用所获得的特征值进行SVM模式识别，得到不同熔滴过渡的电弧声能很好地进行分类和辨识，实现了基于电弧声对熔滴过渡类型进行快速识别。
SVM pattern recognition with the feature value can classify arc sound in different metal transfer mode and realize fast recognizing metal transfer mode by arc sound.
在振动力场作用下ldpe熔体的粘度减小，随振动频率的变化有一最小值。
The viscosity of LDPE melt decreases in vibration force field and has a minimum value with vibration frequency change.
试验结果表明，在回路电感值不变的条件下，焊接电流、电弧电压和气体流量是影响熔敷效率的主要因素。
Testing results show that the major factors affecting the deposition efficiency are the welding current, arc voltage and gas flow rate under the condition of same circuit inductance.
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