A circular wideband ultrasonic transducer has been developed by multi-resonance theory.
利用多共振原理设计一种圆形宽带超声换能器。
It is mainly composed of a PZT plate acting as an oscillator and a curved back liner in order to make the system a state of multi-resonance.
它以通常的平板圆形压电晶片作为换能器振子，加上曲面背衬使整个系统达到多共振状态。
It gives two kinds of new utility engineering concepts called resonance transmission chain and multi hole throttle law of shock absorber.
提出了减振器共振传递链和减振器多孔截流律等工程实用概念。
Objective To compare the values of multi-slice spiral CT(MSCT)and magnetic resonance imaging (MRI) in evaluating the unresectability of blood vessels in pancreatic tumor.
目的比较多层螺旋CT（MSCT）与MR评估胰腺肿瘤血管不可切除性的应用价值。
We introduce optical nonlinear medium to multi-layers structure and discuss the influence of optical non-linearity on surface plasmon resonance.
将光学非线性介质引入到多层膜结构中，讨论光学非线性对表面等离子体共振角谱的影响。
Use numerical simulation method to simulate the multi-parametric combination resonance condition for the system, analyse the periodic value, bifurcations and chaos of the system.
并对系统多重参数组合共振情况进行数值模拟，分析了周期解、分岔和混沌问题。
Use numerical simulation method to simulate the multi-parametric combination resonance condition for the system, analyse the periodic value, bifurcations and chaos of the system.
并对系统多重参数组合共振情况进行数值模拟，分析了周期解、分岔和混沌问题。
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