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CdS-TiO 2 and CdS-C 60 /TiO 2 were prepared using C 60 , cadmium acetate dehydrate [(CH 3 COO) 2 Cd·2H 2 O], sodium sulfide (Na 2 S·5H 2 O) and titanium (IV) n-butoxide by a sol–gel method. The prepared sonocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX)...
This paper presents a design method of current-balancing circuits for parallel connected LED strings. Current LED error strings caused by characteristic deviations could not only reduce the life time of a particular point of LEDs by thermal spot but can also causes non-uniform luminance of the lighting device. Among the methods for solving this problem, a method using current-balancing transformers...
The access impedance of the power line channel is time variant. This feature of the power line channel is the main cause of impedance mismatching between the access impedance of the power line channel and the output impedance of the power line communication system and impedance mismatching lead to the problem of reducing the communication range. Therefore, it is very important to match between the...
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