Waves in a spatial queue
Waves in a spatial queue
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空间队列中的波
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
D. Aldous
中科院分区:
文献类型:
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作者:
D. Aldous
Envisaging a physical queue of humans, we model a long queue by a continuous-space model in which, when a customer moves forward, they stop a random distance behind the previous customer, but do not move at all if their distance behind the previous customer is below a threshold. The latter assumption leads to “waves” of motion in which only some random number W of customers move. We prove that ℙ(W > k) decreases as order k− 1/2; in other words, for large k the k’th customer moves on average only once every order k1/2 service times. A more refined analysis relies on a non-obvious asymptotic relation to the coalescing Brownian motion process; we give a careful outline of such an analysis without attending to all the technical details.