ATTENTION, LEARN TO SOLVE ROUTING PROBLEMS 2020-05-09

ATTENTION, LEARN TO SOLVE ROUTING PROBLEMS

Abstract

问题描述
车辆路径问题(Vehicle Routing Problem, VRP), 车辆路线问题最早是由Dantzig和Ramser于1959年首次提出,它是指一定数量的客户,各自有不同数量的货物需求,配送中心向客户提供货物,由一个车队负责分送货物,组织适当的行车路线,目标是使得客户的需求得到满足,并能在一定的约束下,达到诸如路程最短、成本最小、耗费时间最少等目的。

code:
https://github.com/wouterkool/attention-learn-to-route
baseline:
https://github.com/MichelDeudon/encode-attend-navigate 
https://github.com/mc-ride/orienteering 
https://github.com/jordanamecler/PCTSP 
https://github.com/rafael2reis/salesman

参数化一个模型,output一个排列,学习过程是使得这个排列的概率尽可能大.

构建可行解的概率分布,优化分布.

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Attention model

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the encoder computes initial dh-dimensional node embeddings
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image.png

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RL

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Word& Phrase

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