These will decrease the propulsion efficiency and increase fuel consumption.
船舶污底引起阻力增加，降低了船舶的推进效率，增加了耗油量。
The boss vortex cavitation of propeller can be avoided by PBCF, and an increase of 2% in propulsion efficiency has been measured in the model tests.
桨毂帽鳍可改善毂涡空泡，模型试验状态下可提高推进效率2%左右。
Enlightened by the high efficiency and celerity of the fish propulsion in nature, the bionic study of fish propulsion has become a hot topic in the technology of underwater propulsion.
受自然界鱼类推进的快速性和高效性启发，仿鱼推进技术研究已成为水下推进技术研究的热点。
The propeller is not only favorable to enhance the efficiency of marine propulsion systems, but also can generate large pushing force.
该螺旋桨不仅有利于提高船舶推进系统的效率，而且能产生较大推力。
Fish and ocean mammal have excellent propulsion and maneuvering system, whose advantages are high efficiency and low noise.
鱼类和海洋哺乳动物有良好的推进系统和操纵系统，其突出的优点是效率高、噪声低。
Fish and such swimming animal have excellent propulsion and maneuvering system, whose advantages are high efficiency and low noise.
鱼类等水生动物具有非凡水中游动能力，其推进和操纵系统的突出优点是高效率、低噪声、良好机动性。
Fish and Ocean mammal have excellent Propulsion and maneuvering system, whose excellences are good efficiency and low yawp.
鱼类和海洋哺乳动物有良好的推进系统与操纵系统，其突出的优点是效率高、噪声低。
The SPC-II fish robot prototype is an experimental platform which validates the stability, high efficiency and maneuverability by utilizing the caudal fin propulsion mechanism.
SPC - II型仿生机器鱼是利用尾鳍推进机理，实现机器鱼稳定、高速游动和验证机动性的一个实验平台。
AC power propulsion systems have the requirements of high efficiency, low harmonics and noise.
电力推进系统的设计需满足高效率、低谐波和低噪声的要求。
With a few changes on the traditional drive train and low cost, the efficiency of this propulsion system can reach the efficiency of multi-energy management of the combined hybrids.
这种动力系统是以较低的成本通过对传统传动系统进行较简单的改造来实现混联式结构，并达到与传统混联式相当的多能源优化控制效果。
With a few changes on the traditional drive train and low cost, the efficiency of this propulsion system can reach the efficiency of multi-energy management of the combined hybrids.
这种动力系统是以较低的成本通过对传统传动系统进行较简单的改造来实现混联式结构，并达到与传统混联式相当的多能源优化控制效果。
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