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1)  mean frequency
中位频率
1.
Relation between changes of sEMG s mean frequency and changes of blood lactate content with different loads during exercise;
不同负荷强度运动时表面肌电图中位频率与血乳酸浓度变化的关系
2)  median frequency
中位频率
1.
All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR) were analyzed.
方法 AIS患者25例,男7例,女18例,年龄11~21岁;所有患者均执行BST实验、抬物实验,采用芬兰ME6000型表面肌电仪记录患者凸、凹侧椎旁肌表面肌电信号频域指标中位频率(MF)、平均功率频率(MPF)、过零点率(ZCR)。
2.
All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR)were analyzed.
方法AIS患者25例,男7例,女18例,年龄11~21岁;所有患者均执行BST实验、抬物实验,采用芬兰ME6000型表面肌电仪记录患者凸、凹侧椎旁肌表面肌电信号频域指标中位频率(MF)、平均功率频率(MPF)、过零点率(ZCR)。
3)  Middle Frequency (MF)
中位频率(MF)
4)  IF Frequency
中频频率
5)  Frequency shift
频率位移
6)  Frequency Shift
频率移位
1.
The frequency shift method in initial vector selection is introduced.
本文对特征向量导数计算的Lanczos法进行了改进,指出Lanczos法对方程的缩阶效率取决于初始向量的选择,介绍了Lanczos方法的发展,提出采用频率移位法选择初始Lanczos向量。
补充资料:频率计量(见时间频率计量)


频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology

  口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
  
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