This new type of brushless double-feed machines rotor is designed by pole-changing method.

这种新型的无刷双馈电机转子采用变极原理设计。

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Through theoretical analysis and numerical simulation, the pattern reconfigurable feasibility of the structures of butterfly, folded dipole and double-feed is analyzed.

本文通过理论分析和软件数值仿真，分析了蝶形结构、折合偶极子结构以及双馈方式实现方向图可重构的可行性。

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The World Health Organisation has predicted that meat consumption will double by 2050, and the increasing cost of animal feed is likely to rapidly inflate the price of meat before then.

世界卫生组织已经预测，肉类消耗在2050年将会翻倍，而且随着动物饲料成本越来越高，很可能在那到来之前肉类价格飞速上涨。

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And given that the krill (tiny crustaceans) that penguins feed on are also dependent on the ice for their own existence (they feed on algae on the ice) - some colonies affected by eroded floes could face a double-whammy of high fledgling mortality and restricted food resources.

BBC: Emperor penguins counted from space