Floating collection in an academic library: An audacious experiment that succeeded

Can a floating collection thrive in a large multicampus academic research library? Floating collections have been successful in public libraries for some time, but it is uncommon for academic libraries and unheard of for a large academic library system. This article will discuss the investigation into the feasibility of a floating collection at Penn State University Libraries, its implementation, and continuation for a period covering 2009 through 2015. Attaining the floating collection, limited to monographs in the general stacks of campus libraries, proved to be easier to implement than imagined and resulted in unintended benefits as well as some surprises.     

随机变量的熵与标准熵

本文研究随机变量的熵与标准熵、标准差之间的关系,得出的结论是:对于离散型的随机变量熵与标准熵相等,与标准差无关;对于连续型随机变量ξ(ξ是的ξ标准化随机变量),熵H(ξ)等于它的标准熵H(ξ)加标准差的对数σ。从而揭示出两类常见的随机变量之间的本质性差异:离散型随机变量的不确定度与离散度无关,连续型随机变量的不确定度与离散度(标准差)呈对数关系。     

University,Knowledge and Regional Development: Factors Affecting Knowledge Transfer in a Developing Region

The role of knowledge in the current knowledge economy cannot be overly emphasised. Successful regions are continuously being linked to excellence in the production, accumulation, and application of knowledge. Universities have increasingly been at the centre of such knowledge production, application and transfer. Yet, there is little research and evidence in this regard pertaining to less developed countries. The paper aims to fill this gap. The study uses the conceptual notion of knowledge transfer to interrogate the engagement level between the university and its region. Using a qualitative approach comprising the use of primary and secondary data, the authors capture some of the factors affecting knowledge transfer. Highlighting both supply-side and demand-side factors, the authors argue in favour of a nuanced and complex negotiation of the knowledge-development interface between universities as knowledge producers and regional stakeholders as knowledge users. Such negotiations should take cognisance of local realities.     

齐国兵学文化与《孙子兵法》

齐国大地军事家辈出,兵法著作内容宏富,孙武生长于泱泱大国的古老齐国,齐国是中国的兵学发源地,先秦的主要兵书出自齐地,孙武的兵学思想上承源远流长的齐国兵学传统流脉,深深承受于地域文明滋养,深深打上了齐文化的印痕。在中国兵学发展历史上,从姜尚到孙武再到其后的孙膑,形成了源远流长而又一脉相承的齐国兵学文化传统。     

基于核密度估计多样性采集的背景建模算法

1IntroductionBackground subtraction methods are extensively ex-ploited for moving object detection in videos in manyapplications ,such as traffic monitoring[1],human mo-tion capture[2]and video surveillance[3]. The centralidea behind such methods is to segment foreground ini mage sequences taken from a fixed camera by com-paring each newframe to a model of the scene back-ground . Therefore , correctly and efficiently modelingand updating the background model is one of the mostchallenging aspec…     

Curvatures estimation on triangular mesh

Curvatures are important geometric attributes of surfaces. There are many applications that require as a first step the accurate estimation of curvatures at arbitrary vertices on a triangulated surface. Chen and Schmitt (1992) and Taubin (1995)presented two simple methods to estimate principal curvatures. They used circular arcs to approximate the normal curvature. We find this may cause large error in some cases. In this paper, we describe a more accurate method to estimate the normal curvature,and present a novel algorithm to estimate principal curvatures by simplifying the Chen and Schmitt's method. Some comparison results are also shown in this paper.     

论“变现”

文章认为，变现部分国有资产是我国建立社会保障体系和国有经济调整与改组的必然要求。一方面，由于社会保障基金的巨大的缺口，作为一种历史欠债，只能通过变现部分国有资产来偿还。另一方面，由于我国国有经济的战略性调整与改组都需要有部分国有资本通过流动变现与重组来实现。由于国有资本在变现、流动过程中发生的只是形态的转换，因此，不存在私有化问题。同时，只要变现方式得当，各项预定目的是可以实现的。     

二元函数局部一致收敛的条件

给出了当x→a时二元函数f(x,y)在y0局部一致收敛的充要条件,并且建立了实用的判别方法.     

宏编程技术探析及其在数控中工中的应用

探析了宏编程技术及其扩展数控系统功能的使用。通过例子阐述了数控加工中采用宏编程技术的重要作用,为解决一些特殊及复杂零件的加工程序编制问题提供了思路。     

将海洋工程国家重点实验室建成"国家队"

介绍了依托在上海交通大学的海洋工程国家重点实验室的定位与目标是建成“国家队”。要围绕国家船舶与海洋工程的战略目标，开展科研，攻克关键技术；要站在学科技术前沿，坚持可持续发展；要成为高技术创新源泉、培养一流创新人才的基地。并介绍了近年来取得的各项成绩。