周期性调制 meaning in English

periodic modulation

The propagation and control of soliton in nonlinear kerr optical lattice with harmonic modulation of refractive index are investigated analytically and numerically in this paper . and some innovative research results have been worked out . the forming conditions of lattice soliton from gauss beam and the two modes of its stable propagation are obtained for the first time
本文利用解析和数值方法研究了在具有横向折射率周期性调制的克尔型非线性光学格子中孤子的传输和控制,做出了一些创新性的研究结果:首次得出了高斯光束形成格子孤子的条件和两种稳定传输形式。
With the noise being added to a proper value , the system will show shochastic resonance and enhance the output signal . the sr technology is better than the traditionary signal detecting method . the best virtue of it is using the noise to enhance the capability of detecting the weak signal . and it will not harm the signal at the same time
随机共振系统是一个非线性系统，在一个小的周期性调制信号作用下同时输入噪声和信号，当噪声增强到某一强度的时候，信噪比不仅不会降低，相反系统会产生随机共振从而使输出信号得到显著的增强。