问题求解

The numerical algorithm based on theories of projecting and Laguerre,such as homology,circular points and ω of absolute conic is established,an iterative elimination method is applied to boost the nonlinear problem solving.

通过调和射影及Laguerre定理的推论求解出平面圆环点的共轭虚像，利用平行六面体照片存在的三对圆环点的虚像，构造对无穷远平面绝对二次曲线的像ω的约束，使用辗转相除法求解非线性问题。

The main idea behind these methods is to take advantage of the known state variables and the theorem of addition for linear system without building up a new Jacobian matrix again. But the equivalent computation of algebraic equation must be performed to get state variables corrections. Accordingly, the speed required to model the contingencies is not fast enough to meet the demand of fast contingency analysis under emergency condition, which is proved by several well-known blackouts caused by flow transferring.

但是，这些算法中的大多数是在实时潮流计算的基础上，利用其中间结果和线性系统的叠加原理，直接求解出事故后的状态变量，都需要通过网络方程求解整个网络状态变量的增量，计算量较大，难于满足紧急状态下快速安全性评估的实时性要求，国内外一系列因静态潮流问题引起的大停电事故就是例证。

Then the hybrid boundary value problem is reduced to solve an infinite system of linear algebraic equations. The results are compared both with the calculations from others and with experiment data, and those are discussed.

而后将原来混合边值问题的求解归结为求解无穷线性代数方程组的间题文中将分析计算结果与前人的计算结果及实验数据进行了对比，并对结果进行了分析讨论。

However the computation of the finite element method is very complex when dealing high-dimensional problems. So that in order to solve the multi-variables problems, the alternating- direction method appears. It can lower the dimension.

有限元方法虽然具有高精度的优点，但是在处理高维问题时计算很复杂，因此为求解多变量的复杂问题，出现了交替方向法，可以把多维问题降维，分解成连续解几个一维问题。

For another, reduced-space approaches allow to exploit problem-dependent structure and approximate second derivative information.

简约空间方法适合过程系统优化命题的高维、低自由度特征，并可利用问题结构和近似二阶信息求解，是该类优化命题的良好求解途径。

The method of the grey model solution is an approximate one, though it is effective, and can be applied in solving similar pl...

文中介绍的求解灰色规划解的方法是一种近似方法，但十分有效，可以应用于求解类似的规划问题。

Not only is the method applied in this paper better to solve the iteration between unsteady convection and conduction and the boundary condition problem, but also is a developmental application on forward and backward difference of windward scheme under unsteady condition.

不仅较好地解决了对流换热和导热的迭代求解和边界条件的处理问题，还将迎风格式的向前和向后差分发展性地应用于非稳态求解过程。

On the base of Lord Kelvin point-source solution, the integral of Bessel function, Poisson superimpose formula and boundary element method, we resolve it and obtain the boundary element basic solution.

受求解方法局限性的限制，目前经典渗流力学理论还无法精确求解复杂外边界油藏中生产井层部分射孔问题。

By using Critical Path Method of network planning technique as the tool,this paper studied the properties of float.Based on the above properties,the super-large type project network is simplified as an equivalent simple network,making the incomputable and complex problem a computable and easy one.What is particular is that the work load of computation of the simplified network is largely reduced whatever agrithorm is used.

本论文用关键路线法(Critical Path Method，简称为CPM)网络计划技术作为工具，在机动时间特性研究的基础上，把超大型工序网络化简为等效的简单网络，从而使不可计算的问题转化为可计算的问题，使很复杂的问题转化为比较简单的问题，尤其是利用化简后的网络求解时间-费用权衡问题，无论使用任何一种算法其计算量都会大大减小。

And then the spatial predicates,possibly used in SDMKD from GIS,are analyzed and listed.Subsequently,the formal expression of spatial assoc...

从G IS数据库中挖掘空间关联规则的主要问题是多层、多关系的规则挖掘问题，不同专题图层不同空间对象之间空间谓词的高效计算与存储表达是解决问题的关键；把空间关系非空间化，将连续数据离散化，从而把求解问题转换成布尔型关联规则问题进行讨论，基于此而探讨了一种通过SJI-P表组织空间谓词，然后根据目标对象的概念层级自顶向下、逐层细化的空间关联规则挖掘方法。

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。