Maliheh Aramon

Hi Rajeev,    If the lot constraints should ensure 1) \(n\) stocks are selected and 2) if a stock is selected, its investment value is \(\geq 0.05\), then you just need to change the type of the \...

Hi Fikri,  Thanks for the detailed explanation of the issue and attaching the log files.    Please see a discussion of the relevant parameters below that you might want to try. You can find more de...

Hi Zhu,    1.The first question: As I asked in the title, what is the difference between the nodes Explored time and the cpu time?   The message "Explored X nodes (Y simplex iterations) in Z seco...

Hi Zeyang,    The real issue is that the constraints do not accurately model the requirements such as maximum and minimum limits on the number of consecutive working days for each employee.    To e...

Hi Yuanyi,  Thanks for reporting this issue. We created a ticket for this to investigate the issue in more detail. We will keep you updated through the ticket.  Best regards, Maliheh

Hi Ivana,    Thanks for the further clarification.    If we write the result of the Model.computeIIS() method for \(i=2\) and \(j=0\) into a file, we see the following: MinimizeSubject Tocol0: z[0]...

Hi Danning,    Yes, we modelled the constraint below before: \[\mathrm{if~~} d_i =1 \implies \sum_j x_{ij} \geq 1\]   However, you are interested in modelling different constraints: \[\mathrm{if~~}...

Hi Andrew,  I opened a support ticket for this in our Zendesk system and we will get back to you through the ticket.  Thanks for your patience! Best regards, Maliheh

Hi Jose,  As you mentioned, the best approach is to minimize \(\ln(Q_{\mathrm{loss}})\). We have: \[\ln(Q_{\mathrm{loss}}) = y + \frac{-31700 + 370.3 \times \mathrm{C\_Rate}}{RT} + 0.55 z\] where \...

Hi Danning,  Given the code, the behaviour you see is expected. Gurobi optimizes the objective functions in descending order of their priority values. In your model, the objective term_3 has the hi...