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Security is an important issue in research and appliance of grid computing. Grid security model is composed of a series of mechanism and strategy to solve various practical security problems. This paper presents a grid security model based on virtual organization referring to GSI (a security component in Globus). The model consists of a logical model and a(More)
So far there have never been systematic evaluation criteria and entire assessment and evaluation system in Data quality internationally. Based on the research on the relative content of both international and domestic data quality, this article analyzes the requests of data quality for the large enterprises. First of all, this paper raises and builds a(More)
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