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Two kinds of fluids including liquid crystal and the mixture of liquid crystal and dibutyl sebacate were injected into the micro motors with four different structures of electrodes respectively.The renational corves between the rotate speed of the rotor and the voltage were got,and a series of conclusions o...

分别将单体液晶和单体液晶与癸二酸二丁酯的混合液体注入具有4种不同电极结构的微马达，得到了8条转子转速与电压的关系曲线，得出了转速与电压、液体种类、电极结构等关系的一系列结论。

The flow field and performance of a helicopter ducted tail rotor in hovering and sideward flight were analyzed using CFD technique.

采用CFD方法分析在悬停和侧飞时直升机涵道尾桨的流场与性能。

In the slewing mechanism,the key is the rotor support.

在回转机构中，关键是回转支承。

The thesis illustrates the principle of the and its application in the system, establishes the simulation model of the vector control system of PMSM based on the EKF and successfully realizes the application of the speedless sensor in motor control. Firstly, based on the mathematic model of permanent-magnet synchronous motor, the PMSM vector control system is built. Secondly, the Extended Kalman Filter is designed for the on-line estimation of the speed and rotor position by only using measurements of the motor voltages and currents.

首先，基于PMSM的数学模型，建立了电机的矢量控制仿真模型；其次，设计了扩展卡尔曼滤波器，通过检测电机端电压、相电流对电机转速和转子位置进行在线实时估计，实现了PMSM的无传感器矢量控制；最后，在Matlab7.0环境下进行的系统仿真试验表明，该方法具有优良的转角跟踪特性和较好的转速跟踪特性，同时系统具有较强的抗负载扰动性能和较佳的控制性能。

Geometric parameters mainly include the clearance between rotor and stator, the spirochetal length, the threads number of the stator, etc.

本文考察的几何参数主要有定子转子间隙、螺旋体长度和定子螺纹头数等，此外还对不同螺纹齿形的泵进行了研究。

There are two cases to define the failure. One is the rotor system can not to strit over the critical speed, and the other is arising the bistable characteristic.

并定义了两种失效的情况，一是转子系统过不了临界转速，二是出现双稳态特性。

This paper firstly synoptically introduces the development history of rotor concrete damp sprayer, working principle, and analyzes the advantage and the disadvantage of the present models, then determines the model of this design.

本论文首先概括性地介绍了混凝土喷射机的发展历史、工作原理，并分析了现有机型的优缺点，接着确定本次设计的机型。

This paper firstly synoptically introduces the development history of rotor concrete damp sprayer, working principle, and analyzes the advantage and the disadvantage of the present models, then confirms the model of this design.

本论文首先概括性地介绍了混凝土喷射机的发展历史、工作原理，并分析了现有机型的优缺点，接着确定本次设计的机型。

This paper firstly synoptically introduces the development historyof rotor concrete damp sprayer, working principle, and analyzes theadvantage and the disadvantage of the present models, then confirmsthe model of this design.

本论文首先概括性地介绍了混凝土喷射机的发展历史、工作原理，并分析了现有机型的优缺点，接着确定本次设计的机型。

This paper firstly synoptically introduces the development historyof rotor concrete damp sprayer, working principle, and analyzes theadvantage and the disadvantage of the present models, thendetermines the model of this design.

本论文首先概括性地介绍了混凝土喷射机的发展历史、工作原理，并分析了现有机型的优缺点，接着确定本次设计的机型。

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％。