完备格上并既约元的性质

首先给出一个连续并既约元的概念,然后在完备格上对并既约元的性质进行了探讨.     

条件交半格中的相对极大滤子

引入偏序集的相对极大滤子的概念,证明在任意条件交半格中一个滤子是相对极大滤子当且仅当它是滤子格的完全交不可约元.一个格是分配的当且仅当每一个相对极大滤子都是素滤子.随后研究了Heyting代数中相对极大滤子的刻画,最后定义和研究了完全并既约生成格.     

弱完全并既约元及其应用

首先,引入弱完全并既约元的概念,讨论它的一些基本性质,并给出完全并既约元另一等价定义。其次,借助于下邻给出了并既约元为弱完全并既约元的一个内部刻画。最后,研究了各种既约元,素元,弱完全并既约元以及紧元之间的关系。     

连续并既约元及其在刻画Fuzzy关系方程解集中的应用

本文首先引入连续并既约元(是并既约元但不是完全并既约元的元)的概念,并讨论了它的性质,然后应用连续并既约元的性质去刻画完备Brouwer格上无限Fuzzy关系方程A☉X=b的解集(其中A=(aj)j∈J和b已知,b为连续并既约元,X= (xj)j∈JT未知,“☉”表示“sup-inf”,J为无限集):给出了方程存在可达解与不可达解的充要条件及可达解与不可达解的一些性质,进一步刻画了方程的解集．     

分子格半群

在本文中，作者在格半群上引入了半群元和理想元的概念，使得半群（理想）和ＴＬ－Ｆｕｚｚｙ半群（理想）是其特例。在分子格半群上引入了群元和正规群元等概念，在更高的层次上统一了群和Ｌ－Ｆｕｚｚｙ群。     

弱连续并既约元及其应用

引入弱连续并既约元的概念,并在完备格上对它的性质进行讨论,得到若干定理。     

集值映射的伪(*)连续与弱(*)连续性

本文引入了集值映射的伪（＊）连续性与弱（＊）连续性概念的定义,研究了伪（＊）连续、（＊）连续及弱（＊）连续的等价关系,最后研究了乘积空间中的集值映射成为伪（＊）连续和弱（＊）连续的充要条件。     

新序意义下集值模糊测度的伪自连续性

在m维正欧式空间的子集类上, 通过引入集合的新序和依序收敛的概念,讨论新序意义下集值模糊测度的伪自连续、一致伪自连续性,并研究它们的蕴涵关系,从而丰富集值模糊测度的理论.     

完备主因子格

本文引入了主因子格的概念,讨论了完备主因子格中元素的结构.得到了完备主因子分配格有不可约并既分解的一个充要条件,证明了完备下连续的主因子格是有不可约并既分解的.最后讨论了完备主因子格中不可约并既分解的惟一性及可替换性,得到了完备下连续的主因子格有惟一不可约并既分解或者有可替换不可约并既分解的一些充要条件.     

乘积FC-空间内涉及——较好容许集值映象的优化映象族的极大元及其应用

引入了涉及-较好容许集值映象的映-拓扑空间到-有限连续拓扑空间（简称，FC-空间）的优化映象族．在乘积FC-空间的非紧设置下埘这类优化映象族证明了某些极大元存在性定理．在乘积FC-空间内给出了对不动点和极小极大不等式组的应用．这些定理改进、统一和推广了最近文献中的很多重要结果．     

一个新十二参矩形元

本文用“双参数法”提出了一个新的十二参矩形元，并证明了其收敛性，同时分析了该元与著名的ＡＣＭ元及十二参广义协调元之间的关系。     

曲边区域非齐次Dirichlet问题的类Wilson元逼近

1.引 言 本文考虑用类Wilson元求解曲边区域Ω上的非齐次Dirichlet问题.对于曲边区域上的Dirichlet问题,常见的方法是将剖分加密,使近似求解区域Ωh尽可能地逼近Ω.并得     

Respuesta dinámica de edificaciones producida por campos de ondas incidentes considerando la interacción suelo-estructura

This paper presents 2 methodologies based on the Boundary Element Method and the Finite Element Method to study soil-structure interaction effect on building behaviour. A 3-story building response induced by an incident wave field is studied using both methods. The results obtained show a good agreement. Then, a simplified model is validated from these methods and several buildings are analysed. Conclusions show that structural responses are due to floor deformation, and depend on their area, support conditions and coupling. A coupling between floors and columns when both elements have similar stiffness is also observed.     

连续信息代数

给出基于自由域信息代数和带论域信息代数上的连续性概念.证明在城集格有最大元的情况下,两种连续性之间是相互对应的.定义了连续信息代数之间的连续映射的概念,证得:若(φ,D),(ψ,E)都是强连续的信息代数.则([φ→ψ]c,D×E)也是强连续的.     

Sum of the Products of the Orders of Two Distinct Elements in Finite Groups

Let G be a finite group. Then we denote ψ(G) the sum of element orders in G. In [1 Amiri , H. , Jafarian Amiri , S. M. , Isaacs , I. M. ( 2009 ). Sums of element orders in finite groups . Comm. Algebra 37 ( 9 ): 2978 – 2980 .[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]] it is proved that if G is a non-cyclic group of order n, then ψ(G) < ψ(C _n ), where C _n is the cyclic group of order n. Here we generalize and improve this result, and also we give an application of this improvement.     

The maximum element order in the groups related to the linear groups which is a multiple of the defining characteristic

Let n be a natural number and q be the power of a prime p. The general, special and projective special linear groups are denoted by GL_n(q), SL_n(q) and PSL_n(q), respectively. In this paper we find the maximum order of an element of the above groups which is a multiple of p.     

Product of some elements of finite groups

In this paper, some sufficient and necessary conditions for the commutative product of two elements of finite groups are given. Moreover, some results are obtained by investigating the product of some elements.     

带性能约束的矩形图元布局优化模型及不干涉性算法

本文讨论了以航天卫星仪器舱布局优化设计为背景的、带性能约束的矩形图元布局优化模型及不干涉性判别算法,主要讨论了模型的性质,并将这一模型转化为带反凸约束的凸规划问题。应用文献(4)给出的最优性条件及定界锥分拆算法,可求得带性能约束的矩形图元布局优化问题的全局最优解。     

Unstructured meshing for two asset barrier options

Discretely observed barriers introduce discontinuities in the solution of two asset option pricing partial differential equations (PDEs) at barrier observation dates. Consequently, an accurate solution of the pricing PDE requires a fine mesh spacing near the barriers. Non-rectangular barriers pose difficulties for finite difference methods using structured meshes. It is shown that the finite element method (FEM) with standard unstructured meshing techniques can lead to significant efficiency gains over structured meshes with a comparable number of vertices. The greater accuracy achieved with unstructured meshes is shown to more than compensate for a greater solve time due to an increase in sparse matrix condition number. Results are presented for a variety of barrier shapes, including rectangles, ellipses, and rotations of these shapes. It is claimed that ellipses best represent constant (risk neutral) probability regions of underlying asset price-point movement, and are thus natural two-dimensional barrier shapes.     

关于有1模格的等价定义

进一步讨论有1模格的等价定义问题,得到并证明了一个(2,2,0)型代数成为有1模格的一个充分必要条件.这样大大简化了有1模格的等价定义.