Short-Time Fourier Transform and Decision Tree-Based Pattern Recognition for Gas Identification Using Temperature Modulated Microhotplate Gas Sensors

<div>The photos of microhotplate gas sensor arrays. (a) SEM photo of a four-element gas sensor array. Each sensor element is a square freestanding membrane supported by four arms. A tungsten thin film resister is embedded in the membrane acting as both heater and thermometer. The SnO<sub>2</sub> sensitive film is sputtered on the top of the microhotplate. (b) Microhotplate gas sensors packaged with DIP16 or TO5.</div>

Journal of Sensors

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Figure 1: Short-Time Fourier Transform and Decision Tree-Based Pattern Recognition for Gas Identification Using Temperature Modulated Microhotplate Gas Sensors 

Figure 1 | Short-Time Fourier Transform and Decision Tree-Based Pattern Recognition for Gas Identification Using Temperature Modulated Microhotplate Gas Sensors 