中国的M2/GDP水平与趋势的国际比较、影响因素:1978～2002

本文对1978—2002年期间我国M2／GDP的长期趋势和周期性趋势进行了实证分析和国际比较。我国M2／GDP较高的原因在于：M2的货币乘数和准货币所占比重上升，经济货币化进程深入，融投资体制效率低下，金融体系不发达。并提出相应建议。     

具有几何分布统计特征的在线租赁竞争分析

近年来,在线算法的兴起为金融领域的研究提供了新的视角,但传统的竞争分析方法有意规避概率分布假设。在金融领域中,似乎有时忽略这些极有价值的信息而只运用标准的竞争比方法分析显然是一个极大浪费。在本文中,我们首次结合输入结构的分布信息研究了离散型在线租赁问题,建立了最优的离散型在线租赁决策模型,并给出了最优的竞争策略及其竞争比。相比较Karp和El Yaniv的研究结果,由于本文引进了输入的分布信息使得竞争比改善;而相对于Fujiwara的研究结果,由于本文研究了离散型情形,给出了实际问题的精确解。     

学术社交网络中iSchool成员用户结构与利用差异分析

[目的/意义]学术社交网络是开展知识交流与学术合作的重要平台，对iSchool成员用户的研究有助于图情学科研究人员合理利用学术社交网络。[方法/过程]本文以ResearchGate （RG）为例，采集61所iSchool成员机构的用户行为数据，依据被关注—关注比例指标进行用户细分，并从地区与层级角度对用户结构及利用差异进行比较分析。[结果/结论]地区角度，北美机构拥有较多明星型用户且注重展现与互动，亚太机构用户则更倾向于搜寻信息；层级角度，iCaucus机构用户更偏好学术资源分享，低层级机构用户跟踪获取学术资源的需求则更普遍。此外，iSchool成员机构能被RG指标进行良好的层级区分，学术影响力和层级领先的机构表现出更大的学术影响，因此应进一步合理拓展对学术社交网络的利用。     

混凝土异形柱构造配箍图的制作

《混凝土异形柱结构技术规程（JGJ149—2006）》提出按照最小配箍特征值确定箍筋加密区体积配箍率要求,相应箍筋配置方案需通过计算求得,应用不便。按《规程》要求,根据异形柱的抗震等级、截面形式与尺寸、混凝土强度等级、轴压比的大小,给出了具体的箍筋配置方案,并形成图表,方便设计人员设计、核查。     

曲线光滑性的仿射不变性

曲线上每一点只有一个曲率称之为光滑曲线.光滑曲线经仿射变换是否还光滑,所见论著中均未阐明.本文证明光滑曲线经仿射变换后仍光滑,即曲线的光滑性是仿射不变性.     

知识检索与信息检索的检索效率比较

本文在对知识检索与信息检索的检索机制分析的基础上，对知识检索与信息检索的检全率、检准率进行了比较，认为知识检索的检索效率优于传统信息检索，同时对影响知识检索效率的因素进行了讨论，指出信息检索要向知识检索过渡和发展，并针对目前网络检索的现状，提出了一些改进措施。     

Automatic building of new Field Association word candidates using search engine

With increasing popularity of the Internet and tremendous amount of on-line text, automatic document classification is important for organizing huge amounts of data. Readers can know the subject of many document fields by reading only some specific Field Association (FA) words. Document fields can be decided efficiently if there are many FA words and if the frequency rate is high. This paper proposes a method for automatically building new FA words. A WWW search engine is used to extract FA word candidates from document corpora. New FA word candidates in each field are automatically compared with previously determined FA words. Then new FA words are appended to an FA word dictionary. From the experiential results, our new system can automatically appended around 44% of new FA words to the existence FA word dictionary. Moreover, the concentration ratio 0.9 is also effective for extracting relevant FA words that needed for the system design to build FA words automatically.     

扫描电镜—能谱分析的一种新方法

在扫描电镜－能谱分析中附加－薄靶进行Ｘ射线荧光分析有很高的峰背比（即有很高的探测灵敏度）,能检测样品中存在的微量元素,并减低对样品的辐射损伤。     

泡桐营养元素吸收和循环规律研究

文章对泡桐各器官营养元素储量及其吸收循环规律进行了研究。揭示了泡桐在大生育周期和年生育期内的养分吸收循环规律：①泡桐对营养元素的吸收量随树龄的增大而增加;②泡桐各器官对营养元素吸收多少依次为叶＞枝＞花＞干＞根;③泡桐对各营养元素吸收量的多少依次为N＞K＞P;④泡桐各器官对营养元素有选择吸收作用;⑤泡桐营养元素的吸收主要集中在7月底之前;⑥泡桐营养元素的循环率为67.34%。     

Explicit expressions for the Leimkuhler curve in parametric families

In this paper we obtain the Leimkuhler curve in the case of some important statistical distributions proposed in the informetrics and econometrics literature. In this way, we complete the previous work of Burrell [Burrell, Q. L. (2005). Symmetry and other transformation features of Lorenz/Leimkuhler representations of informetric data. Information Processing and Management, 41, 1317–1329], where several open problems were stated. To do this, we use a recent and general definition of the Leimkuhler curve proposed by Sarabia [Sarabia, J. M. (2008a). A general definition of the Leimkuhler curve. Journal of Informetrics, 2, 156-163], and a new representation of the Leimkuhler curve in terms of the first-moment distribution of the population. Specifically, we obtain the Leimkuhler curve of the following distributions: classical and exponentiated Pareto distributions; three-parameter lognormal distribution; generalized gamma distribution, which includes to the exponential and classical gamma distributions among others; generalized beta distribution of the first kind and generalized beta distribution of the second kind, which includes as particular or limiting cases next important families like beta distribution of the second kind, Singh–Maddala, Dagum, Fisk or Lomax distributions. All the obtained Leimkuhler curves can be computed easily.