
waves in power systems. The third problem is the lack of powerful visualization and
animation methods, which can help understanding the complex behavior of power
systems during transients. The goal of this part of the dissertation is to develop new
animation and visualization methods for power system electromagnetic transients for
both educational and research purposes. Proposed approaches are implemented in
different environments such as MATLAB and Microsoft Visual Studio to show the
effectiveness of two and three-dimensional visualization of power system transients.
The implementations of the proposed methods provide better understanding of the
power systems during transient phenomena due to the faults or switchings.
|
7 |
Nichtstationäre Filterung mit Hilfe analytischer wavelet packets am Beispiel von SprachsignalenWeickert, Thomas January 2008 (has links)
Zugl.: Karlsruhe, Univ., Diss., 2008 / Hergestellt on demand
|
8 |
Robuste Risiko-Optimierung mit multi-objective neural networks /Prescher, Martin. January 2008 (has links)
Zugl.: München, Universiẗat der Bundeswehr, Diss.
|
9 |
Multivariante Adaption mit modularisierten künstlichen neuronalen NetzenSartorius, Gerhard January 2009 (has links)
Zugl.: Hagen, Fernuniv., Diss., 2009
|
10 |
Parallele Berechnung der Wavelet-Transformation auf Grafikhardware /Wippig, Dietmar. January 2009 (has links)
Zugl.: Hamburg, Techn. Universiẗat, Diss., 2009.
|
Page generated in 0.1083 seconds