directivitiesBNC²³⁶²¹³⁺¹ 基本例句 计指向性；方向性原型directivity的复数 Based on the calculation of the characteristic parameters of curved surface dipoles by moment method, the directivities are optimized, the maximum directivities of curved surface dipoles are obtained. 本文在矩量法计算曲面偶极子特性数据的基础上对方向性系数进行了优化，得到了曲面偶极子方向性系数的最大值。 cnki