其次，电力网络的典型网络结构有环网、放射型、单端供电型、双端供电型等形式。

Secondly the power network's the typical feature are loop structure , radial type, supply fed at one end and supply fed at two ends.

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本论文研究的复合封装材料以双酚A型环氧树脂EP828／E51作为基体，以氧化铝作为填充材料，有望替代纯环氧固化物作为脉冲压电电源用新型封装材料。

The encapsulate composite for pulsed piezoelectric power supplier was investigated in this paper, in which a bisphenol A liquid epoxy EP828/E51 was resin matrix and aluminum oxide was filler.

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本论文立足于合成一种新型的含有双键的高性能环氧树脂——二烯丙基双酚A型环氧树脂(DADGEBA)，并对该环氧树脂的基本性能及双键与环氧基团双固化的特性进行了研究。

This thesis bases on synthesizing a novel high performance epoxy resin (DADGEBA) containing double bonding and deeply study on the basic performance and double-curing behavior of epoxy DADGEBA.

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