If they have the X-ray powder diffraction patternsof materials, even if being non-expert on X-ray crystal structure, they can conveniently get the index of diffraction lines and cell parameters.

对于非专业X 射线晶体结构人员，只要得到材料衍射图谱后，能很方便计算点阵常数和衍射线指标化。

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This article based on the MTN, and put emphasis on the parameters of liquid crystal display (LCD), such as the elastic constants, dielectric constant, pretilt angle and cell gap.

本文主要针对MTN模式设计，着重关注液晶弹性常数，介电各向异性，预倾角度，以及盒厚变化对显示效果的影响。

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