For hybrid power system composed of a fuel cell engine and a group of Ni-H batteries, a new control method with a bi-directional power converter is proposed.

在燃料电池发动机和镍氢电池组组成的混合动力系统中，提出了通过一个双向电源变换器实现双电源输出功率混合的控制方法。

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Foreign media generally take H-6K as a medium-range and long-range strategic bomber, which they believe can reach the flying range of 8,000-9,000km when equipped with new engine and avionics system.

而外媒一般将轰- 6 K评述为中远程战略轰炸机，认为它经过换装新发动机以及航电等系统，航程可达8000 - 9000公里。

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Aim to raise the H-NE math model for designing engine radiators.

提出内燃机散热器设计的H - NE数学模型。

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In 1947, the Hughes H-4 Hercules, an eight-engine flying boat, built by Howard Hughes, made its one and only flight of just over a mile in Los Angeles harbor.

CNN: Monday,