查询词典 high speed

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

The highest speed between hurdles of Liu Xiang surpass the average speed of the other 8 top 110m hurdlers' technique in world track and field championship in Paris France 2003 . The number of the clearance of hurdles in a high speed is as many as others.

刘翔的最高栏间速度超过了2003年法国巴黎世界田径锦标赛前8名的运动员平均最高分栏速度，保持高速度过栏的区间数也同其他优秀运动员相当，具备了战胜世界顶尖高手的实力。

Joining Professor Yuen is Dr Jack Lo, Acting Director of SPEED who has made explanation of the new logo as the mathematical symbol of "final answer" as a sign of SPEED's commitment to provide high quality education programmes.

专业及持续教育学院院长阮博文教授表示非常高兴SPEED采用全新标志，标志新里程；专业进修学院署理院长罗文强博士则解释新标志以象徵「答案」的数学符号，代表学院致力提供高质素的课程。

Motion synchronization between tool in X direction and principal axis rotation was controlled by electronic gearbox in cam turning. And profiling mechanism could be superseded by servo tool-holder. Linear motor direct drive servo tool-holder was designed, and host-slave control system with PC and DSP was developed for the require of high-speed and realtime servo. The technical process was analyzed in cam turning. Servo tool holder with tool swinging and principal axis variable rotate speed were presented to keep constant cutting angle and speed.

将电子齿轮箱用于凸轮车削加工系统的传动，以伺服刀架取代了传统加工的靠模装置，实现了刀具X方向直线运动与机床主轴转动的同步控制；设计了直线电机直接驱动的伺服刀架及基于PC与DSP构成的上—下位机控制结构，采用DSP进行实时控制以满足高速伺服需要；对凸轮加工过程的工艺特点与恒角度、恒速度车削进行研究，提出了具有刀具摆动功能的伺服刀架与机床主轴变转速运动方案。

Giant if why the hub of the plane props up a 421 tons airframe when land weight and descend speed, high speed train is why can with so fast speed travel... recently, the world's banner bearing and special type steeliness build Shang Tiemu to agree company peak of Chinese science and technology is held to meet in Shanghai.

巨型飞机的轮毂如何在着陆时支撑起421吨的机身重量和降落速度，高速列车又是为何能以如此快的速度行驶……近日，世界领先的轴承与特种钢制造商铁姆肯公司在上海召开中国科技峰会。

The flaps limit the terminal speed, like a feather never accelerate to a high speed, and hence the hitting speed.

扰流板有拑制终极速度的效果，就像羽毛一样永远不会加速得冲下来一样，所以著地时不会太快。

For new HSR,"although the world speed record for a wheeled train was set in 1990 by a French TGV which reached a speed of 515 km/h (320 mph),"(Quade, 2003) high-speed trains typically travel at top service speeds of between 250 km/h (150 mph) to 300 km/h (180 mph).

新叶， "尽管目前世界速度纪录轮式火车是在1990年由一位法国的TGV达速度515公里/小时( 320英里)，"( quade ， 2003 )高速列车一般旅行顶服务速度在250公里/小时( 150英里)，以300公里/小时( 180英里)。

When axial diameter is 70mm its rotate speed can be amounted to 18, 000rpm, speed is 1.3 times original, lubricate at using oil gas before applicably the high speed domain of type bearing.

在轴径为70mm时其转速可达18，000rpm，速度是原来的1.3倍，可适用于以往使用油气润滑式轴承的高速领域。

The simple, easy and quick sensor-less control of position and speed has been attainted. At the same time, in order to overcome the shortcomings of low efficiency under high speed with flux-weakening, the control idea of boost under motor status and flux-strengthening under low speed status has been proposed from structure design and performance analysis by using the motor design and transient analysis software of ANSOFT.

同时为了克服永磁同步电机高速弱磁效率低的问题，借助于ANSOFT软件电机设计和瞬态分析工具，从结构设计以及性能分析方面提出了电动时升压和低速强磁控制相结合的控制思想，基本实现了永磁同步电机高速不需弱磁的大范围高效率的运行。

With mechanical and electrical products distributor Eastern Province following brands:"Foshan City, Guangdong Province Star Transmission Limited" mechanical CVT, Worm Gear reducer,-cycloid reducer, high-speed intermittent segmentation;"Zhejiang Province Speed Reducer Factory stars,"the WP, FC models of cast iron Worm Gear Reducer" Zhejiang Huangyan motor plant "the" new turbot "Lvqiao Motors, explosion-proof motor, frequency conversion electrical, brake motors; Nanjing-controlled motor Ltd."Control of the" Iron Motor, YCT speed electromagnetic motor, and other products.

万华机电同东省总代理的产品有如下品牌：&广东省佛山市星光传动有限公司&的机械无级变速器、蜗轮蜗杆减速机、摆线针轮减速机、高速间歇分割器；&浙江省恒星减速机厂&的WP、FC型号的铸铁蜗轮蜗杆减速机；&浙江黄岩电机厂&的&新菱&铝壳电机、防爆电机、变频电机、刹车电机；南京控特电机有限公司的&控达&铸铁电机、YCT电磁调速电机等产品。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。