半圆周 meaning in English

semicircumference

This paper studies the least redundant solutions of two - dimensional array system by using the simulated annealing algorithm . two ideal thinning solutions for the two - dimensional circle array were discussed intensively in this paper . one solution uses half - circle configuration with very much reduced number of elements and taking an image by rotating the array ; the other selects element positions around the full circle to provide a roughly uniform coverage in the spatial frequency domain
在一维天线阵设计的基础上，本文利用模拟退火算法给出了两种最小冗余二维圆环天线阵的结构设计方案，一种方案利用天线旋转，在半圆周内稀疏天线；另一种方案通过将空间频率采样点的均匀分布作为优化的约束条件，在全圆周上使天线单元分布达到最优。