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1 ?功率谱 ...en 关键词】: 位场,高阶导数,功率谱,岩层,埋深 [gap=709]Keywords】: Potential field,High order derivatives,Power spectra,Rock stratum,Depth ... 2 ?能量谱 春天须防猩红热猩红热和流脑流行过程的混沌分维研究 关键词能量谱，混沌相图，关联分维． [gap=1575]KEY WORDS chaotic phase space, correlation fractal dimension, power spectra. 3
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Recordings were analyzed for changes in EEG power spectra, power topography, and sleep-specific cortical oscillations. 分析EEG功谱、功率地形图和睡眠特异性的皮层共振活动。 - 2
Chaotic signal has the properties of ergodicity, nonperiodicity, continuous broadband power spectra, and noise like etc. 混沌信号具有遍历性、非周期、连续宽带频谱、似噪声的特性。 - 3
The noise power spectra of the non-contact detection system for LED chips and the noise suppression methods are discussed. 分析了LED芯片非接触检测系统噪声信号的功率谱，研究了噪声信号的抑制方法。
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