关键词：天线；方向性系数；数值积分；计算机 [gap=1258]Key words：antenna；directivity factor；numerical integration；computer ...
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effective directivity factor 有效方向因子 ; 有效指向性系数
sound directivity factor 声源指向性因数
antenna directivity factor 天线方向性因数
directivity factor of loudspeaker 扬声器指向性因数
It is proposed to use the energy concentration factor and directivity factor as indication of the directivity of the array, and formulae as well as the way of using them are presented.
对切比雪夫阵的指向性提出了用能量集中因数和指向性因数表达的概念，并给出了二者的计算方法和使用范围。
The integrand includes a multiplying factor of the vertical directivity of the noise intensity, and the layered ocean environment affects the spatial coherences via this directivity factor.
积分式中的被积函数包含一噪声强度垂直指向性因子，海洋介质分层条件通过该指向性因子影响噪声场的空间相干。
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