| 1. | Pseudo - speed tracking order analysis for non - stationary vibration signals of rotating machinery
旋转机械非稳定信号的伪转速跟踪阶比分析 |
| 2. | Fibre optic communication subsystem basic test procedures . part 2 - 5 : test procedures for digital systems . jitter transfer function measurement
光纤通信子系统基本试验程序.第2 - 5部分:数字系统的试验程序.不稳定信号传输功能测量 |
| 3. | Because of " self - adaptable " and " focus - adjustable " , wavelet analysis ( wa ) is called " mathematics microscope " and plays an important role in processing the non - stationary signal
而小波变换具有良好的“自适应性”和“变焦特性” ，被誉为“数学显微镜” ，在处理非稳定信号上有其特殊的地位和功能。 |
| 4. | How to extract the instantaneous parameters of the non - linear and non - stationary signals making use of the data analysis methods is the emphasis the thesis will discuss , as well as how to improve the method and apply it
如何利用数据分析方法提取非线性和非稳定信号的瞬时参数，并对该方法加以改善及应用是本文讨论的重点。 |
| 5. | The algorithm and application to unstationary signal analysis are distussed with wavelet transform in order to overcome defect of fourier transform only applied to stationary signal analysis on frequency domain . some comparisons are made between them
论文针对传统fourier变换只能在频域上对稳定信号进行分析的不足，探讨了利用小波变换进行非平稳信号分析的算法和应用，并在两者之间做了比较。 |
| 6. | Extracting instantaneous characters of the signals is very important in signal processing . but defining instantaneous parameters of complicated signals especially of the non - linear and non - stationary ones is difficult , measuring the parameters of them is even more difficult
信号瞬时特征的提取在信号处理中具有重要的意义，然而复杂信号特别是非线性和非稳定信号真正意义上瞬时参数的定义都比较困难，更谈不上高精度测量信号的瞬时参数。 |
| 7. | In this aticle , we reconstruct the signals of oil - watcr interface and inner pressure through mallat algorithin . the reconstruction ermr satisfies the system resollltion perfectly , which shows that the adaptability of wavelet transform in the analysis of unstable signals
文中利用mallat算法对油水界面信号和压力信号进行了小波重构，以表达式的形式将不规则的随机信号表示出来，重构误差满足系统要求，表明了小波变换在非稳定信号分析中的适用性。 |
| 8. | In vibration test , the signal is always along with noise . if the noise belongs to white noise , fourier transform is very suit to identify and process it , after then remove it . but when there exists low energy impact signal , traditional band pass filter remove noise and the precise position of impact signal is blured
对于白噪声，由于它是稳定信号，所以也可以使用fourier变换定位，以便在合适的频段进行提取。但是对于低能量突变瞬态信号，在信噪比比较低的情况下，由于带通滤波的平滑作用，瞬态信号的位置信息也变得很模糊了。 |
| 9. | Besides , it applies time - frequence analysis as a new signal processing tool to find right time - frequency algorithms and charateristic parameters used to enhance monitoring reliability . both in theory and in practice , this project is useful to develop medical instruments and study on automatic intraoperative monitoring
本文还应用时频分析这一新兴的非稳定信号处理工具寻找到适合术中监护的时频算法和临床实用的定量特征指标，并证明新的特征参数要比传统的监护指标更灵敏、更快捷，可以提高监护的可靠性。 |
