查询词典 speed

James Counsilman, had several aquariums in his house, and we spent a great deal of time in the 1940s and 1950s discussing fishlike movements, especially their ability to accelerate from a dead stop to full speed in virtually the blink of an eye, as well as the phenomenal speed that sea creatures can generate in open water.

我的教练，James Counsilman博士在他家里有几个鱼缸，并且我们在20世纪40和50年代花了大量时间来讨论鱼类游泳运动，特别是它们能在瞬间从静止加速到全速的能力，包括天然水域海洋生物能产生的显著的速度。

The interaction of flow speed and flame speed influences the flash back.

而气流速度和火焰传播速度的相互关系对回火有很大的影响。

This speed is great for going up a hill that is steep, but it is not a good speed for flat ground or racing downhill.

这是伟大的高速增长是山坡陡峭，但它并不是一个很好的速度为平地或赛车下坡。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点，介绍了异步电机调速系统的不同控制策略，详细论述了异步电机矢量控制系统的基本原理：异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等，并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

This method has realized the state space decomposition of rotational speed and flux with the help of support vector clustering technique. In the process of clustering,the author proposed a proximity graph-based dynamic kernel parameter clustering method that is suitable for the control of motor rotational speed and glue pump flux in MDF production to solve the problem of high complexity of relative matrix calculation.

该辨识方法利用支持向量聚类技术实现电机转速与泵流量的状态空间分解，应用支持向量分类技术设计了多模型切换策略，并运用支持向量回归技术构建了状态空间内的转速与流量辨识模型。

The subject can fly up at half speed and descend at double speed.

他能以一半速度上升，或者以两倍速度下降。

And can Jiqinggaosu or foreshore Levin convenient access to high-speed Beijing-Shanghai high-speed, transportation is very convenient.

并可以通过济青高速或滨莱高速方便地进入京沪高速，交通十分便利。

By narrowing the sprockets, spacers, and chain width, they made a 6-speed freewheel that was the same width as a 5-speed and fitted on a 120-mm hub.

通过缩小链轮，垫片，和连锁宽度，也提出了6速飞轮这是作为一个5速和1 120毫米枢纽配备相同的宽度。

The existing eguipment on railway rolling stocks, backward in technical property and with a single variety, could not meet the reguirement of high speed and heavy load.Chengdu Freight Wagon Factory, with rich manufacturing and maintaining experiences, is the large-scale factory, which manufactures railway freight wagon and freight engine in China. Already turned deficits into surpluses, with the enforcement of raising speed strategy of railway cargo transportation and quickness of technique renew, CFWFs operating system is now facing great challenge of market opening.

成都机车车辆厂就是其中的一个典型，虽然成都厂是国内从事铁路机车车辆维修和机车电机制造的大型企业，具有丰富的生产维修制造经验，但随着铁路电气化和提速战略的实施，技术更新步伐的加快，成机厂的经营机制在几年前就已面临市场开放的巨大挑战，核心产品上的优势地位也受到很大威胁。

We analyze the principle of stick-slip motion deeply. From foregoing analysis a result was made that dry friction is the main factor in influencing low speed capability of electro-hydraulic servo system. Dry friction must be compensated for improving the low speed performance. Then a nonlinear model with friction is set up and control methods is discussed.

深入分析了汽轮发电机转速不稳定的原因是由于电液伺服系统在低速区性能不稳定，而影响电液伺服系统低速性能的主要因素是干摩擦，要提高电液伺服系统的低速性能必须对摩擦力进行补偿。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。