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In this paper, a stream color image cryptography has been proposed based on spatiotemporal chaos system. One-way coupled map lattices (OCML) are used to generate pseudorandom sequences and then encrypt image pixels one by one. By iterating randomly chosen chaotic maps from a set of chaotic maps for certain times, the generated pseudorandom sequences obtain high initial-value sensitivity and good randomness...
In this paper, an improved colour image encryption is proposed, which is based on a chaotic logistic map and the one-way coupled-map lattices (OCML) model. The results of several experimental, statistical analyses and key sensitivity tests prove the security robustness of the proposed cryptosystem.
Mobile WiMAX is a wireless protocol for broadband wireless access that utilizes TDD OFDMA. The WiMAX frame begins with a preamble symbol that establishes frame timing and initial symbol timing for the mobile. In a mobile, the preamble symbol detection is often accomplished by a delay correlation detector. Delay correlation detectors take advantage of the preamble symbols redundancy. Previous detection...
Data mining technique can extract desired knowledge from existing databases and ease knowledge acquisition bottleneck of fault diagnosis. A new knowledge acquisition method combined of decision tree and rough set theory is thus proposed for fault diagnosis in this paper. Based on the reduction by rough set theory, decision tree extract diagnostic knowledge from the reduced decision tables in the form...
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