Submitter | Variables | Constraints | Density | Status | Group | Objective | MPS File |
---|---|---|---|---|---|---|---|

Andrew Stamps | 29568 | 72728 | 1.30551e-04 | easy | gasprod | 1375631.6625 | gasprod2-2.mps.gz |

Production planning model of a second industrial gas system. Two model instances included.

Detailed explanation of the following tables can be found here.

Original | Presolved | |
---|---|---|

Variables | 29568 | 24096 |

Constraints | 72728 | 48339 |

Binaries | 6826 | 5461 |

Integers | 0 | 0 |

Continuous | 22742 | 18635 |

Implicit Integers | 0 | 0 |

Fixed Variables | 1911 | 0 |

Nonzero Density | 0.000130551 | 0.000139580 |

Nonzeroes | 280740 | 162580 |

Original | Presolved | |
---|---|---|

Total | 72728 | 48339 |

Empty | 116 | 0 |

Free | 0 | 0 |

Singleton | 680 | 0 |

Aggregations | 3591 | 3149 |

Precedence | 16970 | 13677 |

Variable Bound | 16303 | 9320 |

Set Partitioning | 0 | 0 |

Set Packing | 316 | 272 |

Set Covering | 0 | 0 |

Cardinality | 0 | 0 |

Invariant Knapsack | 3361 | 2889 |

Equation Knapsack | 0 | 0 |

Bin Packing | 850 | 787 |

Knapsack | 0 | 0 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 30541 | 18245 |

General Linear | 0 | 0 |

Indicator | 0 | 0 |

Available nonzero structure and decomposition information. Further information can be found here.

Decomposed structure of original problem (dec-file)

Decomposed structure after trivial presolving (dec-file)

value | min | median | mean | max | |
---|---|---|---|---|---|

Components | 2.697229 | ||||

Constraint % | 0.00214 | 0.125188 | 0.006420 | 33.4581 | |

Variable % | 0.00763 | 0.103155 | 0.011443 | 21.2877 | |

Score | 0.538988 |

Find solutions below. Download the archive containing all solutions from the Download page.

`## Warning in lapply(df["exactobjval"], as.numeric): NAs introduced by coercion`

ID | Objective | Exact | Int. Viol | Cons. Viol | Obj. Viol | Submitter | Date | Description |
---|---|---|---|---|---|---|---|---|

1 | 1375632 | 9e-07 | 3.71e-05 | 3.72e-05 | - | 2018-10-13 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to gasprod2-2 in the collection. This similarity analysis is based on 100 scaled instance features describing properties of the variables, objective function, bounds, constraints, and right hand sides.

Instance | Status | Variables | Binaries | Integers | Continuous | Constraints | Nonz. | Submitter | Group | Objective | Tags |
---|---|---|---|---|---|---|---|---|---|---|---|

gasprod1-2 | easy | 10752 | 3716 | 0 | 7036 | 27169 | 200460 | Andrew Stamps | gasprod | 983.039488258 | numerics aggregations precedence variable_bound invariant_knapsack binpacking knapsack mixed_binary |

gasprod1-3 | easy | 10752 | 3717 | 0 | 7035 | 27169 | 200463 | Andrew Stamps | gasprod | 2310.0993127 | numerics aggregations precedence variable_bound invariant_knapsack binpacking knapsack mixed_binary |

gasprod1-1 | open | 10920 | 4053 | 0 | 6867 | 27695 | 201348 | Andrew Stamps | gasprod | 291.51163698498203* | numerics aggregations precedence variable_bound invariant_knapsack binpacking knapsack mixed_binary |

unitcal_7 | easy | 25755 | 2856 | 0 | 22899 | 48939 | 127595 | R. O’Neill | – | 19635558.244 | benchmark benchmark_suitable precedence variable_bound mixed_binary general_linear |

gasprod2-1 | easy | 29568 | 7389 | 0 | 22179 | 73448 | 282846 | Andrew Stamps | gasprod | 1628548.2968 | numerics aggregations precedence variable_bound invariant_knapsack binpacking mixed_binary |

`No bibliographic information available`

Last Update 2024 by Julian Manns

generated with R Markdown

© by Zuse Institute Berlin (ZIB)

Imprint