A kind of image encryption algorithm is presented based on chaos theory and cycle shift.

提出了一种基于混沌理论和循环移位的图像加密算法。

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This shift means that the usual relationship between America's business cycle and commodity prices may change. Past American recessions have sent the prices of oil and other resources down.

这种格局变化意味着大宗商品价格与美国经济周期同步波动的历史可能改变，美国衰退已不大可能会引致油价下跌。

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You can actually shift your daily alertness cycle by going to bed earlier, he suggests. Another way to gear up in the morning is to go outside into the daylight as early as possible after you wake up.

Randler建议说，你当然可以通过早睡来改变你的生物钟，另一种方法就是你醒来后，尽可能早地到户外暴露在日光中去。

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Ghai notes that he has been cautious on the provider of enterprise wireless networking gear ahead of an expected upgrade cycle in expectations that a shift to the higher speed 802.11ac standard could cause a pause in the market.

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Fortunately for him, several years later a shift in clan enmities and alliances ended the whole cycle of revenge killings and united both clans against a common enemy, a neighboring tribe.

NEWYORKER: Vengeance Is Ours

The Amazon forest provides a relevant example: due to the interaction of deforestation, fire and climate change, it is predicted that the Amazon could undergo a widespread dieback in the future, with parts of the forest moving into a self-perpetuating cycle of more frequent fires and intense droughts, leading to a shift to savanna-like vegetation.

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