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After building the mathematical model of marine impellent system by means of MATLAB,this paper adopted traditional PID algorithm and used the genetic algorithm to regulate the parameters of PID controller for making simulation and analyses on the speed control system of certain ship.

利用MATLAB建立了船舶推进系统的数学模型，采用传统的PID算法，并利用遗传算法整定PID参数，对某船航速控制系统进行了仿真分析。为反映真实情况，文章分别仿真了船舶在无干扰、5%、10%及20%干扰情况下航速及螺旋桨转速等参数的变化，仿真结果显示遗传算法整定PID参数用在船舶航速控制系统上是可行的

The impeller speed was 4,200 rpm, and the flow rate was 100 ml/min.

叶轮的速度是4200每分钟转速，流速为100毫升/分钟。

It was shown that the value of mixing time was dependent on the speed and position of impeller.

结果表明：搅拌转速和搅拌桨安装位置都影响混合时间的大小，而进料位置对混合时间的影响不大。

Results of this thesis provide guiding significance to waterpower design of impeller of the low specific speed centrifugal pump.

对低比转速离心泵叶轮的水力设计具有一定的指导意义。

The results of the speed of flow field and pressure distribution in the impeller are obtained. Some important flow phenomena are found.

并对数值计算结果进行了深入的分析研究，为叶轮的水力设计提供了有价值的信息。

However the reserves of rotor speed, flow capacity and power of impeller should be considered early in design.

因此，在核心机及基本发动机研制中，既要有燃气温度和转速的储备，又要有高压压气机性能的储备。

Torque is up to 553 lb-ft. The Continental GT Speed benefits as well, jumping to 650 horses and 612 lb-ft. A revised control unit for the Bentley's air suspension is part of the package as well, allowing the Imperator to be lowered 30mm up front and 20mm at the rear for a more race-ready look.

扭矩可达553磅-英尺大陆GT的好处，以及高速，跳跃到650匹马和六百十二英镑-英尺经修订的控制单元为本特利公司的空气悬架是一揽子的一部分以及，让皇帝可以降低30毫米和20毫米的锋线在车尾更种族准备期待。

The use of linear motor in industrial application is increasing in the past few years. Meanwhile, as the need for high speed and high precision in the modern processing technology is increasing imperiously, traditional motors are replaced by linear motors.

中文摘要近几年来，线性马达在工业上的应用有显著的增加，随著现代化加工技术对於高速化、高精度加工的迫切需求，目前在精密机械产业上线性马达已逐渐取代传统马达成为市场新主力。

He proved during the second half of last year that he's ironed out the impetuousness that blighted the start of his '09 campaign, and his natural speed has never been in doubt.

他在去年前半赛季失利使他的09冠军梦破灭，但是后半赛季良好的表现已经证明了他已经消除了浮躁，而且毫无疑问，他就是快。

Vertical scanner is the supporting part of a series process ion implanter , which transfer high speed movement from outside of the chamber to the target inside.

垂直扫描机构是单晶片离子注入机靶盘的支撑部件，起着将高速直线运动从靶室外传递到靶盘的作用。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"