查询词典 cascade amplification

Based on the mechanism of secondary flow formation and development in a turbine cascade, SINE function and polynomial function were applied to develop a non-axisymmetric endwall profiling method.

根据叶栅内部二次流形成和发展的机理，应用正弦函数和多项式函数建立了一种叶栅非轴对称端壁成型方法。

Mercury alone is not the cause of all of these symptoms, but it is the spark that sets off a cascade of damage in the body.

单凭汞不是所有这些症状的原因，但它是引发体内一连串损害的火花。

To the bad nonlinearity and coupling of the power station boiler superheated stean temperature,It is very difficult to gain excellent control with the traditional PID cascade method and the.

常规的电站锅炉汽温控制系统一般为串级PID系统，然而大型电站锅炉的动态特性有明显的分布参数特性、非线性及较强的藕合性，一般很难得到非常满意的控制结果。

This invention relates to a cascade multiple zero-type matrix rectifier, in which, a general input filter is connected between a net and a step-down transformer to get sine-wave input current, the step-down transformer includes n secondary windings with Yn spliced mid lines, the phase of all the three-phase windings is the same, the rectifier array is arrayed in a 1 row x n lines by n zero-matrix rectifier units, each line of which is connected with the seconday winding of the step-down transfornmer, and the outputs of the rectifier units are serial orderly to form a DC output, the general controller is responsible for regulating work of the entire system and connected with the branch controllers by signal cables to control the work of the rectifier units in the array.

本发明涉及一种级联多重化零式矩阵整流器，总输入滤波器连接在电网与降压变压器之间，滤波得到正弦波形的输入电流，降压变压器有n个Yn接带中性线的次级绕组，所有三相绕组相位相同，整流器阵列由n个零式矩阵整流器单元排成1列×n行的阵列，阵列中每一行与降压变压器的一个次级绕组对应连接，阵列中整流器单元的输出依次串联，形成一路直流输出，总控制器负责控制调节整个系统的工作，并通过信号电缆与各个分控制器联络，控制整流器阵列中每个整流器单元的工作。本发明由低压小功率的变换器串联得到幅值可调的高压直流电源，同时在电网侧得到位移为零的输入电流，具有网侧四象限运行能力等优点，适用于中高压直流供电领域。

The cascade prerotation regulator was used in the blower for the hot-blast stove in The No.2 Ironmaking Plant of Jinan Steel to overcome the narrow range of frequency control of motor speed and not suitable adjustment in low speed area.

济钢第二炼铁厂热风炉风机应用叶栅预旋调节装置克服了变频调速范围窄、不宜用于低转速区调节的缺点，既满足了生产的需求，还节电30%左右，节能效果显著。

I love my family real estate company that the house in 2003 with the Beijing Second, the three-tier market, the gradual development and perfection, it will gradually form the three major consumer cascade system, that is, from low-cost, public housing sublease, general residential leasing, public housing the right to use interchangeable, Gongfang have the right to use indemnity

我爱我的家庭的房地产公司，房子于2003年，北京二，三级市场，逐步发展和完善，将逐步形成三大消费级联系统，即从成本低，公共房屋转租，一般住宅租赁，公共房屋的使用权互换，公房的使用权转让补偿

A novel robust design method of cascade control system is proposed for the reheated steam temperature control system of 300MW power-unit in Yuanbaoshan Power Plant. The method successfully solves the problem that the design of main loop and subloop interact each other and the parameter of the controller is difficult to be tuned.

本文所作的主要工作如下：结合带偏置的继电反馈辨识方法和基于期望幅相裕度的整定方法，设计了一个简单有效的、易被工业过程采用的自整定PID控制器。

A simplified model of wet steam equilibrium flow past cascade of arbitrary airfoils on general surface of revolution is presented.

提出了一个通过任意谈成面叶棚的湿蒸汽平衡态流动的简化模型。

Furthermore, the fan blade was stacked renewedly. And then, the influence of blade sweepforward, sweepback and bend on the cascade flutter was discussion.

本文还在三维风扇叶片的基础上对叶片重新积叠，讨论了叶片前掠、后掠以及弯曲对颤振特性的影响。

Then the first tendril s of the grapes, swelling from the old gnarled vines, cascade down to cover the trunks.

多节的老葡萄藤长出了新的卷须，像瀑布似的披撒了下来，裹住了主干。

More than three hundred secondary school students competed in the thirty-eighth International Physics Olympiad last month in Iran.

300多名中学学生上个月在伊朗参加了第38届国际物理奥林匹克竞赛。

He criticised me because I couldn't finish the work in time.

他因我没及时完成工作而批评我。