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Low-Rate Wireless Personal Area Network, LR-WPAN built on IEEE 802.15.4 is costless and very simple to use thus making it the most popular choice in sensor data handling and process. The disadvantage of LR-WPAN is the performance of the communication is not stable, hence the biggest challenge is to deal with high packet loss. Such packet loss is mainly due to data overflow at 1 or more nodes as a...
This paper is based on the multi-body dynamic coupling theory and finite element theory. A multi-body dynamic model of the slow-speed ship propulsion shafting system coupled with bearing hydrodynamic lubrication is built by Adams, Matlab and Ansys. The influence of hydrodynamic lubrication is mainly manifested in oil film pressure distribution and bearing reaction force. The oil film pressure distribution...
Structural evolution with temperature of tetraphenylethene (TPE) is followed using THz-TDS. The observed changes in the terahertz spectra are rationalized by performing DFT calculations on experimentally determined low and high temperature crystal structures, thus allowing the changes to be rationalized in terms of the subtle changes in the supramolecular structure.
Variable precision rough set model, as an important probabilistic approach to rough set theory, can deal with many practical problems which involve noise data and cannot be effectively handled by Pawlak's rough set model. Generally, rough set theory based knowledge reduction includes attribute reduction and attribute value reduction. Attribute reduction in variable precision rough set model has been...
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