far field

基本解释

The eXpression of directivity of far field and near field was derived.
推导出了此类换能器的远场指向性和近场声压的表达式。
This method can obtain the estimation of the steering vector directly and is adaptive to both far field and near field models.
该方法可直接获得导向矢量的闭式估计，并且该方法可适用于阵列远场、近场接收信号模型。
In the case of far field sources, based on the subspace direction-finding technique, a new method for active calibration of array shape is presented.
文中基于子空间类测向方法，在远场情况下，提出了一种新的估计阵元位置误差的有源校正算法。

He adds that Russia in this field is far behind what he calls the modern civilized world.
and so there are some products where... at least, as far as, I don't know this field very well,
所以有的产品……至少，我对这个领域不是很了解，
广告和价格的关系 - SpeakingMax英语口语达人

Because of those far-field sensors, in particular, the Nest knows that you're not at home if it hasn't detected movement in ages.
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Maybe not, but so far the field of Republican presidential candidates is sounding like a very hawkish lot, and recovering control of both the White House and Senate next year would give the GOP options for trimming other types of federal spending that are not feasible in the present political climate.
FORBES: GOP Electoral Victory In 2012 Could Rescue Defense Industry