Xiaoxuan Zhang

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This paper considers online learning with imbalanced streaming data under a query budget, where the act of querying for labels is constrained to a budget limit. We study different active querying strategies for classification. In particular, we propose an asymmetric active querying strategy that assigns different probabilities for query to examples(More)
This paper studies a control problem for optimal switching on and off a cloud computing services modeled by an M=M=1 queue with holding, running and switching costs. The main result is that an average-optimal policy either always runs the system or is an (M; N)- policy defined by two thresholds M and N, such that the system is switched on upon an arrival(More)
— This paper studies optimal switching on and off the full capacity of an M/M/∞ queue with holding, running and switching costs. The main result is that an average-cost optimal policy either always runs the system or is defined by two thresholds M and N, such that the system is switched on at arrival epochs when the number of customers in the system(More)
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