1) principal conjunctive normal form
主合取范式
1.
Both the principal conjunctive normal form of simple disjunction and the principal disjunction normal form of simple conjunction are expressed as the digital form in this paper.
本文对简单合取式的主析取范式及简单析取式的主合取范式作了数字形式上的表示 ,在一定程度上简化了自然推理系统 P。
2) CNF
合取范式
1.
When the constraint expression of a query is not a CNF (Conjunctive Normal Form),it is generally transformed into an equivalent DNF (disjunctive normal form)an union of CNFs .
当数据立方查询条件不是合取范式时,一般是将它转化成为若干合取范式的并的形式(析取范式)。
3) conjunction normal form
合取范式
1.
The satisfiability of conjunction normal form(abbreviate SAT problem) is a typical NP-complete problem.
合取范式可满足性问题(简称SAT问题)是典型的NP完全问题,本文引入了一个饱和子句集的新概念,利用饱和子句集的特性,研究了SAT问题的复杂性,证明了SAT问题复杂性为多项式的一个充分条件,并揭示了二元可满足性问题与三元可满足性问题的本质差别。
2.
The satisfiability problem of conjunction normal form (abbreviate SAT problem) is an NP_complete problem.
合取范式可满足性问题(简称SAT问题)是一个NP完全问题。
3.
Let F be the conjunction normal form(CNF formula),Ci be the clause of F in classical propositional logic system.
用F表示经典命题逻辑的合取范式(CNF)公式,Ci为F中的子句。
4) conjunctive normal form
合取范式
1.
Proceeding with both-branch proposition,the paper provides the characteristics of both-branch fuzzy logic and both-branch fuzzy logic expressions,Disjunctive Normal Form and Conjunctive Normal Form of both-branch fuzzy logic expressions.
从双枝模糊命题入手,给出双枝模糊逻辑的性质和双枝模糊逻辑公式,以及双枝模糊逻辑的析取范式与合取范式。
2.
A simplified method is given in practice: on the one side, it extracts the differential elements to construct conjunctive normal form from the information table.
实际应用中给出一种简化算法:一边从信息表中提取差别元素构成合取范式,一边用分配律、吸收律作逻辑公式的等价变换,直接得到最小析取范式。
3.
Since the computational complexity in converting conjunctive normal form into disjunctive normal form is exponentially graded,therefore,in order to simplify the computational complexity,a surface-based DNA algorithm for the conversion of normal form transforming into disjunctive normal form is put forth.
合取范式化为析取范式的计算复杂度是指数级别的,为了降低它的计算复杂度,提出了合取范式化为析取范式的DNA表面计算。
5) main disjunctive normal form
主析取范式
1.
Seeking the main disjunctive normal form mainly includes the following four methods,the truth table method,the deductive method,the main disjunctive normal form using the truth table method to seek the G,and the main conjunctive normal form using the deductive method to seek the G.
求主析取范式包括真值表法、推演法以及用真值表法求G的主析取范式、用推演法求G的主合取范式等四种方法。
2.
Taking into cousideration that traditional main disjunctive normal form is complicated,through a discussion on the suffix features of miniterm,by using the binary,the author offers a binary calculating approach to main disjunctive normal form determined by disjunctive normal form.
针对解决求主析取范式的传统方法比较繁琐的情况,通过对极小项下标特征的讨论,利用二进制给出了由命题公式的析取范式确定主析范式中的二进制求法,从而简化了由繁杂的命题公式推演或真值表计算求主析取范式的计算过程,给出了求命题公式主析取范式的简便求法——表格法。
6) principal disjunctive normal form
主析取范式
1.
In this paper, through the use of the disjunctive normal form and the principal disjunctive normal form, we propose some general algorithms concerning the grand minimal dominant set, the minimum dominant set, the minimal edge dominant set, and the minimum edge dominant set of graphs.
给出了利用命题逻辑公式的析取范式和主析取范式求图的全部极小支配集和最小支配集以及全部极小边支配集和最小边支配集的一般算
补充资料:合取范式
合取范式 conjunction normal form 命题公式的一种标准形,设A是一个命题公式,A中出现的命题变元为p1,p2,…,pn,以Qi表示pi或7pi,i=1,…,n。称Q1∧…∧Qn是p1,…,pn的一个合取项,若干个互不相同的合取项的析取称为一个合取范式,与命题公式A逻辑等价的合取范式称为A的合取范式。例如命题公式p→(q→r)的合取范式是 p∧q∧r∨[p∧q∧r∨p∧[q∧r∨[p∧[q∧r∨[p∧q∧[r∨p∧[q∧[r∨[p∧[q∧[r。一个命题公式的合取范式可以通过真值表得到,也可以通过等价变换得到。命题公式还有另一种范式,析取范式。析取范式的定义与合取范式对偶,只要把合取与析取对换就可以由合取项得到析取项,由合取范式得到析取范式。 |
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参考词条