The existence of higher ordermode waves in expansion mufflers is proved theoretically.
从理论上推导了扩张室消声器内可能存在的高次波。
2
Hereby, the change ratio of the first ordermode shape is presented as the indicator for structure damage detection.
提出以第一阶振型改变率作为结构损伤识别的标识量。
3
Based on analysis of the insufficient plan modes which are widely used now, a new plan mode, Predict-ordermode in supply chain was proposed for Time Competition.