查询词典 optical density

The structural changes in the fibres during drawing process were examined by wide-angle X-ray diffraction,polarising optical microscopy and density gradient column.

利用广角X-射线衍射试验、偏光显微镜观察等方法研究了拉伸过程中纤维结构的变化。

In order to fabricate high–silicon aluminum alloy electronic packaging materials, the oxidating processes in high temperature oxygenation was applied to the Al-30Si and Al-40Si high-silicon aluminum alloys which were prepared through extrusion process. Scanning electron microscope, optical microscopy, thermal physical tester and universal material testing machine were used to study the microstructure, density, hermeticity, coefficient of thermal expansion, thermal conductivity and compressive strength.

摘 要：针对应用广泛的高硅铝合金电子封装材料，采用高温充氧氧化工艺，对已挤压成形的Al-30Si及Al-40Si高硅铝合金材料进行后续处理，通过扫描电镜、金相显微镜、热物性测试仪及电子万能拉伸试验机等，对材料显微组织、密度、气密性、热膨胀系数、热导率及抗压强度进行了分析比较。

This kind of gratings can be kept in the material for a long time. A mode of molecular reorientation was used to explain the formation mechanism of these gratings and it is well consistent with our experimental results. 3. Three kinds of azobenzene polymers P , P (MMA-co-GY7) and P (MMA-co-GO13) were synthesized by radical polymerization. High-density optical storage and the three-dimension (3D) microstructures in the azobenzene polymer films were presented. Twenty gratings have been stored on the same spot in our material. It is twice as many as the best recording that has been reported. It is the first time, a rectangular microstructure and a complicated double layers nesting six-pointed star microstructure are inscribed in it by using a simple two-wave couple setup.

采用共聚反应设计合成了单偶氮苯聚合物P、双偶氮苯聚合物P（MMA-co-GY7）和P（MMA-co-GO13）三种聚合物，研究了偶氮苯聚合物薄膜中的高密度光学存储和3维微结构，成功的将20套光栅储存在样品中同一个点上，是已有报道的两倍；并首次用简单的2波混频光路在该材料中刻写出长方格子和六角星型的微结构，在制作多重不同周期不同角度的高密度光栅结构实验过程中，发现不同周期光栅的刻写顺序对整个微结构形成的最终结果具有决定性的影响，并用相衬显微镜观察了这些微结构图像。

In addition, some parameters evaluating concentrating performance of concentrator are calculated, which conclude optical efficiency, geometric concentrating ratio, energy concentrating ratio and the relative percent of greatest disagreement of the flux density.

另外，计算了评价聚光系统性能的一些参数，包括光学效率、几何聚光比、能量聚光比和接收器上能流密度最大不一致性的相对百分比。

The detail microstructure, composition and optical property of the films have been explored through RBS, XPS, Raman, XRD and IR spectroscopes. The negative bias dependent film growth on the influence of grain size, preferred orientation, and density within grain boundary and volume densification was a significant phenomenon for hetero-deposition.

用RBS，XPS，Raman和IR谱分析薄膜的微结构、成分和光学性质表明，a-CN〓薄膜包含石墨和类金刚石的相成分，加适当的负偏压可增加沉积原子的扩散度，改变薄膜固体结构，影响薄膜的多晶晶粒尺寸、晶面取向、晶界密度和体密度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。