查询词典 ultra-high frequency

Fast Fourier transformation and autoregressive model estimation, are the most common methods used in the frequency domain analysis. The fluctuation in the highfrequency bands are mediated by parasympathetic control, whereas the fluctuation in the low frequency bands are mediated by both sympathetic and parasympathetic nervous systems. The origin of the fluctuation in the very low and ultra low frequency ranges are less obvious.

频域分析法一般是利用快速傅位叶转换或自动回规模型估计法，高频处的变异是由副交感神经系统调控，低频处的变异则是由副交感神经系统共同调控，至於极低频处与超低频处的变异，其原因尚待厘清。

Note that in the "viral" marketing campaign for the film, there were hints concerning the "Bloop" incident. Several times during the summer of 1997, the U.S. National Oceanic and Atmospheric Administration recorded an ultra-low frequency underwater sound using U.S. Navy "spy" sensors 3,000 miles apart.

应该注意到在该电影的"病毒性"市场营销里，有一些关于"杂音"事件的暗示。1997年夏天，美国国家海洋大气局使用美国海军"间谍"探测器记录下了一段3000英里外水下的超低频声音。

The graphs you show are measuring temporal variations in the geomagnetic field in the ULF (ultra-low frequency).

你显示的图表是量度磁场中的超低频的短暂变化。

Computer simulations reveal that among the 20:1 ultra-wide frequency range VSWR is small, antenna pattern doesn't split and the lognitudinal length is less than half of the traditional small angle LPDA.

计算机模拟结果表明：该天线在20：1的超宽频带内驻波比小、方向图不分裂，纵向长度比传统方法设计的LPDA缩短一半以上。

The digital control of ultra-audio-frequency serial resonant induction heating power supply is mainly researched in this paper.

本论文的研究内容主要是串联谐振式超音频感应加热电源的数字化控制技术。

In chapter 3, the mechanism of test table waveform distortion generated by factors of ultra-low-frequency standard vibrator is studies systematically.

第三章对超低频标准振动台的台面波形失真机理进行了系统全面的分析。

In chapter 3, the mechanism of test table waveform distortion generated by all factors in ultra-low frequency standard vibrator is studied systematically for the first time. First, the expression of suspension spring is obtained according to the experimental results.

首先阐述了振动传感器的特点及其校准方法，指出了建立超低频标准振动计量的迫切性和重要性；然后回顾了国内外标准振动计量技术的研究概况；接着指出了超低频标准振动计量存在的问题并指明了研究方向，另外，还对标准振动计量中的自动控制研究情况进行了回顾和评述；最后指出本论文研究的主要内容。

Then the creative research work on ultra-low frequency and large amplitude elcectromagnetic vibrator based on moving magnet is done, improving exciting signal at ultra-low frequency, and, the theoretic analysis and experiment model are studied. Thus, the reference for establishing ultra-low frequency standard vibrator in future is provided. In chapter 5, two control strategies for ultra-low frequency standard vibrator test table waveform are studied.

首先采用机械振动隔振理论，研究设计了机械低通滤波器来滤除噪声信号，并运用等效的小振级信号进行了实验研究，得出了有益的结论；然后为提高超低频时激振信号，作者创造性地提出了动铁型大位移的电动振动台结构，进行了理论分析和实验模型研究，为将来建立大位移的超低频标准振动台提供了参考。

Deeper into the forest, they find a cavelike bunker containing a mysterious Wraith electromagnetic generator that is emitting a modulated ultra-low-frequency pulse.

Sheppard等人进入密林深处，找到一个洞穴掩体，里面有一台神秘的Wraith电磁发生器，不停放射出某种超低频的脉冲。

In this paper, the dynamic characteristics of magnetoelectric vibration velocity transducer are analyzed based on the mechanical model and the method of dynamic characteristics improvement is presented to realize ultra-low frequency vibration measurement by means of the transducer.

以磁电式振动速度传感器的模型为基础，分析了传感器的动态性能，提出了一种利用现有磁电式振动速度传感器实现超低频振动测量的动态性能改进的软件补偿方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。