Questions tagged [mixed-integer-programming]

For questions about mathematical optimization problems involving both continuous and binary or general integer variables.

60 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1
vote
0answers
78 views

Benders Decomposition Problem

$$r_{m_h,s}(n)=\frac B{m_hb_\ell s}\log_2(1+\gamma_{m_h,s}(n))$$ How to deal with multiple subproblems in Benders decomposition when the original objective function is in product form of an integer ...
1
vote
0answers
75 views

Ways to improve lower bounds while solving MIPs

What are the ways to improve lower bounds while solving a minimization problem (MILP)?
1
vote
0answers
69 views

Converting Nonlinear Program into an LP

I have a problem with a nonlinear objective function which is \begin{align}\min&\quad Z_j\cdot(N_j)^{0.5}\end{align} where $j$ is the index. I want to know how can I turn it into a linear ...
0
votes
0answers
75 views

Products distribution planning model

I have a problem of planning the distribution of products for a month. I have different unique products. A Mandate is provided for each product, and the Mandated quantity for each product is to be ...
0
votes
0answers
50 views

Lower bound very bad. How to improve?

I have the following MILP: \begin{alignat}{2} \nonumber \mbox{minimize } \quad & \phi = \sum_{i=1}^{m-1} \sum_{f=1}^{F} \sum_{\underset{\bar{f} \neq f}{\bar{f}=1}}^F \sum_{h \in H} \left( D_{f \...
0
votes
0answers
93 views

Check VRP instance is feasibility

Beforehand, this is a very long thread, in case you want to know in advance, to see if this thread's interests match with yours, this thread concerns fast ways of determining whether a VRP instance is ...
0
votes
0answers
86 views

Problems with a MILP

I need some advice, any hints will be appreciated. I have a MILP and I am using Gurobi to solve it. I have a feasible integer solution. When I use mipstart, after ...
0
votes
0answers
89 views

Mixed Integer Programming - Model Formulation for A Resource Allocation Problem

There are a number of orders, which needs to be shipped. For each order, there may be 1 to 3 route options. The problem here is to find out the best allocation (combination) of orders among these ...
0
votes
0answers
87 views

MILP formulation for "if (a>=b) then c=1, 0 otherwise"

I need to build a MILP (Mixed integer linear programming) constraint form this if-else statement. In my formulation a and b are two continuous variables and c is boolean. if (a >= b) then c = 1, 0 ...
0
votes
0answers
38 views

Interger programming using gray encoding

Could anyone suggest me a tool or library which takes an integer programming problem written in DOCPLEX or CVXPY as input and outputs the equivalent problem using Gray binary encoding? I am happy to ...

1
2