低频

Input voltage peak limited to 600V for DC and low frequency.

对直流和低频输入电压的峰值上限为600伏。

There is a peak of voltage noise driven by the current in the vortex glass state.

通过分析磁场激发产生的涡旋度 Ne 及低频电压噪声 S 0的变化特性，得到如下结论：在无序超导体中固定温度不变，随着磁场的减弱涡旋液态经过准有序的布拉格相，涡旋玻璃相重新进入到低磁场下的钉扎稀磁液相。

Based on the analysis of Sea Surface Height Anomaly from satellite observation, it is proved that the oscillation with period of 70～210 days is dominating in two branches of the eastward countercurrent in Subtropical North Pacific: Subtropical Countercurrent and Hawaiian Lee Countercurrent.

根据对卫星观测的海平面高度资料的分析，进一步证实了在北太平洋副热带两支向东的流（副热带逆流和夏威夷背风逆流）所在的区域内，海平面高度的70～210天周期振荡是主要的低频变化。

Spin detonation of cast charges TNT DINA and DNT PETN was studied.

本文研究了梯恩梯—吉纳和地恩梯—太安体系的自旋爆轰现象，爆轰波是以低频脉冲方式传播。

The present study consisted of two parts:Using an identity judgment task, Experiment 1 investigated into three-level Indonesian students pronunciation of phonogram characters with different familiarities.

本研究包括两部分：研究一采用语音同一性判断作业，旨在考察不同水平的印尼学生在认知高频、低频形声字时是否具有声旁规则性效应。

The inention relates to a radio wave absorber which can achieve low cost, a small transportation volume, an excellent radio wave absorbing characteristic from a low frequency to a high frequency with a short length, a small or no difference in the characteristic of a polarization plane, and can be easily fabricated and worked.

本发明涉及一种电波吸收件、电波吸收体及其制造方法、以及电波暗室，用于实现下述的电波吸收体，其成本低、输送体积小、长度短、从低频到高频能获得良好的电波吸收特性，没有极化面特性差或该极化面特性差较小、重量轻、结构强度高、制造和施工容易。

A revised plane wave expansion method for calculating the band structure of photonic crystals is presented.

采用一种改进的平面波展开法，运用一种有效的设计二维各向异性光子晶体的方法，在低频和高频区域内获得了具有较大禁带的两种二维光子晶体。

And thus,the wavelet analysis has developed due to this demand, This thesis is to detect the point of signal discontinuity by wavelet transform.

小波分析正是由于这种需求而发展起来的通过小波变换来精确地检测信号发生变化的时刻，构造一个信号模型，由一个低频正弦波信号连接一个高频正弦波信号，利用小波工具可以检测出信号发生不连续的间断点的位置。

Based on the principle of PEC, surface cracks mainly affect the high frequency components and subsurface crack mainly affect the low frequency components, so the PEC signals can be analyzed in frequency domain, which can eliminate the influence of noises during measurement. A method of frequency spectrum separating point is proposed for flaw classification, which enhances the accuracy in classification of defects. The agreement between theory and experiment shows that the present method is valid and applicable.

通过对脉冲涡流的理论分析发现，表面裂纹主要影响脉冲频谱中的高频成分，而表面下裂纹主要影响脉冲频谱中的低频成分，因此可以将时域中易受噪声影响的脉冲涡流信号变换到频域分析，提出了"频谱分离点"的方法来对裂纹进行分类识别，提高了缺陷分类识别的正确率，理论分析和实验结果相一致，证明了该方法的正确性和有效性。

Since the output signal from fringing field dielectrometry sensors under a low frequency driving voltage are very low, the shield-drive, signal buffer and band-pass filter are adopted to improve SNR. With the signal gain and phase angle from a transform circuit, the complex permittivity of pressboard are obtained.

鉴于边缘场电容式传感器在低频正弦驱动信号作用下输出的感应信号非常微弱，调理电路采用驱动屏蔽方式进行测量信号缓冲，用带阻滤波器提高信噪比，并利用相应的变换电路求出电容系统的相位角和幅值增益，从而得到绝缘纸板的复介电常数。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。