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Aiming at the problem of equivalent conversion from conjunctive normal form to disjunctive normal form, an effective algorithm was proposed to construct reduction tree based on discernibility matrix.

针对差别矩阵求约简过程中合取范式向析取范式等价转换的难题,提出一种基于差别矩阵构造约简树的有效方法。

Recently,one attribute re- duction definition based on the new information entropy is proposed by some researchers.

经深入研究,我们证明了该属性约简与基于HU差别矩阵的属性约简是等价的,从而给出了基于HU差别矩阵的属性约简的信息观解释。

Calculating the equivalence class U/C and the discernibility matrices size are the two main factors which affect the efficiency of the attribute reduction algorithm based on discernibility matrices.

影响基于差别矩阵的属性约简算法效率的主要因素有计算U/C等价类和差别矩阵的大小。

To solve this problem,the equivalence relation of rough set theory is replaced by an asymmetrical similar relation,and from this relation,an asymmetrical similar matrix is defined,then a new heuristic algorithm with less space complexity that require core and knowledge reduction based on asymmetrical similar matrix is proposed,and an example is given to confirm the validity of the algorithm.

用非对称相似关系代替粗糙集理论中的等价关系,定义了非对称相似差别矩阵,提出了基于非对称相似差别矩阵的高效求核和知识约简算法。该算法无需改变初始不完备信息系统的结构,能直接处理缺省数据。实验结果表明,新算法所获得的决策规则简洁、高效,与缺省值无关。

Results The equivalent matrix equation is derived by the matrix transformation method.The parameter iterative algorithm and the sufficient and necessary conditions for the convergence are given.

结果基于矩阵变换方法导出了矩阵方程的等价形式,并构造出参数迭代格式,得到了格式收敛的充要条件。

For equivalent discernibility matrix has equivalent attribute reduction,the domain is partitioned into compatible and imcompatible elements in this paper.

利用等价差别矩阵具有相同属性约简的思想,将元素对象分割成相容对象与矛盾对象,通过对参与构造差别矩阵的行与列元素进行约简,减少了某些重复计算过程,提高了计算效率。

On the infinite matrix transformations and convergence,first,it presents an equiva-lent form of the famous Antosik-Mikusinski basic matrix theorem.

在无穷矩阵变换与收敛方面,首先指出著名的Antosik-Mikusinski基本矩阵定理的一个等价形式。

The so-called AT-algebras are inductive limits of finite direct sums of matrices over the extension algeras of circle algebra by K, where K is the C~*— algebra of all compact operators on a separable infinite dimensional Hilbert space.

若V_*与V_*同构,且保持单位元等价类;T与T仿射同胚,且同构映射与同胚映射相容,则存在E与E′的同构导出上述同构和同胚,所谓AT-代数即为圆代数通过κ的本质酉扩张的矩阵代数的有限直和的归纳极限,这里κ为可分的无限维复Hilbert空间上的紧算子全体,不变量中的V*为三变元Abel半群,T为迹态空间,[1]为单位元所在的Murray-von Neumann等价类,r_E为连接映射。

Secondly, for a more general matrix equation in composition, we obtain another equivalent condition for the solvability of this equation and give an equivalent characterization to the solution set of the equation.

第二, 对于一般情况下的型矩阵方程,本文给出其可解的另一个等价条件,同时对其解集作了一个等价性描述。

The invariant V (A , [1〓] that we used for unital case is the semigroup of Murry-von Neumann equivalence classes of projections in matrices over C〓-algebras together with the class of the unit.

我们用来分类的不变量(V,[1〓])是A的矩阵代数中所有投影的Murry-von Neumann等价类所成的半群及单位元所在的等价类。

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。