Questions tagged [test-instances]
For questions that refer to optimization instances used for testing or benchmarking algorithms and software packages.
10
questions
1
vote
1answer
59 views
Difference between Solomon's problem instances
I am in the process of solving the VRP and I have a set of Solomon test instances to test my program.
I actually found a test set with C101, C102, ..., ...
6
votes
1answer
60 views
GAMS: Is there a way to retrieve the gap from the final solve statement
Good evening,
I am looking for a way to retrieve information from the final solve statement. Lower bound and Gap would be nice. I am working with the python api but i can only get the final obj. value ...
0
votes
1answer
93 views
GAMS CPLEX solver solves big problem instances suspiciously fast
I am having trouble with my Problem Instances, which seem to be not "complicated" enough..
Is there a way to find out what the problem is? It is being solved in a matter of seconds even if ...
1
vote
1answer
87 views
How can one iterate over all instances and solve them in GAMS?
I wrote my model down in gams
all sets
parameter
obj. function
constraints
and used $include in order to feed the model differently sized data...
i am currently using
...
1
vote
0answers
39 views
How to automatize instance generation for GAMS?
Gams problem instances can be saved in a .inc file what is basically just a .txt file and u can make gams read from that, but how can i automatize the generation process for those problem instances? I ...
10
votes
0answers
85 views
Is there a library of infeasible MINLP problems?
We have a number of test libraries to test solver performance like MINLPLIB, QPLIB, etc., but the problems in all libraries I know are overwhelmingly on the feasible side.
Is there a library to test ...
18
votes
2answers
201 views
Small Traveling Salesman Problem instance
The Traveling Salesman Problem is perhaps the most studied of all combinatorial optimization problems. There has been a lot work in solving TSP instances to provable optimality. Concorde solves very ...
38
votes
8answers
1k views
Optimization Problem Libraries
Can someone please make a list of optimization problem libraries so that the community can add to and refine it?
I know a few off the top of my head.
15
votes
3answers
329 views
Benchmark problems for scenario-based stochastic optimization
$\newcommand{\E}{\mathbb{E}}$I am working on numerical algorithms for solving convex large-scale multistage scenario-based problems and I am looking for some standard benchmarks problems. I have so ...
12
votes
2answers
183 views
Where can I find test instances for convex quadratic programming?
I am looking for (sources of) convex quadratic programming instances with linear constraints. I am open for both continuous and mixed integer problems, but do not want randomly generated instances.
...
