While the queue is unbound in size, enabling adds to return immediately, one cannot take an element from the queue until the delay time has expired.

因为队列的大小没有界限，使得添加可以立即返回，但是在延迟时间过去之前，不能从队列中取出元素。

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With choosing signal time delay and element location of nonuniform array properly, the estimated frequencies and 2 D directions of arrival are unambiguous.

适当地选取时延和非均匀阵列阵元位置，该方法的信号频率和2 D到达方向估计无模糊。

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The sampling data quantity is reduced under the premise of ensuring the location accuracy, and the error effect caused by the time delay of the multiple sampling in every array element is eliminated.

在保证定位精度的前提下减少了采样数据量，并消除了阵元多次采样的时间延迟可能造成的误差影响。

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