可以访问当前AT&TGlobalIPNetwork统计数据，以了解 WWW骨干网络的延迟测定数据。
You can access the current AT&T Global IP Network statistics for the WWW backbone with the latency metrics.
目的：比较用于处理包含未检出值的痕量测定数据的次序统计量回归方法与经典替换方法的估计效果。
Objective: the purpose of this study was to compare the performance of regression on order statistics(ROS) and substitution methods in estimation of nondetects.
统计检验结果表明，两种方法的测定数据组均无异常值并遵从正态分布，因此两种测定方法均具有实用性。
Statistical inspection results showed that the two groups of measuring data determined respectively by GC and UV were in compliance with normal distribution, therefore, both methods are practical.
统计检验结果表明，两种方法的测定数据组均无异常值并遵从正态分布，因此两种测定方法均具有实用性。
Statistical inspection results showed that the two groups of measuring data determined respectively by GC and UV were in compliance with normal distribution, therefore, both methods are practical.
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