子模型

The paper has a modularization analysis of ship electrical propulsion system. The paper develops the simulating mathematical model of every subsystem. It includes the thrust and torque of screw propeller, the resistance and re-torque in the movement of ship.

本文对船舶电力推进系统进行了模块化分析，建立了船舶运动中螺旋桨推力、扭矩，船舶运动的阻力，偏转的阻转矩等不同功能子模块的数学模型。

We take sech form ansatz and solve the CNLS equations through variational approach. We obtain the analytical expression of nonlinear coupling term, which is in the lagrangian of CNLS. We apply a potential well model to analyze the interaction properties of self-trapping beams in detail, the results show that the interaction do not change the profile of the beams, two beams keep oscillating around their collective center periodically. The amplitude and period of this oscillation are both determined by initial separation of two beams.

我们采用Sech函数为试探函数，用变分法求解CNLS方程，（1）给出了CNLS方程所对应的拉格朗日中的非线性耦合项的解析表达，（2）利用势阱模型详细分析两自陷光束之间相互作用的特性，结果表明，相互作用没有改变孤子的形态，它们分别在与传播方向垂直的方向上绕它们的公共中心做往复振动，振动幅度及周期都取决于两光束的初始分隔。

ABSTRACT The researches on the dynamic mathematical' model and self synchronization closed loop operation of a PM hybrid step motor system are presented.

本文以永磁感应子式步进电动机系统为对象，对其动态数学模型和自同步运行方式进行了深入的研究和探讨。

For the parameters of physical interest, the self-consistency also diminishes the continuum part of the spectral functions.

对于π-ω模型，自洽效应对耦合常数有很大的依赖性，随着〓的减小自洽后的重子谱函数先增大后减小。

Finally, by applying the semigroup theory, the existence and uniqueness of local solution are proved.

最后，利用算子半群理论，证明了形状记忆合金模型局部解的存在唯一性。

The method of concentrate mass and Lagrange multipliers were used to build the dynamic model of moving the rope on a sheave.

采用集中质量的方法，建立了一种新型的曳引绳绕行运动的动态模型，并通过Lagrange乘子的引入将曳引轮的运动作为约束条件施加在绳子上。

A new mathematical model of intelligence test paper generation system was set up. To avoid slow-convergence and local convergence of simple genetic algorithm, a kind of improved genetic algorithm was proposed in this paper.

建立了一种新的试卷矩阵数学模型，提出了改进的遗传算法编码方式，并通过改进初始群体的产生方法和遗传算子，有效提高了遗传算法的收敛速度，并较好地避免了局部收敛现象。

The left singular vector of the projection has been tracked by the projection approximation subspace tracking algorithm. Then the modal parameters are obtained by least square method. At last an experiment is made using a cantilever beam to prove the efficiency and stability of the method by changing the frequency band of the exciting signal.

通过子空间跟踪算法，不断跟踪计算投影的左奇异值向量，再利用最小二乘法求出系统的模态参数，最后用悬臂梁作为实验模型，通过不断改变系统激励的频带范围，验证方法的有效性及稳定性。

Secondly, the limitations of the average soliton model are discussed.

第二章对平均孤子通信模型作了总结和研究。

In this model the basic buildingblocks are Majorana fermions in the spinor representation of -dimensional quantum space-time with a gauge symmetry G■■=SO×SU ×U A×SU F.

在这一模型中，物质的基本组元为维量子时空中旋量表示的Majorana费米子，其规范对称性是GMD=SO×SU ×U A×SU F。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。