Short-time average energy, short-time average zero-crossing rate and short-time energy-zero-product are introduced.

介绍了短时平均能量法、短时平均过零率法和短时能零积法三种语音端点检测法。

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Most of these methods fall into two categories: based on the crossing rate and based on the covariance of the received signal.

这些方法大致可以分为两类：一类是基于通过率的方法，另一类是基于协方差的方法。

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The involved parameters are short-time amplitude and energy, lst-and2nd-order zero-crossing rate, autocorrelation function and pitch period.

所使用的参数是：信号的短时幅度与能量、一阶和二阶过零率、自相关函数及基音周期等。

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First, the rate of crossing over is quite variable in women, but not in men, though nobody knows why.

ECONOMIST: Human genetics

We expect the natural gas production volume to follow an increasing trend, crossing 1300 mcf by the end of the Trefis forecast period, an average annual growth rate of around 5%.

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