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As the conventional method of moment has some disadvantages in geometrical modeling and computational work, the high order MoM and bilinear surface technology are used in studying the scattering electromagnetic characteristics of dielectrically coated conducting targets.

针对传统量法(method of moment, MoM)几何建模复杂、计算量大等缺点,采用高阶量法和双线性表面技术对涂敷目标的电磁散射问题进行了研究。

A method is also provided for reducing axial space within a dual-input clutch transmission having a torque converter, including providing an on-axis transmission pump with a housing and rotor set, providing a torque converter with a rotatable hub which is drivingly connected to the rotor set for powering of the transmission pump, and mounting the dual-input clutch to the pump housing for support.

还提供一种方法以减少带变器的双输入离合器变速器的轴向空间,包括提供带有壳体和转子组的同轴变速器泵,提供带有可旋转毂的变器,所述可旋转毂以驱动的方式连接到转子组以为变速器泵提供动力,并且将双输入离合器安装到泵壳体上以支撑。

Because of lots of space voltage vectors are used impliedly to compose this algorithm, the THD of motor phase current, the ripple of stator flux and torque are lower, and then the drive system torque response can be more quick.

在此基础上分析多相感应电机矢量控制系统和直接转控制系统的稳态机械特性和动态转过渡过程,用来全面分析、比较这两种高性能控制方法的性能,研究二者的内在联系。

It has nonreciprocity similar to that of ferromagnet on condition that the external magnetic field is parallel to magnetic lattices, and the dispersion relation of the antiferromagnet has nonreciprocity , too.

通过计算和讨论得到了当外磁场沿x轴方向,原磁晶磁沿z轴方向,波矢沿±y轴方向时,反铁磁质表面磁极化激元的极化与铁磁质在平行于磁晶磁的外磁场下的极化相类似,具有非对易性,且其色散关系也具有非对易性。

The main function of the system is to accomplish large and overelaborate statistics. Realizing way of statistics is to depend on a series of two-dimensional array,.

统计的实现方法是依靠在数据操作过程中形成的一系列二维陈,以二维陈为基础,迅速得到各种统计数字。

The principle of TDTC and the field-weakening method are introduced. The space voltage vector PWM overmodulation method suiting is adopted. IDTC is extended to the whole speed range. This scheme is proved by experiments.

本文介绍了改进型直接转控制的基本原理,加入弱磁控制算法,同时采用一种适合工程应用的空间电压矢量PWM过调制算法,将改进型直接转控制扩展到全速度范围。

Watermark is inserted into perceptually significant Krawtchouk moments of original, and watermark based on Krawtchouk moments is local.

水印信号嵌入到图像的低阶Krawtchouk中,这种基于Krawtchouk的水印算法是局部水印技术。

The experimental method are established to determine the tortuosity factor. The SPSR method and the computer system are used to get the one-step origin quadrature and the two-step center quadrature. Parameter evaluation is also used to calculate the tortuosity factor.

本文建立了催化剂曲折因子的实验测定装置,用SPSR法,应用计算机采样系统,得到脉冲应答曲线的一阶原点和二阶中心,结合参数估计的方法,计算了XNC-98甲醇合成催化剂的曲折因子。

Permanent Magnet Synchronous Motor drived by triphase sinusoidal current is research object in this paper . Its mathematics models in several coordinate are set up , controlling principles of flux linkage and torque are discussed under DTC and the block diagram of PMSM with DTC is presented.

本文以三相正弦波驱动的永磁同步电机为研究对象,建立了其在不同坐标系下的数学模型,并深入探讨直接转控制中永磁同步电机的磁链和转的控制思想,给出控制方案。

Permanent magnet synchronous motor drived by triphase sinusoidal current is research object in this paper. Its mathematics models are set up and the different control menthods are discussed, controlling Principles of flux linkage and torque are discussed under DTC and the block diagram of PMSM with DTC is Presented. At last the control mothod is proved correct using MATLAB simulation software.

文章以二相正弦波驱动的永磁同步电机为研究对象,建立了永磁同步电机的数学模型,对于不同的控制策略进行了对比分析,并深入探讨直接转控制中永磁同步电机的磁链和转的控制思想,给出控制方案,最后利用MATLAB仿真工具验证了控制方案的正确性。

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The split between the two groups can hardly be papered over.

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