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- The proposed UWT effectively extracted the friction fault features of amplitude modulation and transient impact from vibration signal of a gearbox. 采用这种非抽样小波变换从齿轮箱的振动信号中有效提取幅值调制和瞬态冲击的摩擦故障特征。
- As it can reduce the dimensionality of data space and preserve the fault features, the algorithm greatly improve the performance of fault diagnosis. 该算法实现了数据降维和故障特征保留，有效地提高了故障诊断性能。
- The establishment of fault feature vector is a precondition to fault diagnosis. 电机故障特征相量的确立是进行故障诊断的前提。
- The study of fault location in distribution systems has being carried on for about ten years.Because of undistinguished fault features in single-phase-to-ground fault, it is being a knotty point. 小电流接地系统故障测距的研究历史不长，由于其单相接地故障特征不明显，一直被认为是一个难点，至今尚无成熟的应用。
- By using the characters and advantages of wavelet transform with MRA and local time-frequency domain, the feature parameter group which reflecting gear fault features is built. 摘要运用小波变换的多分辨和时频局部化特性，建立故障徵兆的初始徵参数集合。
- To extract incipient fault feature of mechanical signal, a new method to construct wavelet according to the fault characteristics is presented. 摘要针对机械信号早期故障特徵的提取问题，提出了一种根据故障特徵波形的特点来构造相应小波的方法。
- The fault feature of reciprocating machinery is extracted by CWT in this thesis. 本文运用连续小波变换来提取往复机械故障信号的特征信息。
- Therefore, the incipient fault feature can not be extracted effectively through frequency spectrum analysis. 因此，直接采用频谱分析无法实现早期故障的特征提取。
- The paper introduces the fault feature and repair method at common unit of PABX, and the repair of HARRIS PABX is analyzed. 介绍了程控用户交换机的公共单元故障特点、维修方法,并对HARRIS交换机的故障实例进行分析。
- His smile predominated his features. 他的微笑是他的容貌的重要特色。
- Shi D F, Qu L S.Application of genetic algorithm to fault feature selection[J].Journal of Vibration, Measurement &Diagnosis,2000, 20(3):171-176. [2]史东锋;屈梁生.;遗传算法在故障特征选择中的应用研究[J]
- At this point your logic is at fault. 在这一点上你的推理是错误的。
- I can recall the men's features. 我回忆得起这个人的容貌。
- The grumpy man found fault with everything. 那个性情乖戾的人对什么事都要找岔。
- She has finely chiseled features. 她的五官轮廓分明。
- It was not our fault that we were late. 这次迟到不是我们的错。
- They charged the fault to my carelessness. 他们把这个过失归咎于我的疏忽。
- A rare smile lit up his stern features. 他那难得一见的微笑在他死板的脸上平添一些生气。
- In chapter 1, Firstly, fault feature extraction methods and their characteristics in FDD are introduced briefly, research progress, existing problems and application prospects on the fault signal processing with wavelet are stated in detail. 第一章概述了故障检测与诊断技术中故障特征提取方法的研究进展、存在问题及应用前景。
- By means of the wavelet analysis, non-steady signals are analyzed, the fault feature vectors of fault are successfully extracted and this effective method is employed to identify the fault pattern. 研究了小波分析在非平稳信号分析的实际应用，成功地通过小波分析提取故障信号的特征信息，为识别故障类型提供了有效的分析手段。
