Yi Ting Lin
- Total activity 17
- Last activity
- Member since
- Following 0 users
- Followed by 0 users
- Votes 0
- Subscriptions 6
Activity overview
Latest activity by Yi Ting Lin-
Yi Ting Lin commented,
Hi Riley, Thanks for the help.
-
Yi Ting Lin created a post,
max_() function value does not match
AnsweredHi, When I tried to use max_(), sometimes it does not work. See the code below: for i in sub_intersection: for pp in p: for com in range(2,5): m.addConstr(MissQueue_lb[com][pp,...
-
Yi Ting Lin commented,
Hi Marika, Thanks for the reply. I'll check out how to use Model.addGenConstrAnd(). Thanks again for your help.
-
Yi Ting Lin commented,
Hi Marika, I tried to change the sign of eps, but it would lead to both Binary4[2] and Binary4[3] =0.I want to have Binary4[2]=0 but Binary4[3]=1 Is there any other way that might be able to solve ...
-
Yi Ting Lin created a post,
How to deal with the restriction of not being able to use strictly greater/smaller constraints?
AnsweredHi, I tried to use Big-M for conditional constraints. The length of Part 1,2,3,4, can be denoted as Q1,Q2,Q3,Q4. The accumulated length after part 1,2,3,4 join can be denoted as AQ1, AQ2, AQ3, AQ4 ...
-
Yi Ting Lin created a post,
Quadratic objective or bilinear objective's runtime
AnsweredHi, I am building a model with the objective function in non-convex bilinear form. (e.g., minimize (x1*y1)+(x2*y2)-(x3*y3)), however, the run time is really long (longer than 1hr) If I try to refor...
-
Yi Ting Lin created a post,
Conditional constraints with three conditions
AnsweredHi, I am trying to construct conditional constraints, but with three if-then. If b<B1, then a==B1 if B1<=b<=B2, then a==b if B2<b, then a==B2 where B1, B2, a, and b are all model variables. I read ...
-
Yi Ting Lin created a post,
Putting the value of the variables back to the equation to check, but the constraint does not meet.
AnsweredHi, The model I was running declared that it is unbounded but still provides the best objective. In order to check whether I set the formulation right, I try to go through each variable's values. ...
-
Yi Ting Lin commented,
Hi Riley, Great! Thank you so much. Yi-Ting
-
Yi Ting Lin commented,
Hi Elisabeth, Thanks for your prompt reply. If I understand you right, line 197 from the results of the IIS: -infinity<=Onset_of_green_phase[5,LT,under] <=180 and from the model, I have an lb=0 for...