基本解释：声频谐波失真
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In order to control the audio frequency vibration and extend the absorbency range of dynamic vibration absorber, based on the study of wide band straight beam vibration absorber, the twist-beam dynamic vibration absorber is studied in this paper.为了满足对声频振动控制的要求,拓宽动力吸振器的吸振频率范围,本文在对直梁宽频带动力吸振器研究的基础上,研究了螺旋曲梁式动力吸振器。
The acoustic frequency characteristic formatted from the underwater burning of pyrotechnic composition was also studied with the testing system for underwater acoustic.为研究一种新型的水声无源干扰材料,采用水声测试系统,对具有脉动燃烧效应的烟火(yào)的水中燃烧进行了试验研究,测试了所形成的声频特性,并探讨了其形成的原因。
Effect of ultrasonic frequency on structure of carbon nanotubes and catalytic activity of PtRu/CNTs catalysts for methonal electro-oxidation;超声频率对碳纳米管结构及其负载PtRu催化剂催化活性的影响
The effect of ultrasonic frequency on the morphology and phase composition of coating was investigated by SEM,EDAX,FTIR and XRD.采用声电沉积工艺在炭/炭复合材料表面制备了磷灰石生物活性涂层,借助SEM,EDAX,XRD,FTIR等分析测试手段,考察了超声频率对涂层组成、结构和形貌的影响。
The effect of ultrasonic frequency on the structure, surface texture, and surface groups of activated carbon (AC) was investigated by field-emission scanning electron microscopy, N_2 adsorption, and temperature-programmed desorption.以不同超声频率处理后的活性炭为载体,以钡和钾为助剂制备了一系列钌基氨合成催化剂,并考察了其性能。
