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低频带     
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  low frequency band
     Results First day after irradiation, the main frequency of EEG, whether from the frontal or occipital region, shifted down from high frequency band to low frequency band, the maximum power values were increased compared with those before irradiation(P<0 05, P<0 01, respectively).
     结果 照射组 :照射结束后第 1天 ,EEG主频率 (额区和枕区 )比照射前移向较低频带 ,最大功率值则显著增加 (额区P <0 0 5 ,枕区P <0 0 1) ;
短句来源
     Therefore, wavelet coefficients mostly muster low frequency band
     高分辨率子图上大部分数值接近于0,不为0的小波系数主要集中在低频带
短句来源
     Experiment shows that the optimum experiment scheme is acoustic tile perforation rate at8.7%and pore size of6mm that can greatly improve the acoustic property of mineral wool acoustic tile in low frequency band and guarantee physical property of the material.
     实验表明,吸声板穿孔率8.7%,孔径6mm的试验方案最佳,可大幅度提高矿棉吸声板在低频带的吸声性能,又能保证材料本身的物理性能。
短句来源
     The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
     反映滚动轴承故障的特征周期信号处于较低频带内,容易被噪声淹没,难以检测。
短句来源
     The cutting sound signals were analyzed in detail by statistics,and the low frequency band,middle frequency band and high frequency band of the cutting sound signals in audible domain were analyzed separately by means of power density spectrum.
     文中运用统计方法对切削声信号进行了深入分析,并对可听阈内的声信号按低频带、中频带和高频带分别进行了功率谱分析。
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  lower band
     According to the theory of sub-band coding, 0~8kHz band is split into two equal bands, lower band 0~4kHz and higher band 4~8kHz. When imitation realization 14.4kbit/s coding the lower band adopt G. 729A and higher band adopt low bits rate G.
     根据子带编码原理,将0~8KHz的带宽等频带划分为0~4KHz和4~8KHz低频带与高频带,低频子带采用G.729A,仿真实现14.4kbit/s时,高频子带采用编码速率较低的G.729D。
短句来源
     The lower band is based on simplified coding standard G.
     729,对低频带使用简化的G.
短句来源
  “低频带”译为未确定词的双语例句
     and HRV analysis showed elevation of low frequency power (P_2) and low frequency power-to-high frequency power ratio (P_1/P_2) (P<0.05).
     HRV频域分析显示低频带功率(P_1)和低、高频带功率比(P_1/P_2)显著升高(P<0.05)。
短句来源
     24 hours dynamic electrocardiogram with the analysis software of HRV was used to analyse HR(hear rate)、percentage(PNN 50)between R-R and the period>50 ms、CV(coefficient of variation)、LF(low-frequency)、HF(high-frequency)、LF/HF.
     用 2 4h动态心电图 (含有HRV软件 ) ,进行心率 (HR)、相邻R -R间期 >50ms的百分比 (PNN50 )、变异系数 (CV)、低频带 (LF)、高频带 (HF)、低频 /高频 (LF/HF)的统计学分析。
短句来源
     whereas there was no significant difference of TP,VLF,LF,HF,LF NU and LF/HF and LF/HF in the hyperthyroidism both in waking and sleeping hours.
     甲亢组总功率谱密度 (TP)、极低频带 (VLF)、低频带 (LF)、HF、LFNU、HFNU、LF/HF在清醒期和睡眠期比较无显著差异。
短句来源
     Because the differential pressure signal of oil-gas two-phase flow was a typical non-stationary and multi-component signal,EMD was first applied to break up it into Intrinsic Mode Functions(IMFs) which can be divided into three frequency bands such as high-band(30~50 Hz),mid-band(5~30Hz) and low-band(0~5 Hz).
     油气两相流差压信号是一典型的非平稳多组分信号,经验模态分解首先将差压信号分解成9阶本征模函数,按照频率范围可以划分为3个子带:高频带(30~50 Hz),中频带(5~30 Hz)和低频带(0~5 Hz).
短句来源
     The included angle between the five and six membered rings in PHSIM is 43°, while in BSIM, two five membered rings are perpendicular. The CO stretch vibration splits into two bands in these compounds (1 740 cm -1 and 1 795 cm -1 in PHSIM, and at 1 773 cm -1 and 1 802 cm -1 in BSIM), and the lower frequency band is much stronger than the higher one.
     它们分子中羰基伸缩振动带均分裂为 2个 ,在PHSIM中为 1 74 0cm-1 、1 795cm-1 ,而在BSIM中为 1 773cm-1 、1 80 2cm-1 ,且低频带的振动强度远大于高频带。
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  low band
The 6 remaining nestlings had 5 or more mismatched bands each, low band-sharing proportions with their putative father and high band-sharing proportions with their putative mother.
      
The optical properties for a P3HT:PCBM active layer and a model Lorentzian low band gap spectrum are optimized and ideal fabrication conditions are reported for these materials.
      
The electronic requirements for high haemocompatibility, which result from this model (especially a low band-gap density of states and a high surface conductivity) are fulfilled by an amorphous alloy of silicon and carbon (a-SiC:H).
      
Also, for the first time microcrack features in a low band gap semiconductor have been examined with STM.
      
Major events early in this century (MS≥7) are associated with lowb and highDc, respectively consistent with greater stress intensity and greater spatial clustering of epicenters-both implying a greater degree of stress concentration at this time.
      
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  low frequency band
The total RR-interval spectrum power (800 ± 98 ms2) in the TGs of the native population is shifted to the very low frequency band (VLF, 52%), which indicates predomination of the humoral-metabolic HR regulation level.
      
Whistles belong to a relatively low frequency band, contain many harmonics, and have a simple shape of frequency contour.
      
On the possibility of quasi-vertical radio sounding of the ionosphere in the extremely low frequency band
      
The WPT is able to decompose an image into low frequency band and high frequency band in higher scale.
      
Then WPT transform is employed to decompose the intensity component and SPOT (Systeme Pour I'Observation de la Therre) image into low frequency band and high frequency band in three levels.
      
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  lower band
The complexes corresponding to the upper retardation band were RNA-specific, and those corresponding to the lower band were assumed to result from nonspecific sorption of [32P]p-17 on a protein.
      
On the splitting of the lower band of charged elementary excitations of a two-dimensional antiferromagnet
      
The lower band is mainly formed by oxygen 2s states.
      
It is shown that the Coulomb interaction between oxygen and copper holes significantly renormalizes the spectrum of lower band Fermi excitations and modifies the concentration dependence of the chemical potential on the doping level.
      
We report results on a 5×5 cluster; from the first 8 moments of the density of states, we estimate a lower band edge for the holon, which is fairly insensitive to details of the RVB wave function.
      
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The 1R absorption spectra of water in lysozyme film with various degree of hydration were recorded.At room temperature one high frequency band and one or two low freguency bands in both OH and OD regions are located.The frequency shift depends on the water content of lysozyme film. At low temperature radio A2420cm-1/A2480cm-1 raises with increase of water content, while R>0.2. The possible causes of high and low frequency bands and their relation to the freezing process were discussed.

本文报导了不同水含量的溶菌酶中水的红外吸收光谱的测量结果.室温下,在远离纯水OH带及OD带的两侧分别出现高频与低频带,峰的位移大小随水含量的不同而改变.低温下,当R(克水/克蛋白)>0.2后,比值A./A.随水含量增大而增大.本文对室温下高频及低频峰的可能原因及与水的冻结过程的联系进行了讨论.

This paper treats of the working principle of controlling the central frequencies of the active band filter by Z80 microprocessor. The result of experiments shows that when the programmable method is applied in digital control, the range of change in the central frequency may be more than 10 times that of low port, with a rise-and-fall amplitude less than 2.8%, and a quality factor larger than 40. This filter of programmable frequency will serve for filtering in the antijamming circuit of low frequency amplitude...

This paper treats of the working principle of controlling the central frequencies of the active band filter by Z80 microprocessor. The result of experiments shows that when the programmable method is applied in digital control, the range of change in the central frequency may be more than 10 times that of low port, with a rise-and-fall amplitude less than 2.8%, and a quality factor larger than 40. This filter of programmable frequency will serve for filtering in the antijamming circuit of low frequency amplitude modulation.

本文介绍了Z80微处理器控制有源带通滤波器的中心频率的工作原理。在应用编程方法实现数控时,试验结果得到它的中心频率变化范围可以达到十倍以上,幅度起伏小于2.8%,品质因紊大于40。这种数字与模拟电路相混合的低频带通中心频率可编程的滤波器,可在抗低频调幅干扰电路中作滤波处理。

The amplitude, frequency and velocity of reflection are the basic physical parameters for hydrocarbon indication, but they can be influenced by local conditions. The method which calculates HCI residual curve by tendency curve instead of mean can bring quite good result in eliminating the regional effect and enhancing local abnormal. In this paper, it is demonstrated that the hydrocarbon in a formation can be located by analysing some residual HCI curves, namely, time domain residual amplitude curve[DAT(i)],...

The amplitude, frequency and velocity of reflection are the basic physical parameters for hydrocarbon indication, but they can be influenced by local conditions. The method which calculates HCI residual curve by tendency curve instead of mean can bring quite good result in eliminating the regional effect and enhancing local abnormal. In this paper, it is demonstrated that the hydrocarbon in a formation can be located by analysing some residual HCI curves, namely, time domain residual amplitude curve[DAT(i)], residual wide-band total energy curve[DQF_w(i)], residual low-frequency-band energy curve [BQF_τ(i)], the curve of residual percent energy in low frequency band [DRF_(LW)(i)], residual center frequency energy curve[DF_M(i)], the curve of residual energy over peak frequencies[DF_H(i)], residual interval velocity curve [DVT(i)]and summation curve. The test on 12 exploratory wells and 40 km seismic section shows that the success is about 82%. The basic principle is briefed and the mathematical formula of the summation curve given.

碳氢检测以反射振幅、频率和速度为基础物理量,它们存在着区域性影响。用趋势曲线代替平均值计算HcI剩余曲线的方法,在去掉区域性影响,突出局部异常方面收到了较好的效果。文中介绍了用时域振幅剩余曲线DAT(i)、宽频带总能量剩余曲线DQF_w(i)、低频带通能量剩余曲线DQF_L(i)、低频带通能量百分比剩余曲线DRF_(LW)(i)、中心频率剩余曲线DF_M(i)、峰值频率剩余曲线DF_H(i)、层速度剩余曲线DVT(i)以及综合曲线(SUM)来判定HCI剩余曲线含有油气的可能性。通过与12口探井和40公里实测地震剖面的检验,其符合程度好的和比较好的约为83%。文中还简述了碳氢检测中综合显示曲线(SUM)的基本原理及数学计算公式。

 
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