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超低频     
相关语句
  ultra-low frequency
     The Ultra-low Frequency Multi-waveform Generator Based on Interpolated DDFS by Single C8051F007
     应用C8051F007的单片插补DDFS超低频任意波形信号源
短句来源
     8802 ultra-low frequency phase standard generator
     8802超低频标准相位产生器
短句来源
     Design and Manufacture of a Large Size High Degree of Shielding Ultra - low Frequency Shielding Device
     大尺寸高屏蔽度超低频屏蔽装置的设计与制造
短句来源
     Study on Ultra-low Frequency Vibration Sensor
     超低频振动传感器的研究
短句来源
     Study on Vibration Sensor of Ultra-low Frequency
     超低频振动传感器的研究
短句来源
更多       
  ultra low frequency
     Study on Ultra Low Frequency Vibration Sensor by Using Magnetoelectric Speedometer
     用磁电式速度计实现超低频振动传感器的研究
短句来源
     F P interferometer (FPI) is effect to examine the ultra low frequency.
     F P干涉仪 (简称FPI)对工程上超低频微弱振动信号的测试 ,具有较好的效果 .
短句来源
     are analyzed. These anomaly variations affected by the ultra low frequency electromagnetic radiation occurred within 8.8-32.5 hours before earthquakes and lasted the time from 20 min to 75 min.
     这些异常变化受周期为10~30s的超低频电磁幅射调制,大地电位基值发生几个mV的短暂变化,异常持续时间为10~75min,其超前时间为8.8~32.5h
短句来源
     This paper "described the measurement of frequency response function (FRF) of this system and the average linearization method under random exciting condition.The paper also analysed the ultra low frequency characteristics of this vibration system and gave a relation between FRF curves of various exciting signal levels and average times,and the modal parameter identification results.
     本文介绍这种系统的频响函数测量和在随机激励下的平均线性化方法。 作者分析了这个振动系统的超低频特性,给出了在不同激励信号电平下测得的频响函数曲线和平均次数之间的关系以及模态参数辨识结果。
短句来源
     The Correlation Research of the Large Scale Ultra Low Frequency Air Spring Vibration Isolation Platform Electromagnetic Damping System
     大型超低频空气弹簧隔振平台电磁阻尼系统相关研究
短句来源
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  ultra-low-frequency
     Nafionce calibration departments do not also solve the problem to measure and calibrate ultra-low-frequency sig- nal(0.01Hz-10Hz)required usually in seismological department.
     从前我们一直未进行这项工作,国内计量部门也无法解决地震系统常用的超低频信号(0.01Hz—10Hz)的测量与校准问题。
短句来源
     These factors include the nonlinearity of suspension spring, the nonlinearity of damping force and the nonlinearity of driving force, etc, in which suspension spring and damping force are main factors that influence the distortion of ultra-low-frequency vibrator.
     影响振动台台面波形失真的因素有:乳胶管弹簧的非线性、阻尼力的非线性、驱动力的非线性等,其中,弹簧和阻尼力的非线性是影响振动台超低频失真度的主要因素。
短句来源
     Design of the Power Amplifier for Ultra-low-frequency Vibrator Calibration System
     用于超低频振动校准系统的低失真度功率放大器的设计
短句来源
     A Phase-Difference Measuring Method for Ultra-Low-Frequency Signals
     测量超低频信号相位差的一种方法
短句来源
     In chapter 5, the ultra-low-frequency vibration calibration system is developed.
     第五章具体实现了超低频振动校准系统。
短句来源
更多       
  very low frequency
     The Measurement of tanδ of XLPE/PE Cables at 0 1 Hz Very Low Frequency
     0.1Hz超低频下XLPE/PE电缆tanδ测量
短句来源
     Test of XLPE/PE Cables Using a Very Low Frequency Method
     用超低频方法进行XLPE/PE电缆试验
短句来源
     This paper introduces the principle and test technology of the tan δ test at 0 1 Hz very low frequency (VLF) voltage. This is a new method for XLPE/PE cables on site test. Using this method to measure tan δ , the cables overall defaults can be detected sensitively.
     介绍了 0 .1 Hz超低频电压试验的基本原理和测量技术 ,这是 XL PE/ PE电缆现场试验的一种新方法 ,用它测量电缆 tanδ可以敏感地检查电缆绝缘的整体缺陷。
短句来源
     Three test methods for detecting the insulation defect of the XLPE power cable line, i.e., 50Hz AC voltage, 0.1Hz very low frequency voltage (VLF) and oscillating wave voltage (OWV), are compared.
     通过对交链聚乙烯 (XL PE)电力电缆试品的工频、0 .1Hz超低频和振荡波 3种击穿电压的平行比对试验研究 ,探讨能够有效发现、判别 XL PE电力电缆运行故障隐患的试验方法。
短句来源
     The paper describes the advantages and the new development of 0.1Hz very low frequency voltage test on stator windings of HV electrical machine,at the same time,a very low frequency 0.1Hz voltage test equipment developed by authors is presented.
     本文阐述了高压电机定子绕组 0 .1Hz超低频试验的优点及其超低频试验技术最新发展情况 ; 并介绍了研制的 0 .1Hz超低频电压试验装置
短句来源
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  ultra-low frequency
Ultra-low frequency passive vertical vibration isolation system
      
An ultra-low frequency passive vertical vibration isolator is constructed by mounting a couple of additional masses on the crank-arms of the torsion spring.
      
The present observation frequency ranges are ultra-low frequency 0.01-20 Hz and point frequency from 103 to 104 Hz.
      
A simulating experiment study on the variations in ultra-low frequency (ULF) magnetic field and self-potential during rock cracking was carried out in a magnetic field-free space.
      
Rapid transitions and ultra-low frequency behaviour in a 40?kyr integration with a coupled climate model of intermediate complex
      
更多          
  ultra low frequency
Two times ln SDANN is a goodsurrogate for ln ultra low frequency power and can be compared with published cut points.
      
Ultra low frequency electromagnetic wave anomaly and its spectrum characteristics before earthquakes
      
Many observations and researches show that abundant and intense ultra low frequency (ULF) electromagnetic anomalies appeare before local earthquakes.
      
The near-field ultra low frequency (ULF) waves generated by P(t) give SES reciprocally proportional to the distance R.
      
A quantitative study of observations of the ionospheric signatures of magnetospheric ultra low frequency (ULF) waves by a high-latitude (geographic: 69.6°N 19.2°E) high-frequency Doppler sounder has been undertaken.
      
更多          
  ultra-low-frequency
Nonlinear propagation of ultra-low-frequency electromagnetic modes in a magnetized dusty plasma
      
A theoretical investigation has been made of nonlinear propagation of ultra-low-frequency electromagnetic waves in a magnetized two fluid (negatively charged dust and positively charged ion fluids) dusty plasma.
      
Ultra-low-frequency electrostatic and electromagnetic modes in self-gravitating magnetized dusty plasmas
      
A theoretical investigation has been made of ultra-low-frequency dust-electrostatic and dust-electromagnetic modes, propagating perpendicular to the external magnetic field, in a self-gravitating, warm, magnetized, two fluid dusty plasma system.
      
It has been shown that the effects of self-gravitational field and dust thermal pressure significantly modify the dispersion properties of these ultra-low-frequency dust-modes.
      
更多          
  very low frequency
In healthy individuals, the peak oxygen consumption closely correlated with the HR variability, the very low frequency component at TL, and physical capacity.
      
The total RR-interval spectrum power (800 ± 98 ms2) in the TGs of the native population is shifted to the very low frequency band (VLF, 52%), which indicates predomination of the humoral-metabolic HR regulation level.
      
Exploration of the extension of two lava tubes, faults and dikes using very low frequency-electromagnetic technique in NE Jordan
      
The very low frequency-electromagnetic (VLF-EM) technique was used to delineate two sub-parallel lava tubes, faults and dikes in Umm El-Quttein area, NE Jordan.
      
The following time domain measures and spectral components were calculated: mean RR, SDNN, SDANN, RMSSD, SDNN index, pNN50, and very low frequency (VLF), low frequency (LF) and high frequency (HF) spectral components.
      
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