极值问题 meaning in English
extreme value problem
extreme-value problem
extremum problem
Examples
- What is called optimization design just extracts a satisfactory solution with the help of computer ; this process should pass through several steps which employ the decisions of optimization variables , an established mathematical model , the confirmation of some initial design parameters , and optimization design method , most important of all
工程优化的基本任务就是要解决函数在某一区域上的极值问题,其一般过程可总结为: ( 1 )选取优化变量, ( 2 )建立数学模型, ( 3 )确定初始设计参数, ( 4 )最后利用某种优化方法求出优化结果。 - This chapter is devoted to the exposition of the basic theory of quasiconformal mappings , of the development and the research situation of the theory of extremal quasiconformal mappings and the theory of schwarzian derivatives ( including nehari families and the extremal set of schwarzian derivatives ) . the main results of this ph . d . dissertation are briefly introduced in this chapter
在这一章中，我们简单介绍了拟共形映射的基本理论，拟共形映射极值问题、 schwarz导数理论(包括有关的nehari族与schwarz导数的极值集)的发展历史与研究现状，并对论文的主要结果给以简单介绍。 - Based on modern optimization theory and optimal control theory , this dissertation studies some questions as follows : 1 . the optimization model of parameter identification of three - dimensional geologic history numerical simulation , algorithm and its application geologic history numerical simulation is a basic content of basin numerical simulation , and the porosity is the major parameter in the evolution and development process of oil - bearing basin . according to the sedimentation and burial mechanism , the physical and chemical principles of oil geology , the mudstone porosity ' s non - linear parabolic partial differential equation has been established
本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1 、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。 - In this paper , a generalization of a traffic problem is discussed . it has been proved that this problem is equivalent to a problem of permutation optimization . a system of necessary conditions for the optimal solution is given . an approximate algorithm is designed , and some open problems are proposed
研究一个车队探险问题的推广,证明了这个问题等价于一个置换极值问题,得到了最优解的一组必要条件.设计了一个近似算法,并提出了若干公开问题,且对一般的置换极值问题做了初步讨论 - The theories of multi member function ' s extremity value , hooke jeeves mode searching method solving wholly complex problem of extremity value and uniformity design method , one new and efficient method to choose test point , are applied to establish the two - dimension oil well orbit optimized model . the shortest length of oil well orbit curve is regarded as this model ' s object and all kinds of effecting parameters are analyzed
通过引入多元函数极值理论、求解复杂极值问题的hookejeeves模式搜索法及一种较为新颖和高效的试验点选择方法：均匀设计法，建立以最短油井轨迹曲线长为目标的二维油井轨道优化设计模型，并对影响井轨迹曲线的参数进行了较为详细的分析。