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13 results on '"Du, Kuan"'

8. Improvement and simulation of clustering routing algorithm in wireless sensor network

Author

Du Kuan, Kong Li-xin, and Li Shujiang

Subjects
Routing protocol, Brooks–Iyengar algorithm, Computer science, business.industry, Distributed computing, Real-time computing, Energy consumption, Key distribution in wireless sensor networks, Wireless, Algorithm design, business, Cluster analysis, Wireless sensor network, Efficient energy use
Abstract

The energy limitation of a wireless sensor network is an important factor which restricts its function. Therefore, how to use the energy efficiently as well as to prolong network's service lifetime becomes a hot issue in this field. Based on the analysis that cluster-head nodes distribution of the LEACH algorithm is uneven in the space, a new corrective method named LEACH-NEW algorithm has been put forward. the threshold T(n) is revised, then the factors of position and energy are taken into consideration, which balance the energy consumption, and prolong the lifecycle of the network greatly. Simulation results show that compared with LEACH algorithm, the lifetime of the LEACH-NEW algorithm is improved greatly.

Published
2011

13. Preparation of Spherical Nanometer ZrO2 Reunion Powders via Single Emulsion Assisted with Homogeneous Precipitation

Author

Du, Kuan He, Chang, Ying, Zou, Jin Fang, Zhu, Qin Biao, and Dong, Shi Jie

Abstract

The water droplets in the microemulsion system of xylene/water/Span-80 can act as a micro-reactor which solubilize Zr(NO3)4, Y(NO3)3, and dimethyloxalate. The homogeneous precipitation reactions will take place in the restricted spaces determined by the droplets size. The micro-reactors help us obtain spherical nanometer ZrO2(Y2O3) reunion powders successfully. The spherical nanometer ZrO2(Y2O3) reunion powders and the precursor powders were characterized by means of TG-DTA, XRD, SEM and laser particle analyzer. It was investigated that the effect of Span-80 concentration on morphology and crystal phase composition of reunion powders. The result shows that as the volume ratio Vxylene:VSpan-80:Vwater= 40:1.0:8, the well spherical and excellent dispersion reunion powders with size of 4-16um were prepared after the precursor powders were sintered at 600℃ for 2h. The Span-80 concentration has no effect on the crystal phase composition of reunion powders, however, has significant effect on the morphology of reunion powders.

Published
2012
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