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Optical orthogonal codes (OOCs) have application in OCDMA system because of their good correlation properties. In this paper, two correlation-detection methods, difference method and distance method, were studied. Calculate amount of these correlation-detection methods was analyzed. Constraint condition of optimal optical orthogonal codes was discussed. Besides, a construction method of optimal (n,w,1)...
In this paper, we propose a new Dynamic Reputation Evaluation Model (DREM) to meet the requirement of characteristics and security in hierarchical Ad Hoc networks. In this model, the reputation relationship is defined with the consideration of related node roles and functions, and the reputation evaluation mechanism is built based on the correlation among nodes to evaluate and update the reputation...
Association rules mining is an important task in data mining and the normal measures support and confidence are useful for finding association rules between the items. However, the process of finding frequent items would prune infrequent items which may include some useful relationships of association patterns. The new measures comsup, comcof and comsup' are proposed to resolve this problem effectively...
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