square aperture sampling 方形孔径采样定理
square-aperture acousto-optical 方光孔径声光器件
square loop aperture 方环孔径单元
The diffraction of Gaussian beams at an square aperture is studied based on the Kirchhoff and Fresnel diffraction integrals.
使用基尔霍夫衍射积分公式和菲涅耳衍射积分公式对高斯光束通过方孔光阑的衍射进行了研究。
It shows that, for the case of the same area, the energy coupling into the square aperture is smaller than that of into the rectangular ones.
结果表明，在孔洞面积相同的情况下，电磁脉冲对正方形孔洞的耦合能量较小；
The paper introduced radiation heat-transfer speciality of radiant porous body, and analyzed radiation Angle coefficient of radiant porous body with square aperture by using numerical differentiation.
介绍了辐射多孔体的辐射传热特性，采用微分法对方形孔道辐射多孔体的辐射角系数进行了数值分析。
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