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通道频率
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  channel frequency
     The impulse response invariant method is used as a practical algorithm meeting the requirement of Channel Frequency Class. For eliminating the phase error, both the positive and negative filtering are adopted with a correction for the change of amplitude and frequency characteristics.
     本文就汽车碰撞试验中有关滤波的问题进行探讨,用冲激响应不变法实现了满足通道频率特性要求的实用算法,为了消除相位误差采用正反向二次滤波的方法,但它会引起幅频特性改变,并对此提出了修正的方法。
短句来源
     In the system, we adopt a balance channel frequency offset structure,phase locked IF tracking technique and opened loop precorrection.
     在系统结构上采用了平衡通道频率补偿技术、中频锁相跟踪技术和开环预校正技术。
短句来源
     Ways of cancellation for clutter when its arrival time being integer as well as fractional sampling interval are discussed, the influence of channel frequency properties and nonlinear distortions on system performance are presented, respectively.
     分析了直达波和多径杂波为整数迟延和分数迟延时的杂波抑制方法及性能,讨论了通道频率特性以及通道非线性对相消性能的影响。
短句来源
  “通道频率”译为未确定词的双语例句
     The Effect of Channel Difference of Frequency Property on High Resolution Parameter Estimation Algorithm(MUSIC)
     通道频率特性差异对高分辨率参数估计算法MUSIC的影响
短句来源
     A study of Frequency Response in the Passage for Engine Cylinder Pressure Measurement
     发动机气缸压力测试通道频率响应特性的研究
短句来源
     Optimization Design for Frequency Compensation Device of Power Line Carrier System
     电力线载波通道频率分割装置的优化设计
短句来源
     The frequency of the tip leakage flow is 1.0, 0.59 and 0.51 times the rotor blade passing frequency respectively for the large, middle and small mass flow operating conditions.
     在中等流量工况,其波动频率为0.59倍通道频率。 在小流量工况,其波动频率为0.51倍通道频率
短句来源
     This paper discusses the effect of impulse response aberration between channels on the sidelobe level of a DBF array, and then derives the relationship between the frequency response mismatch and the impulse response aberration of a channel, by which the effect of frequency response mismatch between channels on the antenna sidelobe level is acquired.
     本文研究了通道响应失配对数字波束形成(DBF)天线旁瓣电平的影响,然后分析了通道频率响应失配与脉冲响应失配的关系,进而得到通道间频率响应失配对天线旁瓣电平的影响。
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  相似匹配句对
     Time-frequency system is employed for the channel.
     通道采用时间-频率划分。
短句来源
     ON FREQUENCIES
     频率
短句来源
     X—Band Microstrip Low Noise Frequency MuItiplier
     频率指示器
短句来源
     Investigation in Frequency Band of ICE Pressure Measuring Passage Effect
     内燃机测压通道效应的频率域研究
短句来源
     nformation passage
     信息通道
短句来源
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  channel frequency
Multi-channel frequency analysis of electroencephalogram (electrophysiologic brain mapping) and recording of P300 and somatosensory evoked potentials were performed before, during and immediately after the hypoglycaemic period.
      
A three-channel frequency-modulation telemetry system for the noninvasive measurement of cardiac output, rate of respiration, e.c.g.
      
It is a dual-channel frequency-agile receiver based on commercially available consumer electronics.
      
Two-channel frequency converter with quartz filters
      
The possibility of measuring the parameters of targets and channels and also the spectra of signals in the millimeter wavebands using a universal two-channel frequency-conversion unit and commercial centimeter- wave apparatus is considered.
      
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In this paper the static and dynamic errors of time division multiplier are discussed, and some methods for their improvements are introduced. By using these methods the static error and phase shift at 100c/s can be reduced to 0.1 V (for input and Output ranges between ±100 V) and 2° respectively.

本文讨论了限制脉冲调制乘法器静态及动态品质进一步提高的几项主要误差,提出了减小这些误差的一些方法.这些方法的实现,可将乘法器的静态误差电压减小到0.1伏(满刻度变化为±100伏),并将两个乘量通道的频率特性在100周时的相移减小到2°.

In a hydrodynamic lubricated journal bearing supported rotor system, the oil-film stiffness and damping characteristics are very important to the prediction of vibration performance and to which turbo-generator set designers usually pay much attention. The procedure of experimental determination of such characteristics presented in the past was imperfect since the results obtained were rather dispersive. Many aspects which influence the accuracy of measurement have been investigated in the Bearing Research Group...

In a hydrodynamic lubricated journal bearing supported rotor system, the oil-film stiffness and damping characteristics are very important to the prediction of vibration performance and to which turbo-generator set designers usually pay much attention. The procedure of experimental determination of such characteristics presented in the past was imperfect since the results obtained were rather dispersive. Many aspects which influence the accuracy of measurement have been investigated in the Bearing Research Group in Xian Jiaotong University. Several preliminary conclusions could be made now from the investigation, such as 1. When inverted test rig structure in designed, the inertia terms in the equations of motion play an important part in the force equilibrium and an amount of error will be brought in when they are neglected; 2. The axes of the test bearing and the shaft should be kept parallel as well as possible by the rig structure design; 3. The most important influence of the shaft deflection under load on measuring accuracy is due to the deflection difference at bearing middle and at the position the non-contact transducers are mounted therein, and a correction should be made carefully to the values measured by the tranducers; 4. The "noise" introduced due to inhomogeneity of magnetic and electric conductances at the rotating shaft surface when inductive and eddy current tranducers are used might be in a higher order comparing with the displacement signals; 5. The gain factors and phase factors of the frequency-response functions of an instrument system are different for different channels, therefore a dynamic calibration procedure is necessary. The improvement made by the BRG concerning to and some of the results including data and curves are also introduced in the present work.

在流体动压滑动轴承支承转子系统中,油膜的刚度阻尼特性,对于予测振动是非常重要的,因而经常深受汽轮发电机组的设计师们的注意。然而过去发表的试验测定方法尚不完善,所得结果离散度很大。我们曾经研究了影响测量精度的多方面因素,并得到如下之初步结论:1.当设计的是倒置结构的试验台时,运动方程中的惯性项在力平衡中起相当作用,忽略这一项将产生一定的误差;2.所设计的试验台应尽可能保证试验轴承和轴的轴线平行;3.轴受载挠曲对测量精度最重要的影响是产生于轴承中点处和安装非接触式传感器处的挠度不一样,因而必须仔细地修正传感器的测得值;4.当使用电感式或电涡流式传感器时,由轴的旋转表面导电率和导磁率不均匀产生的噪声可能比位移信号大一个数量级;5.一个仪表系统各通道频率响应函数的增益因子和相位因子是不同的,因而需要采用动态标定措施。本文还介绍了我们的解决方法和结果数据。

The effect of the intermodulation components of radio interferometer on the deviation of the phase estimation is studied and calculated. The principle of selection of channel frequency for the minimization of intermodulation effect of the two channels radio interferometer is discussed, and an example of receiver channel design is presented.

本文研究了射电干涉仪中互调分量对相位估计的影响,讨论了双通道干涉仪通道频率的选取原则。

 
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