Questions tagged [c#]
The c# tag has no usage guidance.
13
questions
6
votes
8
answers
3k
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Ideal programming language for an operations researcher
No single programming language will meet every need. However, there should be a language that most operations research scientists prefer to master.
I have coded different algorithms in Matlab and ...
- 561
2
votes
1
answer
163
views
Scheduling optimization, Adding 4 day same shift and 3 day off weekly constraint
Am writing a small scheduling program in C# for a group of 7 staff who will be working in three shifts daily for 4 weeks. Am using the google OR-Tools Template, but i have modified it abit
This is the ...
- 121
2
votes
0
answers
199
views
CP sat solver approach for task assignment with pre defined task start end times
I spent some time trying to clarify the problem more succinctly.
I has a set of fixed tasks which are of a certain type/category and which can be allocated to a set of workers.
The tasks have ...
- 21
2
votes
1
answer
343
views
CPLEX solver for quadratic problems with barrier algorithm
I'm writing a convex minimization model with a quadratic objective function and linear constraints in C#.
I set CPLEX to solve the problem with the barrier algorithm. The interesting thing is when I ...
- 45
7
votes
1
answer
1k
views
Is there any open source quadratic programming solver with C# API
I have a quadratic programming model (i.e., quadratic objective function and linear constraint) and, I want to solve it on an open-source solver. Since our project developed on C#, we also would like ...
- 73
2
votes
0
answers
225
views
Building model takes so much time in Cplex
I am a beginner in CPLEX. I have a model with about 1 million constants and 800k rows and 1.6 million columns. I implemented in both GAMS and CPLEX (C# as the platform). The final solution for both is ...
2
votes
1
answer
566
views
Using OR-Tools with .NET and GUROBI
We want to model our MILP problem with Google OR-Tools in .NET, and solve it using GUROBI (solver may change in the next 1-2 years). However, we couldn't find the correct syntax to call GUROBI.
https:/...
- 355
1
vote
1
answer
125
views
How to call Cplex.AddMIPStart method
Could you please tell where I can find a method Cplex.AddMIPStart? By that I mean in which library and how to link this library to my C# project.
- 83
3
votes
1
answer
927
views
CP-SAT _ Summing variables under conditions
I have been working lately on scheduling optimization using CP-SAT in OR-TOOLS and now I'm at the point where I need to start considering due dates in my model.
I didn't want to put them as ...
- 119
3
votes
2
answers
170
views
Google OR returning different values depending on language
Lately, I have been working on a CP-SAT model for solving multi-resource flexible job shop problems.
I used the code (1) as an inspiration for building code (2) in Python which works well. Then I had ...
- 119
1
vote
1
answer
486
views
Flexible Job Shop Problem with several resources per alternative - Ortools
It has been quite a journey for me to go from 0 to understanding the job shop (js) and the flexible job shop (fjs) examples given by Google's ORTOOLS team.
Now the time has come for me to start ...
- 11
0
votes
1
answer
152
views
How can I use warm start in C#
I have been working on an MIP in C#. I want to reduce the gap, so I'm trying warm start. I use this code just before solve().
...
- 29
3
votes
1
answer
545
views
Optimal way to ensure optional intervals are consecutive in OR-Tools
I am trying to solve a scheduling problem in OR-Tools. There are lots of "events" that need to be scheduled to "blocks" (essentially half-days). I am naturally using optional intervals for the events. ...
- 141