时频分析方法分为线性、二次型和自适应等多种方法，它们提供了在时频二维平面上，分析信号时变功率谱的有效手段。
The methods of time frequency analysis include linear, quadratic and adaptive methods. They provide effective tools for analyzing signal time varying spectrum in time frequency plane.
综合负荷模型中的非线性因素，对于负荷记录中连续功率谱的出现会有一定的贡献。
The nonlinear characteristics of synthetic static load models can contribute to the continuous power spectra of the load records.
利用高对比度液晶光阀（LCLV）对联合功率谱进行非线性处理，实现了实时非线性联合变换相关。
Utilizing a high contrast liquid crystal light valve (LCLV) to perform joint power spectrum nonlinear processing, real time nonlinear joint transform correlation is implemented.
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