K-强凸空间的一些性质

结合Banach空间的Drop性，利用K维体积给出了K—强凸空间的一个新的定义，同时也给出了K—强光滑空间定义的K维体积表示，然后利用单位圆的切片证明了K—强凸空间是自反空间，进而证明了K—强凸空间与K—强光滑空间是一对对偶空间．最后利用Drop性的切片描述证明了K—强凸空间具有Drop性．     

加速牛顿迭代收敛的新方法

提出了加速牛顿迭代收敛的新思想，构造出一类加权牛顿迭代格式，通过选取最优加权因子，使得该格式具有高阶收敛性和较小的渐近误差常数。     

The solvability conditions for inverse eigenproblem of symmetric and anti‐persymmetric matrices and its approximation

The problem of generating a matrix A with specified eigen‐pair, where A is a symmetric and anti‐persymmetric matrix, is presented. An existence theorem is given and proved. A general expression of such a matrix is provided. We denote the set of such matrices by ??????_Eⁿ. The optimal approximation problem associated with ??????_Eⁿ is discussed, that is: to find the nearest matrix to a given matrix A* by A∈??????_Eⁿ. The existence and uniqueness of the optimal approximation problem is proved and the expression is provided for this nearest matrix. Copyright © 2002 John Wiley & Sons, Ltd.     

Observation on meta-stability of thulium nitrate crystal by using electric measurements

Frequency dependence of ac conductivity from 1 to 10⁵ Hz and time series of the conductivity at 2 kHz were measured along c-axis of thulium nitrate crystal, Tm(NO₃)₃6H₂O at temperatures from 203.15 to 293.15 K. The meta-stability was observed. The frequency spectra of the conductivity were similar to those in disorder system. Aging effect was observed. Non-periodic instability (burst) was found. Non-linear dynamical property was characterized by 1/f noise spectrum, limit cycle in return map and dependence of correlation exponent on embedding dimension.     

Approximating weak Chebyshev subspaces by Chebyshev subspaces

We examine to what extent finite-dimensional spaces defined on locally compact subsets of the line and possessing various weak Chebyshev properties (involving sign changes, zeros, alternation of best approximations, and peak points) can be uniformly approximated by a sequence of spaces having related properties.     

Duality Theory in Fuzzy Linear Programming Problems with Fuzzy Coefficients

The concept of fuzzy scalar (inner) product that will be used in the fuzzy objective and inequality constraints of the fuzzy primal and dual linear programming problems with fuzzy coefficients is proposed in this paper. We also introduce a solution concept that is essentially similar to the notion of Pareto optimal solution in the multiobjective programming problems by imposing a partial ordering on the set of all fuzzy numbers. We then prove the weak and strong duality theorems for fuzzy linear programming problems with fuzzy coefficients.     

从产权制度改革看高校企业改制

目前 ,未改制高校企业存在着一些问题需要解决。加快高校企业改制 ,促进高校企业快速发展 ,显得尤为重要。文章针对当前高校企业存在的问题 ,通过产权制度加以分析 ,提出了高校企业改制的一些设想。     

水平滑模水泥混凝土无侧限压缩力学特性试验

对不同配比、不同加载速率和不同放置时间下新拌滑模水泥混凝土无侧限压缩下的力学特性进行了试验 ,并从理论上对试验结果作了进一步分析 ,揭示了新拌滑模水泥混凝土的力学特性与材料配比、加载速率、放置时间的变化规律 ,为水平滑模摊铺施工和摊铺机相应工作装置的开发研究提供了试验研究依据。     

关于W变换性质的进一步讨论

根据W变换和Delta函数的定义，讨论了函数f(x)的线性函数af(x) b的W变换和函数Ⅱi-1^n，(x)的W变换问题，并推广了W变换的线性性质，得到了几个进一步的结果．     

中国加入WTO对图书馆的影响与对策

分析了中国加入世界贸易组织(VETO)后会给图书馆带来的冲击和影响。指出入世后我国图书馆界挑战与机遇并存，并提出入世后图书馆应采取的应对措施。