frequency spectrum

Ball Screw Frequency Spectrum Analysis and On-line Acceptance

滚珠丝杆副的频谱分析与在线验收

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Contrast of time-frequency characteristics of wave spectrum between Shanxi reservoir induced earthquake and tectonic earthquake

珊溪水库地震与构造地震波谱时-频特征的对比研究

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The application of frequency spectrum method to test the cable force

振动频谱法在索力测试中的应用

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The software consists of modules, including data processing and filter, real-time control and print, data storage, reading, data-analyzing, frequency spectrum analysis, network transmission server and client.

软件设计采用模块化，包括数据处理及滤波模块、信号实时模块与打印模块、数据存储模块、读取模块、数据分析模块、频谱分析模块、网络传输服务器模块、网络传输客户机模块等。

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The theory and experiment of remote sensing of atmospheric torrent external size by light beam vibration frequency spectrum

光束抖动频谱遥感大气湍流外尺度的理论与实验

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In chapter 3, three dimensions unsteady turbulent flow numerical simulation is used for tail tube of the Three Gorges Hydropower, and frequency spectrum analysis is made for pulsation pressure, therefore frequency and corresponding amplitude of pulsation pressure is concluded.

第三章对三峡水电站尾水管进行了三维非定常湍流模拟，并对脉动压力进行频谱分析，得出脉动压力的频率成分和相应的幅值。

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A filter whose transfer function is matched with the frequency spectrum function of input signal.

其传递函数与输入信号的频谱函数相匹配的一种滤波器.

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On the basis of historical records of maintenance and operation, abnormal vibration of DH air compressor was analyzed using frequency spectrum analysis method. It was found that the rust was washed off from interstage cooler into the flow passage of impeller to cause imbalance.

结合历次检修及运行记录，利用频谱分析方法对DH型空气压缩机的异常振动进行分析，判定出产生振动异常的原因为级间冷却器的锈蚀物冲刷至叶轮流道上造成不平衡。

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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Hilbert时频谱。

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In the end, the paper further discusses the situation in which frequency spectrum image produced by ideal comb function is filtered by narrow crack, so that the construction of optical image becomes more clearly and direct perception.

最后进一步讨论了理想梳状函数产生频谱图像被狭缝滤波的情况，使光学成像结构更加明显和直观。

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A bit of English Notes wavelet transform, used in calculating the frequency spectrum, suitable for beginners.

带点中文注释的小波变换, 计算频率谱用的, 适合初学者.

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There were no feeding arteries in the fundus, arborescent blood flow, and medium to high velocity arterial frequency spectrum.

基底部无肿瘤滋养动脉长入，无树枝状彩色血流及中高速度动脉频谱显示；

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The functions of signal analysis include the time field Statistics analysis, the time field mutual analyzing, the frequency spectrum analyzing, the relevant analysis, the transmission function analysis, the demodulating analysis, and the short Fourier transformation of the time and frequency field etc.

系统的信号分析功能包括时域统计分析、时域相关分析、频谱分析、相干分析、传递函数分析、解调分析以及时频分析中的短时傅立叶变换等。

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While this division of the frequency spectrum works , said Goldsmith, it's not infallible.

戈德史密斯表示,这种频谱划分方式尽管行之有效, 却并非尽善尽美.

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Study on Polarization Reconfigurable Multi-layers Microstrip Antenna Based on Finite-Difference Time-Domain Method ANALYSIS OF TIME-FREQUENCY CHARACTERISTICS OF WAVE SPECTRUM BETWEEN TECTONIC EARTHQUAKE AND MINE EARTHQUAKE

基于时域有限差分法的极化可重构多层微带天线的研究三峡重点监视区构造地震与矿震时频谱特征分析

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Conclusion: ① CDPI is superior to CDFI in detecting blood flow signal of HCC, the pulsatile blood flow frequency spectrum has certain significance on HCC diagnosis.

结论：①对HCC瘤体观察所获血流信息CDPI较CDFI敏感，PW探及搏动性血流频谱的检出具有确诊意义；

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Temporal Frequency Spectrum of Optical Images of Beam Wave Sources in a Turbulent Atmosphere

束状光波大气传输源象抖动时间频谱

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Analysis of time-frequency characteristics of wave spectrum between tectonic earthquake and mine earthquake

三峡重点监视区构造地震与矿震时频谱特征分析

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In this paper, the source of noise in automobile power steering pump ( APSP) is revealed on the basis of the analysis to the frequency spectrum of APSP.

根据汽车动力转向泵的频谱分析，揭示了汽车动力转向泵的噪声主要来源。

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The Frequency Spectrum Dsitribution and Time Propagation of Voltage and Current pulse on a Transmission Line.

传输线上脉波电压及电流之频谱分布及时域传播.

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The cost of carrying more energy is that the frequency spectrum is widened.

但该编码在提高信号能量的同时,展宽了频谱.

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However, in far-end crosstalk, its sub-channels exist still a lot of frequency spectrum overlapping and increase error-rate.

在远端串扰时，其各子信道仍然存在着较大的频谱重叠，使误码率增加。

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Through vibration frequency spectrum analysisof no-tillage seeder in field, its vibration characteristics were obtained.

通过对播种机的田间振动频谱分析, 得到了它的的振动特征.

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Study on Pulse Doppler Frequency Spectrum Parameter Changes During Left Ventricle Diastolic Period in Healthy People Over 50 Years Old

50岁以上正常人左室舒张期彩色多普勒血流频谱参数变化的研究

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Non-Periodical Time Function Consists of Time Harmonics with Continuous Frequency Spectrum.

非周期时变由连续频谱之弦波所构成.

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By analysis of frequency spectrum based on MATLAB platform, wavelet method in the application of cutting out a section of inputting earthquake wave was presented.

通过基于MATLAB的地震波频谱分析，说明了小波分析方法在拟动力试西安建筑科技大学博士学位论文验中地震波截取方面的应用；

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Based on the analysis of the sensor signal frequency spectrum is made with a SD 2380 instrument.

在分析该传感器信号的基础上,用SD2380动态分析仪作了频谱分析.

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Its circuit block diagram is given on the basis of frequency spectrum analysis.

在对输出结果频谱分析的基础上给出了电路原理框图.

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Practice shows that the application of frequency spectrum characteristics to the evaluation of IP anomalies caused by sulfide mineralized bodies ( chalcopyrite) and graphite-bearing dolomitic marble is effective.

实践证明，利用频率谱定性评价硫化物矿化体（黄铜矿）与含石墨白云质大理岩激电异常源取得较佳效果。

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Compared to the frequency spectrum of those samples, the piezoelectric resonance modes were recognized.

配合频谱识别出了对应的压电谐振的模式.

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