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An Ag electrode was surface-modified by ozonation and subsequent electroreduction. The modified electrode was more active and selective than its smooth-surfaced counterpart in reducing CO2 to CO. Surface modification facilitated the formation of a three-dimensional structure on the Ag surface, thereby enlarging the number of reactive species available for CO2 electroreduction. Moreover, the modified...
A LED driver IC with constant current and temperature compensation is presented. The IC is trimmed to provide constant current of 20mA±5% at an input voltage of 6.0-90V. The IC can be used as a two terminal constant current source or constant current sink. And the current is well compensated, at the temperature range of -20 °C ~100°C,the temperature coefficient is 18ppm/°C when input voltage is 40V...
Government procurement performance evaluation is an effective means to expedite the procurement outcome of government's departments. The key factor to setting up an effective evaluation system of government procurement is choosing reasonable evaluation indexes with accurate weights related. The purpose of this paper is to provide a new method based on data mining to improve the GP evaluation system,...
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