Among the factors affecting the effect of the treatment, magnetic field density is the most remarkable one, with the frequency comes second.

在影响处理效果的因素中，磁场强度最大，频率次之。

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The method of planar region field density generation from collected scattered data and the color mapping methods of field density visualization were developed.

研究了从采集的离散点场强生成整个平面区域的场强的插值方法，及生成的场强数据可视化的颜色映射方法。

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This paper presents a novel method based on projection moire deflectometry for the visualization and quantitative evaluation of full-field density and temperature variations in phase object.

提出了一种新的投影云纹偏转法用于实时显示和定量测量位相物体的全场密度和温度。

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So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.

不像水或者空气密度的,周期变化，我们这里,讨论的是电场。

麻省理工公开课 - 化学原理课程节选