We estimate the impact of large changes in the relative prices of natural gas and coal from 2005-2011, due primarily to “fracking,” on regional electricity marginal costs and air pollution emissions from electricity producers. We find strong evidence that natural gas is displacing coal as baseload. We estimate marginal emissions over the generation profile for each region in the U.S. using a no...

The experiences of the largest corporation in the world and those of a start-up company show how companies can profitably reduce greenhouse gas emissions in their supply chains. The operations management literature suggests additional opportunities to profitably reduce emissions in existing supply chains, and provides guidance for expanding the capacity of new “zero emission” supply chains. The...

Supply voltage compensation is important to keep the accuracy for hot wire/hot film gas flow sensors. A compensation experiment device is established, the two steps curve fitting is presented to determine the functional relations among flow、sensor output and supply voltage, the coefficient of fitting polynomial is determined by Least Square method, thus eliminating the influence of supply volta...