The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.

研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。

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You need to know sizes, persistence, priority, and frequency distribution, plus have the ability to correlate message affiliations within the data stream, such as matching requests to replies.

您需要了解大小、持久性、优先级和频率分布，还要能够使数据流中的消息关系相互关联起来，例如将请求与应答进行匹配。

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The organizations will use stream-computing technology to analyze data from sensors that track high-frequency radio waves, the Swedish Institute of Space Physics (IRF) said in a statement.

这两家研究机构组成的研究小组将使用流运算技术来分析高频电磁波传感器记录的数据。 按照研究小组的说法：“明年，这项计划中每秒需要处理的数据量高达6GB，而每小时的数据量则多达21600GB,后者几乎是互联网上所有网页大小的总和。”

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When iTrip Auto is connected to an iPhone or iPod touch, Aha detects and launches its Griffin iTrip-specific settings to help the driver find an unused FM frequency on which to stream their Aha stations.

ENGADGET: Griffin adds Aha by Harman to its iTrip Auto in-car FM transmitter

The laser beam in the scanner shoots a steady stream of photons, all of the same frequency, at the plastic.

ECONOMIST: Recycling