以下为句子列表：
英文: In light of the limitation of Fast Fourier Transform (FFT) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the
中文: 摘要基于李家峡水电站双排机组振动的现场试验研究，并且针对传统频谱分析方法傅立叶变换(FFT)对于非平稳信号已力不从心这一缺陷，利用小波分析方法在时域和频域上同时具有良好的局部化性质，通过对开停机这一典型非平稳过程信号进行小波及小波包分析，将其分解到不同频带内，获取微弱信息和提取优势频率，并对其作振源分析，得出开停机初始时刻因水流不稳均出现强烈的振动现象，且低频段信号能量最大，开停机过程水流脉动压力和尾水涡带摆动是引起定子基础振动的主要原因。
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英文: In order to diagnose faults of rotating machinery on-line, spectrum analysis is used to analyze the information from fuselage vibrations of ten kinds of faults, the result indicates that there exist various fault information.
中文: 摘要为实现对旋转机械的在线故障诊断，对10类故障情况下的振动信号进行频谱分析。
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英文: Power spectrum analysis and statistical moment function on a range of scales revealed scaling qualities of the date from stock market.
中文: 摘要通过对幂谱和统计矩函数的分析，得出股票市场时间序列的无标度性。
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英文: Spectrum analysis is fundamentally important for additive synthesis because samples alone do not inform the spectral constituents of a sampled sound.
中文: 因为采样本身不能传达出一个采样声音的所有的频谱要素，所以频谱分析对加法合成是至关重要的。
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英文: Static analysis under dead weight and nozzle loads, modal analysis, and spectrum analysis under seismic loads were performed.
中文: 并对结构各使用限制条件下的应力进行组合和评定。
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