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For the Riemann boundary value problems for the first order elliptic systems , we translates them to equivalent singular integral equations and proves the existence of the solution to the discussed problems under some assumptions by means of generalized analytic function theory , singular integral equation theory , contract principle or generaliezed contract principle ; For the Riemann-Hilbert boundary value problems for the first order elliptic systems , we proves the problems solvable under some assumptions by means of generalized analytic function theory , Cauchy integral formula , function theoretic approaches and fixed point theorem ; the boundary element method for the Riemann-Hilbert boundary value problems for the generalized analytic function , we obtains the boundary integral equations by means of the generalized Cauchy integral formula of the generalized analytic function , introducing Cauchy principal value integration , dispersing the boundary of the area , and we obtains the solution to the problems using the boundary conditions .

对于一阶椭圆型方程组的Riemann边值问题，是通过把它们转化为与原问题等价的奇异积分方程，利用广义解析函数理论、奇异积分方程理论、压缩原理或广义压缩原理，证明在某些假设条件下所讨论问题的解的存在性；对于一阶椭圆型方程组的Riemann-Hilbert边值问题，利用广义解析函数理论、Cauchy积分公式、函数论方法和不动点原理，证明在某些假设条件下所讨论问题的可解性；广义解析函数的Riemann-Hilbert边值问题的边界元方法是利用广义解析函数的广义Cauchy积分公式，引入Cauchy主值积分，通过对区域边界的离散化，得到边界积分方程，再利用边界条件得到问题的解。

Furthermore, it can be changed into singular integral equations with Cauchy kernel by introducing Sherman transformation. Then , the numerical example of the elastic welding problem with symmetric cracks is given, and the stress intensity factors can be obtained.

通过应用平面弹性复变方法，把满足已知边界条件的弹性平衡问题转化为解析函数的边值问题，再通过引入Sherman变换，把边值问题化为Cauchy核的奇异积分方程组。

In Chapter 4, on the basis of introducing the theory of linear operator semigroup and the Cauchy problem in Hilbert space, this dissertation has researched the method on solving solution of distributed parameter system, and the model estimation and optimal control of the nonlinear distributed parameter system.

本文第四章在介绍线性算子半群理论及希尔伯特空间中的柯西问题的基础上，研究了分布参数系统的近似解求解方法，一类非线性分布参数系统的模型辩识和最优控制等问题。

In this paper,we study the Cauchy problem of nonlinear Klein-Gordonequations By introducing a family of potential wells, we not only give a threshold resultof global existence and nonexistence of solutions, but also obtain the vacuumisolating of solutions.

本文研究了以下非线性K1ein-Gordon方程的柯西问题通过引进一族位势井，不仅得到了该问题解的整体存在性与不存在的门槛结果，而且也得到了解的真空隔离现象。

Then, a correlation of liquid thermal conductivity with the heat of vaporization was derived by introducing the cell theory for liquids .

将所得模型结合统计力学理论，导出了液体的导热系数与蒸发潜热间的关系，对40种有代表性的物质(569个点)的关联，误差仅为1。

After introducing the wireless cellular network positioning technology in general, this paper elaborates TDOA wireless positioning technology.

本文首先对蜂窝网移动定位技术进行了全面的介绍，其中对本文所采用的TDOA无线定位技术进行了重点阐述。

If your account has been introduced to CFC by an Introducing Broker, the IB is an

如果您的帐户是由介绍中介人介绍给CFC的， IB是一个独立的公司，不是CFC的代理人。

Introducing the all new Chaise Him and Chaise Her chairs.

介绍所有新贵妃他和贵妃她的椅子。

The system of fueling pipeline ,in particular, the branch form pipeline system with pump deliver,one side, the form of pipeline is multiplicity,on the other hand, the working state is changefully,so,the working state of the system must be adjusted and controled, the paper contraposes the system, investigating the method of adjusting and control,introducing several pressuered-control valv

注油管路系统，特别是多分支的泵送管路系统，一方面管路结构形式多样，另一方面工作状态多变，因此，在系统工作中均需对工况进行调节与控制。

So, this thesis, by introducing the main content of technology and researching the application of IT project management mainly, has shown the using value and functional characteristic of the Network Program Technique in IT project management practice.

所以，本论文主要通过对IT项目网络计划技术的主要内容及其应用的研究，展示了网络计划技术在IT项目管理实践中的应用价值和功能特点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。