Because it is very difficult to realize a frequency pattern as exponent curve rising and inverse exponent curve falling by a common hardware logical combination, so it is achieved by software.

以软件方式实现一般硬件组合逻辑难以达到的指数曲线升频和逆指数曲线降频规律。

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If you graph the frequency of various possible results, it's possible to see a pattern of peaks at random-looking series and valleys at the ones that chance would seem to disfavor.

如果用图表画出不同可能性结果的频率，你可能会看到一种模式，貌似随机的序列处于峰值，那些碰巧看上去不太受人喜欢的序列位于谷底。

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Similarly, the power law pattern can be seen in the frequency and magnitude of the monthly swings, positive and negative, in us industrial production from 1919 to February 2009 (Exhibit 2).

类似地，幂指数定律模式也可在美国1919 - 2009年1月间的工业生产的月度摆动(绝对值)频率和级别中被发现(表2)。

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Both sending and receiving stations would, however, need some mechanism to encode and control the frequency-hopping pattern.

ECONOMIST: Player-piano pioneer

It could change the frequency of the Pacific pattern known as El Nino, a cycle of peculiar weather that affects ocean currents and rainfall across the planet.

NPR: Pacific Island Cultures Brace for Climate Change

The pattern of damage was similar to the pattern of big-storm frequency uncovered by Dr Elsner.

ECONOMIST: Eye on the storm | The