Sökning: "Ill-posed"

Visar resultat 26 - 30 av 37 avhandlingar innehållade ordet Ill-posed.

1. 26. Computational topology optimization in continuum mechanics

   Författare :Thomas Borrvall; Martin P. Bendsøe; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : This dissertation concerns theoretical and computational methodologies in topology optimization in continuum mechanics.A general procedure for treating problems of this kind starts with the establishment of a well-posed continuum problem formulation, in the sense that one can prove existence of at least one solution to the problem. LÄS MER

3. 27. Skew-symmetric matrix pencils : stratification theory and tools

   Författare :Andrii Dmytryshyn; Bo Kågström; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Investigating the properties, explaining, and predicting the behaviour of a physical system described by a system (matrix) pencil often require the understanding of how canonical structure information of the system pencil may change, e.g., how eigenvalues coalesce or split apart, due to perturbations in the matrix pencil elements. LÄS MER

4. 28. CONTRIBUTION TO QUANTITATIVE MICROWAVE IMAGING TECHNIQUES FOR BIOMEDICAL APPLICATIONS

   Författare :Tommy Henriksson; Ylva Bäcklund; Magnus Otterskog; Hans Sköld; Jean-Charles Bolomey; Nadine Joachimowicz; Alain Joisel; Paul M. Meaney; Christian Pichot; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantitative Microwave Imaging. Inverse Problems; Nonliear Inverse Scattering; Diffraction Tomography; Breast Tumor Detection; Biomedical Imaging; Mammography; Calibration; Modeling; Planar 2.45 GHz Microwave Camera; Robot-based flexible multi-frequency data acquisition; Electrophysics; Elektrofysik; Elektronik; Electronics;

   Sammanfattning : This dissertation presents a contribution to quantitative microwave imaging for breast tumor detection. The study made in the frame of a joint supervision Ph.D. thesis between University Paris-SUD 11 (France) and Mälardalen University (Sweden), has been conducted through two experimental microwave imaging setups, the existing 2. LÄS MER

5. 29. Some aspects of optimal switching and pricing Bermudan options

   Författare :Ali Hamdi; Boualem Djehiche; Henrik Hult; Luis Alvarez; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis consists of four papers that are all related to the Snell envelope. In the first paper, the Snell envelope is used as a formulation of a two-modes optimal switching problem. The obstacles are interconnected, take both profit and cost yields into account, and switching is based on both sides of the balance sheet. LÄS MER

7. 30. Calibration and Hedging in Finance

   Författare :Love Lindholm; Anders Szepessy; Erik Lindström; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finance; local volatility; calibration; optimal control; hedging; quadratic hedging; equity; index; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics;

   Sammanfattning : This thesis treats aspects of two fundamental problems in applied financial mathematics: calibration of a given stochastic process to observed marketprices on financial instruments (which is the topic of the first paper) and strategies for hedging options in financial markets that are possibly incomplete (which is the topic of the second paper).Calibration in finance means choosing the parameters in a stochastic process so as to make the prices on financial instruments generated by the process replicate observed market prices. LÄS MER