超低频

用超低频脉冲磁场处理鼠S-180肉瘤细胞并进行光镜观察；应用计算机图像分析技术对细胞核参数进行分析。

Mices S180 sarcoma cells were exposed to an ultralow frequency pulsed magnetic field and observed with an optic microscope .

通过对高压交联聚乙烯绝缘电缆进行直流耐压、0.1Hz超低频耐压、工频谐振以及调频串联谐振耐压等试验方法的分析比较，指出直流耐压对交联聚乙烯电缆的危害；

The comparison made with the tests of high voltage cross linked polyethylene cable by DC voltage endurance , 0.1 Hz ultralow frequency voltage endurance , IF syntony and FM serial syntony voltage endurance indicates that DC voltage endurance test is detrimental to high voltage cross linked polyethylene insulated cable ;

用PC声卡采集超低频信号的方法

A Method of Acquiring Ultralow Frequency Signals Using PC Sound Card

利用FFT测量PVC的超低频介电频谱

Measurement of ultra low frequency dielectric spectroscopy with FFT

超低频RC振荡器振幅稳定性实验研究

Experimental Study of Amplitude Stabilization of An Ultra - Low Frequence RC Oscillator

采用电晕极化和超低频电场极化两种方法极化偏氟乙烯/三氟乙烯共聚物P（VDF/TrFE）73/27，发现制得的热释电探测器性能相似。

Ferroelectric thin films of vinylidene fluoride / trifluoroethylene copolymer P ( VDF / TrFE ) are polarized by corona and super-low frequency electric field .

采用FFT的超低频失真度测量

Distortion Measurement of Ultra Low Frequency Signal by Means of FFT Algorithm

基于DVD光读取头的超低频振动传感器机理的研究

The Research on Mechanism of Ultra-low Frequency Vibration Sensor Mechanism Based on DVD Pickup

在超低频和低频范围内，也就是低的磁场和电流扫描速度时，两种方法的结果相一致，Q随频率增加。

In super low frequency range , losses increased with the increasing d I / d t ( f ) in both methods .

含水树枝XLPE电缆的超低频谐波响应电流特性实验研究

Current characteristics of ultra-low frequency harmonic response in XLPE cable containing water treeing

介绍了由单摆改进而成的倒摆、折叠摆、X摆和锥摆等超低频水平隔振系统。

The inverted pendulum , folded pendulum , X pendulum and conical pendulum ultra-low frequency vibration isolation systems , which are developed from single pendulum , are introduced .

目的：研究超低频电磁场对硝普钠诱导的SD大鼠肋骨骨骺软骨细胞凋亡的影响。

Objective : To investigate the effects of extremely low-frequency ( ELF ) magnetic fields on SD rat chondrocytes apoptosis induced by sodium nitroprusside ( SNP ) .

FP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。

F P interferometer ( FPI ) is effect to examine the ultra low frequency .

在动模实验室对产生超低频振荡的原因，PSS对超低频振荡的抑制作用进行了实验验证。

The reasons that influence very low-frequency oscillation and the inhibiting effect of PSS were proved by experiment in the dynamic simulation laboratory .

倒摆、折叠摆、X摆和锥摆等超低频水平隔振系统实现了几十秒的共振周期；

Several ultra-low frequency horizontal vibration isolators , including the inverted pendulum system , the folded pendulum , the . X-pendulum , the conical pendulum , may have a resonant period of tens of seconds .

超低频（ULF）电磁辐射观测与资料处理方法

ULF electromagnetic radiation observation and data process methods

将运算放大器及其外接元件组成回转器，就能够模拟一只Q值极高的大电感，从而实现超低频振荡。

Using operational amplifiers with their external components to form a gyrator , it is possible to simulate a large value inductor with a very high Q factor and to realize ultra-low frequency oscillation .

橡塑电力电缆0.1Hz超低频耐压和tanδ的测试技术

0.1 Hz ultra-low frequency voltage-withstand testing and tan δ measuring techniques for rubber plastic cable

阐述SQUID的工作原理和噪声特性，分析其在超低频通信中的低温控制、环的正交性和混沌行为，为工程应用提供理论依据。

Then it presents the low temperature control techniques , the perpendicularity of the three loops and the chaos conduct of SQUID , which provides theoretical basis fort .

一种0～20Hz超低频信号发生器的设计与实现

The Design of 0 ~ 20Hz Low Frequency Signal Generator

本文对工作于超低频情况下的RC振荡器的振幅稳定性进行了实验研究，得出如何选择稳幅电路有关参数的若干结论。

In this papers it studied the factors that influenced RC oscillator ampli - tude stability at ultra-low frequencies with a typical circuit and got some conclusions experimentally about selection of parameters for the amplitude stabilization circuit .

针对目前用于绝对低频振动测量的传感器在测量超低频（1Hz以下）的绝对振动时，其输出信号完全被淹没的缺点，提出了一种基于光纤的超低频绝对振动速度传感器技术方案。

A fiber-optic velocity sensor which can be used for absolute vibration with ultra-low frequency was introduced .

再应用超低频滤波、16位A/D转换、CPU信号处理等技术，通过汇编程序软件进行数字滤波，可形成一个完整的高精度倾角测量系统。

The servo-accelerometer with flexible quarts , which is connected to a signal processor including the technology of extro-low frequency filtering , 16-bit A / D transformation and CPU controlled by a software , becomes a high accuracy intrument for inclination angle measurements .

0.1Hz超低频正弦波耐压试验技术及应用

The 0.1 Hz AC voltage withstand test and its application

其Cole-Cole图表明，得自于音频至微波段介电谱的Cole-Cole非德拜型弛豫规律，仍适用于超低频段。

It 's Cole-Cole plot shows that the Cole-Cole non-Debye dielectric relaxation law concluded from the results in sound to microwave frequencies is still valid in ultra-low frequencies .

通过在电极对拖曳天线电缆中附加磁场环天线可实现超低频（SLF）对潜通信的全向接收。

By means of attaching a H-field loop antenna to the cable of electrode-pair antenna , we can achieve omni-directional reception in the SLF communication to the submarine .

国内外0.1Hz超低频高压发生器

1 Hz HV Generator in China and Abroad

本文介绍了AD7731的功能特点、内部结构，给出了AD7731芯片在超低频接收机中的应用方案。

This paper introduces the function characteristics , internal construction of AD7731 , and gives an applied project in SLF receiver .

为了解决物体微小位移或微小振动的超低频高精度检测与装调间的矛盾，提出一种倒置差动式4f激光多普勒光栅检波系统。

To resolve the contradiction between the measurement of micro-displace or high-accuracy detecting of micro-vibration of ultra-low frequency and the convenience of building and adjusting , a inverted differential 4f grating demodulation system of laser Doppler is put forward .

本文通过都江堰电磁波ULF超低频观测仪震前接收到的电磁辐射信号，对观测场量的某些特征进行理论分析和估算。

This paper analyses and estimates some characters of the observed fields theoretically , according as the electromagnetic radiation signals received by Super Low Frequency ( ULF ) scopes in Dujiangyan City before the earthquakes occurred .