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- fundamental frequency method 基频法
- Using Mallat algorithm on the basis of wavelet transform and multiresolution analysis(MRA) in connection with traditional FFT,a new speech signal fundamental frequency detection method is presented. 将基于小波变换与多分辨分析 (MRA)下的Mallat算法与传统的快速傅立叶变换(FFT)相结合 ,提出了一种新的语音信号的基音频率检测方法。
- The frequency associated with the first mode is sometimes called the fundamental frequency. 和第一振模相联系的频率有时叫做基频。
- The extinguish of arc of single-phase grounding fault is analyzed with high frequency theory and fundamental frequency theory. 本文分析了小电流接地系统弧光接地过电压的基本原理及高频熄弧理论和工频熄弧理论。
- Conclusion The results suggested the hypertrophic ventricular fold disturbed the phonation,making the fundamental frequency lower. 结论肥厚的室带可能参与发音，使基频和低音降低。
- This paper introduces the principle and tested results of measuring nodulizing grade by audio frequency method. 介绍了音频法检测铸件球化级别的原理及试验结果。
- Passing the square wave through a narrow bandpass filter centered on the square wave's fundamental frequency removes most of the harmonics. 通过一个中心位于方波基频的窄带带通滤波器，方波可以去除绝大多数谐波。
- Frequency method and Bayesian method are the two main data mining algorithms used in pharmacovigilance nowadays. 目前各国普遍使用的数据挖掘方法主要有频数法与贝叶斯法。
- Use the Frequency Spectrum (FFT) display to measure the approximate value of the fundamental frequency of the wire on the Sonometer. 使用频谱（FFT）显示测量振动频率计上金属丝基频的近似值。
- At present,its main parameters are fundamental frequency,amplitude of vibration,perturbation(Jitter,Shimmer),noise spectrum(HNR,SNR,NNE),et al. 目前应用的主要参数有基频、振幅、微扰值(频率微扰、振幅微扰)、噪声谱(谐噪比、信噪比、标准化噪声能量)等。
- Trumpeters alter fundamental frequency by modifying the lip tension and by pressing the valves to change the effective length of the tubes. 小号手可以藉由改变双唇的张力来增减基频，按下与放开活门则可以改变有效管长。
- Abstract : The two frequency method for measurring corrosion reaction resistance based on a. c. impedance and numerical integration has been proposed. 摘要 ： 提出了基于交流阻抗和数值积分原理的二点频率法。
- First,it is required that the calculation of RMS of fundamental frequency component is not only accurate,but also real time. 针对电能质量指标中电压波动和闪变的计算问题,提出了一种基波有效值的快速算法。
- The results show that anomaly frequency method is effective for the analysis of high frequency information characteristics in digital subsurface fluid data. 结果表明，异常频次法是地下流体数字化资料高频信息特征分析及其应用的有效方法。
- The fundamental frequency and bass were lower in diseased group. The percentage of jitter increased and the percentage of fundamental frequency decreased with severity. 试验组的基频和低音明显降低 ,随室带肥厚程度的加重 ,微扰百分值的检出率有增高的倾向 ,而基频和低音频率则有下降的倾向。
- Based on the clump intensity index, regressive analysis method and zero frequency method, the spatial distribution pattern of Latori bicolor (Walker) larvae was studied. 应用聚集度指标法、回归分析法、零频率方法对两色绿刺蛾幼虫在毛竹林间的分布型进行测定。
- Results The fundamental frequency and bass were lower in diseased group. The percentage of jitter increased and the percentage of fundamental frequency decreased with severity. 结果试验组的基频和低音明显降低,随室带肥厚程度的加重,微扰百分值的检出率有增高的倾向,而基频和低音频率则有下降的倾向。
- The percentage of jitter increased and the percentage of fundamental frequency decreased with severity.Conclusion The results suggested the hypertrophic ventricular ... 结果试验组的基频和低音明显降低,随室带肥厚程度的加重,微扰百分值的检出率有增高的倾向,而基频和低音频率则有下降的倾向。
- First, a few improvements are made to the original model, e.g. the determination of MVF value and the estimation of fundamental frequency and harmonic parameter values. 我们首先改进了原本模型的分析步骤的缺点，如MVF值的决定及基频和谐波参数值的估计；
- Time-dependent characteristic frequency method we advance here combines ingeniously theabove two methods. 本文提出的时间特征频率分析法是时频分析法和时间谱分析法的有机结合和补充。
