With energy based on the critical characteristics of voice recognition technology, opticaldistance measurement diagram.
基于临界带能量特征的语音识别技术研究，光学测距离原理图。
2
Based on the infrared spectrum absorption characterization of methane gas, the long opticaldistance differential absorption method for methane detection is studied.
基于甲烷气体的红外光谱吸收特性，研究了长光程差分吸收式甲烷气体检测的方法。
3
This paper proves the principle of equal influence is unreasonable in electro-opticaldistance traverses, proposes the reasonable accuracy of angular measure and linear measure.