结构方程

From the point of view of application and manufacture,some theoretical researches on the magnetic actuator with permanent magnet on housing are carried out,and the direct-coupled models of magnetic fields for analysis and for calculation are presented.The static and dynamic characteristics of the models and the movement equation of the plunger are also discussed.

从研制及应用的角度出发，对高压断路器永磁操动机构进行了理论研究，介绍了永磁机构的基本结构及工作原理，给出了用于分析和计算的耦合磁场模型，研究了磁场模型的动静态特性以及动铁芯的机械运动方程。

Then a solution of CAD/CAM of the camis put forward. The following work has been completed. Based on analysis of transmission, structure and profile formation principle of thecam, the basic kinematic formula of the gear indexing cam mechanism isdeduced. Furthermore the space meshing contact equation of cam profile and theroller is formulated.

在此基础上提出了弧面分度凸轮的CAD/CAM解决方案，论文得到如下主要结论：在对弧面分度凸轮传动形式、结构和廓面成形理论分析的基础上，推导出了弧面分度凸轮机构的基本的运动学公式，凸轮廓面与滚子的空间共轭接触方程。

The model of couping platform system and simulation based on OMT were also given.

通过详尽的动力学分析为平台台体推导出完整的运动方程，并对此进行线性化处理，进而根据实际结构建立了系统模型框图，最后，采用面向对象建模技术对系统进行了计算机仿真。

The first part of this paper goes to a thoroughreview of studies on methods for nonlinear least squares problems, which are then,from the perspective of arithmetic design, classified into five major types: methodsbased on quasi-Newton equation, hybrid methods, factorized quasi-Newton method,trust-region methods, and self-scaling method. The second part of this paper turns thefocus toward a type of new algorithms for nonlinear least squares problems based onnew quasi-Newton equation.

本文的前半部分通过对非线性最小二乘各种求解方法的回顾，从算法设计的角度将求解方法划分为五大类：基于拟牛顿修正的方法，混合法，分解拟牛顿法，信赖域算法以及具有乘积结构类算法，本文后半部分给出了基于新拟牛顿方程的一类求解非线性最小二乘的新算法。

The soliton hierarchies associated with the modified second order polynomialeigenvalue problems can be factorized into the commuting x- and 〓-constrainedflows, the r-matrices and classical Poisson structures for the x- and 〓-constrained flows are constructed.

与修正的二阶多项式特征值问题相联系的孤立子方程族可以被分解为相互交换的x-和〓-约束系统，本文求出了约束系统的r-矩阵和经典Poisson结构。

With these identities, fermion mass and bound state spectra are obtained, and in terms of gap equation phase structure is discussed.

这种方法是从对称性的角度出发，通过正规顶角之间的Ward-Takhashi恒等式来研究费米子质量的动力学产生和束缚态的质量谱，利用能隙方程来讨论体系各种可能的相结构。

In Chapter Two, we introduce the Dirac Fermion as the low energy excitations of the graphene, based on the field theory. We then discuss two-dimensional honeycomb lattice in the nearest-neighbor tight-binding model.

在第二章里，我们研究最近邻紧束缚模型下的二维蜂窝结构的电子态，然后讨论对应的场论模型，即一维Dirac Fermions 模型，最后引出有效质量方程。

And the texture characters of flow canals.

推导出了描述热液管流上侵动力学特征的柏努利方程关系式，表明热液的流速与所处构造压力差、流体的性质，以及流动通道的结构特征有关。

The properties of guided waves are sensitive to the internal structure of reservoirs. So, guiled waves may be used to provide an effective tool for reservoirs description and monitoring the process of hydrocarbon producton.

导波特性对储层内部结构与岩性十分敏感，它有可能作为储层描述和采油过程监测的有效手段，本文针对三层简单波导模型进行了频散方程及曲线的计算，并进行了人工合成槽波记录的研究。

In the last part of this dissertation, the subsurface temperature and salinity equations are added to investigate the development of the inversion process. The effects of the temperature inversion on MLD and thermal structure of the upper ocean are also discussed.

本文最后加入次表层海水温度、盐度控制方程，通过相应的数值试验，讨论了次表层温度反升现象的产生和消亡过程，并对次表层温度反升现象对混合层深度和混合层内温度结构的影响进行了初步的探讨。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。