低频

To change the pick type, the cutting depth etc, so as to observe their influences on the deformation and destruction law of coal body; To adopt octagonal ring dynamometry made by ourselves and signals picking up system of multi-channel, low frequency and high-accuracy so as to monitor the cutting force in coal cutting course; To adopt the high-speed photography method, so as to shoot the cutting course and analyze the law of shaping.

改变截齿类型、截割深度等，观察对煤体变形破坏的影响；采用自制的八角环测力仪和多通道低频高精度信号拾取系统对截齿截割煤体过程中的截割力进行了在线监测；采用高速摄影的办法拍摄截割过程，分析变形破坏的规律。

Analytical results indicate that AC magnetic field should be below the penetration magnetic field of superconducting tape and frequency of magnetic field should be low (200Hz)enough in order to reduce the influence of eddy current loss in metal matrix and coupling loss among superconducting filaments and the matrix.

在测量过程中交变磁场必须低于带材穿透磁场；磁场需要保持在低频（200Hz以下）以减少基材的涡流损耗和超导芯间的耦合损耗对测量损耗电压的影响。

Objective:To investigate the inhibiting effect of low-frequency electric magnetic field in different intensity and time on the proliferation of arterial smooth muscle cells.

目的：探讨不同场强、不同作用时间的低频电磁场对兔主动脉平滑肌细胞增殖的调控作用。

In this problem, the main difficulty is that the variation of border electric potential is not sensitive to the variation of conductivity in the field. So far, there is not an effective method to solve the problem.

在低频电流场逆问题的计算中，最大的问题在于边界电位值的变化对场域内部电导率的变化不敏感，到目前为此，对此问题还没有一个公认的有效的解决办法。

Others desynchronized with 5－90 Hz primary depth electrographic after-discharges;(2) primary electrographic after-discharges were driven by primary unit after-discharges in the anterior dorsal HPC;(3) primary unit after-discharges were induced by brief primary electrographic after-discharges; and (4) plasticity of primary electrographic after-discharges and inhibition of single neuron firing were induced by repetitive ATPDH.

非同步性后放电的深部电图癫痫样电活动具有宽频带特征(5－90 Hz)；(2)原发性单位后放-后抑制效应可以引发低频原发性电图后放电，长时程爆发式单位放电可以诱发高频原发性电图后放电；(3)短束原发性电图后放电也可以诱发原发性单位后放电；(4)原发性电图后放电和神经元单位放电的抑制效应具有明显可塑性特征。

In order to prevent low-frequency signal Scent of excessive weight loss, the general use of larger capacity electrolytic capacitor.

为了防止信号中韵低频分量损失过大，一般采用容量较大的电解电容。

With the development of technology, low-frequency electromagnetic radiation hazard to humans has been confirmed.

中文摘要随着科技的发展，低频电磁辐射对人体的危害已经被证实。

For the protection of human health, the low-frequency electromagnetic radiation measurements are important.

对低频电磁辐射的测量对于保护人类健康有重要的意义。

Chapter 1 outlines various kinds of numerical methods in electromagnetics, the history and developmental trend of edge finite element.

它被认为是继节点有限元之后一种富有生命力的方法，在电磁学的高频和低频领域都得到了广泛的应用。

The curative effect was compared with that in low requency electrotherapy group and magnetic force vibration heat group.

目的 观察低频穴位电刺激结合磁热治疗椎动脉型颈椎病的临床疗效。

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。