I research on two methods of crack width calculating, one is through the center line and left-right edges, the other only through left-right edges, and make the latter as the method of this project.
对由中心线和左右边缘求裂缝宽度和由左右边缘求裂缝宽度两种方法进行了研究，采用后者作为本课题的计算方法。
The usual prediction methods of welding deformation include experimental method, analytical method, numerical method and equivalent load method, and the latter two methods are more commonly used.
焊接变形分析方法包括实验法、解析法、数值分析法、等效载荷法等，常用的是后两种方法。
The other methods include: The conventional method of spectrogram parameters, the zero-pole model and the fractal method, the latter two were proposed by the present authors before.
这些方法包括：传统的声谱参数法及以前提出的零极点模型法及分形分析法。
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