Abstract
A online method to analyze the composing of car's emission is proposed. In this method, Infrared Spectroscopy theory is used in measure instrument. The emission of car include H2O, CO, CO2, NOx, SOx. None of all the absorption bands can typically sign one of these element. So least square algorithm is used for retrieval of the composing of gas in this paper. The simulations experiment result show that least square algorithm can retrieval the composing of gas in high precision(5%) and Experiment result has shown the feasible.
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