查询词典 narrow frequency

The very narrow EIT is obtained with large Rabi frequency.

当其Rabi频率很大时可获得很窄的电磁感应透明；当改变激发方式时，其Rabi频率的大小则直接影响捕获态的产生。

The cascade prerotation regulator was used in the blower for the hot-blast stove in The No.2 Ironmaking Plant of Jinan Steel to overcome the narrow range of frequency control of motor speed and not suitable adjustment in low speed area.

济钢第二炼铁厂热风炉风机应用叶栅预旋调节装置克服了变频调速范围窄、不宜用于低转速区调节的缺点，既满足了生产的需求，还节电30%左右，节能效果显著。

A process which is coupled to the narrow band of brain temperature could allow all normal human brains to be. affected by a subharmonic whose frequency range at about 10 Hz would only vary by 0. 1 Hz.

一个过程，它被链接到狭窄的大脑温度的波段，它能允许所有正常的大脑受到一个分谐波的影响，它的频率范围在大约10HZ，其仅仅由0.1Hz来改变。

The signal components of interest in the interference frequency are also sunk while eliminating narrow band interference in direct sequence spread spectrum system by conventional NBI suppression techniques based on the estimator/subtracter in time domain, so the signal of interest is damnified inevitably.

传统的基于时域估计/相减的直接序列扩频系统窄带干扰抑制技术在对干扰陷波的同时，也将干扰频率处的信号分量陷去，不可避免地对有用信号产生损伤。

The principle of partial discharge detection of gas insulation switchgear with ultra high frequency is discussed.A 220 kV GIS bus bar cavity is adopted as a test object to design and simulate four typical defect models in GIS.The PD signals produced by the four models are obtained via the PD detection system,which is developed by the authors on the basis of the narrow band UHF method.

为了提高GIS运行的可靠性，笔者简要说明了超高频法检测GIS局部放电的原理，并在实验室以一段220 kV电压等级的GIS母线为试验对象，设计和模拟了GIS中典型的4种局部放电模型，并使用自主研发的超高频窄带检测系统对其局部放电信号进行检测。

From the angle of a beam-forming, the cross- range focusing principle of the synthetic-aperture radar based on nonsinusoidal waves is studied. The expressions of antenna pattern for both rectangular signa l and Gaussian signal are presented. Compared with the conventional narrow bandw idth SAR whose cross-rang resolution is determined by the carrier frequency, th e cross-range resolution of the nonsinusoidal SAR is affected by the signal ban dwidth.

为研究非正弦波SAR的方位向分辨力，从波束形成的角度分析了非正弦波SAR的方位向聚焦原理，导出了基于矩形脉冲和高斯脉冲的合成孔径天线阵列方向图表达式，并与常规窄带SAR进行比较，指出影响非正弦波SAR方位向分辨力的主要因素为合成孔径长度和信号带宽，而与信号载频无关。

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。

To meet with the requirement of PECF finishing, pulse power source with high frequency, narrow pulse width and high current is designed.

为了满足螺旋锥齿轮等大型零件的脉冲电化学光整加工的要求，设计了高频、窄脉宽、大电流的脉冲电源。

High-cut and low-cut filters are available in the side chain to narrow the frequency range in which the gate should respond.

高切和低切滤波器可在侧链缩小的频率范围，其中门应对。

Time-frequency analysis method is an effective method of identifying the narrow-band interference in the wide-band spread spectrum signal.

时频分析是识别宽带扩频信号中窄带干扰的有效方法。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。