窄带

The Doppler frequency shift and the Doppler broadening are comprehensively utilized, the narrow-band phase plate is inserted between a collimating mirror and a focusing lens of an imaging probe, thereby implementing the spatial encoding of the Doppler information, realizing the imaging requirements on the spatial high-resolution three-dimensional speed vector, combining with the Doppler OCT method which is based on the phase resolution technology to meet the high-speed and high-sensitivity measurement requirements and finally realizing the speed vector imaging with high-resolution, high-speed, high-sensitivity and large-imaging range of the three-dimensional flow field of the microfluidic chip.

综合利用多普勒频移和多普勒展宽，并在成像探头的准直镜和聚焦透镜之间插入窄带相位片，实施多普勒信息的空间编码，实现空间高分辨三维速度矢量的成像要求，再结合基于相位分辨技术的多普勒OCT方法则能够满足高速度高灵敏度的测量要求，最终实现对微流控芯片立体流场的高分辨率、高速度、高灵敏度、大成像范围的速度矢量成像。

The algorithm produces optimal weight by combining wideband with narrowband weight on the premise of accurate DOA estimation.

该算法在已精确估计出信号和干扰方向的前提下，把窄带权和宽带权相结合形成最优权。

On the other hand, when the optical filter detunes from the laser wavelength a little, a narrow notch filter with flat passband is realized.

此结构通过调节可调谐窄带滤波器的中心波长可实现高Q与通带相对较平的陷波频率响应的切换。

Design and simulation results show that these two kinds of 3 dB-couplers are consistent with general requirements of parameter indexes, and can be respectively suitable for narrowband and broadband in the adjacent-channel duplexers.

设计和仿真结果表明，这两种结构的三分贝耦合器符合一般的指标要求，分别适用于窄带和宽带的数字邻频双工器中。

According to the requirements of 3 dB-coupler in adjacent-channel duplexers and the basic principles of 3 dB-coupler, a narrow band 3 dB-coupler is analyzed which can applied to digital TV field.

根据数字邻频双工器中对三分贝耦合器的要求和三分贝耦合器的基本原理，对应用于数字电视领域的一款窄带三分贝耦合器进行了分析。

After all, an OAA style experimental set-up in a single expansion chamber silencer for engine exhaust noise control was developed. Three kinds of software for the AANC system, the AANC system combined with the ALE, and the AANC system combined with the proportional tuned PDC were programmed.

结果表明：该系统在部分消除了影响次级通道建模精度的宽带干扰噪声的同时，充分发挥了前向窄带控制系统的作用，提高了次级通道建模精度，系统稳定性及消声性能得到提高。

The 1500V DC feeder cable is one of the key devices for the safety operation of subway system, and its insulation status directly affects the security of electricity supply of rail traffic.

为解决地铁直流电缆电气接线的特殊性而导致其放电检测中存在的大量干扰信号，实验研究了整流装置产生的整流脉冲、机车启动制动产生的电流脉冲、随机性脉冲信号及其它电子设备产生的窄带信号等干扰信号的特征。

The results of study showed that there were many interference signals in discharge detection signal for the DC feeder cable, which determined by the special electric wiring of the cable. The results of laboratory simulation and field measurement showed that the main interferences involved discharge pulse generated by other equipments of the traction substation, white noise, rectifying pulse generated by the rectifying equipments, current pulse generated by the braking of the locomotive,stochastic pulse signal, and narrow-band signal generated by electric equipment.

研究结果表明直流馈出电缆的电气接线以及负荷特点决定了其放电监测中存在大量的干扰信号，干扰信号包括白噪声、交流侧放电脉冲、直流侧其它设备的放电脉冲、整流装置产生的整流脉冲、机车启动制动产生的电流脉冲、随机性干扰脉冲以及其它电子设备产生的周期性窄带信号。

High-arched feet: imprint has a very narrow band connecting forefoot and heel.

高足弓脚：连接前脚和脚跟的印记是一个窄带。

And a excellent narrow-band filter will be produced with a low-pass and a high-pass filter at the passband congruence.

采用一个低通滤波器和高通滤波器在其通带叠合处便可产生一个优良的窄带滤波器。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。