查询词典 combinatorial

The problem of set partitions in combinatorial mathematics is conside-red, and the following three points are emphasized:(1) the non-recursivealgorithm for computing the number of partitions of an N-Set, P;(2)the algorithm for mapping the partition vector V to the partition sequencenumber D;(3) the algorithm for mapping the partition sequence number Dto the partition vector V.

本文对组合数学中的集合划分问题进行了一些探索，试图回答下面三个问题：①集合划分方法数P的非递归算法，②划分向量V映射到划分序号D的算法，③划分序号D映射到划分向量V的算法。本文以划分的构造树为基础，加以变换，得到数目树和分块树，由此求得P，以及K块划分方法数P_K。

So it has been an open problem and the front of Operational Research and Combinatorial Optimization.

车辆优化调度问题已经成为运筹学与组合优化领域的前沿与研究热点问题。

In chapter 1, we introduce basic definitions and notations of combinatorial optimization, scheduling problems and algorithm, worst-case ratio.

第一章简要介绍了组合优化问题、排序问题的基本概念与算法和最坏情况分析的简要介绍。

Using combinatorial thoughts and topological methods,a closed curve system that contains the most number of non-contractible,pair-wise disjoint and pair-wise non-homotopic closed curves on the orientable surface is investigated.

利用组合数学的思想、拓扑的方法研究在可定向曲面上，一类含有个数最多的不可收缩的、两两不相交、互不同伦的圈系统及其性质，得出了关于这些圈的一些拓扑定性性质，并给出这些圈在曲面上的位置分布。

Structural identification ; parametric identification ; particle swarm optimization ; combinatorial optimization

结构辨识；参数辨识；粒子群优化算法；组合优化

On the basis of common GM(1,1) model and by means of establishing residual error periodic extensional model, the authors extract predominant period and reconstruct a new data sequence; then after superposing the values of the same time in different period, a ray-periodic extensional combinatorial model is built.

提出了灰色–周期外延组合模型，即在一般灰色模型GM(1，1)的基础上建立残差周期外延模型，并提取优势周期以重新构造新的数据序列，再将不同周期同一时刻的值叠加。

The orbits of the point stabilizer of a finite permutation group are called the suborbits of the permutation group. The determination of the suborbits of a permutation group is one of the basic problems in the permutation group theory. It plays an important role in the study of combinatorial structures.

一个有限传递置换群的点稳定子群的轨道称为该群的次轨道，决定一个置换群的次轨道结构是置换群理论的基本问题之一，它在组合结构的研究中有着重要的应用。

There, he and his colleagues devised a scheme to marry photolithography, a technology used in semiconductor fabrication, to combinatorial chemistry.

正是在那，他与他的研究人员一起将用于半导纤维的技术-影像平面印刷技术与组合化学嫁接到了一起。

After the primal problem being transferred into a combinatorial optimization problem, genetic algorithm is designed to solve it.

原问题转化为组合优化问题后，采用遗传算法进行求解。

The main goal of this dissertation is to develop and analyze interior-point algorithms and their variants for solving semi-definite, quadratic, combinatorial and nonlinear optimization problem that arise in production management, resource allocation, communication networks and computer science.

本文主要讨论和分析了内点算法的基本理论和基本思想，并将其推广来求解一般的半正定规划、二次规划、组合优化以及非线性规划问题，这些问题在工业生产管理、资源分配、网络通讯和计算机技术等领域中是会经常碰到的。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。