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The desorption test was conducted to evaluate the desorption behavior of Pb(II) and Cd(II) using citric acid. The influential factors that were considered included initial Pb(II), Cd(II) contamination levels in soil, concentration of citric acid, reaction time, soil pH value and ionic strength. The test results indicated that the desorption was a rapid reaction (less than 6 h), and the removal percentages...
With the development of wireless communication, the characteristics of radio propagation become more and more important. Channel measurement and computer simulation are widely used in radio propagation research. For convenience, simulation based on FEKO was presented in this paper. The effect of frequency, antenna location, antenna height and conductivity on propagation characteristics in corridor...
Mobile WiMAX's scheduling service is a key factor in Radio Resource Management (RRM) in realizing Quality of Service (QoS). The choice in scheduling algorithm for Mobile WiMAX base stations, albeit outside of the scope of the standard, critically impacts the performance and robustness of Mobile WiMAX networks. This paper provides an in-depth study of four major scheduling algorithms: Round Robin (RR),...
With the steady development of WiMAX based broadband wireless access networks, complete and accurate simulation studies become crucial. In an effort to further improve our ns-2 simulation model for mobile WiMAX, we have implemented a selective repeat automatic retransmission request (SR-ARQ) mechanism into our model and evaluated its performance and accuracy. In this paper, we present the design and...
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