Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Online Allocation with Traffic Spikes: Mixing Adversarial and Stochastic
  Models   Motivated by Internet advertising applications, online allocation problems
have been studied extensively in various adversarial and stochastic models.
While the adversarial arrival models are too pessimistic, many of the
stochastic (such as i.i.d or random-order) arrival models do not realistically
capture uncertainty in predictions. A significant cause for such uncertainty is
the presence of unpredictable traffic spikes, often due to breaking news or
similar events. To address this issue, a simultaneous approximation framework
has been proposed to develop algorithms that work well both in the adversarial
and stochastic models; however, this framework does not enable algorithms that
make good use of partially accurate forecasts when making online decisions. In
this paper, we propose a robust online stochastic model that captures the
nature of traffic spikes in online advertising. In our model, in addition to
the stochastic input for which we have good forecasting, an unknown number of
impressions arrive that are adversarially chosen. We design algorithms that
combine a stochastic algorithm with an online algorithm that adaptively reacts
to inaccurate predictions. We provide provable bounds for our new algorithms in
this framework. We accompany our positive results with a set of hardness
results showing that our algorithms are not far from optimal in this framework.
As a byproduct of our results, we also present improved online algorithms for a
slight variant of the simultaneous approximation framework.

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The categories of this paper are: astro-ph
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The categories of this paper are: math
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ph