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The refractive index and absorption coefficient of these materials are presented in the range from 0.2 to 1.6THz.

动物脂肪的折射率随频率变化基本不变，并且随温度升高而增大，其值在1.4—1.52之间。吸收系数在0.2—1.2THz随频率的增加而增大。

The argument has been further supported by a simple absorption model and the yielded refractive index and absorption coefficient.

再次，对掺硼氢化纳米硅样品高分辨率电子显微镜的分析证实了有序的区域镶嵌在非晶硅的网络里。

The refractive index and absorption coefficient of an explosive sample were measured by terahertz time-domain spectroscopy.

利用太赫兹时域光谱技术给出了这些炸药样品在0.2THz～2.5THz范围内的折射率和吸收系数。

The design of optoelectronic devices fabricated from III-nitride materials is aided by knowledge of the refractive index and absorption coefficient of these materials.

对三族氮化物材料而言，拥有其反射率及消光系数的知识是有助於制光电元件设计的制造。

Terahertz radiation, which is a kind of electromagnetic wave between the infrared and microwave bands, belongs to far-infrared band. THz time-domain spectroscopy which developed in the 1980\'s has the advantages of high signal to noise ratio, obtaining the absorption coefficient and refractive index of the sample at one time , low energy that can not distroy the biology organise and so on.

太赫兹辐射是指频率位于微波和红外光之间的电磁波，属于远红外波段；20世纪80年代发展起来的THz时域光谱技术，具有信噪比高，能同时获得样品的吸收系数和折射率，能量低，不会对生物组织造成破坏等优点，在材料和生物学等领域得到了迅速的发展和广泛的应用。

The third order nonlinear optical refractive index and nonlinear absorption coefficient are enhanced due to the quantum confinement effects and estimated to be 4×10 -12 m 2/W and 2×10 -5 m/W respectively in nonresonant condition,while 2×10 -11 m 2/W and -1×10 -4 m/W respectively in quasi resonant condition.

结果表明，薄膜的三阶光学非线性折射率系数和非线性吸收系数都由于量子限制效应而大大地增强，在非共振条件下，它们分别约为 4× 10 - 1 2 m2 / W和 2× 10 - 5m/ W，在准共振的条件下，它们分别约为 2× 10 - 1 1 m2 / W和- 1× 10 - 4m/ W。

Absorption spectrta, fluorescence spectra , linear absorption coefficient, linear refractive index, molecule concentration of liquid samples and thickness of thin films were measured.

对自制的偶氮苯样品作吸收光谱、荧光光谱、线性吸收系数、线性折射率以及液体样品的浓度和薄膜样品的膜厚等的测量。

Ray attenuation law ; mass absorption coefficient ; mixture density ; measurement precision

射线衰减规律；质量吸收系数；混相密度；测量精度

Due to the multi-resolution feature of the wavelet transform, the signal that is reconstructed, after using the Birge-Massart strategy to deal with the wavelet coefficient, could be de-noised without losing the power of the absorption line.

根据小波变换多分辨率的特点，对受噪声污染的光谱信号进行小波变换，按照Birge-Massart策略对其小波系数进行阈值处理，实现在保留吸收峰信息的同时去除噪声的目的。

The results show that the optimum mole percent of Al3+ to Yb3+ is 9—11 for high concentration of ytterbium-doped silica-based fiber at which low concentration quenching probability, high absorption coefficient and proper numerical aperture can be obtained.

揭示出在高掺Yb3+的石英基光纤中，共掺Al3+的摩尔浓度为Yb3+摩尔浓度的9—11倍时既可以减小Yb3+的浓度猝灭概率，又可以获得高吸收系数，同时还可更好地满足数值孔径的要求的结论。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。