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In a massive stream of sequential events such as stock feeds, sensor readings, or IP traffic measurements, tuples pertaining to recent events are typically more important than older ones. It is important to compute various aggregates over such streams after applying a decay function which assigns weights to tuples based on their age. We focus on the computation of exponentially decayed aggregates...
A multilevel non-uniform grid (MLNG) algorithm is used for acceleration of iterative integral equation based analysis of scattering from arbitrary shaped large bodies. The acceleration is achieved by replacing the matrix-vector products performed by an iterative method of moments (MoM) solver by an equivalent fast field evaluation via the MLNG algorithm. The MLNG field evaluation scheme is based on...
To overcome the disadvantages of the existing task duplication-based algorithms, this paper discusses the scheduling objectives of distributed real-time tasks, presents a novel structure called scheduled cluster tree, and proposes a general optimization method for various task duplication-based algorithms. According to the result of experiments, PSO_I and PSO_II are both general algorithms that improve...
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