The compressed air is centralized production or dispersion production more economic answers to this problem, depending on the direction of the enterprise requirements.

压缩空气是集中生产还是分散生产较为经济这一问题的答案，取决于企业方向的要求。

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Finally, PCF with large air holes and its applications in dispersion compensation were also discussed.

最后讨论了大空气孔光子晶体光纤的特性及其在色散补偿中的应用。

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Basing on scalar approximation the dispersion property of photonic crystal fibers (PCF) with lower air filling fraction are investigated by an effective index approach in this paper.

基于标量近似理论利用有效折射率方法对低空气填充率的光子晶体光纤(PCF)的色散特性进行了数值模拟。

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It was to help the UK to assess the risk of an attack using biological agents by providing important information about their likely dispersion in the open air during the Cold War.

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