By analysis of NOx production mechanism, the principles of controlling NOx production and lowering emission of NOx by classifired combustion is described.

But nitriding layer is not growing remarkably with prolonging nitriding time after 8 h;The XRD results indicate that the nitriding layer is not composed of Fe4N and Fe3N,but low nitrogen nitride FeN0.

Simulation of NOx Contaminative Gas Diffusion in the Street Canyon;

Study on Grey Prediction NOx Concentration in Atmosphere and Its Pollution;

Forecasting and controlling method for NOx discharge and environmental air pollution for automotive in Shenzhen;