低频

Lf you turn to the left, your trailer skids to the right.

低频您左转，您的拖车制动权。

Namely in high-frequency unit use gradually incisive time resolution and lower frequency resolution, in order to moves the near observation signal quickly to change the part; In low frequency partially has the higher frequency resolution and the lower time resolution, in order to moves the far observation signal slowly to change partially, the wavelet this kind of signal analysing expression characteristic to analyzes the non- steady signal is extremely effective, suits the transient state anomaly very much which smuggles in the survey normal signal and demonstrates its ingredient, therefore by reputation for analysis signal microscope.

即在高频部分使用逐渐尖锐的时间分辨率和较低的频率分辨率，以便移近观察信号的快变部分；在低频部分具有较高的频率分辨率和较低的时间分辨率，以便移远观察信号的慢变部分，小波这种信号分析表示特征对分析非平稳信号是非常有效的，很适合于探测正常信号中夹带的瞬态反常现象并且展示其成分，所以被誉为分析信号的显微镜。

The HD 650 are headphones with a "soul"- inspiring Sennheiser to endow them with luxuriously rich basses and pleasantly natural trebles.

650是这样一款耳机，她是sennheiser灵感的结晶，senheiser的灵感赋予了650更出色的低频以及更自然的音色。

The HD 650 are headphones with a "soul"- inspiring Sennheiser to endow them with luxuriously rich basses and pleasantly natural trebles.

650是这样一款耳机，她是sennheiser灵感的结晶，就是senheiser灵感赋予了650更出色的低频以及更自然的音色。

This leakage current detecting technique can be used to off line diagnose the water treeing situation in XLPE cable insulation.

本文研究发现，采用现场检测电缆在超低频电压下的非线性响应电流来判别XL

Based on the combination of two above, an active absorption control on floating raft system is proposed.

浮筏在低频减振方面存在较大不足，而这恰是主动减振的优势。

Note: is not the characteristics of low-frequency filter, but a band stop filter characteristics, taking into account the actual filter of the non-ideal.

注意：并不是低频滤波器的特性，而是一个带阻滤波器的特性，这是考虑到实际滤波器的非理想性。

Low-frequency instability in a single stage PFC converter is studied, which employs a cascade configuration of a boost converter and a forward converter.

研究了由Boost 变换器和Forward变换器级联构成的单级功率因数校正(power factor correction，PFC)变换器中的低频不稳定现象。

Coal mine hoist ; low frequency drive system ; intelligent

矿井提升机；低频拖动；智能控制

Based on low frequency drive system of the DPB550/150 Ⅱ type an intelligent control strategy applied to the speed control of AC mine hoist is described and a satisfactory control performance is obtained. Some problems, such as unsatisfactory control performance of AC coal mine hoist in deceleration and low speed drive period, and the difficulty of obtaining the constant deceleration during changing load, are solved.

以DPB－550／150－I型中国矿业大学低频拖动系统为基础，应用智能控制策略，实现了交流提升机的速度控制，得到了较好的恒减速控制性能，解决了矿井交流提升机在减速段和爬行段的速度控制性能较差以及在负载变动时，很难实现恒减速的问题。

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。