结构方程

The major research includes the following three points. First, using finite element method, the influence factors on propagation properties for PMF couplers are analyzed, including the shape of coupler cross-section, the taper of coupler bipyramidal and the angle deviation of the birefringent axes.

基于热-结构-电磁多物理场耦合有限元方法，分析了保偏光纤耦合器的传输特性和耦合系数在熔锥区的变化规律，从而求解耦合模方程，得到偏振光经过耦合器后的光功率分布，继而对保偏光纤耦合器的性能参数分光比、消光比及附加损耗进行理论分析。

In this paper, we first introduce the concepts and structures of generalized per-symmetric matrix, generalized centro-symmetric matrix or generalized bisymmetric matrix.

本文介绍了广义广对称矩阵、广义中心对称矩阵以及广义双对称矩阵的概念及结构，研究了这些特殊矩阵集合中，矩阵方程AXB=C及矩阵方程组A_1XB_1=C_1，A_2XB_2=C_2的迭代解法，同时考虑了相应的最佳逼近问题。

We give different kinds of iterative methods of some quaternion matrix equations,and using structure-preserving property for complexification operator of the quaternion matrices,which analysis and character the convergence of various algorithms.

给出了若干类四元数矩阵方程的多种迭代算法，并利用四元数矩阵复表示运算的性质与保结构特性，分析和刻画了各种算法的收敛性。

The results are as follows:The relationship between the precipitation and the stemflow is a linear regression. The stemflow of six forest types is Broadleaf forest, Conifer and broadleaf forest, Cupressus funebris forest, Mixed conifer forest, Pinus massoniana forest and Shrubbery and grass land in order.

结果如下：树干茎流量与降雨量成线性相关，回归方程达到极显著水平；6种森林类型的树干茎流量从大到小依次为阔叶林、针阔混交林、柏木林、针叶混交林、马尾松林和灌草地；不同树种间的树干茎流量差异极显著，影响树干茎流量的主要树体特征因子是冠型结构、胸径和平均冠幅。

Mathematical model of the cavity of three-tipped cycloidal pump was established, and the structure and characteristics of the novel three-tipped cycloidal pump were analyzed.

论述了三尖摆线的形成及其参数方程，并付其特性进行了研究，建立了三尖摆线泵型腔的数学模型，分析了新型三尖摆线泵的结构和特性。

This paper discusses the structure and algorithm of dynamic neural network, and use this dynamic network to predict the response of Duffing equation and a real structure in different input conditions.

讨论了动态神经网络结构及其算法，然后利用所设计的动态神经网络对杜芬方程和一实际结构在不同输入条件下的响应进行预测。

The relaxation modulus, the relaxation time spectra and the structure parameters C 1 and C 2 in the WLF equation were derived from the dynamic mechanical temperature spectra of the cationic dyeable PET fibres after heat setting.

对热处理的阳离子可染改性涤纶测得的动态力学温度谱，求得松弛模量，应力松弛谱以及WLF方程中的结构常数C1和C2，分析了试样超分子结构的变化，说明了热处理工艺改善纤维可染性的机理。

By designing three hierarchical factors of "corporate governance characteristics","medium agent characteristics" and "corporate basic characteristics", we applied a more integrated and systematic approach to study the influencing factors. Besides, our hierarchical regression analysis has more explanative effects.

在影响因素的研究上，设计&公司治理结构特征&、&中介机构特征&、&公司基本特征&三个层面因素，并通过具体指标予以计量，较以往内部控制信息披露研究方面单个指标的设计，更为综合考虑和系统分析，并运用层次回归方法深入分析因果关系，相对一般信息披露研究中的普通线性回归对各个因素的作用效果分析更为清晰，回归方程具有一定的解释能力。

In the second part, the theory of numerical simulation is introduced, including description of body configuration, elastic-plastic large deformation constitutive equation and finite element formula. It is followed by the derivation of equation from the basic theory of elastic-plastic deformation. The solution to temperature field, thermal stress, thermal strain, equivalent effective stress and equivalent strain is achieved then. In addition, we exposit the relation between machine load and thermal load in coupling analysis.

介绍了物体的构形及其描述，弹塑性大变形的本构方程、有限元列式；并进一步论述了弹塑性变形的基本理论，推导了弹塑性方程组；阐述了温度场的求解、热应力及热应变的理论概要，说明了等效应力与等效应变，并进一步阐明了在热力耦合分析中，机械负荷与温度负荷之间的关系；此外，还简介了Marc AutoForge程序结构的特点。

For Lienard equation 〓,we decision the existenceof periodic solution and almost periodic solution from the composition of fand g.

对于特殊的二阶Lienard方程〓我们主要从f和g的结构判别周期、概周期解的存在性。

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％。