Dong Hyun Kim
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Latest activity by Dong Hyun Kim-
Dong Hyun Kim commented,
Thank you so much!
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Dong Hyun Kim commented,
I think that’s likely the case. I’ve been working on refining the model continuously, but it hasn’t been going well, which is why I wanted to ask for some guidance. I’ll give it some more try and r...
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Dong Hyun Kim commented,
Ah, I see! Would it look something like this? battery_level[j, d] <= battery_level[i, d] - e * time_drone[i, j] + M * (1 - D[i, j, d] + M*bin_charging(i, j, d)
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Dong Hyun Kim commented,
Oh, I do have a binary variable that indicates whether the drone is traveling alongside the vehicle. for i in range(2 * num_orders + 2): for j in range(2 * num_orders + 2): model.addConst...
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Dong Hyun Kim commented,
for d in range(drone): for i in range(1, num_orders + 1): model.addConstrs(battery_level[i+num_orders, d] >= battery_level[i, d] - e*time_drone[i, f] + charging_rate*time_vehicle[f, l] ...
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Dong Hyun Kim commented,
It’s kind of different questions. Thanks for the commet :)
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Dong Hyun Kim created a post,
Conflict Concern with Conditional Battery Update Constraints for Drone-Only and Drone-with-Vehicle Scenarios in Gurobi Model
AnsweredI’m working on an optimization model that coordinates drones and vehicles for a pickup and delivery task. The model includes two constraints for updating the drone’s battery level[j, d] when it mov...
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Dong Hyun Kim created a post,
Proper way to use big-M method
Awaiting user inputHello, I am a student working on a pickup-delivery problem using drones and vehicles. Currently, I am working with an initial depot at node 0, a final depot at node 2*num_orders + 1, pickup nodes f...