Exact solution of a statistical model for laser beam scattering from diffusing surface has been obtained, the comparison with the approximation of center of gravity has been made.
本文对激光束在漫射表面上散射的一类统计模型给出了严格解，并与“质心近似”所得结果作了比较。
As soon as you uncork a bottle, CO2 starts diffusing from the champagne into the air. But pouring it speeds up that process, by increasing surface area and turbulence.
一旦你打开酒瓶，它就从瓶中挥发并进入空气，但由于倒酒时液体与空气接触的面积扩大，再加上液体的震荡，会使得二氧化碳的释放加快。
It has many advantages, such as high working speed, seal impression is clear and no diffusing, seal surface will not shrink or deform.
它具有制作快捷（客户可即定即做、立等、可取）印迹清晰不扩散，印面不收缩、 不变形的特点。
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