A box groyne is composed of various types of single groyne to satisfy the different river ecological requirements.In ord......

双连环网(DLN)作为一种网络结构最初于1974年由D.Coppersmith和C.K.Wong提出.近年来,对DLN的研究日渐广泛.众所周知,DLN的最小距离......

This paper represents the performance analysis of the different shapes of antenna balun and feeding techniques for step ......

本文从工程人员常用的简化方法入手，采用非线性分析程序分析了大量算例，建立了Ｌ形、Ｚ形截面承载力与腹板矩形承载力之间的关系，将复杂的......