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频率转移     
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  frequency agility
     The other way is to implement automatic frequency agility under strong noise, based on the ranging and burst configuration mechanism of current DOCSIS protocol, meanwhile, guaranteeing CMTS's normal operating.
     另一个方向就是基于现在协议提供的抗噪声干扰的机制,充分挖掘测距机制和灵活的突发配置机制的抗干扰潜力,以不影响头端设备的正常运行为前提,以它们为基础实现能自动避开强噪声干扰的频率转移
短句来源
  frequency transition
     A Frequency Transition Function of Differential Frequency Hopping System
     一种差分跳频系统的频率转移函数
短句来源
     A novel frequency transition function (G-function) of shortwave DFH (differential frequency hopping) based on Xinpson cloud model is proposed. The FH pattern generated by the proposed G-function is simulated and analyzed.
     基于辛普森云模型,提出一种新的短波差分跳频(DFH)频率转移函数(G函数)算法,并对该G函数产生的跳频图案进行了数值仿真和分析。
短句来源
     The frequency transition function in DFH system is one of the key technologies and will influences the performance of the corresponding communication system considerably.
     频率转移函数是相关跳频的关键技术之一,将直接影响相关跳频通信系统的性能。
短句来源
     The turbo-DFH encoder consists of two frequency transition functions parrallely concatenated via a random interleaver. An iterative structure is adopted to decode the codes at the decoder.
     Turbo-DFH编码器由2个频率转移函数通过一个随机交织器并行级联而成,译码器采用迭代结构译码.
短句来源
     This paper present a new HF hopping system,which is called Differential Frequency Hopping(DFH)system. The frequency transition function and the method of signal detection are the key technologies in this system.
     本文介绍了一种新型的短波跳频通信技术——差分跳频,频率转移函数设计和信号的检测方法是差分跳频中的关键技术。
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  “频率转移”译为未确定词的双语例句
     This provides a part of explanation for the phenomenon of frequency shifting before some reservoir earthquake.
     这为某种水库地震前的频率转移现象提供了部分的解释。
短句来源
     The technique is based on multi- dimension space transform, the realizing of this technique is convenience, and it is easy to control the secret key of frequency hopping.
     该方法基于多维空间变换,构造频率转移函数简单方便,而且便于跳频密钥的管理和控制。
短句来源
     The decoding performance of Viterbi algorithm is analyzed with the requirement that the transition function should achieve the best error-correcting performance.
     针对满足最大相关纠错性能的频率转移函数,详细分析了Viterbi算法的译码性能。
短句来源
     A novel G function algorithm for CHESS radio system is proposed,which uses freqency group as frequency-hopping state and then chooses freqency in group. Fuzzy algoritm and selective algorithm are also employed to gruantee the complexity of freqency transition function.
     针对CHESS系统核心技术差分调频算法中G函数存在的缺点,提出一种新的G函数算法,其中频率转移函数采用了模糊算法、选择算法和复杂的分组算法.
短句来源
     A new HF frequency hopped system called as differential frequency hopped(DFH)system is introduced in this paper. The frequencies transition function and the signal detection method are the key technologies in the system.
     介绍了一种新型的短波跳频通信技术——差分跳频,频率转移函数设计和信号的检测方法是差分跳频中的关键技术。
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  frequency agility
Channel error sensing and frequency agility capabilities in the CMs can help in sustaining high performance levels on the upstream channels.
      
Channel error sensing and frequency agility capabilities in the CM's can help in sustaining high performance levels on the upstream channels.
      
Electronic tuning allows frequency agility, matching of unknown and variable loads, and amplitude modulation.
      
Fast frequency agility is important when making multiple-frequency near field measurements.
      
Firstly, we identify two key issues related to the cognitive radio frontend dynamic range reduction and wideband frequency agility.
      
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  frequency transition
Low-frequency transition radiation from a short laser pulse at the plasma boundary
      
A theory is presented of the generation of low-frequency transition radiation by a short laser pulse at a plasma-vacuum interface.
      
In all preparations the frequency transition from 12 to 36 beats?·?min-1 was associated with an increase in resting tension.
      
The population is shifted to any m-state by an adiabatic high frequency transition in a medium field (MFT).
      
The low-frequency transition is characterized by a displacement of electron density along the long molecular axis toward the phenyl ring and leads to an increased proton affinity of the imidazole cycle.
      
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  frequency translation
The frequency translation does not lead to significant spectral deterioration.
      
Based on this design we simulate the effect of various imperfections in the frequency translation process on the output spectrum.
      
A hybrid optimizer could apply frequency translation where appropriate and linear state space optimizations elsewhere.
      
As can be seen from the block diagram, the loop functions as a phase-locked loop with a mixer for frequency translation in the feedback path.
      
Frequency translation to a fixed IF is then performed by the I/Q mixers after which the signal is summed.
      
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Under static condition the acoustic wave detection is applied to study the filtering characteristics experimentally for two kinds of saturated rock specimens (sandstone and granite).The results show that water-saturated rock, through which elastic wave is propagated,can act as a strong low pass filter. This provides a part of explanation for the phenomenon of frequency shifting before some reservoir earthquake.

在静态条件下用声波探测法对两种饱水岩石标本(砂岩、花岗岩)的滤波特性进行了实验研究。结果表明,饱水岩石对传播的弹性波起了强低通滤波的作用。这为某种水库地震前的频率转移现象提供了部分的解释。

In this paper the concepts of transitional frequencies between cumulative states and a few of properties about frequencies and transitional freq uencies are presented by using the basic theory of Markov Process.

本文根据Markov过程的基本理论,提出了累积状态之间的转移频率的概念以及有关频率、转移频率的一些性质,并在数学上进行了论证。利用累积状态之间的转移频率的性质,在计算主要可靠性指标时会带来一些方便。而且,累积状态之间的转移频率的概念则有助于建立直流输电系统的各子系统以及整个系统的等效模型。本文还以高压直流输电系统的一个算例,介绍了本方法的具体应用。

The articla investigated the bounce appearing 2 minutes afterexposure to 500-1000Hz octave band noise at 80-110dB SPL, and itsrelation to the transferring of maximum TTS to high frequency alongwith the level of exposure. The results indicated that when exposureintensity exceeded 90dB SPL, the bounce at 2000Hz and 4000Hz increasedsharply with the level of exposure. When the exposure intensity reached98dB SPL, the bounce no longer increased with the level of exposure.The critical intensity of maximum TTS which...

The articla investigated the bounce appearing 2 minutes afterexposure to 500-1000Hz octave band noise at 80-110dB SPL, and itsrelation to the transferring of maximum TTS to high frequency alongwith the level of exposure. The results indicated that when exposureintensity exceeded 90dB SPL, the bounce at 2000Hz and 4000Hz increasedsharply with the level of exposure. When the exposure intensity reached98dB SPL, the bounce no longer increased with the level of exposure.The critical intensity of maximum TTS which began to transfer to highfrequency was 95dB SPL, which was just the time when the bounce wasin the process of sharp increase at high frequency. Therefore 90dB SPLmay be regarded as the maximum tolerable sound pressure level of 500-1000Hz octave band noise.

本文研究了500-1000Hz倍频程带噪声80-110dBSPL,连续暴露8分钟后,在听阈的恢复过程中听阈的回升与最大TTS随暴露的声级向高频转移时的相互关系。结果表明,当暴露的强度超过90dBSPL时,听阈在2000和4000Hz上的回升随声级增加而增加、而当强度达到98dBSPL以后,回升不再随声级而增加了。最大TTS开始向高频转移时的临界强度是95dBSPL,而此时也正好是回升在高频处于急剧增加的过程中。可以设想,听阈回升的增加和最大TTS的频率转移二者可能都反映着听觉疲劳的发展。因此,为了安全,可以把90dBSPL看做是500—1000Hz倍频程带噪声的最大允许声压级。

 
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