Sabrin Rashwan

Dear all, I have the next information: R = [1,2,3,4,5] # no of requests rb = {1:1,2:-1,3:-1,4:1,5:1} # takes 1 or -1Cr1 = {1: C[0:3], 2:C[3:6], 3:C[6:9], 4:C[9:12], 5:C[12:15] }Cr2 = {1: C[15:18],2...

  The formulation includes a Big-M . Actually I am not sure of how to calculate it perfectly. I am sharing my calculations hereafter. This Big-M does exist in two inequalities. I can share the ineq...

I have programmed code for optimizing a vehicle routing problem. I have limited the runtime to 2 hours and saved the log to a file ''L2.log''. After obtaining the result I closed the spyder interfa...

I have a constraint dictionary and a list of some infeasible arcs (i,j) Given that the list PD is part of N.  ''' P = [1,2,3,4] #Pick-up nodesD = [5,6,7,8] # drop-off nodes, the range function does...

I have n=4 and P = [1,2,3,4]  , plus the next dictionnaries  d1= {m+10: 0 for m in range(12)}d = {0:0, 1:15,2:30,3:15,4:30,5:15,6:30,7:15,8:30,9:0,**d1}c = {(i,j): np.round(np.hypot(xc[i]-xc[j], yc...

My code aims at optimizing a NP-hard network problem. The network composes of 22 nodes and 484 arcs. I used v = m.getVars() & print(len(v))  to get the number of variables are 2986. However, when I...

I have a model m . I want to code the two constraints shown in the figure correctly.    The different set of data are as follows: ``` R = [1,2,3,4]  K = [1,2] P = [1,2,3,4] D = [5,6,7,8] PD = P ...

I have the above constraint. I have written both the left-hand side and right- hand side. My problem is how to code the ''for'' statement where R, N, Cr are all sets. N\Cr means all elements in N ...

I have a constraint with the right-hand side that needs to choose among three possible numbers. Regardless the left handside, my focus now is on the right-hand side. The constraint is shown in the ...

I have a model with some parameters, variables, and constraints. I have a problem mainly in coding the f parameter that required in a specific set of constraints. Indeed, this shown in the image be...