问题分析法

In the past, there exists difficulty for calculating nearly singular integrals arising from boundary element analysis of the problems of thin body. However, by now, the difficulty of nearly singular integrals has been resolved by analytical integral algorithm, which has been put into uses in analyzing the conventional structures and thin body structures in the potential problems.

过去边界元法求解薄体结构存在着几乎奇异积分的困难，目前几乎奇异积分问题已得到成功解决，解析积分算法也已成功应用于分析二维位势问题常规结构和薄体结构。

We are the first in China to apply the recent " universal variables " concept to the orbit designing of deep space probe .

给出了利用普适变量法来求解飞行时间，开普勒问题和高斯问题的计算方法，将这些方法用于深空探测器的轨道设计，针对不同要求提出了 3种改进设计的方法，对每种方法的适用范围进行了详细的分析。

In this paper the characters of MA model and the trust region method are analyzed, a subproblem with MA model and trust region technique is presented, and a projected gradient method is use.

本文分析了MA模型和信赖域方法的特点，构造了MA模型信赖域子问题，并利用投影梯度法进行求解，在此基础上提出了一个新的求解非线性规划问题的MA模型信赖域方法。

These work are mainly based on two assumptions: one is called as the Deeg-Pak assumption, i.e., the crack is assumed to be an impermeable slit and thus the electric field inside the crack is equal to be zero; the other is called as the Parton assumption, i.e., a crack is treated as a permeable cut across that both the normal components of electric displacement and the tangential component of electric field are continuous.

裂纹问题：对于压电介质内的裂纹问题，近十年来人们已做了大量的理论分析工作，这些工作主要是基于两种假设：一种称之为 Deeg-Pak 假设，即假设裂纹为电非渗透的，因此裂纹内的电场等于零；另一种称之为 Parton 假设，即假设裂纹为电渗透的，且跨越裂纹上下表面电位移的法向分量和电场的切向分量是连续的。

In the numerical study, the governing equations of flow and heat transfer in 3 —D body—fitted curvilinear coordinate system being automaticly generated with TTM method were deduced by means of vector and tensor analysis. These equations were dliscreted with nonstaggered grids providing relative elimilating method for the pressure oscillation was domonstrated.

在数值分析中，借助于矢量理论和张量分析，导出了具有普遍意义的三维任意曲线坐标系下的流动传热控制方程，并利于TTM方法生成了计算域的贴体曲线坐标网格；在数值离散过程中，尝试了用非交错网格离散的方法并解决了压力场振荡的抑制问题；运用附面层理论，阐述了壁面函数法在三维任意曲线坐标系上的应用。

It has been proven that the textural information can be used to classification by means of test.

本文首先分析了遥感影像分类方法和纹理提取方法的研究现状，接着对地统计学的基本原理进行了论述，在这一理论的基础上，对变差函数应用于遥感影像的纹理描述和提取进行了论证和实验说明；并就一些具体应用问题如计算窗口大小、计算方向和计算步长的选择等问题进行了讨论，提出了一种自适应的确定纹理计算窗口大小的方法；同时，在现有算法的基础上提出了一种新的纹理计算方法――加权变差函数法。

By applying one couple of unit force on two suspension centers based on 3D FEM to calculate their relative displacement, coefficient of torsion displacement, the radial gate s torsional rigidity coefficient is derived; and its stress distribution is analyzed to solve radial gate s torsion problem.

基于空间有限单元法，对闸门吊点施加1对单位力计算出2个吊点的相对位移———闸门扭转挠度系数，进而推算出闸门抗扭刚度系数和单位位移下的应力状态，据此最终解决弧门的扭转问题。并通过某一工程实例的分析计算，表明该方法在生产设计中具有较好的实用性，可以有效地解决弧形闸门的扭转计算问题

Beginning with wave equation, the paper has deduced the propagation of gauss pulses in single mode fiber and fiber grating transmission compensation. The characteristics of cascaded phase-shift gratings are discussed by numerical simulations of coupled-mode theory and T-matrix method. The experimental works and measurement results are shown in this paper. On the other hand, we have introduced the basic theory of EDFA and figured out the characteristics for EDFA at different conditions by numerical simulation. Some experimental results for EDFA are also presented here. In this article, you can find the influence on Optical Fiber Amplifier by Gain Tilt, especially, the negative effect on CSO in CATV transmission system.

论文首先从波动方程入手，对高斯脉冲在单模光纤中的传播演化及光纤光栅透射补偿进行了详细的研究；较系统地介绍了光纤光栅的耦合模理论，并将传输矩阵计算法用于计算级连相移光纤光栅的光学特性；重点介绍了作者在光纤光栅刻制及特性测量方面所做的一些实验研究工作；较系统介绍了EDFA的基本理论，计算出各种条件下EDFA的光学特性，并进行了一些实验研究；综合分析光纤放大器对光纤传输系统的影响，特别分析了光纤放大器增益不平坦对光纤CATV系统中CSO恶化的原因及其解决方法，并研究了光纤布拉格光栅在稳定980nm泵浦源输出功率和输出波长方面的应用；结合一个基于光纤光栅和光纤放大器的光纤用户接入网方案，对光纤用户接入网的若干问题进行了理论与初步的实验研究。

To solve the difficulties of digital integral that exist in global optimization of redundant manipulators, this paper discussed how to build up dynamic equation, the inner relation between constraints and unconstraint optimum control problems, then a digital method solving optimum control problems is deeply analyzed.

为了解决冗余度机器人全局法优化中数值求解的困难，本文讨论了动力学方程的建立、无约束和有约束最优控制问题之间的内在联系，重点分析了求解最优控制问题的数值方法。

By means of finite element-topological optimization method,firstly,the structure static analysis for the moving platen of injection molding machine was analyzed with hyperworks software.the stress distributions were obtained veraciously,and then the structure of the moving platen was optimized according to the variable density method.the best scheme of material distribution was proposed.the design stiffness of the product was improved;the aim of lightweight for the structure was also achieved.the process of...

采用先进的有限元-拓扑优化方法，应用hyperworks软件对注射机移动模板进行结构静力分析，准确获得应力分布，并按照变密度法对其进行结构优化，提出了移动模板材料的最佳分布方案，不仅提高产品设计刚度，还达到结构轻量化的目标。该分析及优化过程对目前应用较广的箱式模板设计具有重要的工程参考价值，能有效地解决工程设计中的实际问题。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。