192 reputation
19
bio website
location
age
visits member for 2 years, 8 months
seen 2 days ago

2d
awarded  Caucus
Oct
22
comment Check if intervals overlap
@knedlsepp yes, you are right, the condition (*) is not correct. I should use condition () also for each couple $(i,j)$, not only over the whole set $A$.
Oct
22
asked Check if intervals overlap
Jul
2
awarded  Curious
Apr
26
comment Method for spacing tasks over 24 hour period
In my opinion the problem should be clarified: to me, "balancing workload" and "to evenly space tasks" are not necessarily the same goal, so which one would you address? Do you want to "pack" tasks in three groups of six tasks, where the sum of the duration of the tasks in each group is roughly the same and less than 7 hours and 20 minutes?
Feb
1
comment Is there a name for this type of optimization problem?
There is a typo in the second constraint: $b_1 \cdot x_2$ should be $b_1 \cdot x_1$, shouldn't it?
Jan
28
revised Highest (lowest) index of positive time-indexed variable
edited tags
Jan
28
revised Highest (lowest) index of positive time-indexed variable
Edited tags
Jan
28
comment Transportation problem in supply chain
I do not understand what do you mean by "to solve transportation problem with only members in the chain" and "with multiple members in the chain". For what I get, this is a classical transportation problem where you have finite capacity at each site. You may want to define the flow from each origin to each destination on each level, keeping the capacities and the demands into account (Hint: $x_{ij}$ is the quantity from $i \in \{1,2,3\}$ to $j \in \{A,B,C\}$).
Jan
28
asked Highest (lowest) index of positive time-indexed variable
Nov
16
comment Converting if else constraints into linear ones
Just out of curiosity, in what kind of problem are you using that constraint? what are you representing, if I may ask?
Nov
15
awarded  Organizer
Nov
15
revised Converting if else constraints into linear ones
I suggest to add the mathematical-modeling tag
Nov
15
suggested approved edit on Converting if else constraints into linear ones
Nov
14
revised Converting if else constraints into linear ones
added 4 characters in body
Nov
14
answered Converting if else constraints into linear ones
Nov
11
awarded  Enthusiast
Oct
25
comment Baseball Roster Optimization
I probably would try with evolutionary algorithms, like genetic algorithm (see, for example, genetic-programming.org), or simulated annealing.
Oct
22
comment Optimal production for factories
I think @Christian Blatter's answer is far more accurate, direct and simple than mine. For short, his answer is better.
Oct
22
revised Optimal production for factories
added 48 characters in body