查询词典 resonance frequency

Companies such as stirring a net in April , 2008, giving degree , light preferential treatment summoning the matchmaker , joyful frequency of Pule becomes the people video frequency company of camp , license plate period of validity having no way with "the program licence spreading seeing and hearing to the information network" the first batches being 3 years.

2008年4月，激动网、优度、光线传媒、普乐欢频等公司成为第一批拿到《信息网络传播视听节目许可证》的民营视频公司，牌照有效期为三年。

Experiments show that the micromechanical tunable resonator has a resonant frequency of 4.8 kHz and a Q-factor of 500, and the tunable-range of resonant frequency is about 6.8% at the tuning voltage of 0-25 V.

梳状式可调变频率微共振器的Q值可达500，共振器共振频率约为4.8kHz，调变电压在0-25V时，可调变率达6.8%。

In the work, employing a function with four undetermined parameters to model the source wavelet, an analytical relation between Q-factor and envelope peak instantaneous frequency is derived from the theory of one-way waves propagating in an anelastic medium; at the same time, a method for extracting instantaneous frequency in wavelet domain is developed for improving the precision and anti-noise performance of IF estimation, and based on these, a method called EPIF in wavelet domain is proposed for estimating Q-factor of VSP data.

本文采用一个具有4个待定参数的函数去逼近震源子波，利用黏弹介质中单程波传播理论推导出了地震子波包络峰值处瞬时频率和品质因子之间的解析关系；同时，为提高瞬时频率的估计精度和抗噪性能，在小波域中发展了一种计算瞬时频率的方法，并在此基础上提出了估算VSP资料Q值的方法，简称小波域包络峰值处瞬时频率法。

The key problems of software radio and direct sequence spread spectrum range used in high range radio fuze are discussed. The effects of doppler frequency and carrier's initial random phase are analyzed. A new direct sequence spread spectrum algorithm based on software radio is proposed, by using differential encoding and quadrature demodulating, the effects of doppler frequency and carrier's initial phase on the output of inference filter are eliminated successfully.

研究了软件无线电和直接扩频测距技术在大炸高无线电引信应用中的关键技术问题，分析了由于多普勒效应引起的载波频偏以及载波随机相位对测距的影响，提出了一种基于软件无线电的直接序列扩频解调算法，通过采用差分编码和正交解调的方法，消除了多普勒频偏和载波随机相位对测距的影响。

Quadric time-frequency distribution can reveal the characteristic of signals by means of the combination of the features of time and frequency domains.

二次型时频分布可以从时域与频域特征相结合的途径揭示信号构成的本质。

During these processes, the system needs to meet the Lamb-Dicke limit, and the Rabi oscillation frequency should be far smaller than the phonon frequency.

在此过程中，系统需满足Lamb-Dicke极限，并要求光场的Rabi振荡频率远远小于离子的振动频率。

By studying the system's dynamic Rabi frequency,it has been found out that trapped population doesn't consist in the magnitude of the Rabi frequency,but in th...

通过对该体系动态Rabi频率的分析，得出：实现布居数囚禁的关键不在于具体Rabi频率的大小，而在于实现Rabi频率的适时跳转。

Is the radian frequency deviation from the center frequency.

是角频率与中心频率的偏离值。

W is the radian frequency deviation from the center frequency.

W 是角频率与中心频率的偏离值。

Radio spectrometer is important method and main instrument of radio astronomy research, through which we can research radio astronomy phenomenon in wide frequency spectrum and continuous time with high frequency resolution and high temporal resolution.

射电频谱仪是通过高的频率分辨率和高的时间分辨率，在广泛的频谱范围内和连续的时间演化上进行射电天文观测的仪器，它是射电天文研究的重要方法和主要工具。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。