1) Frequency entropy
频度熵
1.
The resultsshow that time entropy frequency entropy and strength entropy appear apparent change oflower entropy prior to earthquakes with magnitude Ms≥4.
结果表明，时间熵、频度熵和强度熵，在省内发生Ｍ＿ｓ≥４。
3) subband spectrum entropy
子带频谱熵
4) the entropy feature in frequency domain
频域熵特征
6) multiscale entropy
多尺度熵
1.
Based on sample entropy-a modified algorithm of approximate entropy,we introduce the defination, algorithm and application of multiscale entropy(MSE),which is applicable to the analysis for the complexity of physiologic signals.
介绍了在样本熵基础上提出的多尺度熵的概念、性质与应用,给出了一种计算多尺度熵的算法,并且通过实际算例说明了多尺度熵在表征信号复杂性方面的能力及其在心率变异信号研究中的初步应用。
2.
Firstly,multiscale entropy characteristics of several typical nonlinear series were studied,and then based on this,the fluctuant conductance signals of 144 two-phase flow conditions were analyzed,which were collected by using array conductance sensors in upward vertical gas-liquid two-phase flow.
研究了几种典型非线性时间序列的多尺度熵特征,在此基础上分析了由插入式阵列电导传感器采集的144种流动条件下的垂直上升气液两相流电导波动信号。
3.
The algorithm steps of multiscale entropy are given.
给出了多尺度熵的算法步骤,对生理信号中两种常见噪声白噪声和1/f噪声的多尺度熵进行了研究,分析表明1/f噪声有比白噪声更为复杂的结构,探讨了混沌信号logistic映射的多尺度熵特征,在此基础上对不同睡眠时期脑电信号的多尺度熵进行了比较,结果显示脑电信号具有复杂结构,醒期熵值最高,睡眠Ⅳ期熵值最低;睡眠Ⅰ期、睡眠Ⅱ期和醒期复杂度较高,变化趋势接近;睡眠Ⅲ期、睡眠Ⅳ期和快速眼动期变化趋势基本一致,2尺度后复杂度基本保持不变。
补充资料：频度
1.梵语音译。点。指有形物组成的最小部分。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条