The simulation of total energy flow and the density of states show that the dodecagonal QPC has photonic gap for TM polarized electromagnetic waves.

能流和态密度的计算结果都表示十二重准晶光子晶体具有光子带隙。

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The density of plasma rises with increase of laser energy, and the charge flux of plasma is larger than that of combustion flow.

实验结果表明等离子体密度随激光能量的提高而增大，而且激光等离子体的电荷通量大于燃烧流的电荷通量。

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Following with mechanical energy transmission in medium, mechanical energy flow will be produced when the density of mechanical energy varies with time.

物体中机械能密度随时间变化时，伴随着机械能的传递，存在机械能流。

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United Technologies is a fuel cell leader, and David Parekh, director of the United Technologies Research Center, says that expertise has allowed the company to improve the energy density of a standard flow battery by 10 times, albeit on a small scale.

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Power density refers to the energy flow that can be harnessed from a given unit of volume, area or mass.

FORBES: Magazine Article