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This dissertation analyses the mathematical model of the induction motor and its dynamic behaviour and points out that the key of realizing DSC is to choose stator voltage vectors reasonably according to the request of the flux and torque.

通过对交流异步电动机数学模型及动态形为的深入分析，指出实现直接转矩控制的关键是要根据磁链和转矩的要求，合理地选择定子电压矢量。

The electromagnetic scattering problem is often treated with integral equation and moment of method, and the calculation of matrix element is one of the most important factors that affecting the accuracy and efficiency of method of moment.

电磁散射问题的数值解通常采用积分方程结合矩量法求解，而阻抗矩阵元素的计算是影响矩量法计算精度和效率的重要因素之一。

Firstly, the basic principles of MOM are reviewed, including the selection of integral equations, the choice of basis function and weight function, the solution of matrix equation and so on.

首先，本文回顾了矩量法的基本原理，介绍了积分方程方法的选取，以及快速多极子方法的基础-矩量法的关键技术，例如基函数和权函数的选择，矩阵方程的求解方法等。

Based on the moment matrix and voltage feed, a new definition of eigen-driven model in moment method is proposed, or one element of the array fed with others short.

由矩量矩阵出发，采用电压源馈电模型，提出矩量法中关于本征激励模型的新定义：即阵列中一个单元激励，而其它单元均短路。

Based on the gray level co-occurrence matrix, moment of inertia, entropy, angle second moment of laser speckle, the texture of images is analyzed.

介绍了激光散斑的形成及其统计性质，拍摄大量不同加工工艺、不同表面粗糙度标准样块的散斑图像，基于激光散斑图像的灰度共生矩阵及惯性矩、角二阶矩、熵、相关性4个参量，对图像进行了纹理分析。

It describes the heteroskedasticity character of interest rate by projecting the sample data onto the EGARCH (1, 1) auxiliary model, makes making the covariance matrix as moment conditions and uses EMM to estimate the parameters. EMM avoids the disadvantage of infeasible or computationally intensive of maximum likelihood functions.

通过将观测数据映射成EGARCH(1， 1)辅助模型描述利率行为的异方差特征，以协方差矩阵为矩条件，用有效矩估计方法得出模型参数，避免了最大似然估计法似然函数不可知或难以求积分的缺陷。

Though analysis the dynamic unbalance moment of couple on three ring reducing gear,puts forward the improvement of plan for the bearing liveload.

通过分析"三环减速机"存在的动不平衡力偶矩，对轴承动载荷提出改进方案，将原来的三环三偏心改成三环二偏心，消除动不平衡力偶矩和轴承附加动载荷，以期对"三环减速机"的设计、使用和维护提供有益的帮助。

Since the dipole moment links up the microcosmic structure and the macroscopic performance characteristic, it is very important to calculate the dipole moment of molecules.

偶极矩沟通了分子的微观结构与宏观性能特征，所以进行化合物偶极矩的计算和研究，具有十分重要的理论意义和工程价值。

The two molecules of the permanent electric dipole moment and induced electric dipole moment of the interaction, called induced force.

这两个分子间的永久电偶极矩和诱导电偶极矩的相互作用，称为诱导力。

In this work,we attempt to estimate the dipole moment of finite cubic arrays of particles,in terms of that of particle chains which has been known.

试图通过已知的链的偶极矩确定任意大小长方结构的簇的偶极矩。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。