Lianchen Liu

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In this paper a simple but efficient real-time detecting algorithm is proposed for tracking community structure of dynamic networks. Community structure is intuitively characterized as divisions of network nodes into subgroups, within which nodes are densely connected while between which they are sparsely connected. To evaluate the quality of community(More)
With quick evolution of grid technologies and increasing complexity of e-science applications, reasoning temporal properties of grid workflows to ensure reliability and trustworthiness is becoming a critical issue. Relaxed region analysis (RRA) is proposed in this work for performance optimization of grid workflow verification by decomposing workflows into(More)
Many real-world networks exhibit community structure where vertices belong to one or more communities. Recent studies show that community structure plays an import role in epidemic spreading. In this paper, we investigate how the extent of overlap among communities affects epidemics. In order to experiment on the characteristic of overlapping communities,(More)
Grid data streaming applications are novel from others in that they require real-time data supply while the processing is going on, which necessitates harmonious collaborations among processors, bandwidth and storage. Traditional scheduling approaches may not be sufficient for such applications, for they usually focus on only one aspect of resources, mainly(More)
Conventional autotuning configuration of parameters in distributed computing systems using evolutionary strategies increases integrated performance notably, though at the expense of consuming too much measurement time. An ordinal optimization (OO) based strategy is proposed in this work, combined with neural networks to improve system performance and reduce(More)
To get the distributed and autonomous equipments in Equipment Grid(EG) work collaboratively to serve users as a “supper virtual equip”, “Dynamic Service Composition(DSC)”, a five-layered implemental framework is put forward. Via solving the subproblems in each layer, simple services from local equipments are combined into complex ones to realize the(More)
While a grid represents a computing infrastructure for cross domain sharing of computational resources, the cyberinfrastructure, proposed by the US NSF Blue - Ribbon advisory panel, is expected to revolutionizing science and engineering by including more computer integrated resources, e.g. telescopes and observatories. As a part of the China national(More)