Lars Abrahamsson

6 Questions 8 Answers 0 Followers

Questions related from Lars Abrahamsson

Are there any optimization solvers that make use of dynamic programming techniques?

Are there any (commercial) optimization solvers that make use of dynamic programming techniques when useful?

14 December 2020 3,786 8 View

Single-phase synchronous machine models?

Hi there, In low frequency railways it is common with single-phase synchronous machines. Anyone that knows how to model them dynamically in a trustworhy manner? Moreover, there are many...

19 November 2020 1,738 5 View

SOS1-adapted solvers in GAMS?

Hi, I have heard - but cannot find any documents about it, that some solvers are better at utilizing the "SOS1" variable type, whereas other solvers just converts the problem into one with...

15 March 2020 914 1 View

Where can i find simplistic but relevant equations describing the rail curvature running resistance of trains?

What are the main components that govern the curvature running resistance? Wheel radius? Train speed? Rail curvature? What more?

01 September 2016 1,907 6 View

Where can I read about noniniform sampling in power systems?

Hi, Can anyone suggest relevant and comprehensive theoretical reading of how to handle nonuniform sampling (0.3 and 0.4 seconds respectively) from a low frequency AC power system? Our aims are in...

16 May 2016 9,807 4 View

Opinions and experiences of the LocalSolver solver?

Hi All, Are there any opinions and experiences of the LocalSolver solver? Comparing for example accuracy, speed, etc. to other solvers, etc. Interesting to hear about them ... /Lars

01 January 1970 4,530 9 View