index stand meaning in English
指标林
Examples
- The main technical indexes stand leading position in domestic same species of products
其主要技术指标，在国内同类产品中居领先地位。 - A coherent electromagnetic pulse in the range between the far - infrared and microwave region is used as a detection source . the amplitude of the wave is recorded by electro - optical or photoconductive sampling . after fast fourier transform , the amplitude and phase of the wave is given , then the complex refractive index standing for the absorption and dispersion of the material in thz region is extracted
Thz ( 10 ~ ( 12 ) hz )时域光谱技术是20世纪90年代发展起来的一种新型的光谱测量技术，它使用频率介于远红外和微波之间的相干电磁辐射脉冲作为探测源，利用电光取样或光电导取样的方法直接记录thz辐射电场的振幅时间波形，通过傅立叶变换得到测量信号振幅和相位的光谱分布，进而获得材料在thz波段的复介电常数，即色散及吸收等信息。