The concept of "ideal sum of conversion efficiency" is proposed for multiple QPM, as the criterion of judging algorithms.
提出了多重准位相匹配“理论最高效率和”的概念，以衡量算法的效率与精确度。
Sum of any finitely many nil left ideals of A is also a nil left ideal of A.
的任意有限多个诣零左理想之和仍为A的诣零左理想；
We analyze the pattern function of DBF in subarray under the ideal condition and with channel mismatch, and give the pattern functions of sum and difference beam.
本文分析了子阵d BF在理想通道条件及通道失配情况下的方向性函数，给出了其和差波束方向性函数特性。
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