查询词典 combinatorial problem

Based on the principle of variation, boundary value problem of pressure partial differential equation was transformed into the extreme value problem of fonctionelle and finite element equation of flow model was deduced for calculating the simulation result.

根据变分原理，将压力微分方程的边值问题转化为泛函的极值问题，建立了渗流模型的有限元方程。

The method can convert OPF problem into unconstrained extreme value problem using intellectual optimizing characteristics. The PSO algorithm is used in the searching, which has the parallel processing characteristic is easy to realize, and can enhance robustness and effectively improve the global convergence performance and calculation accuracy.

该方法利用智能优化理论将最优潮流问题转化成一个无约束极值问题，该算法具有并行处理特征，鲁棒性好，易于实现，能够有效的提高算法的全局收敛能力和计算精度。

On the basis of analyzing detailedly the correlative conclusions of the extreme value problem of two variable Function , this paper extends the essential condition and sufficient condition to multi-variable function by using the Taylor Formula 、Quadratic Form 、Hesse Matrix and so on,and gives a method to judge the extreme value of point whose vice-derivative doesn't exist by utilizing Lagranges theorem ,so that compensates for the blank above ,which turns idea that solve the extreme value of multi-variable function problem one by one into realities.

摘要本文在对二元函数极值问题的相关结论进行分析的基础上，用泰勒公式、二次型、海赛矩阵作为工具，将二元函数极值的必要条件和充分条件推广到多元函数的情形，而且还利用拉格朗日中值定理找到了一个判别不可导点处极值的方法，从而弥补了多元函数不可导点处极值无法判断的空缺。因而，使得用穷举判断的方法来解决多元函数的极值问题这一思路成为现实。

Bring forward a kind of learning algorithm fitting on the base of spline function, because the spline function has good flexibility and quadratic smoothing property, the search problem of network weight functions training can be converted into the resoluting extreme value problem of the plurality function through using spline function to represent network input and link weight functions, thus the PNN can be trained with the help of the existing neural network learning algorithms;④build a kind of learning algorithm base on the alternate of Walsh function, the complexity of network computing can be decreased through using the complete orthogonality of Walsh function corollary.

应用结果表明该算法收敛速度快，稳定性好；③提出了一种基于样条函数拟和的学习算法，由于样条函数具有很好的柔韧性和二次光滑性，将网络输入函数和连接权函数用样条函数的形式表示，可把网络权函数训练的函数寻优问题转换为多元函数求极值的问题，从而可借助于现有的神经网络学习算法训练过程神经元网络；④建立了一种基于Walsh函数变换的学习算法，利用Walsh函数系的完备正交性，可大大降低网络计算的复杂度。

In chapter2 we obtain the constructure theorem and intechange theorem of 2-tournaments.wefind the correlation between the number of 3-cycles and 2-cycles in 2-tournament andits score vector,discuss a class of extreme value problem of tournament,answer partlya open problem posed by Brualdi.

第二章讨论了2-竞赛图和竞赛矩阵的一些基本问题：存在性和结构问题，证明了具有相同得分向量的任意两个2-竞赛矩阵可以通过三角形转换而互相得到，得到了2-竞赛图中2-圈与3-圈的数目与得分向量之间的关系式；讨论了2-竞赛中的一类极值问题，部分地回答了Brualdi〓的一个问题。

People are talking about problem beteew south and north is very extrude, I think it a develop problem.

人们都在讲南北问题很突出，我看这个问题就是发展问题。

With the developing of economic and improving of society, the energy supply problem and environment pollute problem becomes more and more extrude.

随着经济的快速增长和社会的全面进步，我国的能源供应和环境污染问题越来越突出。

Like reforming outside the system in our country,we research the economic development in the minority region outside the system,that is winding out the minority factor.after the latent capacity of extensive increasing gives play to,the minority factor becomes impassable furtherly in the economic development of minority region,because it can not solute the problem that how to mix the minority factor with the problem of the economic development in minority region,the academic circle sinks into the passive condition of application and countermeasure study,adapt to this learning dilemma,the minority region is at a late-developing stage,ignoring the minority factor imitating simply the development and industrial model of the developed region is a fairly universal selection of economic development, Adapt to the selection.,On the development policy in the minority region,A high premium comes to be placed on the tilting of the policy and helping of the economic things.

与我国体制外改革相类似，长期以来我们对民族地区的经济发展也是"体制外"及绕开民族因素进行的，这种发展模式在粗放增长的潜力得到发挥之后，民族因素成为民族地区经济进一步发展不可逾越的因素，由于无法解决如何融合民族因素和民族地区经济发展的问题，学术界陷入应用研究和对策研究的被动局面。

Nowadays, the urban environment's problem that we fall across is in the final analysis the problem of human.

目前国内外遇到的城市建设的问题，归根结底就是人的问题。

But, when the problem scale is getting larger, the number of feasible solutions provided by constraint programming is also getting too huge and it very difficult to solve the whole problem with a reasonable computation.

但是当问题范围增大时，限制规划求解的困难度也随之增加。因此，期望这项问题可以作为未来研究限制规划求解人员排班问题的一个改进方向。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。