Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Torbjörn Larsson"'
Autor:
Biressaw C. Wolde, Torbjörn Larsson
Publikováno v:
Operations Research and Decisions, Vol vol. 34, Iss no. 2, Pp 163-182 (2024)
A feasible direction method for linear programming has been proposed. The method is embedded in the framework of the simplex method, even though it works with non-edge feasible directions. The direction used is the steepest in the space of all variab
Externí odkaz:
https://doaj.org/article/42e0592738f74b82bbc7061334658b61
Publikováno v:
Operations Research and Decisions, Vol vol. 32, Iss no. 3, Pp 92-123 (2022)
We study the Parliamentary Pension Scheme of Uganda, a hybrid cash balance scheme which is contributory. It has two categories of members, the staff of the Parliamentary Commission and the Members of Parliament. A long term projection of the scheme's
Externí odkaz:
https://doaj.org/article/e2222bd160814a85b98e03312d0e00d7
Publikováno v:
Operations Research and Decisions, Vol vol. 32, Iss no. 2, Pp 105-124 (2022)
We develop a model for asset liability management of pension funds, which is solved by stochastic programming techniques. Using data provided by the Bank of Uganda Defined Benefits Scheme, which is closed to new members, we obtain the optimal investm
Externí odkaz:
https://doaj.org/article/c740f44ec9a84f92a3b612b888460ca8
Autor:
Torbjörn Larsson, Nils-Hassan Quttineh
Publikováno v:
Operations Research Perspectives, Vol 10, Iss , Pp 100278- (2023)
A linear optimization problem which is amenable to column generation and contains a single parameter in the objective function is considered. We extend and adapt the standard linear programming column generation scheme to effectively and efficiently
Externí odkaz:
https://doaj.org/article/735f8ef6bc314d9ca9acad96bf7024c2
Publikováno v:
Journal of Contemporary Brachytherapy, Vol 13, Iss 1, Pp 59-71 (2021)
Externí odkaz:
https://doaj.org/article/27addf6ca8874deeaaead682f78c705b
Autor:
Torbjörn Larsson, Michael Patriksson
Publikováno v:
Le Matematiche, Vol 49, Iss 2, Pp 249-280 (1994)
See directly the article.
Externí odkaz:
https://doaj.org/article/3f7cea60b19b4b68b987b751569fc954
Autor:
Björn Morén, Majd Antaki, Gabriel Famulari, Marc Morcos, Torbjörn Larsson, Shirin A. Enger, Åsa Carlsson Tedgren
Publikováno v:
Medical Physics. 50:1029-1043
BackgroundIntensity-modulated brachytherapy (IMBT) is an emerging technology for cancer treatment, in which radiation sources are shielded to shape the dose distribution. The rotatable shields provide an additional degree of freedom, but also introdu
Autor:
Nils-Hassan Quttineh, Torbjörn Larsson
Publikováno v:
Operations Research Letters. 50:738-744
Large-scale set covering problems are often approached by constructive greedy heuristics, and many selection criteria for such heuristics have been considered. These criteria are typically based on measures of the cost of setting an additional variab
Autor:
Torbjörn, Larsson
Short open reading frames (sORFs) are codon sequences with a start and stop codon within atmost 100 codons. Cells produce many transcripts from them and some sORFs have been found to have function. sORFs have been associated with embryogenesis, myoge
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-511855
Autor:
Björn Morén, Rasmus Bokrantz, Frida Dohlmar, Björn Andersson, Erik Setterquist, Torbjörn Larsson, Åsa Carlsson Tedgren
BackgroundSpatial properties of a dose distribution, such as volumes of contiguous hot spots, are of clinical importance in treatment planning for high dose-rate brachytherapy (HDR BT). We have in an earlier study developed an optimization model that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a0f2231d004a3b095809ed6e2e0b626
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-190889
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-190889