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Trust management can be applied to deal with a number of security issues in virtual networks. In internet communications, efficient and secure trust negotiation between virtual individuals/organizations is very important because it can achieve resource sharing, collaborative computing and communication security. This investigation aims to strengthen the efficiency and security of trust negotiation...
In this paper, a novel approach is proposed for sensor selection and placement in systems for the purpose of fault detection and isolation (FDI). This new approach benefits from the basic fact that faults are embedded in the analytical redundancy relations (ARRs) and that the occurrence of a fault will cause the corresponding ARRs to change. For FDI purposes, each ARR is connected to a set of sensors...
Since radio channel allocation (RCA) is usually formulated as an NP-hard problem, most existing strategies use heuristic approaches to find sub-optimum solutions with unknown complexity. As an indicator to the complexity, computational scale (CS) is defined as the number of channel reallocations until a network reaches a convergence state. In this paper, we propose a hybrid approach to evaluate the...
A low hardware cost low-density parity-check (LDPC) decoder is presented in this paper. Using logical OR operation in the check nodes for the log sum-product algorithm (Log-SPA), we propose a new architecture for updating the check nodes messages. Synthesized and numerical results show that the proposed architecture achieves up to 21% total hardware reduction with fair BER performance when compared...
An ultrametric tree is an evolutionary tree in which the distances from the root to all leaves in the tree are equal. The Minimum Ultrametric Tree construction problem is the problem of constructing an ultrametric tree from distance matrices with minimum cost. It is shown that to construct a minimum cost ultrametric tree is NP-hard. In this paper, we present an efficient parallel branch and bound...
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