基于多因素指标的上市公司分类及评价方法

针对能够反映上市公司绩效的盈利性、安全性以及规模性多因素指标,采用聚类分析的方法对30家上市公司进行了分类.为能够甄别各类上市公司的优劣程度,利用密切值法,对四类上市公司进行了综合评价,并对其进行了优先次序的排序和等级的划分.     

Poincaré线性连续统直觉概念的公式化(英文)

本文研究了Poincaré著名注记中“内束”观念的数学表述法问题,通过构建Poincaré连续统模型,得到了这一问题的一种解答。文中还论述了有关数理哲学及方法论问题;文末特别指出了须继续研究的数学问题。     

Molecular mixing of incompatible polymers through formation of and coalescence from their common crystalline cyclodextrin inclusion compounds

We describe the successful mixing of polymer pairs and triplets that are normally incompatible to form blends that possess molecular‐level homogeneity. This is achieved by the simultaneous formation of crystalline inclusion compounds (ICs) between host cyclodextrins (CDs) and two or more guest polymers, followed by coalescing the included guest polymers from their common CD–ICs to form blends. Several such CD–IC fabricated blends, including both polymer1/polymer2 binary and polymer1/ polymer2/polymer3 ternary blends, are described and examined by means of X‐ray diffraction, differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared spectroscopy, and solid‐state NMR to probe their levels of mixing. It is generally observed that homogeneous blends with a molecular‐level mixing of blend components is achieved, even when the blend components are normally immiscible by the usual solution and melt blending techniques. In addition, when block copolymers composed of inherently immiscible blocks are coalesced from their CD–ICs, significant suppression of their normal phase‐segregated morphologies generally occurs. Preliminary observations of the thermal and temporal stabilities of the CD–IC coalesced blends and block copolymers are reported, and CD–IC fabrication of polymer blends and reorganization of block copolymers are suggested as a potentially novel means to achieve a significant expansion of the range of useful polymer materials. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 4207–4224, 2004     

论Poincar\''{e}型连续统及其某些基本性质

本文给出了Poincar\'{e}直觉主义连续统的一种超标准模型[PC],并证明了三条基本性质. [PC]是模型(PC)的深化和改进.作为其应用,文中还概述了子模型$\overline{R}$ (非Cantor型连续统)上的一种非标准微积分.     

省域低碳经济发展分类及评价研究

在构建区域低碳经济评价指标体系的基础上,在省区低碳经济分类评价中,运用多元统计方法中的聚类分析和系统工程学中的密切值法,结合2011年中国统计年鉴的统计数据对相关指标的数据样本进行了聚类分析,将低碳经济发展相类似的地区划成群体,再用密切值法对聚类所得的群体进行排序,从而评价出各地区的低碳经济发展水平.