法的理论

The asymptoticbehavior of two ecological systems and the unconditionally stability and oscillations in kinds of 4-order delay difference equations are investigated by using analysis method, constructing Lyapunovfunctions, the logarithmic norm, charateristic roots theory and the bifurcation theory. Here, theasymptotic properity includes the uniform persistence, the global attractability of the solutions,the asymptotic stability of the positive solution local or global and the oscillations of solutions.

本文利用定性分析的方法、比较原理、特征值分析法、对数范数、构造Lyapunov函数及分支理论等方法和理论，研究了两类生态模型解的渐近性及一类四阶时滞微分方程解的无条件稳定性，其中包含模型的一致持久生存性、正平衡态的全局吸引性、局部和全局渐近性以及解的振动性等问题。

However,authors still do not find the relevant references on convergence and symmetric problems of the semi-analytical solution.Based on the semi-analytical solution for Hamilton canonical equation theory,the formulations of the clamp and simply supported and symmetric boundary conditions on the Hamiltonian element are derived by the variational principle.Several numerical examples show that with increase of meshes,the convergence rate of the semi-analytical solution is faster than the convergent rate of traditional finite element method based on displacement.

①在厚度上没有任何位移和应力模式的假设，由于传递矩阵方法的引入，从理论上讲，不受板壳厚度或层合板壳层数的限制；②采用弹性力学的Hamilton正则方程半解析法，可以克服边界的局部化效应[8]；③由于在平面内或圆柱壳的曲面内采用了有限元法，所以一般的板壳问题不受结构侧面边界条件的限制，在复杂工程板壳问题上具有广泛的应用领域。

Under the Middle Ages scholar's influence,German scholars began to adopt systematic method and explained causa according to the sprit of that time.

到了德国法上，受中世纪学者的影响其开始以体系化的方法和符合时代精神的态度重新解释罗马法上的契约原因理论，形成了奥托·贝尔的无因债权理论和温德莎伊德的原因论。

Spectral element methods for partial differencial equation is introduced in this study from viewpoint of the collocation approximation of Chebyshev polynomial. Wave Equation and its space discretization are deduced. Two time integral methods, central difference method and implicit Newmark method, are introduced, and their stability and applicability are also discussed in some details. The significance of absorbing boundary conditions in spectral element methods for Aeroacoustics is explained, and Clayton-Engquist-Majda absorbing boundary conditions is emphasized and introduced, then the discrete scheme of this boundary conditions is deduced and applied to spectral element methods for wave equation.

本文从Chebyshev多项式逼近理论出发，详细介绍了谱元方法求解偏微分方程的过程；推导了流体中的声波动方程并在空间上对其进行了谱元离散；详细讨论了两种时间积分方法──中心差分法和Newmark方法，分析了它们的稳定性条件，并从理论上对比了两种方法的优缺点和适用范围；将吸收边界条件推广应用于谱元方法求解气动声学问题中，重点介绍了Clayton-Engquist-Majda吸收边界条件的原理和公式，推导了该吸收边界条件的变分形式，并将其引入波动方程的离散形式中。

In this thesis, we will mainly do research on the novel scheme for Digital image Steganography, Digital Image Secret Transmission in network and the development of the information hiding device for application. The main contributions of this thesis are as following: The novel conversion method for mapping image to complex number is proposed, and the plus, minus, multiply and complex conjugate operation of image are defined based on Positional number systems and complex number system. Following new results have been gotten: 1 The suitable complex number basis to be used to express integers is a big set. 2 Any image can be mapping into a one-to-one point. 3 Lots of image processing problem can be considered based on geometric theory.

在本论文中，研究工作集中在数字图像伪装算法的新模型、图像在网络中的加密传输的新方案和信息伪装设备的研发等三个方面，主要包括：基于位值制记数法和复数系理论，提出利用复数作为基底的数字图像新的表示方法，用复数运算定义了图像和图像间的"加"、"减"、"乘"、"共轭"等运算关系；得到理论结果： 1、能表示任何整数的复数基是很大的一个集合。2、任何一幅图像，都能和复平面上的一个点一一对应。3、可以将图像问题化归为平面几何问题处理。4、复数系下的图像表示适合用于信息伪装。

The main findings were as follows: 1. The results revealed that the conjunction of agreement and inconsistency among family members was found in a family. The phenomenon showed that in " the sameness has the differentness" and between "the differentness has the sameness", and it is the special result of system measurement. 2. It proved the system theory including "one adding one are not two", existence of subsystems. 3. Every family member has different perception to the same dyad relationship, so the subject should use the units of whole family, including father, mother, and one child or more. 4. The same members of this family had different perception to different dyad relationship, so the content of instrument should include different dyad. 5. In regard to analyzable methods of family system, the variance is between family members, and it is not adaptation to using average method and variance method.

主要结果包括：第一研究姿现成员问同时具备「一效性」与「不一致性」的现象，此种「同中有异」、「异中有同」的特性，反映出系统圳量时的独特之处；第二，验证家庭系统中的不等加性、家庭整体性并不能成功的被验证，但验证次系统的存在、以及验证次系统之问具有关连性等系统理论；第三，在划量对象上，结果姿现不同成员间的差异的确存在，故进行家庭系统测量之测量单位应以「整个家庭」为单位，故划量对象应包括父、母、子三者甚至更多，所获得的资料亦更接近系统性也更加丰富；第四，不同成员对於不同次系统知觉之分化内涵不同，故必须将不同次系统分开利量；第五，在家庭系统分析方法上，不同成员问观点之差异性是确实存在的，而不适合使用「平均数法」与「差异数法」处理系统资料。

In chapter 2, a finite element model for the composite sandwich plates is developed, based on the Zig-Zag deformation assumption and the first order shear deformation theory, and the finite element buckling analysis governing equations for the plates under mechanical, thermal and/or thermal-mechanical mixed loads are deduced respectively. By Von-Karman nonlinear deformation relations and Total Lagrange formulation, an incremental governing equation for postbuckling analysis is established and a corresponding effective computational scheme is presented..

第二章首先建立了基于Zig-Zag截面变形假定和Mindlin一阶剪切理论的夹层板有限元分析模型，分别推导了夹层板机械力、热载和热—机械力耦合屈曲分析的有限元列式和相应的屈曲前以及屈曲临界状态的平衡方程，基于Von-Karman大挠度理论，采用增量形式的全局lagrangian法推导了复合材料夹层板增量形式的几何非线性有限元离散平衡方程，给出了一种有效的非线性平衡方程的迭代求解格式。

D. Methods In this dissertation, I adopt many research methods. a. Combine criterion analysis with demonstration analysis The demonstration analysis is the base of criterion analysis. In the research on regulation policy, value judgment is indispensable. So, I combine criterion analysis with demonstration analysis in this dissertation. b. Combine theoretic model with experience research Game theory can combine the theoretic model with experience study very well.

静态分析与动态分析相结合不同国家的对比需要进行横断面的静态对比，而竞争发展与产业组织的演进则是动态的，需要二者结合起来，但还是要以动态分析法为主，因为产业组织理论发展至今，为了与现实情况更接近，对多人、多期、双向动态决策的动态分析已成为产业组织理论的主流。

As the development of hydromechanics and the computer science,the optimized design method of ship lines based on the theory of hydromechanics has gradually become practical.

随着船舶流体力学理论的不断进步，计算机技术的飞跃发展，基于流体力学理论的船体线型最优化设计已经被欧美、日本、韩国等造船技术先进的国家用于实际的船型设计中，而我国目前的船舶设计部门仍主要采用传统的经验设计法来进行船体线型设计。

As a result of the veneration paid by the Shiites to the family of Ali and Fatima (belief in the infallibility of the Imams is obligatory on all Shiites), doctrines of incarnation have sprung up within these sects, which join to the theory of the legitimate imamate the belief that the possessor of this dignity becomes super human; and this belief is even carried to the point of recognizing the existence of God-men.

"由於崇拜支付的什叶派穆斯林家庭的阿里和法蒂玛（相信犯错误的伊玛目是强制性对所有什叶派穆斯林），理论的化身，涌现出在这些教派，其中加入理论的合法伊斯兰教长认为，这一拥有尊严成为超级大国人；和这个信念甚至进行到了承认存在"上帝的男人。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。