首先，请根据最近的需求到gurobi的中文网(Gurobi 中文网站-Gurobi 中国)上进行浏览，一共有三个版本——免费（会有模型大小的限制相对于cplex的免费版会强大一点）、学术版和付费版，因为我是申请了学术版，付费版应该也差不多，可以参考，所以我就介绍一下 ...

May 1, 2024 · In your case I don't think that adding more threads/ switching to the cloud will help Gurobi to solve the problem. Usually if Gurobi can't find at least one feasible solution after reasonable amount of time I personally would prefer to revise the model specification (remove constraints, break model in parts and etc).

Jul 10, 2017 · Note also that Cplex and Gurobi come with their own Python based modeling interfaces (these may offer access to the more esoteric aspects of the solvers). One advantage of Pulp is that you can develop the model with an open source solver and then switch to a commercial solver without changing the model code.

Oct 20, 2016 · Very late to the question but hopefully this will help new visitors. Starting in version 2.3 of PuLP, the common warmStart interface supports the GUROBI api. By following the instructions here you should be able to warm start the gurobi solver without having to tinker with the pulp internals or the gurobi package.

Sep 1, 2017 · I'm using Gurobi in Python and for a given set S I'm adding the constraint as follows: for i in S: m.addConstr(quicksum(x[i,j] for j in (set(V) - set(S))) >= 2) I want to print these constraints for each value of the sets S and V on the screen.

Apr 7, 2022 · You should always try to use Python iterators directly instead of using range(len(R).. So, a better way of writing these constraints (there are actually |P| many) is

Jun 4, 2024 · As an alternative to Gurobi (if you won't be able to pass all your constraints to the model) I would suggest to have a closer look on differential evolution algos like scipy.optimize.differential_evolution. They work very well with non-linear systems that have less than 40-50 variables.

Aug 25, 2018 · I am using Gurobi and in one part of my code I am defining a constraint which can accept two different value. for example 1 or 2. in the blow is a semi code of my implementation: m = Model("mip1")

Jan 19, 2019 · However, when I tried using gurobi solver by altering the code as shown below, I am not able to get any results. opt = SolverFactory("gurobi", solver_io="python") or. opt = SolverFactory("gurobi") The error:

Oct 26, 2020 · Gurobi and CPLEX are solvers that have been very popular in recent years. CPLEX is easier for academics in terms of the license. It is also said to be very high in performance. But Gurobi is claimed to be the fastest solver in …