In this paper, the reducer in the main drive system of the rolling mill has been diagnosed successfully by using vibration intensity method and frequency domain analysis method.
利用振动烈度和频域分析方法，对轧机主传动系统减速机进行了故障诊断。
Time frequency analysis method is used to analyze the time domain and frequency domain of seismic waves at the same time according to the principle of wavelet transformation.
时频分析方法是利用小波变换原理，从地震波的时间域和频率域同时对其作出分析。
The main analytical method of unsteady flow in pipelines includes frequency domain analysis and time domain analysis.
管道中非稳定流动的分析方法主要有频域法和时域法。
The current widely used methods of seismic response analysis for soil layers in engineering are equivalent linearization frequency domain method which is based on FFT and iterative method.
工程上广泛应用的现行土层地震反应分析方法即为借助快速傅里叶变换和迭代法的等效线性化频域方法。
A method, based on analysis of time domain and frequency domain, applied in dynamic balance of hydro-generator rotor is presented.
提出了一种基于时域分析和频域分析的动平衡方法，应用于水轮发电机转子的动平衡。
A method based on complex frequency domain analysis is presented for the simplification of the partial differential model of non compressible fluid transportation process.
通过复频域分析，从理论上提出了一种建立输送管内不可压缩流体动态传送简化模型的方法。
Based on modulation domain analysis, a frequency modulation parameter testing method is proposed.
基于调制域分析，设计了电子产品频率调制参数测试方法。
This article analyzes the plant electrical signal in time domain and frequency domain by using the statistical analysis method.
应用统计分析方法对植物电波信号进行了时域和频域上的分析。
In Chapter two, the frequency domain method of financial volatility analysis is studied.
第二章研究金融波动的频域分析方法。
Then the comprehensive evaluation and an optimum design method of active safety in the closed-loop system are provided by using the statistical analysis in frequency domain.
应用频域统计分析方法，提出闭环系统主动安全性的综合评价与优化设计方法。
Based on observed signals analysis and comparison in time - domain and frequency -domain, the method of distinguishing interfere signals and abnormal electromagnetic radiation signals is given.
基于对观测信号的时域、频域分析的比较，给出了干扰信号与异常电磁辐射信号的判别方法。
The proposed method can solve the interaction problem in the same way as the conventional frequency domain analysis does for a fixed-base structure.
本文方法在求解土结构相互作用问题时与基础固定时的动力响应频域分析方法一致，只需要调整地震动输入，就可得到问题的解答。
A fault diagnosis method based on frequency-domain kernel analysis in nonlinear circuit and neural network is presented.
提出一种基于非线性电路频域核分析和神经网络的故障诊断方法。
A rigid body parameters identification method based on muhi-reference least-squares frequency domain scheme (one of the operational modal analysis techniques) is presented.
介绍一种基于多参考点最小二乘频域法(一种工作模态法)的刚体参数识别方法。
Operational modal analysis method of bridge was built based on frequency domain and spatial domain decomposition.
利用频域-空间域分解法，建立桥梁运行模态识别方法。
Considering the integer-order systems analysis is happened only in positive frequency domain, this paper is concerned about the extended frequency analysis method for fractional-order control systems.
鉴于整数阶控制系统主要进行正频域分析，本文论述了分数阶控制系统的扩展频域方法。
The analysis method in frequency domain is adopted to treat the transversely isotropic multi-layered soils, and response of soil layers under the upward shear waves is obtained.
采用频域分析方法，对多层横观各向同性土层对垂直向上的入射剪切波的反应进行了分析。
Use relative signal processing method to pre-processing data, make time domain and frequency domain analysis, calculate the ride index and comfort, obtain relative results and export reports form.
应用信号处理相关处理方法对数据进行预处理，时域、频域分析，进行平稳性指标、舒适度计算，得出相关处理结果，输出报表。
This paper makes the comprehensive evaluation of the quality of pile foundation through time domain, frequency domain and entropy spectrum, in which spectrum analysis is a new method.
通过时域、频域、熵谱对桩基质量进行综合评价，熵谱是一种新的谱分析方法，并通过实例分析，说明了在评价桩基质量时熵谱的优点。
The relation between ratio of peaks and degree of defect is worked out, then a method of quantity analysis in frequency domain is proposed.
根据这一特征，得到小峰与大峰之比与缺陷程度之间的关系曲线，提出利用导纳曲线进行缺陷量化分析。
The laplace-transform method is only applicable to the frequency domain analysis for linear circuits.
拉普拉斯变换法只适用于线性电路的频域分析。
Research on harmonic analysis of arc furnace electric system based on frequency domain method.
电弧炉电气系统谐波分析的频域方法研究。
The advantage of this method is that it doesn't require locating accurately the end point of QRS wave of HRECG and overcomes low resolution of frequency-domain analysis.
并且克服了时域法要求对QRS 复合波的起点和终点准确定位不易的缺点，以及频域分析法频率分辨率不足的缺陷。
Based on the frequency domain feature, energy eigenvector of frequency domain is presented using wavelet packet analysis method, and the way of best tree is used to choose symptom.
分析了用小波包能量分析方法提取故障信号特征向量的方法，并改进算法解决了小波包分解中的混频现象，根据最佳分解树进行了特征选择。
The main research work includes analysis based on frequency domain sub-average energy interception method of damping identification method, and were tested and compared to the analysis;
本文的主要研究工作包括基于频域分析的分段截取平均能量法阻尼识别方法的研究，并进行了试验验证和比对分析；
Using time-frequency-and complex frequency domain analysis to find the complete response of the circuit from the different point, has the different physics meaning and calculating method.
电路的时域、频域和复频域三种分析法求解电路的完全响应，比较了三种分析法的物理意义和计算方法。
Based on the analysis, a new method to detect carrier frequency of FSK signal named time-domain joint and modern power spectrum estimation is put forward.
对电力远动通道FSK信号进行了时域和频域分析，在此基础上提出了一种新的FSK信号载波频率测量方法—时域拼接结合现代功率谱估计的方法。
The frequency domain analysis can take into account the characteristics of atmospheric turbulence, and the calculation is simple, so this method have been widely used.
频域分析法能全面考虑大气湍流的特性，且计算简便，因而得到了广泛的应用。
The time-frequency analysis method is widely applied to rolling bearing fault diagnosis due to it can simultaneously provide time and frequency domain information of a signal.
由于时频分析方法能同时提供振动信号的时域和频域信息，因而在滚动轴承故障诊断中应用最为广泛。
The time-frequency analysis method is widely applied to rolling bearing fault diagnosis due to it can simultaneously provide time and frequency domain information of a signal.
由于时频分析方法能同时提供振动信号的时域和频域信息，因而在滚动轴承故障诊断中应用最为广泛。
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