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- FFTs only convert amplitude versus time data into frequency data. FFT只是把振幅时间关系转换为频率关系。
- Bollerslev and Engle have some works on high frequency data. 请问这个算是高频数据的问题么？
- It is possible that the computer is of low grade, and the time frequency is too low, please change for a new computer. 有可能是主机档次太低,时钟频率过低,请更换主机。
- Factor analysis methodology was applied to the data matrix gathered from users' opinions on a restricted sample of social science DB thesauri. 我们应用因素分析法来分析社会科学数据库中严格抽样出来的用户观点数据矩阵。
- This paper proposes a new method based on time frequency analysis to detect spikes automatically. 本研究提出了一种基于时频分析的癫痫脑电棘波检测方法。
- A dynamic adjusting method is presented when some additional information in the high frequency data is available. 文中提出了高频序列有补充信息时对低频预测结果的动态调整方法 .
- Unlike low frequency data,high frequency data has the calendar effects and long memory volatility. 与低频数据不同,高频数据通常具有“日历效应”和波动长记忆性。
- Secondly, to the nonstationarity of diesel engine noise, this paper focuses on the extraction of time frequency feature using wavelet scalogram. 其次针对噪声信号的非平稳性，研究基于小波尺度谱噪声分量的时频特征分析。
- M. Akay, "Time Frequency and Wavelets in Biomedical Signal Processing," Endorsed by IEEE Engineering in Medicine and Biology Society, pp.211-420, 1998. 翁国正，“应用小波系数临界法于消除助听器背景噪音之技术”，国立成功大学电机工程学系硕士论文，民国九十二年。
- By defining a new data matrix the coefficient matrix and the dexter item of the data domain normal equation can be determined jointly, thus higher computing efficiency can be attained. 通过定义新的数据矩阵,算法还可以合并求解数据域正规方程中的系数矩阵和右侧向量,从而提高了计算效率。
- Taking Time Frequency Distribution (TFD) of the radar signal as an image, the method uses image processing algorithm for extracting its singular value. 该方法把雷达信号的时频分布作为一幅图像进行处理，利用图像处理算法提取其奇异值特征。
- After testing on weekday affect using the high frequency data, it is found that in Monday the return volatility of china stock market is the highest. 用五分钟高频数据对我国股市的周末效应进行检验后，发现我国股市在周一的收益波动率最大。
- As planetary healers, we must become aware of the galactic time frequency and learn how to use the natural harmonics of time to our advantage. 身为行星的治疗者，我们必须意识星际时间频率，学习如何使用自然和谐的时间，成为我们的优势。
- A novel fault diagnostic strategy based on time-varying dynamic PCA model has been presented, which makes use of continuous updating time-lagged data matrix to construct a changeable PCA model to fulfill the task of fault detection and identification. 摘要提出利用不断更新的时滞数据矩阵建立变化的动态主元模型对某些动态系统内的传感器故障进行检测，利用变量贡献图的样本平均对故障进行识别的方法。
- It shows that since 1999 the seismic activity mainly belongs to the tectonic event based on a seismic spectral and time frequency analysis. 火山地震的频谱分析和时频分析结果表明，自1999年以来发生的火山地震主要为构造型火山地震。
- The application of my CPPLL is deserializer in video system, sampling high frequency data by low frequency clock to generate parallel low frequency data output. 通过对时钟的频率和相位的同步，多相位输出，来对高速串行数据进行解串，输出低速并行信号。
- The time frequency analysis remedies the defect that short Fourier translation (SFT) has the same time resolution and frequency resolution to different frequency ranges. 该方法克服了SFT（短时Fourier变换）分析对高、低频段具有相同的时间分辨率和频率分辨率的缺点，弥补了小波变换只能粗糙地模拟基底膜带通滤波器特性的不足。
- The experimental encryption data is the lowfrequency air zone video signal, the carrier signal is the H.263compression main engine video frequency data. 实验的加密数据是低频空域视频信号，载体信号是H.;263压缩主机视频数据。
- Using computer simulation, the results show that fluctuating wind synthesis with time frequency nonstationarity can reflect normal characteristic of fluctuating wind. 通过计算机仿真分析，结果表明小波重构合成的脉动风具有良好的时频非平稳性，能够反映脉动风特性；
- Combined with the basic principle and method of the radar multitarget resolving,the application of time frequency analysis is discussed for nonrigid multitarget resolving. 从雷达多目标分辨的基本原理和方法出发,探讨了时频分析在雷达非刚性多目标分辨中的应用问题。
