本文用半波带法对夫琅禾费光栅衍射进行分析该方法和常用的振幅矢量法相比，分析衍射条纹的位置更要快捷，明了。

The authors show that using the half-wave strip method to deduce the bright and dark fringe conditions of Fraunhofer grating diffraction is simpler than the amplitude vector method.

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根据分流法原理，对带法兰汽车半轴套管近净锻造工艺进行了优化，优化后的工艺所需锻造力是优化前的50%。

Based on divided flow method, the forging technology of near-net-shape deformation of the bushing with flange was optimized, the results show that this process reduces the forging force by 50%.

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