对阿基米德螺旋线调制斩波器的曝光效率进行了理论分析和数值模拟，得到斩波器曝光效率对后续信号处理的影响。
The Archimedes spiral cord modulating chopper's exposure efficiency was theoretically analyzed and numerical simulated, and its impact on the following signal processing was obtained.
在建立舰船辐射噪声仿真模型的基础上，推导了单、双螺旋桨舰船辐射噪声调制谱谐波族幅值特征的数学期望表达式。
On the basis of building the ship radiated-noise model, the mathematical expectation expressions of ship radiated-noise demodulation spectrum harmonic clan feature were educed.
利用扩展的三变量布鲁塞尔模型，得到了新的时空斑图，其中包括振荡四边形斑图、调制条纹斑图以及螺旋波斑图。
New spatiotemporal patterns including oscillating square pattern, modulated stripe pattern and spiral pattern have been found in a three-variable Brusselator model.
首先讨论了舰船辐射噪声的产生机理、构成和频率特性，指出螺旋桨噪声的振幅存在周期性调制。
First, the generation mechanism, components and frequency characteristic of radiated noise of naval ships are studied. There exists periodical modulation for the amplitude of propeller noise.
通过试验分析了螺旋桨子回波的调制作用，并研究了螺旋桨子回波的影响大小，分析了影响大小与各种因素的关系。
Trough experiments the modulation effect of propeller echoes, its influence, the relationship between its influence and other factors are analyzed.
通过试验分析了螺旋桨子回波的调制作用，并研究了螺旋桨子回波的影响大小，分析了影响大小与各种因素的关系。
Trough experiments the modulation effect of propeller echoes, its influence, the relationship between its influence and other factors are analyzed.
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