查询词典 hydraulic drive

Control and scheme selecting of the electric drive control system of electric drive oil drilling rig have been deeply studied in this paper.

针对电驱动石油钻机电气传动控制系统的构成、控制、方案选择进行了深入研究。

A suit of electric drive control system of electric drive oil drilling rig is developed with market and user request.

针对市场需求及用户实际使用情况，研发了一套电驱动石油钻机电气控制系统。

The main improvement of this ultra PC if compared to previous models is a new kind of solid state drive with 48GB capacity instead of Ye Olde Hard Diske Drive.

主要改善这种超便携式电脑相比以前的型号是一种新型的固态硬盘与48GB的能力而不是叶Olde硬Diske驱动器。

ABSTRACT The researches of this thesis are carried out around the development of high performance machine tool spindle permanent magnet synchronous motor and its drive system. Five parts are included: First of all, concerning the operating characteristics of the machine tool spindle drive system, the optimum current control strategies of spindle PMSM are determined; The design rules of spindle PMSM's key parameters are summarized, based on the study on the influences of the design parameters on the performances of the PMSM operating at different current control strategies; The practical methods to improve the flux-weakening ability of the PMSM are presented; Based on the analysis and comparison of the operating performances of PMSM with different rotor structures, a novel PMSM rotor structure, which is of excellent mechanical performance, suitable for fluxweakening operation and can improve the torque output capacity in the same time, is presented.

本文围绕高性能机床主轴永磁同步电动机及其传动系统的设计研究展开，所做工作主要包括五部分：首先，确定了主轴永磁同步电动机定子电流的最优控制策略；通过对不同控制策略下主要设计参数对主轴永磁同步电动机性能影响的计算研究，总结了参数设计规律；提出了永磁同步电动机弱磁扩速的实用措施；在分析比较不同转子磁路结构电机的性能，尤其是弱磁扩速能力的基础上，提出了一种机械性能优越，易于弱磁扩速，同时能保证电机恒转矩运行时的转矩输出能力的新型转子磁路结构。

Based on the analysis, according to the proposed classifying methods and the operating characteristics of the off-road vehicle, driveline configuration with combination of traction forces of the parallel hybrid drive system has been selected as the drive scheme of the CFA6470HEV hybrid electric off-road vehicle.

研究了混合电动汽车驱动系统的4种分类方法，对每一种分类方法中包含的各种类型的混合电动汽车驱动系统的结构特点进行了分析，对国内外一些典型结构的混合电动汽车进行了研究，在此基础上，根据提出的分类方法以及越野车的运行特点，选取分路式并联混合动力驱动系统作为CFA6470HEV混合动力越野车的驱动系统方案，车辆的各项性能都达到了预定的目标，证明所选取的方案是合理的。

By now, I don't know why I'm thinking of Freud, in his controversial paper, Beyond the Pleasure Principle, he asserted human's pleasure comes from two aspects of our instincts, the Libido Drive and the Thanatos Drive.......

我想到了弗洛伊德，在他备受争议的《快乐原则之外》一文中，他声称人类的快感来源于自我本能的两个方面，性的冲动以及对于死的渴望。。。。。。。

We found that in the case of neglecting magnetic shear, the plasma current also can be driven by the shear Alfvén wave and the circularly polarized wave, respectively, the efficiency of current drive in the rotation plasma is independent of the plasma density In addition, it is found that whether m=0 or m≠ 0, the effect of the magnetic shear on the compressional Alfvén wave current drive makes the efficiency be dependent on the plasma density and inversely proportional to it.

当考虑旋转效应而不考虑磁剪切效应时，等离子体平板模型下平面极化压缩阿尔芬波能够驱动旋转等离子体电流，驱动效率也与等离子体密度无关，却与旋转大小成正比，这与Avinash[Phys Plasmas 4，2204（1997）]的结论一致。我们发现在这种情况下剪切阿尔芬波和圆偏振阿尔芬波都可以驱动旋转等离子体电流，旋转效应引起的电流驱动与密度无关。

The hardware consists of a Power Take-off Unit in the front final-drive that transmits engine torque through a prop-shaft to the Rear Drive Module.

硬件方面包含装在前面的PTU，他能透过传动轴给予RDM决定传送多少扭力。

An instantaneous optimal semi-active control method is put forward. Combined sliding mode control with lyapunov's stability theory, the control weights matrix, which can minimize structural instantaneous energy, is designed. Simulation and shaking table test is conducted to validated the method's effectiveness. To solve combination explosion of controlled structural state encountered in high-rise building control, the semi-active control strategy, which can drive structural state point to reach the sliding mode switching band, is designed by using sliding mode control theory, and genetic algorithm is used to find the optimal semi-active switching to drive the structural state point to sliding mode switching band at prestissimo speed.

提出了一种瞬时最优半主动结构控制方法，利用滑模变结构控制理论和Lyapunov稳定性理论设计使结构瞬时能量最小的半主动控制权矩阵，仿真实例和振动台试验验证了本文所提方法的有效性和实用性；为解决在高层建筑半主动控制中半主动控制器状态组合爆炸的问题，利用滑模变结构控制理论设计在Lapunov稳定意义下使结构在运动状态空间中任一相点于以最快速率到达滑模切换带的半主动控制策略，并用遗传算法找出了最快到达滑模切换带的半主动控制切换组合。

Hereyou should now be greeted with a prompt that you have a new drive,mount the drive and quick format it NTFS or FAT32, give the nameRamDrive.

在这里 ，您现在应该迎接提示您有一个新的驱动器，安装在驱动器和快速格式化NTFS或FAT32 ，使名称RamDrive 。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。