数理统计方法在河南地市经济发展水平和分区研究中的应用

本文运用数理统计的方法对河南省地市经济发展水平进行评价和区域划分研究。首先建立评价指标体系，然后用主成分分析法对原始数据进行数学处理，得出表示经济水平的综合指标，再用聚类分析方法进行经济发展水平层次和区域的划分。最后分析了河南省经济发展水平地域差异的原因，并提出了河南省发展经济、平衡区域差异的基本策略。  

关于非负分布重尾程度的刻画

本文针对应用概率的研究需要，提出了重度重尾分布和轻度重尾分布的概念，给出了这两类分布的一些判别准则，讨论了与重度重尾分布有关的一系列问题，并且证明了D族的一些良好性质．  

Goodness-of-fit tests for copulas: A review and a power study

Many proposals have been made recently for goodness-of-fit testing of copula models. After reviewing them briefly, the authors concentrate on “blanket tests”, i.e., those whose implementation requires neither an arbitrary categorization of the data nor any strategic choice of smoothing parameter, weight function, kernel, window, etc. The authors present a critical review of these procedures and suggest new ones. They describe and interpret the results of a large Monte Carlo experiment designed to assess the effect of the sample size and the strength of dependence on the level and power of the blanket tests for various combinations of copula models under the null hypothesis and the alternative. To circumvent problems in the determination of the limiting distribution of the test statistics under composite null hypotheses, they recommend the use of a double parametric bootstrap procedure, whose implementation is detailed. They conclude with a number of practical recommendations.  

伪Newton—B族的导出及其性质

本文对无约束优化问题提出了一类新的近似牛顿法（伪牛顿-B族）,此方法同样具有二次终止性,产生的矩阵序列保持正定对称传递性。并证明了算法的全局收敛性和超级性收敛性。  

Positive Solutions for Semipositone m-point Boundary-value Problems

Abstract   Let ξ _i ∈ (0, 1) with 0 < ξ₁ < ξ₂ < ··· < ξ _m−2 < 1, a _i , b _i ∈ [0,∞) with and . We consider the m-point boundary-value problem

关于二部图K(m,n)-2的色唯一性

设Ｋ（ｍ，ｎ）－２表示从完全二部图Ｋ（ｍ，ｎ）中删去任意２条边所得之图．本文证明了：１．若ｎ≥ｍ≥３，且ｎ＋ｍ＞(（ｎ－ｍ）^２＋８)^1/2＋１/２（ｎ－ｍ）^２＋４，则Ｋ（ｍ，ｎ）－２是色唯一图；２．当ｍ≥３时，Ｋ（ｍ，ｍ）－２，Ｋ（ｍ，ｍ＋１）－２和Ｋ（ｍ，ｍ＋２）－２均是色唯一图．  

关于人口发展方程半离散算法的研究

利用半离散的方法将人口发展方程的边界条件进行离散,离散后得到两个相应的偏微分方程模型,然后利用算子半群的理论证明了离散后的解都逼近原方程的解,从而证明这种半离散方法是可行的.  

Isomorphism classes and automorphism groups of algebras of Weyl type

In one of our recent papers, the associative and the Lie algebras of Weyl typeA[D]=A⊗F[D] were defined and studied, whereA is a commutative associative algebra with an identity element over a field F of any characteristic, and F[D] is the polynomial algebra of a commutative derivation subalgebraD ofA. In the present paper, a class of the above associative and Lie algebrasA[D] with F being a field of characteristic 0,D consisting of locally finite but not locally nilpotent derivations ofA, are studied. The isomorphism classes and automorphism groups of these associative and Lie algebras are determined  

从矩阵迹关系过渡到算子迹关系的一个通用方法(Ⅱ)

周其生等人（１９９７年）给出了一个把半正定Ｈｅｒｍｉｔｅ阵的迹关系推广到正迹类算子的相应关系的通用方法。本文把上述通用方法推广到Ｓｃｈａｔｔｅｎ类算子，并用它得到一些重要的算子迹不等式。  

不动点大类与 Nielsen数

通过引进 π１ （ Ｘ，ｘ０ ） 的同态 ｆπ 的不动子群 Ｆｉｘｆπ，在 Ｈ ＝ Ｆｉｘｆπ ·ｋｅｒｆ π为π１ （ Ｘ，ｘ０ ） 的正规子群时定义了不动点大类，得到不动点大类数是有限的．在曲面 Ｘ的正则复迭空间 Ｘ Ｈ 为有限叶时只要姜子 群相对于 Ｈ 极大，ｆ 的 Ｎｉｅｌｓｅｎ 数就可以用一维同调群计算