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Pyrolytic tire char was used to prepare activated carbon by steam. The effects of such factors as pretreatment, activation temperature, rate of water vapor and activation time upon the adsorption properties of AC have been investigated. The prepared activated pyrolytic tire char were characterized by N2 physisorption, XRD, FT-IR and elemental analyses. The optimum process parameters and listed as...
A frequency-tunable dual-band planar monopole antenna for handheld terminals is presented. The designed antenna comprises two meander-line strips on a dielectric substrate. A variable capacitor (varactor) is serially attached to one of the strips, which can tune the resonant frequency from 1.9 GHz to 2.6 GHz, while the other strip keeps almost a constant resonant frequency of 3.5 GHz. The proposed...
A compact tunable internal antenna using a composite right/left handed transmission line (CRLH-TL) for personal communication handset application is presented in this paper. The antenna consists of two lumped inductors, and a variable capacitor to adjust the resonant frequency by controlling the DC bias voltage. Simulation results show that the required frequency can be tuned nearly from 1.8GHz to...
The issue of data updating is the most important issue facing organizations deploying real-time data warehouse solutions. This paper discussed the real-time data warehouse implement method, proposed feasible real-time data warehouse architecture based on SOA. This SOA based real-time data warehouse architecture uses the Web service to pack the various source database systems, and the various changed...
Grid is a 'virtual supercomputer' which combines the resources distributed in different palaces through the network. Aiming at the continual increase of grid resource, and on the basis of comparative analysis of the resource discovery mechanism of the existing networking, a mixed resource discovery model, which combines the distributing and centralizing mechanism together, is proposed in this paper...
At present, traditional data warehouse can no longer satisfy the electric power enterprise's decision support, real-time data warehouse can provide the electric power enterprise with daily tactical operation technical support, and the article discussed the real-time data warehouse implement method, proposed feasible real-time data warehouse architecture based on SOA. This SOA based real-time data...
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