How Far Can We Learn Anything of Practical Value from Our Pioneers? Reconsidering Wu Yifang’s Legacy of Higher Education

The dilemma confronting modern university development presents a challenge to the management ability of university presidents, hence a need to review how successful presidents of the past managed. Wu Yifang, the first Chinese woman president with remarkable achievements in education, has thus come to our attention. As President of Ginling College (GC), she was confronted with a preponderance of contradictions, including the conflicts between the ideas of Western universities and Chinese traditional culture, between Christian spirit and social responsibility, between educational logic and the political environment, between traditional inheritance and innovation, and between universal university governance experience and the unique needs of GC. She eventually succeeded in balancing these contradictions with her superb management wisdom, with the management ideas in China’s classical text, the Mean playing an important role in facilitating GC’s development. Wu Yifang’s management style demonstrated a remarkable balance in prioritizing both the pursuit of talent cultivation and social services, based on carefully catering to core principles pertaining to the development of universities and students. Wu Yifang’s management practices and philosophy can thus provide important inspiration for university presidents.     

帛书《易之义》对《周易》经文的阐述

帛书《易之义》对《周易》经文义理方面的阐发大致分为两种形式,一种是论其性质、特征,一种是按照论乾坤两卦的模式下贯而来,突出文武调和的思想。《易之义》论易卦性质与特征的价值取向是中庸、中和,并以此为基础,探讨＂和之至＂与中庸和阴阳相济思想的关系。     

基于背景减的Mean shift目标跟踪算法

为了解决初始窗口离跟踪目标较远或受干扰时,容易跟踪失败的问题,提出一种基于背景差的Mean shift跟踪模型的算法.采用背景差提取当前帧运动目标,并在当前帧运动目标位置附近进行Mean shift迭代,以巴氏系数判断当前目标和历史目标的匹配程度,根据匹配结果决定当前帧目标为跟踪目标或新增目标.实验分析,该算法可实现快速、有效目标跟踪.     

Wind-induced response analysis of a wind turbine tower including the blade-tower coupling effect

To analyze wind-induced response characteristics of a wind turbine tower more accurately, the blade-tower coupling effect was investigated. The mean wind velocity of the rotating blades and tower was simulated according to wind shear effects, and the fluctuating wind velocity time series of the wind turbine were simulated by a harmony superposition method. A dynamic finite element method （FEM） was used to calculate the wind-induced response of the blades and tower. Wind-induced responses of the tower were calculated in two cases （one included the blade-tower coupling effect, and the other only added the mass of blades and the hub at the top of the tower）, and then the maximal displacements at the top of the tower of the tow cases were compared with each other. As a result of the influence of the blade-tower coupling effect and the total base shear of the blades, the maximal displacement of the first case increased nearly by 300% compared to the second case. To obtain more precise analysis, the blade-tower coupling effect and the total base shear of the blades should be considered simultaneously in the design of wind turbine towers.     

关于平均值不等式的新应用

利用平均值不等式推得Holder不等式和在数学竞赛题中有广泛应用的＂分式和＂不等式.此外,通过平均值不等式建立了一个应用非常广泛的新不等式.     

微分中值定理的不等式形式及其应用

通过弱化中值定理的条件,得到了一个减弱了的结果,即中值定理的不等式形式,它在许多方面有一般中值定理的功效,且用它来证明一些定理时,还减弱了部分条件。     

一类加权Bergman位移的（n，1）-膨胀

证明{Tz1,Tz2,…,Tm,1,H^2（T^n）}是加权Bergman位移{√k＋1/n＋k}k=1^∞的极小（n,1）-膨胀。     

一个重要极限的证明策略

极限理论是数学分析中研究函数的重要工具,是学好高等数学的理论基础之一,而函数极限limx→0 sinx/x=1是高等数学中常用到的一个重要极限。综合运用不同知识,给予证法比较,以期有助于复习巩固所学知识,从而提高教学质量。     

读《史记》、《汉书》札记三题

在阅读《史记》、《汉书》过程中,颇感其记述及注释有可疑之处。今摘取其中三例,求正于方家。分别为《史记志疑》志疑一则;公孙弘年寿及生年;关于汉武帝元光年号的一条史料。