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- According to the linear time frequency transform characteristic of the short-time Fourier transform,the time frequency theory is applied to the vibration analysis of the large hydroelectric machine. 以实际工程中的水轮发电机组为例,应用短时傅立叶变换分析机组的振动信号,结果图清晰直观地表现了机组的振动情况,为水轮发电机组的故障诊断提供了理论和现实依据。
- time frequency transform 时频变换
- 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。
- 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。
- This paper detailedly introduces the master circuit of the frequency transformation speed regulation, IPM, and interface circuit with DSP. 文中对变频部分的主电路、智能功率模块IPM和dsp芯片及其周围接口电路都作了详细地介绍。
- 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。
- The high voltage variable frequency transformation of power plant's pump system of condensation water pump, condensation water booster pump is described briefly. 对发电厂的凝泵、凝升泵的高压变频改造进行了简要叙述,并对经济性试验的数据进行了定量分析。
- 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。
- 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。
- 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。
- 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。
- Application of PLC and Frequency Transformer to TV Studio Technology. PLC以及变频器在电视演播工艺中的应用。
- 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。
- 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。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久,就会发酵。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- "Litz" wires are multiple magnet wires bundled together for use typically when winding high frequency transformers. 绞合线是将若干漆包线捆束一起使用,特别用于缠绕高频变压器。
- I think the work can be completed ahead of time. 我认为这项工作能提前完成。
- He will come on time even though it rains. 即使下雨,他还是会准时来的。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries