1) unidirectivity
['ju:nidirek'tiviti]
单指向性
2) single dimensional orientation
单维指向性
3) Unidirectional Microphones
单指向性传声器
4) pointed single frequency modulation jamming
指向性单音干扰
1.
Based on of analyzing the principle of QPSK modulation and demodulation,the BERs of three jamming modes used for QPSK are theoretically derived,and these three modes include the continuous noise jamming,single frequency modulation jamming and pointed single frequency modulation jamming.
由于四相位绝对移相键控(QPSK)的调制方式在卫星通信中占有十分重要的地位,详细的分析了QPSK信号的调制与解调原理,并以此为基础,理论推导出用于QPSK干扰的3种干扰方式的误比特率(BER),这三种方式包括:连续噪声干扰,单音干扰以及指向性单音干扰。
5) one-way metrics
单向指标
6) directivity index
指向性指数
1.
The main differences between radiation angle and coverage angle are given, and the loudspeak′s directivity index is measured by two methods.
笔者对这些变化进行了解读,强调"辐射角"和"覆盖角"的区别,并用2种方法测量了扬声器指向性指数,从而说明新版标准中给出的用覆盖角计算指向性指数的方法简便易用。
2.
The definition of directivity factor,directivity index & equation are introduced firstly.
介绍了指向性因数和指向性指数的定义、计算式。
补充资料：产业的指向性
产业的最优区位应在各点区位因素引力的合力方向上（或引力最大的方向上）称为产业的指向性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条