关于覆盖式不分明紧性

给出了不分明拓扑（ｆｔｓ）中覆盖式紧性的主要性质,讨论了其与若干模糊紧性等价刻划     

Additive clustering and qualitative factor analysis methods for similarity matrices

We review methods of qualitative factor analysis (QFA) developed by the author and his collaborators over the last decade and discuss the use of QFA methods for the additive clustering problem. The QFA method includes, first, finding a square Boolean matrix in a fixed set of Boolean matrices with simple structures to approximate a given similarity matrix, and, second, repeating this process again and again using residual similarity matrices. We present convergence properties for three versions of the method, provide cluster interpretations for results obtained from the algorithms, and give formulas for the evaluation of factor shares of the initial similarities variance.I am indebted to Professor P. Arabie and the referees for valuable comments and editing of the text.     

小Bloch型空间和Bloch型空间之间的加权复合算子

研究单位圆盘上的小Bloch型空间B0α和Bloch型空间Bβ之间的加权复合算子uCφ,给出了uCφ是Βα空间和Bβ0空间之间的有界算子和紧算子的充分必要条件.     

一类时滞Duffing型方程周期解的存在性

本文考虑Duffing型方程x＋f（x（t））＋g（x（t-τ））=p（t）,利用分析的技巧和非紧性测度的k-集压缩定理,得到了此方程至少存在一个T周期解的充分判据。     

关于R^2上奇异的非线性双调和方程正整解

本文以Schauder-Tychonoff不动点定理为工具,建立了一类R 2上奇异非线性双调和方程正的径向对称整体解的存在定理,并给出了解的有关性质.     

Differential response of root morphology to potassium deficient stress among rice genotypes varying in potassium efficiency

Disparity in the root morphology of six rice （Oryza sativa L.） genotypes varying in potassium （K） efficiency was studied with three K levels： 5 mg/L （low）, 10 mg/L （moderate） and 40 mg/L （adequate） in hydroponic culture. Morphological parameters included root length, surface area, volume and count of lateral roots, as well as fine （diameter〈0.2 mm） and thick （diameter〉0.2 mm） roots. The results indicate that the root growth of all genotypes was reduced under low K, but moderate K deficiency increased the root length of the efficient genotypes. At deficient and moderate K levels, all the efficient rice genotypes developed more fine roots （diameter〈0.2 mm） than the inefficient ones. Both fine root count and root surface area were found to be the best parameters to portray K stress in rice. In accordance with the root morphology, higher K concentrations were noted in shoots of the efficient genotypes when grown at moderate and deficient K levels, indicating that root morphology parameters are involved in root uptake for K and in the translocation of K up to shoots. K deficiency affected not only the root morphology, but also the root ultra-structure. The roots of high-efficient genotypes had stronger tolerance to K deficient stress for root membrane damage, and could maintain the developed root architecture to adapt to the low K growth medium.     

精细化工课程体系改革与教学内容的实时更新

阐述了精细化工课程体系改革与教学内容更新的必要性。提出了一种精细化工课程体系,着重于对精细化工课程教学内容进行了完善与更新,以及精细化工课程体系与教学内容更新后的初步教学效果。     

全空间上具有临界指数的Kirchhoff类方程两个正解的存在性

本文在参数的不同范围及给定假设下利用Ekeland变分原理、山路引理、集中紧性原理和一些分析技巧得到了全空间上具有临界指数的非线性项和非齐次扰动项的Kirchhoff类方程两个正解的存在性.     

非自治Ginzburg-Landau方程在H_0~1上的后项紧拉回吸引子

运用一个关于后项紧的拉回吸引子的存在性定理,证明了非自治的Ginzburg-Landau方程在外力项满足一定的假设条件下,在正则空间H_0~1上存在后项紧的拉回吸引子.     

高尔夫球场建设中的测量方法探讨

介绍了云台山某高尔夫球场建设项目的测量任务、测量依据,分析了工程测量、工程放样工作流程,及其工程测量实施方案、高尔夫球场建设中测量技术方法,能直接用来指导高尔夫球场工程造型建设,对高尔夫球场建设行业具有一定的指导意义。