高分子电致发光材料研究进展

综述了近几年来国内外关于高分子聚合物在电致发光材料领域的研究进展,重点介绍了聚苯撑乙烯、聚芴类、聚噻吩类聚合物及其衍生物的相关研究成果,并讨论了当前高分子电致发光材料存在的关键问题及应用前景.     

毛细管电泳Ru(bpy)_3~(2+)电化学发光的研究进展

本文简要介绍了毛细管电泳Ru(bpy)32+电化学发光的基本特性,概述了其在与复合材料和微控芯片结合应用时的研究进展,就近几年来的报道,综述了毛细管电泳Ru(bpy)32+电化学发光在药物分析,食品分析,生命科学领域的应用,并对毛细管电泳Ru(bpy)32+电化学发光的前景进行了展望.     

车辆天窗气动噪声的数值分析与实验研究

本文从汽车天窗气动噪声的机理入手,利用与实车几何尺寸为1:5的简化模型进行了空腔绕流的数值计算,分析了其流场结构及气动噪声产生的原因.在低速静音风洞中进行了不同流速下的流场和声场实验研究,研究了天窗不同位置的速度剪切层变化,以及不同流速下的声压级变化,发现了除了特征频率下的风振噪声,还存在较大频率范围的气动噪声,其随着...     

培养学生科学思维和创新能力的研究与实践——谈大学数学研究型教学

通过从一个导数值等式的证明谈起,探讨教师在课堂教学中如何根据教学内容创设能激起学生新异感的问题情景,启发和引导学生发散思考,类比、联想、猜想,探索和发现新问题并给出解答.使学生思维不断攀升,丰富教学内容,激发学生兴趣,培养学生科学思维方法和创新能力.     

基于泛函分析的高校虚拟科研团队距离管理研究

随着通信和互联网技术的高速发展,在面对科研目标越来越复杂,学科划分越来越精细的背景下,组建跨时空、跨专业的虚拟科研团队将成为未来高校科研方式的主要发展方向.以某高校A虚拟科研团队为例,从行为距离这一新的视角分析虚拟科研团队管理中的行为难题,构建了虚拟科研团队的行为距离综合评价指标体系,采用了模糊评价原理来对行为距离进行度量.最后根据度量结果,提出了解决高校虚拟科研团队的距离难题的基本思路.     

基于动力系统的线性不等式组的解法

本文提出了一种新的求解线性不等式组可行解的方法-基于动力系统的方法．假设线性不等式组的可行域为非空,在可行域的相对内域上建立一个非线性关系表达式,进而得到一个结构简单的动力系统模型．同时,定义了穿越方向。文章最后的数值实验结果表明此算法是有效的．     

Laser Microbeams and Optical Tweezers in Ageing Research

We show how a technique developed within the framework of physics and physical chemistry—in a true interdisciplinary approach—can answer questions in life sciences that are not solvable by using other techniques. Herein, we focus on blood‐pressure regulation and DNA repair in ageing studies. Laser microbeams and optical tweezers are now established tools in many fields of science, particularly in the life sciences. A short glimpse is given on the wide field of non‐age‐research applications in life sciences. Then, optical tweezers are used to show that exerting a vertical pressure on cells representing the inner lining of blood vessels results in bursts of NO liberation concomitant with large changes in cell morphology. Repeated treatment of such human umbilical vein endothelial cells (HUVEC) results in stiffening, a hallmark of manifest high blood pressure, a disease primarily of the elderly. As a second application in ageing research, a laser microbeam is used to induce, with high spatial and temporal resolution, DNA damages in the nuclei of U2OS human osteosarcoma cells. A pairwise study of the recruitment kinetics of different DNA repair proteins reveals that DNA repair starts with non‐homologous end joining (NHEJ), a repair pathway, and may only after several minutes switch to the error‐free homologous recombination repair (HRR) pathway. Since DNA damages—when incorrectly repaired—accumulate with time, laser microbeams are becoming well‐used tools in ageing research.     

Bankruptcy prediction in banks and firms via statistical and intelligent techniques – A review

This paper presents a comprehensive review of the work done, during the 1968–2005, in the application of statistical and intelligent techniques to solve the bankruptcy prediction problem faced by banks and firms. The review is categorized by taking the type of technique applied to solve this problem as an important dimension. Accordingly, the papers are grouped in the following families of techniques: (i) statistical techniques, (ii) neural networks, (iii) case-based reasoning, (iv) decision trees, (iv) operational research, (v) evolutionary approaches, (vi) rough set based techniques, (vii) other techniques subsuming fuzzy logic, support vector machine and isotonic separation and (viii) soft computing subsuming seamless hybridization of all the above-mentioned techniques. Of particular significance is that in each paper, the review highlights the source of data sets, financial ratios used, country of origin, time line of study and the comparative performance of techniques in terms of prediction accuracy wherever available. The review also lists some important directions for future research.     

产销平衡运输问题的表上作业法解法的一个注记

本文给出了用表上作业法求解产销平衡运输问题当出现退化时在相应空格填“O”的更为明确的规则，利用该规则可以避免可能存在的多余计算。本文还给出了用改进后的表上作业法求解指派问题的方法和步骤，该方法与求解指派问题的常用方法“匈牙利法”相比，具有手工计算更为简便的优点。     

一种基于区间评分的评价算法及其实现

本文针对评审工作中打分专家对各指标熟悉度不同的实际问题，提出一种基于区间评分的评价算法。因该算法通过专家给出评分区间长度反映出专家对各评审指标的熟悉度，为此定义区间的加法、减法、数乘运算及区间值的概念，这样可解决区间无法直接排序的问题。最后给出了该算法的具体步骤和实际算例。