Optimized Feature Extraction for Temperature-Modulated Gas Sensors
Figure 2
Example of the signal response of a tungsten oxide microhotplate sensor to ammonia (500 ppm), nitrogen dioxide (1 ppm) and ammonia nitrogen dioxide () in the phase space domain. The first derivative of the sensor response for a time lag equal to 3 ms (-axis) is plotted verses the sensor response (-axis). Reproduced from [33] Elsevier Science, with permission.
