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In most wireless sensor network applications a large amount of data has been continuously collected for future data query and analysis, so how to store them becomes one important challenge in such wireless sensor networks. Recently a kind of storage node has been introduced as a useful technique to solve the storage challenge, so the placement of storage node becomes an important issue in such wireless...
In the wavelength routing networks (WRNs), one of the major challenges is the dramatic increase of node size and complexity. As an alternative solution, waveband switching (WBS) is introduced to group multiple wavelengths together as a band or fiber and switch them using a single port whenever possible. The WBS efficiency is defined as the ratio between the ports required under the WBS networks and...
Attribute reduction is one of the central issue in the theoretical research of rough set, aiming at the NP-hard problem of acquiring minimal reduction and all reduction, an optimization algorithm is proposed to construct reduction tree based on discernibility matrix for acquiring attribute reduction. The discernibility set is acquired by improving discernibility matrix first, then the core and reduction...
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