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Current traffic noise mapping systems are not ideal for distributed computing in dynamic network. This paper investigates the approach and mechanism of distributed noise map generation based on Service Object Oriented Architecture (SOOA). Service Oriented Computing Environment (SORCER) is employed to build a highly flexible distributed network services space. After that, a SOOA based computer aided...
Most of ID-based signature schemes without trusted PKG are secure in the random oracle model. Design of ID-based signature schemes without trusted PKG which are efficient and provably secure in the standard model is suitable for applications. In this scheme, PKG is prevented from forging a legal user's signature because it only generates partial private key. The scheme is existentially unforgeable...
This paper proposes a novel method of designing chaotic spread-spectrum sequence based on combined Tent-map. The presented combined sequence is almost uniformly distributed over (0, 1), while the traditional chaotic sequences are far away from uniform distribution. Computer experiments show that the combined chaotic sequences are capable of passing the strict Diehard randomness tests, which provides...
Concept lattice, the core data structure of formal context, has high time complexity when it is constructed. This problem has disturbed the further application of concept lattice in data mining. A union method is developed in this paper, which first vertically divide the formal context into distributed stations, construct concept sub-lattices independently, then union them together. The validity and...
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