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- Then, Local Wave method is introduced in consideration of the non-stationarity characteristic of the vibrating signals from NC machines. 针对数控机床机械系统的非线性和振动信号的非平稳特性,引入局域波分析方法。
- Local wave method (LWM) could be effectively employed to suppress the interference of the cross-term encountered in processing the multi-component signals through WHOS method. 针对多分量信号Wigner高阶矩谱的交叉项会产生“虚假信号”,结合局域波法,提出了一种抑制WHOS交叉项的新方法。
- The conception of multi-scale Hilbert spectrum entropy(MSHSE)was proposed based on the multi scale analysis character of the local wave method(LWM)and its calculation method was developed. 基于局域波分析的时频多分辨特性,提出了多尺度Hilbert谱熵的概念,并给出了多尺度Hilbert谱熵的计算方法。
- Based on the local characteristics of signals, a local wave method (LWM) can be employed to obtain the instantaneous frequency of signals and the Hilbert time frequency spectrum composed of an energy time frequency three dimensional distribution. 局域波法是基于信号局部特征 ,通过该方法可得到信号的瞬时频率和构成能量 -时间 -频率三维分布的Hil bert时频谱。
- Firstly, tested signals are decomposed into number of intrinsic mode functions (IMFs) by using local wave method, and time-frequency spectrums of IMFs are acquired by means of Hilbert transformation. 首先使用局域波法将实测信号分解为多个基本模式分量,经过希尔伯特变换得到各分量的时频谱;
- Combining with the local wave method, image processing and CPN classification pattern, a new intelligent diagnosis method on fault information extraction was proposed in this paper. 结合局域波理论、图像处理技术和CPN网络模式分类器,提出了一种提取故障特征信息的智能诊断方法。
- Application of Local Wave Method in Rolling Bearing Fault Diagnosis 局域波法在滚动轴承故障诊断中的应用
- New method for processing end effect in local wave method 一种消除局域波法中边界效应的新方法
- Application of local wave method and higher-order statistics to valve-condition monitoring of reciprocating compressors 局域波法和高阶统计量在压缩机气阀状态监测中应用
- Applied Research of a Local Wave Method Used for the Monitoring of Multiple Faults in a Rotor System 局域波法在转子系统多故障监测中的应用研究
- Study on abnormal noise of low noise groove ball bearings based on local wave method 基于局域波分析法的低噪音球轴承异音研究
- Prospecting metal mine goafs by Rayleigh wave method is introduced. 介绍用瑞雷波法检测金属矿山采空区。
- A new method for analyzing nonstationary signal designated as local wave analysis is introduced. 该文介绍一种新的非平稳信号分析方法一局域波分析。
- local wave method 局域波法
- Therefore, local wave decomposition technology was introduced into the logging date extrapolation method constrained by time-phase model to gain the seismic instantaneous phase. 为此,在时间-相位模型约束的井资料外推方法中,引入局域波分解技术来求解地震瞬时相位;
- Therefore, local wave decomposition technology was introduced into the logging data extrapolation method constrained by time-phase model to gain the seismic instantaneous phase. 为此,在时间- 相位模型约束的井资料外推方法中,引入局域波分解技术来求解地震瞬时相位;
- By sweeping a laser along the pipe to change the local wave speed, physicists might be able to create a horizon. 将雷射沿著管路扫过,可以改变局部的波速,运用这种方式,物理学家也许可以创造出视界来。
- Minimum Detective Height and Height Measurement Accuracy Use Diffraction Wave Method to Detect a Crack Height. 衍射波法测定裂纹高度时的最小可测高度和高度测试精度。
- A M - band CMFB with a side lobe of about 45 dB was designed using the optimum equal wave method. 通过分析M带滤波器组和M带复用转换器的完全重构条件;用最优等波纹法设计了一个旁瓣约为45 dB的M带余弦调制滤波器组.
- The sound absorption coefficient of three kinds OSB wallboard were tested by the stationary wave method. 采用驻波管法测定了3种定向结构板(OSB)复合墙体的吸声系数;