Jiangfei DUAN
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Jiangfei DUANさんの最近のアクティビティ-
Jiangfei DUANさんがコメントを作成しました:
Hi, Thanks for your reply. I set a partial solution, but it solves the partial solution quickly, and here is my log. The log without setting initial solution Academic license - for non-commercial ...
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Jiangfei DUANさんがコメントを作成しました:
Hi, Jaromił, Thanks a lot. You can work with gurobipy and its objects the same way as with other Python modules. This means that you can use other modules such as, e.g., numpy, and the algorithm i...
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Jiangfei DUANさんが投稿を作成しました:
gurobi set initial solution slow down the solver
進行中Hi, gurobi community, I am trying to use an initial solution to speed up the solver (MILP model). But in my case, the initial solution sometimes slow down the solving speed. Here are my two result...
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Jiangfei DUANさんがコメントを作成しました:
Hi, Sorry for my late reply. With the algorithm, I only need to keep K+2 nodes at most at the same time, which can reduce most of the nodes. I think, this can reduce memory (I am not sure if my und...
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Jiangfei DUANさんが投稿を作成しました:
Gurobi MILP branch-and-cut algorithm
回答済みHi, gurobi community, I am trying yo solve a MILP problem with gurobipy. But my model is too large with millions vars and constraints. When solving the problem, I notified that the memory is runn...
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Jiangfei DUANさんがコメントを作成しました:
Hi, Matthias, Thanks a lot, I am trying to follow your advices. But I find, maybe the best way to speed up is to reformulate my model with linear constraints only... Besides, I have a question. I t...
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Jiangfei DUANさんが投稿を作成しました:
How to determine the speed bottleneck of my Model?
回答済みHi, I am new to Linear Programming. To solve my problem, I modeling a complex model, and it takes too long to get a result. I want to speed up it, but I cannot point out the bottleneck. 1. I wonder...
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Jiangfei DUANさんがコメントを作成しました:
Thanks a lot. I got it.
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Jiangfei DUANさんが投稿を作成しました:
How to model the problem of cutting a polyhedron into parts
回答済みHi, I met a problem in my modeling. Here I abstract a minimal question of my problem. Suppose I have a polyhedron (Rectangle, cube for example). For simplify, I use a rectangle as an example. The h...
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Jiangfei DUANさんがコメントを作成しました:
Hi Matthias, Thanks for your reply. 1. \(d_i\) represents the dimension bound of the i-th dim, for example, a 3-dim array (2, 3, 4), \(d_0 = 2, d_1 = 3, d_2 = 4\), the array has 2*3*4 elements. ...