推进

The hy-dromechanical performances of the undulatory long dorsal fin propeller of Gymnarchus niloticus are estimated applying the large-amplitude elongated-body theory...

计算表明：&尼罗河魔鬼&在0.728～0.985身长／s的速度范围内，长背鳍波动推进的水动力学效率介于81.664％-86.420％之间，表明长背鳍波动推进游动是一种适应水中环境的高效游动模式。

Gymnarchus niloticus ; the long-based flexible dorsal fin ; undulation contour ; polynomial-fitting function ; MPF ; aquatic bio-propulsion

尼罗河魔鬼；柔性长背鳍；波动包络线；多项式拟合方程；奇鳍/对鳍推进；水下仿生推进

It was concluded that the effects of administration of YT by ip and endermosis is contrary to that of administration by po.The Neostigmine-induced hyperperistalsis of the small intestine was inhibited and the inhibitory effect of Atropine enhanced by ip and sc administration of YT suggesting the mechanism of YT involved the antagonism of Ach. But the contraction of isolated rabbit ileum was not inhibited by YT.

对于羊蹄叶水提取物抗腹泻作用机制的研究表明，腹腔注射、皮肤给药YT可明显抑制新斯的明所致小鼠小肠推进功能亢进，也可加强阿托品抑制小鼠小肠推进运动的作用，从而表明YT的作用机制可能与Ach有关，但家兔小肠离体实验表明YT对Ach所致家兔小肠收缩无明显的抑制作用。

He was instrumentally involved in thedevelopment of the Daniel and Florence Guggenheim Jet Propulsion Center,Caltech's academic focus of instruction and research in jet propulsion.

他参与了加州理工学院喷气推进教学和研究的学术重点-&丹尼尔和佛罗伦萨·古根海姆喷气推进中心&的工作。

This basic research on podded electrical propulsion may be helpful to both ship-owner and ship-designers decision-making and to extend its applications in China.

本文对吊舱式电力推进系统所做的基础性研究，希望有助于船东和设计师的决策分析，以推广船舶电力推进在国内的应用。

As the development tendency of marine electrical propulsion, podded electrical propulsion have been widely applied abroad owing to its excellent characteristics.

作为船舶推进的发展方向之一吊舱式全电力推进船舶以其巨大的优越性得到了越来越广泛的应用。

As the development tendency of marine electrical propulsion, podded electrical propulsion have been widely applied abroad owing to its excellent characteristics.

作为船舶电力推进的发展方向，吊舱式电力推进以其优越的性能在国外获得了越来越广泛的应用。

Double electrical podded propulsion is the focus in ship electrical propulsion research field recently.

双吊舱电力推进是目前船舶推进系统研究开发领域引人瞩目的焦点。

In our country, both the theory and the experiment on electrical podded propulsion are still underway. So, developing our own ship electrical propulsion system is our pressing task.

国内对吊舱式电力推进的理论及试验研究工作仍很初步，因此，发展我国自主研发的船舶电力推进系统己成为迫在眉捷的任务。

Then introduce the frequency conversion and PLC technology, which is widely used in today's podded electrical propulsion.In allusion to the operation feature of double-podded electrical propulsion slewing system, an experimental slewing control system will be designed next.

在充分收集国内外有关技术资料的基础上，针对双吊舱电力推进系统的结构组成和运行特点，提出了一种基于PLC和变频器控制的双吊舱电力推进系统的试验回转方案。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失