查询词典 combinatorial closure

The maximum clique problem is one of the classic NP-complete problems from combinatorial optimization.

最大团问题是组合优化中的一个经典的NP-Complete问题。

Thus, each cell population displays a vast heterogeneity in patterns of mono- and biallelic gene expression, providing numerous combinatorial patterns of gene expression.

因此，每个细胞群在单一和等位基因的表达模式上显示出巨大的差异性，提供了基因表达的许多组合模式。

An improved artificial neural network model of lowpass filter with combinatorial nonperiodic defected ground structures is developed in this paper.

采用一种改进的人工神经网络反向传播算法，将动量方法和可变学习速度的BP算法结合，并且在每个样本点更新权值和偏置值，这种算法称为动量VLBP算法。

Artificial neural network ; Backpropagation algorithm ; Combinatorial nonperiodic defected ground structures ; Momentum variable learning rate backpropagation

神经网络；反向传播算法；组合式非周期性缺陷接地结构；动量VLBP

As Norbert Wiener showed in 1952, feedback circuits, in all their combinatorial variety, are the fountainhead of control and self-governance.

正如 Norbert Wiener 在1952年已经表明了的，反馈线路，以及各种反馈线路的组合，是控制和自我管理的源头和本源。

In the last section, we characterize the combinatorial schemes in terms of rank, nullity and derivative functions.

第7节根据秩函数、零度函数和导出函数刻画了组合概型。

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。

World War II: Battle of Saipan - Americans take Saipan.

1944年的今天，美国在塞班战役中拿下塞班岛。

When the scorner, the rejecter of truth, has become presumptuous; when the routine of work in the various money-making lines is carried on without regard to principle; when the student is eagerly seeking knowledge of everything but his Bible, Christ comes as a thief.{DA 635.3

当讥诮和拒绝真理的人，到了任意妄为时，当追求财利者罔顾按道义经营谋利时，当学人正在兢兢业业地研究各种知识，而单把圣经丢在一边时，基督要像贼一样来临。