Dear Said

I don't know how you can do that in Lingo, but I do know to do that in Solver and using the SIMUS software, since |I have done this several times.

If you believe that this can help you, please contact me and I will be very happy to help.

Dear Said Zahmoun,

I suggest you to see links on topic.

http://www.columbia.edu/~cs2035/courses/ieor3608.F06/lingo-tutorial.pdf

https://www.sciencedirect.com/science/article/abs/pii/S1874597006800184

http://www.lindochina.com/pic/PDF/Optimization%20Modeling%20with%20LINGO%20by%20Linus%20Schrage.pdf

https://www.lindo.com/downloads/LINGO_text/Chapter11.pdf

Best regards

Of cours if SMUS Can help yes i'm ready thank you dear teacher @Nolberto

Thank you dear teacher @Mohamed-Mourad

Dear Said

This is my answer to your last question about changing vectors values each hour. Thank you for your question, very interesting and new, indeed, at least for me. I understand that you want to maximize the benefits of all of your alternatives, each hour. Using SIMUS, you can have that information for all alternatives simultaneously, when you solve the problem, however, that result is valid as long as the performance factors, that is, the components of each alternative vector are constant If you want to have results each hour, I believe that you have to load the decision matrix and run the software., every hour. At the end of the day, you will have all your alternatives 'optimized' at every hour. I put 'optimized' with ' ', because SIMUS will give you the results, but most probably there are not optimal if they exist, but reflecting a satisfactory agreement or a compromise solution in each hour. Don't waste your time looking for optimal solutions, in multicriteria the don't exist One way to practically solve this problem is to prepare an initial decision matrix updated every hour with the new hourly values, transfer this data electronically to SIMUS, and run it. The computer time can be a few minutes, perhaps 3 o4 4, or 30 minutes or more, depending on the complexity of their matrix Probably I could better help you if I know the problem I hope this helps.

Pls., keep me posted.

Dear Said

I am sending you the SIMUS software. Please acknowledge reception

Said

I don't know what is the 'lien' you are requesting

Nolberto Munier lien to download and install the software because i dont find .exe in your file zip

Just open the zip file

Dear @Nolberto I did That's i find just some documents Word and excel not file.exe if you have some vedio about install SIMUS sent it to me muchas gracias profesor .

Dear said,

Please take a look at those links mybe it help you in your work.

https://www.simus-systems.com/en/

https://www.simus-systems.com/en/software-suite-simus-classmate/

https://granitedevices.com/wiki/SimuCUBE_Firmware_User_Guide

Best regards

Dear Said,

I hope that my answer will help the realization of the task you need to perform. I will assume that Pload_i is a parameter associated with power.

To achieve such a constraint, you need to use logical operators; I suggest you check the LINGO documentation. Similarly, I suggest you start thinking about constraints in the following way:

For each index of power, such that Pload_i is less than or equal (LE) (or greater than or equal (GE)) to 5500, perform constraint XX:

@for(power(J) | Pload_i(j) #GE# 5500 : Psystem_i(j) = pw_network(j) + 5500 + phydro(j));

@for(power(J) | Pload_i(j) #GE# 5500 : pw_network(j) = windparc (j));

(2) The second constraint follows the same logic:

@for(power(J) | Pload_i(j) #LE# 5500 : pw_network(j) = windparc (j) - pc_mp(j) - pc_lp(j));

@for(power(J) | Pload_i(j) #LE# 5500 : Psystem_i(j) = pw_network(j) + 5000);

Here is a file I used to test the constraints.

Regards.

Dear Mohammed

Please be advised that the references of SIMUS that you add do not belong to the SIMUS Mr. Said refers to.

He is talking about SIMUS as an MCDM tool used to select alternatives subject to a set of criteria, similar to LINGO, since both are based on Linear Programming.

That SIMUS-Systems that you mention is another software coincidentally with the same acronym, but with a different purpose. As per their advertising on the Web, this software is useful in manufacturing, especially related to data

Ok sory Dear Said and Nolberto.

Thank you all @Nolberto @mohamed @sebastian ✌️✌️✌️💪

Sebastian Muñoz-Herrera thank you but i have some question for you ear teacher chek your reception box i sent you message than you

Dear Said

I did not see any message from you in my incoming mail

hello dear Nolberto Munier sorry i was sick that's why thank you dear teacher .

Dear Said

Thank you for your answer

how can I formulate "if then" constraint in LINGO

my constraint is to tell lingo if the demand is less than this number you're not able to use this source

Dear Meera

I sent an answer but apparently, I misplaced it, and you didn't see it

I am sending it again'

Dear Meera

I very much appreciate your greeting, and I know the beautiful meaning of my last name in Arabic Because of that, and since I am not a Muslim, I guess my answer should be:

wa-Alaikumussalam wa-Rahmatullah

You don’t say which is your problem, however, if you are using Lingo, I gather that your problem is related with selecting an alternative among several, i.e., a MCDM problem

I don't know Lingo, but I understand that it works with the interior point algorithm, while I work with the Simplex algorithm, which of course, must yield the same solution as Lingo for the same problem. The Simplex algorithm, and as I also guess also the interior point algorithm, apply to Linear Programming and thus, with only one objective that must be minimized or maximized. Since this is not the case in MCDM with multiples objectives, I use the SIMUS MCDM method that is based on the Simplex

I believe that you have two ways to do what you want:

1. If you use the IF sentence (an Excel logical function), try to put '= IF(C2 >B2, yes, 0)’, where B2 is the value of the minimum demand allowed, or

2. I guess that you can create a criterion 'Demand' where each component is the demand for each alternative. Then, use the symbol '>' and in RHS put the value of the minimum demand Something like this:

30 x1 + 25 x2 + 21x3 > 19 Pls. let me know if this work