Distributing of electric field intensity and voltage current characteristic inside and outside corona layer are educed.

推导了电晕层内外的电场强度分布和伏安特性。

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The research shows that the top layer is the best distributing layer of the impact of the noise reduction, but the following layer has little difference with the top layer.

研究表明：橡胶颗粒沥青路面降噪效果最佳的分布层位为上面层，但是橡胶颗粒分布于下面层时的降噪效果与上面层相比相差甚微。

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According to the root-controlling and distributing group key management schemes, this paper proposes a novel layer-cluster key management technique and resolves specific defects of the two schemes.

并在集中式和分布式两种组密钥管理方案的基础上，提出了新的层簇式密钥管理架构，并解决了这两种方案存在的安全缺陷。

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