期刊文献+
共找到92篇文章
< 1 2 5 >
每页显示 20 50 100
Some properties of fuzzy positive implicative ideals in a BCK-algebras
1
作者 吴从炘 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2001年第2期168-172,共5页
In this paper, we use the notion of fuzzy point to study ideal and positive implicative ideal in BCK algebras, then we clarify the links between the fuzzy point approach, the classical fuzzy approach and the ordinary ... In this paper, we use the notion of fuzzy point to study ideal and positive implicative ideal in BCK algebras, then we clarify the links between the fuzzy point approach, the classical fuzzy approach and the ordinary case. 展开更多
关键词 BCK algebra fuzzy point fuzzy positive implicative ideal positive implicative weak ideal
下载PDF
Fuzzy Foldness of P-Ideals in BCI-Algebras
2
作者 Mahasin A. Ahmed 《Journal of Applied Mathematics and Physics》 2020年第10期2129-2141,共13页
This paper aims to introduce new notions of (fuzzy) n-fold P-ideals and (fuzzy) n-fold weak P-ideals in BCI-algebras, and investigate several properties of the foldness theory of P-ideals in BCI-algebras. Finally, we ... This paper aims to introduce new notions of (fuzzy) n-fold P-ideals and (fuzzy) n-fold weak P-ideals in BCI-algebras, and investigate several properties of the foldness theory of P-ideals in BCI-algebras. Finally, we construct a computer-program for studying the foldness theory of P-ideals in BCI-algebras. 展开更多
关键词 BCK/BCI Algebras P-ideals of BCI-Algebras Fuzzy P-ideal of BCI-Algebra Fuzzypoint (Fuzzy) n-Fold P-ideals (Fuzzy) n-Fold weak P-ideals
下载PDF
L-域上的代数的L-弱理想(英文)
3
作者 李莹 王庆平 张凤霞 《海南师范学院学报(自然科学版)》 2004年第1期9-12,共4页
定义了L-域上的代数的L-弱理想的概念,并证明了它的若干性质.
关键词 l- l-弱理想 代数 模糊子集 模糊数学
下载PDF
L-模糊弱理想与L-模糊近理想
4
作者 方正 李树平 《模糊系统与数学》 CSCD 北大核心 2005年第4期13-17,共5页
给出了L-模糊弱理想与L-模糊近理想的概念并借助于L-模糊集的几种截集给出了它们的刻画,研究了它们的运算性质。
关键词 l-模糊代数 l-模糊环 l-模糊理想 l-模糊弱理想 l-模糊近理想
下载PDF
Some Characterizations of Left Weakly Regular Ordered Semigroups 被引量:1
5
作者 TANG JIAN XIE XIANG-YUN 《Communications in Mathematical Research》 CSCD 2011年第3期253-267,共15页
In this paper, the notion of left weakly regular ordered semigroups is introduced. Furthermore, left weakly regular ordered semigroups are characterized by the properties of their left ideals, right ideals and (gener... In this paper, the notion of left weakly regular ordered semigroups is introduced. Furthermore, left weakly regular ordered semigroups are characterized by the properties of their left ideals, right ideals and (generalized) bi-ideals, and also by the properties of their fuzzy left ideals, fuzzy right ideals and fuzzy (generalized) bi-ideals. 展开更多
关键词 left weakly regular ordered semigroup generalized bi-ideal fuzzy left ideal fuzzy right ideal fuzzy bi-ideal fuzzy generalized bi-ideal
下载PDF
L-模糊弱伪理想及其性质
6
作者 王玲玲 李宏艳 《烟台大学学报(自然科学与工程版)》 CAS 2007年第4期240-243,共4页
给出了L-fuzzy弱伪理想的概念及其刻画,并研究它的运算性质.在二次弱理想的基础上,借助于以前研究者所得出的一些成果,将弱伪理想进一步推广到L-模糊集论中,提出了L-fuzzy弱伪理想的概念以及L-fuzzy弱伪理想的4种水平截集式刻画,并进一... 给出了L-fuzzy弱伪理想的概念及其刻画,并研究它的运算性质.在二次弱理想的基础上,借助于以前研究者所得出的一些成果,将弱伪理想进一步推广到L-模糊集论中,提出了L-fuzzy弱伪理想的概念以及L-fuzzy弱伪理想的4种水平截集式刻画,并进一步研究了它在L-模糊环同态下的不变性与逆不变性,以及它的和与积等运算性质. 展开更多
关键词 l-模糊代数 l-模糊环 l-模糊理想 l-模糊弱伪理想
下载PDF
Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information 被引量:3
7
作者 Zhaojun Yang Jinyan Guo +3 位作者 Hailong Tian Chuanhai Chen Yongfu Zhu Jia Liu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2021年第1期156-167,共12页
Heavy-duty machine tools are composed of many subsystems with different functions,and their reliability is governed by the reliabilities of these subsystems.It is important to rank the weaknesses of subsystems and ide... Heavy-duty machine tools are composed of many subsystems with different functions,and their reliability is governed by the reliabilities of these subsystems.It is important to rank the weaknesses of subsystems and identify the weakest subsystem to optimize products and improve their reliabilities.However,traditional ranking methods based on failure mode effect and critical analysis(FMECA)does not consider the complex maintenance of products.Herein,a weakness ranking method for the subsystems of heavy-duty machine tools is proposed based on generalized FMECA information.In this method,eight reliability indexes,including maintainability and maintenance cost,are considered in the generalized FMECA information.Subsequently,the cognition best worst method is used to calculate the weight of each screened index,and the weaknesses of the subsystems are ranked using a technique for order preference by similarity to an ideal solution.Finally,based on the failure data collected from certain domestic heavy-duty horizontal lathes,the weakness ranking result of the subsystems is obtained to verify the effectiveness of the proposed method.An improved weakness ranking method that can comprehensively analyze and identify weak subsystems is proposed herein for designing and improving the reliability of complex electromechanical products. 展开更多
关键词 Complex electromechanical products weakness ranking method Failure mode effect and critical analysis(FMECA) Cognition best worst method(CBWM) Technique for order preference by similarity to an ideal solution(TOPSIS)
下载PDF
On Pseudo Weakly Clean Rings
8
《杭州师范大学学报(自然科学版)》 CAS 2016年第5期514-521,共8页
A ring R is called a pseudo weakly clean ring i[ every element xE R can be written in the form of x=e+u+(1-e)rx or x=-e+uq-(1-e)rx where e is an idempotent and u is a invertible element. These ringsare shown to... A ring R is called a pseudo weakly clean ring i[ every element xE R can be written in the form of x=e+u+(1-e)rx or x=-e+uq-(1-e)rx where e is an idempotent and u is a invertible element. These ringsare shown to be a unifying generalization of skew power series ring R[[x;σ]], Hurwitz series ring H(R) andT(R,a). The pseudo weak cleanness of the ring o[ triangular matrices is discussed as well. Furthermore, thispaper proves that the following are equivalent: that is R is pseudo weakly clean; there is an integer n such thatR[x]/(x^n) is pseudo weakly clean; there is an integer n such that R[[x]]/(x^n) is pseudo weakly clean. 展开更多
关键词 PSEUDO weakLY clean RING SKEW power SERIES RING HURWITZ SERIES RING weakLY exchange RING ideal
下载PDF
Weakly Dual Rings
9
作者 魏俊潮 孙建华 《Northeastern Mathematical Journal》 CSCD 2004年第4期396-402,共7页
In This paper, the concept of weakly dual ring is introduced, which is a proper generalization of the dual ring. If R is a right weakly dual ring, then (1) Z(RR) = J(R); (2) If R is also a zero-division power ring, th... In This paper, the concept of weakly dual ring is introduced, which is a proper generalization of the dual ring. If R is a right weakly dual ring, then (1) Z(RR) = J(R); (2) If R is also a zero-division power ring, then R is a right AP-injective ring. In addition, some properties of weakly dual rings are given. 展开更多
关键词 weakly dual ring ANNIHILATOR W-left ideal
下载PDF
犹豫模糊软超BCK代数
10
作者 姜曼 张丹 《北华大学学报(自然科学版)》 CAS 2023年第3期286-291,共6页
把犹豫模糊软集与超BCK代数相结合,引入犹豫模糊软超BCK理想、犹豫模糊软弱超BCK理想、犹豫模糊软s-弱超BCK理想和犹豫模糊软强超BCK理想的概念,研究它们的性质和关系.讨论了犹豫模糊软(弱)超BCK理想的特征,分别给出犹豫模糊软弱超BCK... 把犹豫模糊软集与超BCK代数相结合,引入犹豫模糊软超BCK理想、犹豫模糊软弱超BCK理想、犹豫模糊软s-弱超BCK理想和犹豫模糊软强超BCK理想的概念,研究它们的性质和关系.讨论了犹豫模糊软(弱)超BCK理想的特征,分别给出犹豫模糊软弱超BCK理想是犹豫模糊软s-弱超BCK理想的条件以及犹豫模糊软集是犹豫模糊软强超BCK理想的条件. 展开更多
关键词 犹豫模糊软超BCK理想 犹豫模糊软弱超BCK理想 犹豫模糊软s-弱超BCK理想 犹豫模糊软强超BCK理想
下载PDF
On Weakly δ-Semiprimary Ideals of Commutative Rings 被引量:1
11
作者 Ayman Badawi Deniz Sonmez Gursel Yesilot 《Algebra Colloquium》 SCIE CSCD 2018年第3期387-398,共12页
Let R be a commutative ring with 1≠ 0. A proper ideal I of R is a semiprimary ideal of R if whenever a, b ∈ R and a b ∈ I, we have a ∈ √I or b ∈√I; and I is a weakly semiprimary ideal of R if whenever a, b ∈ R... Let R be a commutative ring with 1≠ 0. A proper ideal I of R is a semiprimary ideal of R if whenever a, b ∈ R and a b ∈ I, we have a ∈ √I or b ∈√I; and I is a weakly semiprimary ideal of R if whenever a, b ∈ R and 0 ≠ ab ∈ √I, we have a ∈√I or b ∈ √I. In this paper, we introduce a new class of ideals that is closely related to the class of (weakly) semiprimary ideals. Let I(R) be the set of all ideals of R and let δ : I(R) → I(R) be a function. Then δ is called an expansion function of ideals of R if whenever L, I, J are ideals of R with J I, we have L δ(L) and δ(J) δ(I). Let δ be an expansion function of ideals of R. Then a proper ideal I of R is called a δ-semiprimary (weakly δ-semiprimary) ideal of R if ab ∈ I (0 ≠ ab ∈ I) implies a ∈ δ(I) or b∈ δ(I). A number of results concerning weakly δ-semiprimary ideals and examples of weakly δ-semiprimary ideals are given. 展开更多
关键词 semiprimary ideal weakly semiprimary ideal weakly prime ideal weakly primary ideal 5-primary ideal δ-2-absorbing ideal
原文传递
Global Weak Entropy Solution of Nonlinear Ideal Reaction Chromatography System and Applications
12
作者 Jing ZHANG Hong-xia LIU Tao PAN 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2023年第1期109-134,共26页
The ideal reaction chromatography model can be regarded as a semi-coupled system of two hyperbolic partial differential equations, in which, one is a self-closed nonlinear equation for the reactant concentration and a... The ideal reaction chromatography model can be regarded as a semi-coupled system of two hyperbolic partial differential equations, in which, one is a self-closed nonlinear equation for the reactant concentration and another is a linear equation coupling the reactant concentration for the resultant concentration. This paper is concerned with the initial-boundary value problem for the above model. By the characteristic method and the truncation method, we construct the global weak entropy solution of this initial initial-boundary value problem for Riemann type of initial-boundary data. Moreover, as examples, we apply the obtained results to the cases of head-on and wide pulse injections and give the expression of the global weak entropy solution. 展开更多
关键词 ideal reaction chromatography model reactant and resultant concentration initial-boundary value problem global weak entropy solution head-on injection wide pulse injection
原文传递
非对合剩余格的BF-弱理想和BF-强理想
13
作者 刘春辉 《首都师范大学学报(自然科学版)》 2023年第5期18-23,29,共7页
对非对合剩余格的双极值模糊理想(简称BF-理想)问题进行了研究。引入了非对合剩余格的BF-弱理想和BF-强理想的概念,给出了二者的若干性质和等价刻画。讨论了BF-弱理想、BF-理想和BF-强理想的关系。利用BF-弱理想和BF-强理想的性质给出... 对非对合剩余格的双极值模糊理想(简称BF-理想)问题进行了研究。引入了非对合剩余格的BF-弱理想和BF-强理想的概念,给出了二者的若干性质和等价刻画。讨论了BF-弱理想、BF-理想和BF-强理想的关系。利用BF-弱理想和BF-强理想的性质给出了强剩余格的特征定理。指明了在强剩余格中,BF-弱理想、BF-理想和BF-强理想三者相互等价。 展开更多
关键词 模糊逻辑 非对合剩余格 BF-理想 BF-弱理想 BF-强理想
下载PDF
On Weakly 1-Absorbing Primary Ideals of Commutative Rings
14
作者 Ayman Badawi Ece Yetkin Celikel 《Algebra Colloquium》 SCIE CSCD 2022年第2期189-202,共14页
Let R be a commutative ring with 1≠0.We introduce the concept of weakly 1-absorbing primary ideal,which is a generalization of 1-absorbing primary ideal.Aproperideal I of R is said tobeweakly1-absorbing primary if wh... Let R be a commutative ring with 1≠0.We introduce the concept of weakly 1-absorbing primary ideal,which is a generalization of 1-absorbing primary ideal.Aproperideal I of R is said tobeweakly1-absorbing primary if whenevernonunit elements a,b,c∈R and O≠abc∈I,we have ab∈I or c∈√I.A number of results concerning weakly 1-absorbing primary ideals are given,as well as examples of weakly 1-absorbing primary ideals.Furthermore,we give a corrected version of a result on 1-absorbing primary ideals of commutative rings. 展开更多
关键词 1-absorbing primary ideal 2-absorbing primary ideal 2-absorbing ideal weakly 2-absorbing primary ideal weakly primary
原文传递
Weakly Closed Graphs and F-Purity of Binomial Edge Ideals
15
作者 Kazunori Matsuda 《Algebra Colloquium》 SCIE CSCD 2018年第4期567-578,共12页
Herzog,Hibi,Hreinddttir et al.introduced the class of closed graphs,and they proved that the binomial edge ideal JG of a graph G has quadratic GrSbner bases if G is closed.In this paper,we introduce the class of weakl... Herzog,Hibi,Hreinddttir et al.introduced the class of closed graphs,and they proved that the binomial edge ideal JG of a graph G has quadratic GrSbner bases if G is closed.In this paper,we introduce the class of weakly closed graphs as a generalization of the closed graph,and we prove that the quotient ring S/JG of the polynomial ring S=K[x1,...,xn,y1,...,yn]with K a field and n=|V(G)|is F-pure if G is weakly closed.This fact is a generalization of Ohtani's theorem. 展开更多
关键词 BINOMIAL edge ideal CLOSED GRAPH weakLY CLOSED GRAPH F-pure
原文传递
环的弱理想(Ⅰ) 被引量:8
16
作者 王万义 李月芬 《内蒙古师范大学学报(自然科学汉文版)》 CAS 1998年第3期180-182,共3页
通过对环的子环所满足的条件进行加强,推广了环的理想概念,引入了弱理想的概念,讨论了弱理想的基本性质,并证明了:(1)环R的理想类是R的弱理想类的真子集.(2)一个含有单位元的交换环R是除环的充分必要条件是R没有真弱理想.
关键词 子环 理想 弱理想
下载PDF
环的弱理想(Ⅱ) 被引量:5
17
作者 李月芬 王万义 《内蒙古师范大学学报(自然科学汉文版)》 CAS 1999年第4期268-271,共4页
引入了主弱理想等概念。
关键词 弱理想 主弱理想 弱剩余类环
下载PDF
辨识电网薄弱节点的多准则综合电压稳定指标 被引量:21
18
作者 高鹏 石立宝 +2 位作者 姚良忠 倪以信 Masoud Bazargan 《电网技术》 EI CSCD 北大核心 2009年第19期26-31,共6页
提出了一种辨识电网薄弱节点的多准则综合电压稳定指标。首先根据P-V和Q-V曲线计算出节点的电压变化指标和无功功率裕度指标;在此基础上,提出了采用理想点评价方法将2种电压稳定指标进行综合用于辨识系统薄弱节点。通过不同的权重系数... 提出了一种辨识电网薄弱节点的多准则综合电压稳定指标。首先根据P-V和Q-V曲线计算出节点的电压变化指标和无功功率裕度指标;在此基础上,提出了采用理想点评价方法将2种电压稳定指标进行综合用于辨识系统薄弱节点。通过不同的权重系数组合可实现不同指标偏好的决策分析。我国某实际电网的算例分析结果验证了所提方法的实用性和有效性。 展开更多
关键词 静态电压稳定 电压变化指标 无功功率裕度指标 理想点法 薄弱节点
下载PDF
偏序集上的局部弱极大理想 被引量:7
19
作者 蔡锦 姜广浩 韩贵文 《淮北师范大学学报(自然科学版)》 CAS 2011年第4期1-5,共5页
文章在偏序集上引入并考察局部弱极大理想,给出偏序集上的局部弱极大理想的存在性定理和偏序集上弱理想的一个分解定理,特别地,在满足弱理想降链条件的偏序集上弱理想的一个分解定理.这些定理推广有关文献中的相关结果.
关键词 偏序集 弱理想 弱极大理想 局部弱极大理想 弱素理想 分解
下载PDF
环的弱近理想 被引量:3
20
作者 李月芬 王万义 《内蒙古师范大学学报(自然科学汉文版)》 CAS 1999年第2期97-100,共4页
通过对环的子环所满足的条件进行加强,推广了环的理想概念,引入了弱近理想的概念,讨论了弱近理想的性质,以及弱近理想与近理想、理想。
关键词 子环 理想 弱近理想 近理想
下载PDF
上一页 1 2 5 下一页 到第
使用帮助 返回顶部