矩

The experimental results indicate that collectivity of ^131 Ce is reduced relative to that of ^130Ce and it follows that deformation decreases with increase of the neutron number on the basis of systematic comparison of transition quadrupole moments for the light cerium isotopes.

精确量度形变大小的最好方法是通过测量能级寿命提取电磁跃迁概率或跃迁四极矩。为了系统研究轻Ce同位素的形状变化，我们利用多普勒移动衰减法测量了^131Ce激发态的寿命。

Finally, analysis and discussion in dynamic stability of nipper mechanism show that instable regions become wider with speed increasing and the chief factor determining motion stability of nipper mechanism is its first two modes which can be changed by adjusting the ratio of the length and inertia.

最后利用该参数平面分析了钳板机构的稳定性，分析表明，随着速度的提高，不稳定区域越来越宽；影响钳板机构稳定性的主要原因是机构的前两阶模态，可以通过调整构件的长度比、惯性矩比来提高钳板机构运动稳定性。

It is similar with normal induction motor with high efficiency and power factor while operation with the adoption of parallel star-shape connection and nonparticipation of appended interspaced resistor. During starting stage the adoption of unique serial triangle connection with the participation of appended interspaced resistor improves the starting performance with the character of low start current and high start torque.

它正常运行时，采用并联星形连接，使得中间附加电阻不参与运行，其运行性能类似于普通感应电动机，具有较高的效率和功率因数；而在起动时，采用独特的串联三角形连接，使得中间附加电阻参与运行，相当于转子电阻增加，从而有着起动电流小、起动转矩高的优良的起动性能。

Based on a 5th-order model and the electromagnetic characteristics of an induction motor, we prove that the coefficient matrix is nonsingular, confirming the existence of the inverse decoupling control of stator flux and torque in any conditions.

本文从异步电动机的5阶模型及其固有的电磁特性出发，证明了其系数矩阵的非奇异性，进而结合逆系统理论证明定子磁链与电磁转矩的逆解耦在任何状态下都是存在的。

Based on chapter two, In chapter three, the method of multiple scales is introduced to the study of the multiple-dimensional nonlinear stochastic systems under random external excitation. Using method of multiple scales, we strictly deduce the equation of modulation of amplitude and phase. The effects of random excitations are analyzed; numerical simulations verify the results. Theoretical and numerical simulations show that when the intensity of the random excitation increases, the nontrivial steady state solution may be changed from a limit cycle to a diffused limit cycle.

在第二章基础上，第三章将多尺度法引入到相应的随机系统的研究中；严格推导了系统的约简方程，用矩方法求出稳态解应满足的方程，获得一些结果；并且数值模拟结果与理论推导的结果是一致的；并注意到，与其对应的确定性系统相比较，系统响应从周期解变为近似周期解，系统的相轨线从极限环变为扩大的近似极限环；随着激励带宽的增大，此扩大的近似极限环的宽度将增大。

But it is difficult to get satisfied control characteristics by using normal linear proporition integral controller due to the high nonlinearity between speed and current or torque.

但它的转矩和转速之间具有强烈的非线性关系，采用常规线性PI控制器难以得到令人满意的控制特性。

In this study, a moment method improved by the third-order normal transformation polynomial for practical slope reliability analysis with random variables having unknown distributions is discussed.

5在实际的结构或岩土工程中，有学者提出用变量正态化转换多项式解决仅知道变量前几阶统计矩的可靠性分析问题。

Structure of the nucleon magnetic is as important as, and closely related to, the structure of the nucleon spin.

核子磁矩的问题是十分重要的问题，因为它直接和核子的自旋结构紧密联系在了一起。

Simulation results show that it can improve the systems performance with low torque ripple, using the null vector rationally.

仿真结果表明，正确地使用零电压矢量能够有效减少转矩脉动，改善系统性能。

This method is easier to numerate implementation than the traditional time domain method of moment.

与传统求解时域电场积分方程的时域矩量法相比，该方法易于数值实现。

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。