发现在它们的红移、光学光度以及平均光学-X射线谱指数的直方分布图上，X射线选择类星体统计上都分布在这些参数图的低端。
On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.
低收缩率，低光学吸收率，低折光指数粘合剂组合物。
Low shrinkage, low optical absorbance, low refractive index adhesive composition.
实验上验证了带有相反拓扑指数的光学涡流中的螺旋位错在传播过程中会演变为边位错这一理论结果。
This experimental phenomenon proves that the screw phase dislocations evolve into a new type of dislocation—edge phase dislocation with the optical field propagating.
折射率、色散和吸收系数是用于超高速全光开关的光学材料的重要品质指数。
Refractive index, chromatic dispersion and absorption coefficient are material figures of merit for ultrafast all optical switch.
随着光子进入组织深度的增加，漫散射光学层析成像的深度敏感性呈现指数下降分布。
The sensitivity of diffuse optical tomography (DOT) imaging exponentially decreases with the increase of photon penetration depth, which leads to a poor depth resolution for DOT.
用X射线和光学方法测定了各个显露面，确定其密勒指数。
The orientations of all developing facets in the crystals and their Miller indices have been determined by means of X-ray and optical method.
经过紫外氘灯光源照射5个小时之后，薄膜厚度减少了55%，而折射率从1.484减小为1.445，光学厚度更是随着照射时间增长呈现出指数变化。
After irradiated by ultraviolet (UV) light with a deuterium lamp for 5 h, the thickness of film decreases largely by 55%, and the refractive index of film changes from 1.484 to 1.445 at 550 nm.
经过紫外氘灯光源照射5个小时之后，薄膜厚度减少了55%，而折射率从1.484减小为1.445，光学厚度更是随着照射时间增长呈现出指数变化。
After irradiated by ultraviolet (UV) light with a deuterium lamp for 5 h, the thickness of film decreases largely by 55%, and the refractive index of film changes from 1.484 to 1.445 at 550 nm.
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