低频

Climatologically , 30-60 LFO is more apparent in South China while 10-20 LFO is dominant in North China.

8从气候平均的角度分析，中国夏季降水的低频振荡在南方以30一60天振荡比较明显，尤其是长江中下游地区，而北方以10一20天振荡为主。

The high-frequency response characters of a simple-supported beam is obtained by NASTRAN.The result is strongly influenced by the mesh size.The comparison based on FEM,SEA and the closed form solution reveals the effectiveness of SEA in the prediction of high-frequency response.

利用NASTRAN软件得到一简支梁从低频到高频的频响特性，研究了不同有限元网格划分对结构高频特性的影响，并通过SEA法、有法元法以及解析解的对比揭示了SEA法在高频响应预示中的有效性。

While embedding watermarking, the watermarking sequences are produced by the chaos system,and are embedded into the low frequent coefficient of DWT domain to guarantee the robustness of watermarking.

该技术在水印嵌入时，由混沌系统生成水印序列，并在离散小波变换的低频子带上嵌入水印，保证了水印的鲁棒性。

Besides, as to inpainting problem in wavelet domain, we introduce a new iterative model. In this model low frequency and high frequency will carry on processing separately, enormous speed up the image repair convergence rate, and even if as high as 90% wavelet coefficient have been lost, this model will also be able to have the very good repair effect. In the old model, to compute the curvature we have to transform the coefficients to the pixel domain, and then transform back to the coefficient domain for several times and this method can solve this problem and speed up the iterative convergence.

其次针对小波域中图像修复的问题，本文提出了一种新的小波域图像修复模型，该模型根据小波变换后系数相关性的特点，将低频和高频分别进行处理，极大的加快了图像修复的收敛速度，并且即使丢失高达90%的小波系数，该模型也会有很好的修复效果，有效的解决了传统的TV- Wavelet模型在计算图像的平均曲率WCURV时，需要反复进行小波分解与重构的计算，迭代速度慢的问题。

It is concluded by the comparison of the Power Spectrum Density Function estimated from design spectra that the spectral energies do not distribute uniformly within the frequency of engineering interest in Chinese codes. The remarkable spectral energies concentrate in the range of low and high frequency.

由各规范设计谱估计的功率谱密度函数的比较说明，我国某些抗震设计规范设计谱给出的设计地震动在工程感兴趣的频率范围内可能存在能量分布不均的问题，低频分量和高频分量与中等频率段相比相对显著。

Magnetotherapy - is a method of healing by alternating low-frequency and constant magnet field.

磁疗-是一种愈合交替的低频和不断的磁场。

By using of current continuity function and Poisson function, we have calculated the carrier injection characteristics under low frequency and small signal condition.

利用电流连续性方程和泊松方程计算了低频、小注入情况下，应变量子阱结构激光器的载流子注入特性。

It is especially suitable for smoothing treatment of cooling curve used for metallurgical site thermo-analysis.

提出了一种新的数字滤波方法，与平均值滤波和惯性滤波相比，能更加有效地滤除高频干扰，并使低频信号保真度也明显改善，尤其适合于炉前热分析实测冷却曲线的光滑处理。

The most effective method of damping the oscillation is to install power system stabilizer and direct current modulation. But PSS designed to a certain mode will produce bad effect to other modes.

抑制低频振荡最有效的方法是装设电力系统稳定器和直流附加控制器，但针对某一振荡模式而设计的PSS会对其它模式产生负作用而破坏系统稳定性。

Performance Analysis and Design of Cymbal Transducer with Low Frequency［J］.

低频钹式换能器的性能分析与设计［J］。

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。