peilin chan
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Activity overview
Latest activity by peilin chan-
peilin chan commented,
Hi Elisabeth, I did use the MIP Start to give a feasible solution. Here is the log: Set parameter MIPGap to value 0.05Gurobi Optimizer version 11.0.1 build v11.0.1rc0 (mac64[x86] - Darwin 22.3.0 2...
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peilin chan commented,
Hi Elisabeth, Thanks for your advices. Since my problem is NP-hard, It is very hard to solve. So I have to spend all the time finding a better solution. I have read the Gurobi doc about Heuristic a...
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peilin chan created a post,
Does more threads mean quicker?
Awaiting user inputHi, I want to find a good-quality feasible solution as quick as possible, and do not care about the lower bound. so I have this setting: model.Params.Cuts = 0model.Params.MIPFocus = 1model.Params.R...
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peilin chan commented,
Get it. Thank you David
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peilin chan commented,
Hi David, Thanks for your advices. Does lazy cuts be considered in the following solve? The cuts I want to add is to exclude some unpromising feasible solutions, which is different from that in TSP...
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peilin chan created a post,
add constraints in callback
AnsweredHi, I want to add some constraints in callback. When a better incumbent is found, that means some variable can be excluded(set to 0) because they can not be included in a better solution. How can i...