频带

The numerical computation results of the dispersion equation and the coupling impendence are carried out.

分析表明，介质层的加入虽然使慢波结构的耦合阻抗有所降低，但其在降低了电磁波的相速的同时展宽了慢波结构的频带。

Results show that the variation of the oceanic angular momentum can provide about 64% of the excitation energy in CWB with a dominant contribution of the oceanic bottom pressure, while the excitation energy provided by the atmospheric angular momenta AAM (NCEP/NCAR and AAM is about 23% and 214% in comparison with the observed one.

结果表明，在Chandler摆动频带内，海洋角动量变化提供的激发能量大约占观测激发的64%，其中洋底压力变化起主导作用；NCEP/NCAR（美国国家环境预测中心/国家大气研究中心）和JMA大气角动量变化提供的激发能量分别为观测激发的23%和214%。

The dispersion and interaction impedance of two kinds of helical slowwave structure with vane-loaded are measured by using nonresonant perturbation method in 4～18 GHz with Aglient 8510C vector network analyzer.

螺旋线行波管由于其具有高功率、高增益、高效率和宽频带的特点，在电子对抗和通讯等领域具有广泛的应用。

The influence on energy/power measurement due to nonuniformly sampling is analyzed and the energy relation of the nonuniformly sampled signal in time domain and frequency domain is deduced.

如果输入周期信号的各次谐波谱线和各寄生谱线均不产生重叠，则可利用本文提出的方法计算出各通道的取样时间偏差的估计值，并证明了周期信号在其占有频带内可保证各次谐波谱线和各寄生谱线不发生重叠。

The higher the Q, the bass band will become peaker and theQ facor of 0.7 is flat and balance.

Q值越高，低频带的峰值越厉害，而0.7的Q值是较平和平衡的。

Multiple frequency band antennas are pivotally connected to electronic devices such that coaxial connectors are not required.

多频带天线被枢轴连接到电子设备上以致不需要同轴连接头。

With the development and application of three-terminal devices, a millimeter-wave three-terminal device oscillator has some advantages over a two-terminal oscillator, for instance, operation frequency band, efficiency, stability and integrity. Especially, for PHEMT (pseudomorphic high electron-mobility transistors) oscillator and HBT (heterojunction biplor transistors) oscillator, there is lower noise and better integrity, operate in wider dynamic range and higher frequency band.

随着三端器件的发展，相对于毫米波二端器件振荡器而言，毫米波三端器件振荡器具有工作频带宽、效率高、工作稳定和集成度好等优点，特别是用PHEMT和HBT器件制作的振荡器，具有更低的噪声，更大的动态范围，更好的集成度，可以工作在更高的频段，所以固态器件毫米波振荡器已逐步向三端器件振荡器发展。

For the existing problem of Meddis'psychophysically faithful method for extracting pitches from concurrent speech signalsis, we present a new pitch extracting method, which uses close-loop adaptive frequencies picking block to pick out the possible frequencies group, selects the two potential pitches base on the frequencies group's pitches and the relation between their periodicity so as to improve the robustness of finding potential pitches.

针对Meddis建立的基于听觉心理生理的混叠语音基频提取算法存在的问题，提出了基于听觉心理生理的混叠语音基频提取新算法，由于采取了闭环自适应提取模块及相应的潜在基频确定方法，提高了搜索潜在基频的鲁棒性，又利用潜在基频重新划分频带；有效提高了基频提取精度。

In anFDD wireless system, the duplex spacing between uplink and downlink islarger than the coherence bandwidth of the mobile radio channel, thus theuplink and the downlink small-scale fading is uncorrelated. Moreover, thearray response is correlated with the frequency of the signal carrier. So it isimpossible to resue the uplink weights for downlink beamforming. As aresult, the application of smart antenna for the downlink is a difficult problem.

在频分双工系统中，由于上、下行载波的频率差大于相干频带，上、下行信道衰落是不相关的，而且阵列响应也与信号的载波频率有关，因此，上行信道不能直接用来估计下行信道，故智能天线应用于下行链路是一个难点。

Ricker wavelet whose predominant frequency is 200Hz was chosen as the exciting wave, and the character parameters (predominant amplitude, predominant frequency and frequency bandwidth) of its reflected wave were calculated.

选择主频为200Hz的雷克子波，理论计算原始地震反射波的特征参数（主振幅、主频率、频带宽度）。

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。