In Sect. 4.3.4 we show that the Dirac operator in an external field has the same essential spectrum as the free Dirac operator provided the potential vanishes at infinity.
在4.3.4节，我们证明了狄拉克算子在外场中有着对应着无穷远处时零势能极限的自由狄拉克算子的相同的本质谱。
The essential theory, Raman gain spectrum, gain characteristics, the configuration and pump sources of the FRA are analyzed.
研究FRA的基本原理，喇曼增益谱，增益特性和结构模型，介绍FRA的泵浦源；
The essential difference is that the spectrum analyzer, being designed for laboratory use, is designed to cover an extremely wide frequency range with widely adjustable tuning range, bandwidth, etc.
区别在于频谱分析仪被设计成是实验室使用，设计成是带有很大可调范围和带宽等并覆盖非常大频率范围的仪器。
It was found that the neutron scattering influence on the fission neutron spectrum is rather essential and can noticeably change the shape of the fission neutron spectra.
结果表明，中子散射对裂变中子谱的影响是相当重要的，它能明显地改变裂变中子谱的形状。
These results have been provided the essential data for programme fatigue testing and optimal design spectrum and static strength proof.
为室内程序疲劳试验谱、有限寿命设计谱和静强度校核提供了可靠的依据。
The selection of control channel in cognitive radio is essential because the control channel has to coordinate all the secondary users via spectrum holes.
因认知无线电通过频谱空洞作为控制信道并且控制信道承担传输全部从用户控制信息，所以控制信道的选择处于重要地位。
The philosophical four essential factor of abnormal mind is spectrum and type, nature and degree of abnormal mind.
异常心理的哲学四要素主要指异常心理的谱与类、质与度。
In the system of spread-spectrum communication, the essential point of demodulating information is to ensure the synchronism of local PN sequence and PN sequence of received signals.
扩频通信系统中，保证本地产生的PN序列与接收信号中的PN序列完全同步，是正确解调信息的关键点。
In spread-spectrum communication systems, the essential task which has to be performed is the synchronization of receiver pseudonoise (PN) signal with the pseudonoise signal contained in the input.
扩谱通信中一个最基本的任务就是实现本机的伪随机信号与接收的伪随机信号的同步。
Correct noise power spectrum estimation and apriori signal-to-noise ratio (SNR) estimation are all essential to good quality of the enhanced speech.
噪声功率谱估计和先验信噪比估计的准确性有助于提高增强后的语音质量。
Effective water suppression, a good phase and the smooth baseline of the spectrum is essential to the follow-up statistical treatment in metabonomics.
有效的水峰抑制、良好的谱图相位和平整的基线对代谢组学的后续统计处理至关重要。
Effective water suppression, a good phase and the smooth baseline of the spectrum is essential to the follow-up statistical treatment in metabonomics.
有效的水峰抑制、良好的谱图相位和平整的基线对代谢组学的后续统计处理至关重要。
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