Sökning: "Torbjörn Larsson"
Visar resultat 16 - 20 av 32 avhandlingar innehållade orden Torbjörn Larsson.
16. Mean-Variance Portfolio Optimization : Eigendecomposition-Based Methods
Sammanfattning : Modern portfolio theory is about determining how to distribute capital among available securities such that, for a given level of risk, the expected return is maximized, or for a given level of return, the associated risk is minimized. In the pioneering work of Markowitz in 1952, variance was used as a measure of risk, which gave rise to the wellknown mean-variance portfolio optimization model. LÄS MER
17. Feasible Direction Methods for Constrained Nonlinear Optimization : Suggestions for Improvements
Sammanfattning : This thesis concerns the development of novel feasible direction type algorithms for constrained nonlinear optimization. The new algorithms are based upon enhancements of the search direction determination and the line search steps. LÄS MER
18. Mathematical Modelling of Dose Planning in High Dose-Rate Brachytherapy
Sammanfattning : Cancer is a widespread type of diseases that each year affects millions of people. It is mainly treated by chemotherapy, surgery or radiation therapy, or a combination of them. One modality of radiation therapy is high dose-rate brachytherapy, used in treatment of for example prostate cancer and gynecologic cancer. LÄS MER
19. Treatment Planning of High Dose-Rate Brachytherapy - Mathematical Modelling and Optimization
Sammanfattning : Cancer is a widespread class of diseases that each year affects millions of people. It is mostly treated with chemotherapy, surgery, radiation therapy, or combinations thereof. High doserate (HDR) brachytherapy (BT) is one modality of radiation therapy, which is used to treat for example prostate cancer and gynecologic cancer. In BT, catheters (i. LÄS MER
20. Asset Liability Management for Tanzania Pension Funds
Sammanfattning : This thesis presents a long-term asset liability management for Tanzania pension funds. As an application, the largest pension fund in Tanzania is considered. This is a pay-as-you-go pension fund where the contributions are used to pay current benefits. The Pension plan analyzed is a final salary defined benefit. LÄS MER