区域科技创新能力的灰色关联综合评价研究

采用灰色关联度确定权重的多目标决策方法,根据科技创新能力相关的数据指标集,对我国八大经济区科技创新能力给予了综合评价和排序.这种定量确定权重的方法,为综合评价区域的创新能力提供了一种更为实用、简洁、可操作性的新方法.     

灰色聚类关联分析法的改进及其应用

引入平滑的指数函数对灰色聚类关联分析法中的白化函数进行改进,使其能够充分、合理地利用已知信息,对样本进行更客观、准确地评价.本文以郑州地区6县市的大气监测数据为例,应用改进的灰色聚类关联分析法对其大气质量进行评价,通过构造新的白化函数和计算各测点不同级别的隶属度和关联度,可判断出各县市环境质量的优劣次序为:中牟>新密>登封>新郑>荥阳>巩义,所得结果与各县市大气环境质量实际状况相符合,由此说明改进的灰色聚类关联分析法为大气环境质量的评价提供了更可靠的方法.     

基于11种灰色关联度法的卫生指标序列应用比较分析

以序列灰色关联分析方法应用为视角,简述多种关联度方法基本流程;借助算例验证分析,为类似问题研究提供技术参考.分别阐述11种灰色关联度法原理及步骤,以医疗卫生指标时间序列为例计算实现.简要给出所有方法实施步骤,方法原理及信息利用有差异.序列间关联度结果与实际问题演示情形一致.11种灰色关联度法有集成讨论意义,有待于卫生领域综合对比及科学选用,也可以为因素筛选、综合评价、时序分析和聚类优化等应用问题提供借鉴.     

基于最大灰色关联度的聚类方法分析

利用多元统计学的最短距离法原理,定义了不同类别之间的关联度,构造了一种基于最大灰色关联度的聚类方法,建立了最大灰色关联度模型,并对模型进行求解,结果表明,新的聚类方法纠正了已有的灰色关联聚类中聚类原则存在的缺陷,从而为聚类提供了更有说服力且易于计算的方法.最后通过实例验证了该方法的客观性和有效性.     

灰色聚类分析法在评价材料合理代用的应用

对于价格高昂或者市场紧缺的材料,使用灰色聚类分析法,能够找到合理的代用品,避免了凭经验选择代用材料所带来的主观片面性.介绍了灰色聚类分析法的基本原理、分析步骤及其在产品选择代用方面的应用实例.结果表明,采用灰色聚类分析方法解决材料的代用问题是一种行之有效的方法,应用该方法能够综合考虑影响性能的多种因素,避免了单因素的主观性,评价过程更加合理客观,评价结果能准确的反映代用品的性能.     

灰色模糊聚类理论在飞机方案优选中的应用研究

将灰色系统理论应用到飞机设计方案评价中,研究了一种含有方案评价指标体系和考虑评价指标权重以及灰关联分析的飞机方案优选灰色模糊聚类决策理论,这种决策理论利用指标权重将评价指标联系在一起,在评价方案与理想方案灰关联度的基础上进行灰色模糊聚类,实现方案优选.最后以一个短距/垂直起降(V/STOL)飞机设计实例证实此方法的科学性与可行性.     

基于聚类与灰色关联分析模型的机场群协同发展评价

随着我国经济社会的发展,为了适应发展上的新要求区域协同发展成为主要趋势.交·通协同发展是区域协同发展中的先行者,机场群的建设对于区域交通协同有着重要意义.提出了机场群协同发展评价的模型,首先利用相关系数法对机场群内的机场进行模糊聚类,选择合适分类数;然后将每一个分类作为一个系统,加入对系统影响程度大的评价指标构成系统指标序列;最后基于灰色关联分析模型计算综合关联度与系统间的协同度.还以京津冀地区为例进行实例分析,评价目前机场群协同发展是否能有效疏解北京非首都职能.     

基于范数灰关联度赋权的模糊综合水质评价研究

在模糊综合评价方法的基础上,提出范数灰关联度的概念.通过范数的近距和远距,获取各因子的关联度和权重系数,充分利用了样本的共性和个性信息.利用灰关联度赋权的模糊综合评价法对延安市境内延河流域上的8个监测断面进行水质评价,取得了较好的结果,并与熵权模糊综合评价法、灰色关联分析法进行比较,结果更加客观、合理.     

基于相对熵赋权和灰色理论的高校教师创新能力综合评价

提高高校教师的创新能力,对于践行科学发展观、增强高校市场竞争力,乃至推动国民经济的进步都具有重要意义.以高校教师创新能力综合评价为出发点,通过构建高校教师创新能力评价指标体系,建立基于层次分析法和灰色关联分析法的多指标综合评估模型,并通过案例介绍了模型的具体应用.     

我国环境污染与居民恶性肿瘤发病及死亡的灰色关联度分析

收集2003-2012年三个区域:全国区域、城市区域、农村区域的恶性肿瘤发病及死亡率和污染物数据,采用灰色关联分析方法计算了不同区域与不同污染物的综合关联度,并对污染物致恶性肿瘤死亡的潜伏期作了定量分析.研究结果表明:1)氨氮排放量和二氧化硫对我国三个不同区域居民恶性肿瘤发病和死亡率的影响最大;2)污染物与恶性肿瘤发病率的关联度跟区域无关,但是污染物与恶性肿瘤死亡率的关联度城市明显大于农村,污染物与恶性肿瘤死亡率的关联度男性明显大于女性;3)氨氮和二氧化硫导致居民恶性肿瘤死亡的潜伏期分别为:2和1年.     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.     

Generalization of the interaction between Haar approximation and polynomial operators to higher order methods

In applications it is useful to compute the local average empirical statistics on u. A very simple relation exists when of a function f（u） of an input u from the local averages are given by a Haar approximation. The question is to know if it holds for higher order approximation methods. To do so, it is necessary to use approximate product operators defined over linear approximation spaces. These products are characterized by a Strang and Fix like condition. An explicit construction of these product operators is exhibited for piecewise polynomial functions, using Hermite interpolation. The averaging relation which holds for the Haar approximation is then recovered when the product is defined by a two point Hermite interpolation.