当不使用造影剂时，谐波是由非线性传播产生的。
When no contrast is employed, harmonics are generated by tissue itself as a result of nonlinear propagation.
本文研究理想流体中薄质球壳受激振动辐射声波的非线性传播。
This paper deals with the non-linear propagation of sound waves radiated by a thin spherical shell vibrating in ideal fluid.
本文也简述了测量超声非线性畸变的实验方法，指出了超声非线性传播中某些有兴趣的问题。
The paper concludes in its last part by mentioning the experimental methods in the study of propagation of nonlinear ultrasonic waves in solids and some problems of current interest.
提出了一种利用空气中超声波非线性传播效应制作的、可产生高指向性可听声的新型声束扬声器。
A novel audio beam loudspeaker which based on nonlinear propagation effects of ultrasonic in the air to generate audible sound with high directivity is presented.
一种新颖的声束扬声器是捏造的利用超声波在空气中的非线性传播效应，产生声音的高指向性的声音。
A novel audio beam loudspeaker is fabricated by utilizing the nonlinear propagation effects of ultrasonic in the air to generate audible high directivity sound.
在光的非线性传播过程中，增加泵浦光的强度及光和物质的互作用长度是获得较高的频率转换效率的主要途径。
In nonlinear optical frequency conversion process, it is desirable to maximize the product of the intensity of pump laser and the interaction length in order to achieve maximum conversion efficiency.
通过对向上传播的重力波波包在中层大气中的非线性传播过程进行数值模拟，讨论中层大气中重力波的饱和机制。
Saturation mechanism of gravity waves in mesosphere is discussed by simulating the nonlinear upward propagation of gravity wave in mesosphere.
“旋磁材料中的非线性电磁波”主要研究电磁波与旋磁介质相互作用中出现的各种非线性传播特性以及应用途径。
The study of electromagnetic waves in nonlinear gyromagnetic materials is mainly focused on the properties and potential applications of nonlinear waves.
“旋磁材料中的非线性电磁波”主要研究电磁波与旋磁介质相互作用中出现的各种非线性传播特性以及应用途径。
The study of electromagnetic waves in nonlinear gyromagnetic materials is mainly focused on the properties and potential applications of nonlinear waves.
应用推荐