Xiaoxuan Zhang

Learn More
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)
How to reduce the transmission latency is a main concern in the context of Mobile Visual Search (MVS). Transmitting extremely compacted visual descriptor in a progressive manner is the start-of-art solution. In this paper, we present a novel MVS system following the client-server architecture. To reduce the transmission latency, the inquiry image is(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)
A GM(1,1) control model with pure generalized AGO is proposed for the sample series which has jump points during the output process. Then the algorithm for determining the pure generalized AGO matrix is given. A prediction control example is given to demonstrate the feasibility of the proposed scheme
  • 1