分析了膜片加强筋的筋脉、剖面形状、面形状、角度等对扬声器低频参数的影响，得出了加强筋与膜片等效顺性以及有效振动面积之间的关系。
On the low-frequency parameters of speaker is analyzed, draws the affecting relation of strengthening rib and equivalent compliance , effective vibration area of diaphragm.
红外光谱法测定角质层脂质中C-H对称和不对称伸缩振动吸收峰峰位及其峰面积；
The peak shift and peak areas of C-H stretching vibration absorption were estimated by Fourier transform-infrared(FTIR).
由变幅杆大端直径、放大倍数、面积系数等已知条件，按照变幅杆设计理论对超声振动系统中的变幅杆进行设计；
According to the designing theory of amplitude amplifier pole, it could be designed by big end diameter, magnification, area index and other parameters.
超声振动减小了接触面的有效接触面积；
The ultrasonic vibration changes the friction status between the contact surfaces, and decreases the factual contact area.
大型往复式压缩机功率大、占地面积大，管道振动问题也更为突出。
The pipe vibration problem is especially serious in large reciprocating compressor because of its big power and large bulk.
通过修正金属细棒的长度和横截面积，实现了换能器中纵向振动与弯曲振动的同频共振。
By correcting the length of the metal slender rods, the simultaneous resonance of the longitudinal and flexural vibrations in the transducer is acquired.
本文假设了接近砖烟囱实际截面面积的函数，推出了一个变系数的自由振动微分方程。
In this paper, a cross-section function of brick chimney has been assumed based on traditional hypothesis and a variable coefficient free-vibrating differential equation has been derived.
通过修正金属细棒的长度和横截面积，实现了换能器中纵向振动与弯曲振动的同频共振。
The resonance frequency equations for the longitudinal and flexural vibrations in the transducer are derived.
为了满足大筛面面积钻井振动筛的需要，介绍了一种基于直线运动和圆运动合成原理的三电机椭圆钻井振动筛。
To meet the need of big screening area of shale shaker, a kind of trimotor ellipse vibrating shale shaker based on synthesizing of linear and circular motion is presented.
为了满足大筛面面积钻井振动筛的需要，介绍了一种基于直线运动和圆运动合成原理的三电机椭圆钻井振动筛。
To meet the need of big screening area of shale shaker, a kind of trimotor ellipse vibrating shale shaker based on synthesizing of linear and circular motion is presented.
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