查询词典 absorption coefficient

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 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。

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

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。

We then applied the transfer matrix introduced by Allard to evaluate the absorption coefficient and the transmission loss of the materials and also compared the results to the previous lectures, including experiments and theoretical analysis, to verify the accuracy of the present method.

并将Allard建立的转换矩阵应用在计算材料吸音率及穿透损失。接著，将以往学界所发表的文献和做过的实验，与理论程式互相比对，以印证理论程式的正确性。

The electronic and optical properties of blende phase ZnS systems doped with 3d transition metal ions were studied by the first-principles method based on density functional theory. The density of state, band structure, and absorption coefficient were calculated.

采用基于密度泛函理论的第一性原理方法对掺杂不同3d过渡金属元素的闪锌矿型ZnS系统进行了研究。

The nonlinear inve rse bremsstrahlung absorption coefficient is derived by quantum mechanic method, and the result is discussed.

本文通过量子力学方法得出了非线性逆轫致吸收系数的公式，并对非线性逆轫致吸收系数进行了讨论。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。