矩

The Hankel transformation method has been used to turn the basicdisplacement equations and displacement-stress constitutive equations intoa system of first order non-homogenous ordinary differential equations inwavenumber domain,and by us of the matrix method,the transfer matrix ofthe medium layered is established.

利用Hankel变换，将轴对称静力问题的位移基本方程和位移应力本构方程转化为波数域内非齐次一阶常微分方程组，利用矩阵法，建立了介质层的传递矩阵，导出了层状弹性半空间轴对称静力问题奇异解的一般解析表达式。

The harmonic torque of a novel kind of brushless DC motor is studied in this paper.

本文对一种新型无刷直流电动机的谐波转矩进行了研究。

The optimal model of hedging based on the partial moments reflects the asymmetric attitudes on the loss and gain of the hedger.The model changes the phenomenon of the present research assumption that attitudes on the loss and gain of the hedger is symmetry.

偏矩套期保值优化模型反映了套保者对赢得和损失的非对称态度，改变了现有研究大多认为套保者对赢得和损失的态度是对称的不合理的现状。

The tolerance of dynamic preloaded drag torque is an important parameter in the quality verification of helicoid.

动态预紧转矩是检验丝杠螺旋面质量的重要参数，为了满足ISO3408-3：1992和GB/T17587。

The equations for the helicoid and cross section of a ballscrew are worked out and a numerical integral method for the computation of the moment of inertia of the cross section is proposed.

建立了滚珠丝杠的螺旋面方程及横截面方程，提出一种精确计算滚珠丝杠横截面惯性矩的数值积分法，计算结果表明，传统的简化方法将造成20％以上的计算误差。

With the development of various technologies such as motor control, Vector Control and Direct Torque Control appear one after the other. Hereinto, VC is been applying broadest for it's excellent performance.

随着交流电机控制等各种技术的发展，矢量控制和直接转矩控制等高性能调速系统相继出现，其中矢量控制以其优良的性能成为目前实际应用最为广泛的调速方法。

Colleagues asked if his homespun ways and rustic accent befitted the leader of Germany's oldest political party .

同僚们想知道这位中规中矩且乡音浓重的家伙能否配得上德国最为古老的政党。

For verifying the proposed approach, the EEG potential simulated from current dipoles in an ideal homogeneous medium are generated. The localization discrepancy and the moment orientation discrepancy are used as index for measuring the estimation accuracy.

为了验证这里所提出方法的正确性，脑波模拟讯号是由电偶极在理想的均匀介质头颅模型下所得到；定位偏移量及偶极矩方向偏移量两参数被用来当做估计值准确度的指标，另外，初始值估计法的偏移量分布可用数学中的珈玛方程式描述出分布的特性。

Arkeryd [5], then we use the results about moment and entropy given in [6], andprove that there exists a space homogeneous solution in L~1(R~3) to this equation withunbounded collision frequency.

Arkeryd紧性方法[5]的启发，根据[6]中给出的熵与矩的结果，在碰撞机率无界的情况下，证明了线性半导体Boltzmann方程在L~1(R~3)空间中存在均匀解。

From the view of torque controlling strategy, the relation between the torque controlling strategy such as the electric current feedback method、 PWM open loop method etc and the vehicle driving way is analyzed firstly, then the conclusion could be drawn that the PWM open loop method has more advantages than the electric current feedback method when they are both used in the same vehicle which is direct driving by hubcap motor. Secondly, based on the electric motor mathematic model and its experiment, a new permanent brushless dc motor phase electric current detector method in which a digital signal processor and single current sensor are used is introduced.

从转矩控制策略角度来看，分析了电流反馈法以及开环PWM电压调速控制方法与车辆的驱动方式关系，得出了电机驱动电压受限的情况下，无论是从对车辆的动力性能影响还是从对车辆的驱动要求来讲，开环PWM电压调速控制方法较电流反馈法更适用于以轮毂电机直接驱动方式的两轮电动车中；其次，根据电机的数学模型以及电机试验波形，提出了一种利用数字信号处理器以及单个电流传感器检测三相永磁无刷电机电枢电流的新方法，这种方法具有较强的适应性、实时性，它可以根据控制系统的要求，适时地提供所需电流数据，是目前许多文章关于无刷电机相电流平波的重要技术基础。

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。