Abstract functions with continuous differences and Namioka spaces

Let be a semigroup and a topological space. Let be an Abelian topological group. The right differences of a function are defined by for . Let be continuous at the identity of for all in a neighbourhood of . We give conditions on or range under which is continuous for any topological space . We also seek conditions on under which we conclude that is continuous at for arbitrary . This led us to introduce new classes of semigroups containing all complete metric and locally countably compact quasitopological groups. In this paper we study these classes and explore their relation with Namioka spaces.

     

企业对环境应变的和谐性分析

利用和谐理论原理及和谐分析矩阵,分析和判定企业对环境适应的和谐程度以及环境对企业的制约性,从而为企业进一步的决策奠定基础．     

具有任意未知常时滞线性大系统的稳定性

采用李雅普诺夫泛函法结合一个二次型不等式建立了时滞大系统的稳定性判据．所考虑的时滞可以是任意未知常时滞,故所得结果是时滞无关的．例子比较结果证明,所建立的结果优于文献中给出的结果．同时,给出了例子的仿真结果．     

The identification of tricyclic neuroleptics and sulphonamides by high-performance thin-layer chromatography

Circular high-performance thin-layer chromatography (HPTLC) has been used to differentiate a series of twelve tricyclic neuroleptics, using both normal phase and reverse phase procedures. The use of normal phase systems also allows the resolution of geometric isomers of chlorprothixene, clopenthixol and flupenthixol. Thirteen sulphonamides and Trirnethoprim may also be distinguished using HPTLC.     

Electric conductivity in a fibrous porous medium with thin but polarized double layers

The electric conduction in the fibrous medium constructed by a homogeneous array of parallel, identical, charged, circular cylinders having an arbitrary zeta potential filled with the solution of a symmetrically charged electrolyte is analytically examined. The thickness of the electric double layers surrounding the dielectric cylinders is assumed to be small relative to the radius of each cylinder and to the gap width between two neighboring cylinders, but the polarization of the mobile ions in the diffuse layers is allowed. The effect of interactions among individual cylinders is taken into explicit account by employing a unit cell model. The appropriate equations of conservation of electrochemical potential energies of ionic species are solved for each cell, in which a cylinder is envisaged to be surrounded by a coaxial cylindrical shell of the fluid solution. Analytical expressions for the effective electric conductivity are obtained in closed forms as functions of the porosity of the fiber matrix and other characteristics of the porous system. Comparisons of the results of the cell model with different conditions at the outer boundary of the cell are made. Under an otherwise identical condition, the electric conductivity in a porous medium composed of an array of parallel cylinders in the transverse direction is smaller than that of a suspension of spheres. The effect of interactions among the cylinders or spheres on the effective conductivity can be quite significant under appropriate conditions.     

浅议构建和谐社会进程中的农民工

中国改革开放以来最大的社会分化就是农民的分化，而农民最明显的分化就是分化出一个独特的、人数越来越多的“农民工”阶层。然而，受城乡二元户籍制度和城市二元劳动市场制度的制约，导致农民进城就业的不稳定性与风险性，使得绝大多数进城流动就业的农民工往往在城乡之间双向流动。各级地方政府应该更新观念，与时俱进，切实保护农民工的基本权益，促进社会和谐。     

非双曲非临界不变环面的分支

考虑一个在相空间具有非双曲非临界闭轨的n维自治系统的周期扰动系统,研究了该自治系统在空间(x,t)上的非双曲非临界不变环面的分支,得到了2个主要的结果.     

中国古代数学语言与中国文化特征的分析

中国古代数学领先世界的成就及独特的思维方式和语言，不仅为中国文化特征的形成奠定了基础，而且决定了中国文化在某种程度上呈现为数文化的特征。固然，这种文化因具有原始型文化的特征而存在着异常浓厚的神秘性，但塑造了中国文化的恢弘博大与无比强大的包容能力，不仅决定了中国文化的宽泛性和虚灵性，而且决定了中国文化具有西方文化所不具备的美。     

民族融合影响下的古代西方文学研究

通过对古希腊罗马文化、希伯来文化特质的研究，挖掘出西方文化的基础和精神内涵；通过对宗教、战争在民族融合中的表现、影响，阐发二者在古代西方文明、文化互动、互补、整合中对文学的影响：体裁上以神话、史诗、英雄传说、英雄史诗和教会文学为主，文学的精神内核表现出世俗人本意识、宗教人本思想的特征，其合理成分——仁爱、宽恕、平等等观念对后世文学产生了重大影响。     

室内设计与现代追求:居室设计的审美思考

文章从自然美、和谐美，个性美的角度阐述了现代居室设计中的美学趋向。提出现代居室设计，强调以“人”的主体性作为设计依据，在满足功能的前提下，坚持艺术多元化、设计民族化的方向，创造新颖、合理、优美的室内空间环境