导出

From the concept of winding inductance、 magnetic linkage and the store coenergy, this paper deduces the quantitative relationship between motor speed, n, reluctance torque and winding's voltage, Us, and investigates whether it is correct or not through tests.

分析了开关磁阻电动机的一种调速方法——调压调速；从绕组电感、磁链及磁共能的概念出发，导出调压调速方式下电机转速n，磁阻转矩M及绕组端电压US之间的定量关系，并通过实验验证了三者之间关系的正确性；给出适合于开关磁阻电动机调压调速系统的8098单片机使用PID数字控制器的控制算法，最后介绍2。

Besides this, the calculation of magnetic energy and electromagnetic torque of SCLRM is deduced by virtual displacement principle, and the physical essence of the electromagnetic torque is also analyzed in detail.

利用虚位移原理推导出了SCLRM中的磁场能量和电磁转矩的计算方法，并详细分析了电磁转矩产生的物理本质。

The magnetostriction theory of amorphous alloy is introduced, the calculated formulas of magnetic field and magnetostriction is investgated and verified by experiment ...

介 绍了非晶态合金的磁致伸缩原理，导出了磁场、应力、测量方向任意时碰致伸缩与磁场的计算公式，并经试验证实。

A unified model is established to investigate dynamic interactions between major locomotives fypes and the track.

文中建立了主要类型的机车－轨道统一模型；导出了弹性及刚性轴悬式电机驱动机车动力学微分方程；采用新型。。。

From nine-value set operations,especially the operation of convert mapping between sets,various cubetab les have been derived directly.

通过九值集合运算，特别是集合的逆映射，直接导出各种立方表，然后同D 算法一样，对故障的测试立方进行D 驱赶和一致性相交运算，求出故障的测试。

The theoretic results on conventional theorems are far from the experiment results. Through discussing on ABA mapping, we obtain the general collage theorem and local collage theorem for ABA mapping.

本文从分析ABA映射的Collage定理入手，导出了ABA映射的广义Collage定理和ABA映射的局部Collage定理，并提出了符合实际情况的概率模型。

Moreover, the text deduced the computing formula of application qualification of the marl roof based on the rain time and the marl infiltration speed for water.

而且，根据水对泥土的渗透速度和降雨时间，导出了覆土屋面适用条件的计算公式。

In this paper, the basic options as a starting point, the approach of assuming the price of the underlying assets comply with the conditions of normal distribution, we discuss the options buyers were portfolio probability and loss function benefits the mathematical expectation of a meaningful result is derived.

本文以基本期权为起点，在假定基本资产期日的价格遵从正态分布的条件下，讨论期权组合的购买者获益的概率及其损益函数的数学期望，并导出一个有意义的结果

Speed is a derived concept defined mathematically in terms of length and time.

速率是一个导出的概念，在数学上是用长度和时间表示的。

Then, the equation was changed into the standard form of the Mathieu equation using Galerkin method.

首先在载流薄板的磁弹性非线性运动方程、物理方程、几何方程、洛仑兹力表达式及电动力学方程的基础上，导出了载流薄板在电磁场与机械荷载共同作用下的磁弹性动力稳定方程，然后应用Galerkin方法将稳定方程整理为Mathieu方程的标准形式，并将薄板的动力稳定性问题归结为对Mathieu方程的求解。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。