含参量蕴涵算子的构造及其性质

从空间几何的角度给出了几类含参量蕴涵算子，它们可以将常见的三种蕴涵算子Lukasiewicz算子、如算子及Godel算子包含其中，此外，还讨论了蕴涵算子的正则性质。     

基于R0算子的模糊概念学习

讨论基于R0蕴涵算子的模糊概念学习,建立基于该算子的内涵映射和外延映射, 讨论这两个映射的一些性质;通过这两个映射,从具有模糊属性的数据表中进行概念学习;并将R0 算子与其它蕴涵算子进行比较.     

R_O-蕴涵算子所导出的逻辑函数的特征

R_0-蕴涵算子是王国俊在2000年建立的一种新型蕴涵算子.目前,R_0-蕴涵算子在模糊控制、近似推理、模糊识别、模糊系统、计量逻辑的研究方面有着重要应用,而这些应用的共同点,是公式通过R_0-蕴涵算子所导出的逻辑函数在其中发挥着关键的作用.本文在R_0-型命题逻辑系统中,对由n个原子公式生成的公式通过R_0-蕴涵算子导出的逻辑函数的特征进行了研究,得到了函数可由R_0-型命题逻辑系统中的公式通过R_0-蕴涵算子导出的充要条件.     

模糊蕴涵算子的后件单调性及其构造的模糊系统的数学表示

根据模糊蕴涵算子θ(a,b)关于后件变量b的单调性,将文献中的400多个蕴涵算子分为三类,即后件单增(减)和后件非单调模糊蕴涵算子.进一步,给出了不同类型的蕴涵算子构造的模糊系统的数学表达式.结果表明:若后件单增蕴涵算子θ(a,b)满足θ(a,1)=φ(a)或后件单残蕴涵算子θ(a,b)满足φ(a,0)=(a)(其中φ(a)为关于a的函数.且当0相似文献   

基于蕴涵算子族L-λ-R0的模糊推理反向α-三I约束算法

提出了基于蕴涵算子族L-λ-R0的模糊推理的思想,这将有助于提高推理结果的可靠性.针对蕴涵算子族L-λ-R0给出了模糊推理的FMP模型及FMT模型的反向α-三I约束算法.     

L-λ-G族模糊蕴涵算子的性质

给出了三族模糊蕴涵算子分别称它们为L-λ-0(λ∈[21,1])、L-λ-G(λ∈[0,1])与L-λ-0-λ-G(λ∈[0,1])族模糊蕴涵算子。L-λ-0族算子包括Lukasiewicz(简称RLu)算子与R0算子,L-λ-G族算子包括RLu算子与Go。del(简称RG)算子,L-λ-0-λ-G族算子包括RLu算子、R0算子与RG算子。本文主要讨论L-λ-G(λ∈[0,1])族模糊蕴涵算子的伴随算子及其正则性。     

关于左连续蕴涵算子的连续逼近问题

从阿基米德型t-范定义的剩余型蕴涵算子是连续的蕴涵算子出发，研究关于左连续的蕴涵算子Ro和Godel蕴涵算子心'的连续逼近问题，从而进一步为模糊推理寻求理论基础。     

有限格蕴涵代数的零化子

研究有限格蕴涵代数的零化子,找出有限格蕴涵代数所有理想的零化子,并证明对有限格蕴涵代数的理想做零化子运算(记为0*)是一个逆序对合算子,因此在由有限格蕴涵代数L的所有理想所组成的集合∑(L)上定义一个蕴涵算子,则(∑(L),O,L,0*,)构成一个格蕴涵代数。     

泛蕴涵代数与FI-代数

建立了一个新的蕴涵算子Rzh，证明了利用Rzh-蕴涵区间上的模糊赋值，可将任一泛蕴涵代数“等值”地转化为一个HI-代数．     

完备格Brouwer上伪t-模与蕴涵算子的注记(Ⅱ)

进一步研究完备Brouwer格上伪t-模与蕴涵算子，给出同二元算子生成的伪t-模与蕴涵算子的计算公式。     

对偶扩张代数的Frobenius态射和固定点代数

设A是由箭图Q和关系I所确定的代数,D(A)是代数A的对偶扩张代数, 对应的箭图Q*和关系I*由Q和I决定．本文证明:带关系箭图(Q*,I*)的自同构由带关系箭图(Q,I)的自同构决定;D(A)的Frobenius态射由A的Frobenius态射完全决定;代数D(A)的固定点代数同构于相应的代数A的固定点代数与A°P的固定点代数的张量积,特别地,当Q为单的箭图时,代数D(A)的固定点代数同构于代数A的固定点代数的对偶扩张代数．     

投影算子组的联合谱

本文研究Hilbert空间H上投影算子组的联合谱.首先通过计算给出正则投影对的联合谱,进而给出一般的投影算子对的联合谱.本文还对两个投影算子的和与差的可逆性给出一些等价刻画.特别地,当P和Q为正则投影对时,本文通过计算算子组[I, P, Q]的联合谱来给出σ(P+Q)和σ(P-Q)的具体刻画.反过来,本文证明两类具有特定形式的复数集分别是Hilbert空间上正则投影对的和与差的谱.本文也给出一般的投影算子对的和与差的谱.最后,本文计算特定条件下的3个投影算子组[P, Q, R]的联合谱.     

Spectre discret des opérateurs périodiques perturbés par un opérateur différentiel à coefficients décroissants

We study the discrete spectrum arising in the spectral gaps of an elliptic periodic differential operator, P, perturbed by a differential operator, Q, with decaying coefficient. In the semi-classical regime (Q = Q(h), h0) (resp. the large-coupling constant: Q = λQ, λ → + ∞,), we obtain an asymptotic expansion in powers of h (resp. λ) of trƒ(P + Q(h)) (resp. trƒ(P + λQ)) and we give explicitly the leading term. Here ƒ ε C₀^∞(I) where I is an interval disjoint from the spectrum of P. We apply these results to study the asymptotic distribution of eigenvalues.     

Applications of fixed-point methods to discrete variational and quasi-variational inequalities

Summary In this paper, discrete analogues of variational inequalities (V.I.) and quasi-variational inequalities (Q.V.I.), encountered in stochastic control and mathematical physics, are discussed.It is shown that those discrete V.I.'s and Q.V.I.'s can be written in the fixed point formx=Tx such that eitherT or some power ofT is a contraction. This leads to globally convergent iterative methods for the solution of discrete V.I.'s and Q.V.I.'s, which are very suitable for implementation on parallel computers with single-instruction, multiple-data architecture, particularly on massively parallel processors (M.P.P.'s).This research is in part supported by the U.S. Department of Energy, Engineering Research Program, under Contract No. DE-AS05-84EH13145     

Axiomatic definition of a quotient ring

The quotient ring QΦ(R) of the ring R with respect to a strong filter Φ of right ideals of R is axiomatically defined as a maximal strong Φ-essential extension of R. The ring QΦ(R) is constructively obtained in the form of lim Hom_r (I, R), where I ∈ Φ.     

Lipschitz映射的下方图形

令(X,d)是紧的度量空间,用↓USC(X)和↓LIP(X)分别表示从X到I所有的上半连续映射和所有Lipschitz映射的下方图形的全体．本文证明如果X是一个无限的紧的度量空间,则(↓USC(X),↓LIP(X))≈(Q,B(Q)),其中B(Q)=Q\(-1,1)~ω是Hilbert立方体Q=[-1,1]~ω的伪边界．     

Esistenza,unicità e dipendenza continua per una classe di problemi ai limiti non lineari

Summary The following abstract boundary value problem is considered: Lx=Hx, Qx=0, where L, H, Q denote operators, L linear, mapping normed spaces into normed spaces. Existence and uniqueness criteria are given and the dependence of the solution on L, H, Q is studied.

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Lavoro eseguito nell'ambito dell'attività dei Gruppi di ricerca matematica del C.N.R. I numeri 1–5 sono dovuti aG. Pulvirenti e i numeri 6–10 aG. Santagati.     

Weighted norm inequalities for geometric fractional maximal operators

For 0 < let Tf denote one of the operators

关于指数、Neuman-Sándor和二次平均的一个精确双向不等式

本文证明了双向不等式αI(a; b)+(1-α )Q(a; b) < M(a; b) < βI(a; b)+(1-β)Q(a; b) 对所有不相等的正实数a和b成立当且仅当α≥1/2 和β≤[e(√2log(1+√2)-1)]/[(√2e-2) log(1+√2)]=0:4121…,其中I(a; b), M(a; b)和Q(a; b)分别表示a和b的指数平均、Neuman-Sándor平均和二次平均.     

Computing Cup Products in \mathbb {Z}_2-Cohomology of 3D Polyhedral Complexes

Let \(I=(\mathbb {Z}^3,26,6,B)\) be a three-dimensional (3D) digital image, let \(Q(I)\) be an associated cubical complex, and let \(\partial Q(I)\) be a subcomplex of \(Q(I)\) whose maximal cells are the quadrangles of \(Q(I)\) shared by a voxel of \(B\) in the foreground—the object under study—and by a voxel of \(\mathbb {Z}^3\backslash B\) in the background—the ambient space. We show how to simplify the combinatorial structure of \(\partial Q(I)\) and obtain a 3D polyhedral complex \(P(I)\) homeomorphic to \(\partial Q(I)\) but with fewer cells. We introduce an algorithm that computes cup products in \(H^*(P(I);\mathbb {Z}_2)\) directly from the combinatorics. The computational method introduced here can be effectively applied to any polyhedral complex embedded in \(\mathbb {R}^3\) .