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正交相位
相关语句
  quadrature phase
    A compensation method in quadrature phase detection of directional blood flow information
    利用正交相位法提取双向性血流的一种补偿方法
短句来源
    Quadrature phase method is one of the important methods in directional blood flow information detection using Doppler ultrasound techniques.
    正交相位法是超声多普勒技术中提取双向性血流信息的一种重要方法。
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  “正交相位”译为未确定词的双语例句
    The possibility of constructing open quadrature birdcage as soft coil and quadrature phased array as lumber coil is presented.
    需经历调谐、阻抗匹配等步骤。 阐述了鸟笼式谐振器正交工作原理和开鸟笼正交谐振器的可行性,给出了正交相位阵列方案。
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  quadrature phase
However, for the long waves observed in the Pacific, the slow mode tends to propagate eastward when the SST and wind stress anomalies are close to each other (within a quadrature phase relationship).
      
Phase spectral observations demonstrate clearly the vortex like structure of coherent disturbances in the flow by virtue of the quadrature phase relation between the schlieren and microphone signals.
      
Local sea-surface temperature (SST)-rainfall anomalies display a negative simultaneous correlation in the off-equatorial regions but a zero correlation (quadrature phase relationship) near the equator.
      
Quadrature phase relationships between the response properties of adjacent cortical cells is suggestive of several highly efficient information processing strategies.
      
Digital In-phase(I) and Quadrature phase(Q) imbalance correction schemes are presented for improving the balance between I >amp;amp; Q signals by rejecting the image frequencies due to imbalance.
      
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Quadrature phase method is one of the important methods in directional blood flow information detection using Doppler ultrasound techniques. There exists the imbalance of amplitude and phase between the pair of quadrature signals, which leads to the crosstalk between the forward and reverse blood flow information. This effect may bring errors in mean frequency and maximum frequency estimation and sonogram displaying. Using the compensation method described in this paper, a pair of quadrature signals with balance...

Quadrature phase method is one of the important methods in directional blood flow information detection using Doppler ultrasound techniques. There exists the imbalance of amplitude and phase between the pair of quadrature signals, which leads to the crosstalk between the forward and reverse blood flow information. This effect may bring errors in mean frequency and maximum frequency estimation and sonogram displaying. Using the compensation method described in this paper, a pair of quadrature signals with balance between the amplitude and phase was obtained by letting the quadrature signal pass through a designed linear filter with certain characteristics, which may improve the performance of directional blood flow detection of Doppler ultrasound system.

正交相位法是超声多普勒技术中提取双向性血流信息的一种重要方法。由于正交信号对之间通常存在幅度和相位的不平衡,从而导致了正、反血流信息的混淆,影响了平均频率、最大频率的估计和声谱图的正确显示。本文提出的补偿方法,让其中一个正交信号通过按一定要求设计的线性滤波器,从而得到幅度和相位基本平衡的正交信号对,提高了超声多普勒系统提取双向性血流的性能

Physical essentially nature of MRI RF coil is discussed in this paper.The possibility of constructing open quadrature birdcage as soft coil and quadrature phased array as lumber coil is presented.

阐述了MRI射频线圈的工作原理,指出与梯度线圈、主线圈的本质区别在于前者工作于谐振状态,而后者工作于非谐振状态。因此,RF线圈必须构成驻波谐振器。需经历调谐、阻抗匹配等步骤。阐述了鸟笼式谐振器正交工作原理和开鸟笼正交谐振器的可行性,给出了正交相位阵列方案。

 
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