用预定的导频调制机制来调制每个导频子载波信号。

Each pilot sub- carrier signal is modulated with a predetermined pilot modulation scheme.

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通过数学运算和近似处理，得到了动态散斑强度涨落的空-时相关函数的解析表达式，从理论上揭示了散斑受超声调制的过程，对散射介质中的声光调制机制做出了新的诠释。

The specific space-time intensity correlation function of dynamic speckle has been derived and opens out the mechanism of the dynamic speckle modulated by ultrasound in scattering medium.

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目的：分析K物质在大鼠中脑导水管周围灰质中参与痛觉调制的作用，揭示内源性镇痛系统的神经递质机制。

AIM: To analyze the effect of substance K on pain modulation in the periaqueductal gray (PAG) of rats and indicate the neurotransmitter mechanism in endogenous analgesia system.

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