位24:0 DATACOUNT：数据计数数值(Data count value) 读这个寄存器时返回待传输的数据字节数，写这个寄存器无作用。 注意：只能在数据传输结束时读这个寄存器。
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For example, suppose you want to perform a count of the rows where the XML data column has an element text with the value This should validate!.
例如，假设您想要计算其XML数据列的text元素的值为This should validate ！的行的数量。
The analysis of measurement data error by using rear-average method was discussed. The method to count standard deviation of indirect measurement value by using rear-average method was proposed.
对用后均法进行测量数据误差分析加以探讨，提出可以用该法计算间接观测值的标准偏差。
Set template images real time, count data and error gate value automatically.
实时建立标准图像，自动计算数据及误差阀值。
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