Spherical particles have minimum scattering area, high packing density; which is beneficial to the luminescent intensity and lifetime of the devices.
球形颗粒荧光粉的光散射面积最小，堆积密度大，有助于提高发光材料的发光强度和使用寿命。
2
The maximum (minimum) of mean wind energy density is 298.
平均风能密度最大值达298。
3
The new criterion includes the integral features of the whole field, while the theory of minimum strain-energy-density factor considers only a single point in the crack tip field.