PAS Wireless Access Frequency Plan.

系统无线接入信道频率。

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Count of URL Access Frequency: The map function processes logs of web page requests and outputs.

URL访问计数：map函数处理web页面的请求日志。

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The efficiency becomes critical when the access frequency of an ASP system reaches a certain degree.

ASP系统在访问量达到一定程度后，其效率问题成为系统的关键。

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The SEC has already proposed a number of changes designed to address their growing influence, including extra restrictions on broker-dealers that provide direct market access to high frequency traders, a trader tracking system for large traders, circuit breakers that would slow trading in individual stocks if they fall more than 10%, and new rules for off-exchange trading venues.

FORBES: SEC Wants Real Time Trading Data

The SEC is proposing a ban on flash trading along with other issues grabbing headlines, like direct market access for high-frequency traders.

FORBES: Birth Of A Stock Exchange

The problem, Mr. Lauer says, is that ETF firms at times give high-frequency traders access to the inner mechanics of how the ETFs operate.

WSJ: High-Speed Trading in the Spotlight