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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
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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)。
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3)  Middle Frequency (MF)
中位频率(MF)
4)  IF Frequency
中频频率
5)  Frequency shift
频率位移
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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。
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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
　　
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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