NOT A TEACHER
I do not see anything wrong with it as far as the structure is concerned. Just one thing, I would use "multi-level" instead of "multi level". It might be correct your way, but "multi-level" is a safe bet.
Would you please check this sentence regarding structure?
As nonlinear multi level programming problems are much more difficult to solve, the proposed model was converted to two nonlinear problems.
NOT A TEACHER
I do not see anything wrong with it as far as the structure is concerned. Just one thing, I would use "multi-level" instead of "multi level". It might be correct your way, but "multi-level" is a safe bet.
Last edited by CarloSsS; 02-Jun-2012 at 17:26.
I'm not a teacher, or a native English speaker. Feel free to edit my posts if you encounter any mistakes in them (be it grammatical or vocabular). It'll help me to improve my command of English.