And the object space aperture angle is the dominant factor that makes the distribution of Poynting vector lose circular symmetry.

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Introducing the symmetry of circular operator, an improved morphological detection algorithm is proposed for binary images to avoid the rotation of structural elements so as to raise the detection efficiency.

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In this paper the defocused point spread function can be assessed through knife-edge function curve, according to the circular symmetry of the defocused image.

指出了由于模型不能準確逼近實際的離焦點擴散函數而導致離焦模糊圖像復原無法取得預期效果。

First, if the nucleotide consists of a unit having circular symmetry about an axis parallel to the helix axis, the whole diffraction pattern is modified by the form factor of the nucleotide.

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Under the electron microscope, the virus was circular, icosahedral symmetry and had the non-pouch membrane.

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An exact solution of velocity distribution for Couette shear flow in a non circular conduit with axial symmetry section is obtained in this paper.

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By the analysis of stress distortion of circular load symmetry flat plate, starting from the entire deriving course of thickness calculation formula, derives the simple formula of calculating blind flange thickness, which is fit for oral calculation of hydrostatic pressure testing of in-situ equipment and pipeline.

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Then three candidate modulation schemes exploiting spatial dimensions are proposed. At last, the three modulation schemes are compared by power efficiency and bandwidth efficiency. It shows that spatial quadrature amplitude modulation scheme is appropriate for long distance wireless optical communications for its high bandwidth efficiency and spatial circular symmetry.

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It also can be used to measure the geometrical tolerance, such as straightness error, roundness error, cylindricity error, parallelism error, perpendicularity error, angularity error, coaxiality error, symmetry error and circular run-out error etc.

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