The"Elements"(of Euclides Geometry)which Ricci and Xu Guanqi, an outstanding Ming scientist and minister of rites, jointly translated, spread the knowledge of plane geometry in China.
他与明代杰出的科学家，后来官居礼部尚书的徐光启合译的《几何原本》，对西方平面几何知识在中国的传播起了巨大的作用。
Based on specially array geometry designation, the angular spread could be estimated by substituting the estimated DOA into the amplitude information vector.
根据相干分布源的近似模型可知，在小角度扩展情况下，角度扩展主要影响广义方向向量各元素的幅度。
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