大学与大学图书馆委托--代理关系研究     

吕维平 《图书馆杂志》2006,25(4):36-39

本文借助委托-代理模型，解析大学与大学图书馆委托-代理关系，探讨图书馆管理者隐匿信息和隐匿行动问题、学生的“名义委托人”问题、图书馆管理者的委托与代理双重身份问题、以及图书馆管理者的监管等问题，力图找出影响图书馆发展的制度性障碍。  相似文献   

论新闻源与新闻的话语主体     

曾庆香  刘自雄 《国际新闻界》2006,(1)

本文从话语理论这一视角出发,考察新闻源对新闻话语的生成所产生的影响,认为在许多情况下,记者虽然是新闻话语的写作者,但他并非是话语的主体,他只不过是充当了编码者和代言者的角色,权威的新闻源才真正是新闻话语中说话的人。  相似文献   

Hierarchical clustering of a Finnish newspaper article collection with graded relevance assessments     

Tuomo Korenius  Jorma Laurikkala  Martti Juhola  Kalervo Järvelin 《Information Retrieval》2006,9(1):33-53

Search facilitated with agglomerative hierarchical clustering methods was studied in a collection of Finnish newspaper articles (N = 53,893). To allow quick experiments, clustering was applied to a sample (N = 5,000) that was reduced with principal components analysis. The dendrograms were heuristically cut to find an optimal partition, whose clusters were compared with each of the 30 queries to retrieve the best-matching cluster. The four-level relevance assessment was collapsed into a binary one by (A) considering all the relevant and (B) only the highly relevant documents relevant, respectively. Single linkage (SL) was the worst method. It created many tiny clusters, and, consequently, searches enabled with it had high precision and low recall. The complete linkage (CL), average linkage (AL), and Ward's methods (WM) returned reasonably-sized clusters typically of 18–32 documents. Their recall (A: 27–52%, B: 50–82%) and precision (A: 83–90%, B: 18–21%) was higher than and comparable to those of the SL clusters, respectively. The AL and WM clustering had 1–8% better effectiveness than nearest neighbor searching (NN), and SL and CL were 1–9% less efficient that NN. However, the differences were statistically insignificant. When evaluated with the liberal assessment A, the results suggest that the AL and WM clustering offer better retrieval ability than NN. Assessment B renders the AL and WM clustering better than NN, when recall is considered more important than precision. The results imply that collections in the highly inflectional and agglutinative languages, such as Finnish, may be clustered as the collections in English, provided that documents are appropriately preprocessed.  相似文献   

加强"两课"在高校思想政治教育中主渠道和主阵地作用的思考     

张丰 《喀什师范学院学报》2005,26(5):78-80

从四个方面阐述了“两课”教学中存在的普遍问题,并从提高教师素质、改进教学方法、领导重视三方面提出了创新“两课”教学,发挥其在高校思想政治教育中主渠道和主阵地作用的方法。  相似文献   

Curvatures estimation on triangular mesh     

DONG Chen-shi  WANG Guo-zhao 《浙江大学学报(A卷英文版)》2005,6(Z1)

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.  相似文献   

论王阳明“意之动”的主体意蕴     

秦红平 《贵州教育学院学报》2011,(5):29-31

王阳明认为,＂意＂指心之发动处;＂意之动＂则是善恶出现的标志,是发动之心分殊之始,也是本心与天理相融亦分的状态。＂意之动＂从＂心之体＂产生而建立在＂心之体＂上,生发＂意之动＂的主体意蕴是无善无恶的;＂意之动＂生于内而发于外,发于外的主体显现出有善有恶的意蕴;而处于内与外之间的主体则呈现主体兼性意蕴。  相似文献   

关于理想若干性质的推广     

陈华喜 《河西学院学报》2011,27(5):27-30

对理想(主理想)的和、交与积等性质做进一步的推广,给出了任意多个理想(主理想)的和、交与积的性质.  相似文献   

大学生图书馆借阅分析研究--以三明学院为例     

刘桂红  管强  林静洁 《乐山师范学院学报》2015,(6)

利用聚类分析法和主成分分析法对图书馆繁杂的借阅数据及流通数据进行分析,揭示大学生图书馆借阅三个主要特点：功利性借阅明显,专业型阅读目的显著,消遣性的阅读倾向突出。并根据这些特点为图书馆提出相关的建议。  相似文献   

基于主成分分析的生态绿道对体育旅游影响因素研究--以峨眉河生态绿道为例     

周咏松 《乐山师范学院学报》2015,(4)

通过对生态绿道体育旅游的影响因素进行主成分分析得出几个主成分因子,然后利用主成分因子建立回归模型分析影响峨眉河生态绿道体育旅游的主要因素。通过实证分析为后期政府对峨眉绿道的规划提供理论依据,也可以作为体育产业公司投资峨眉生态绿道体育旅游提供实证参考资料。  相似文献   

多维多息特征数据挖掘方法研究——以中药指纹图谱数据为例   总被引：1，自引：0，他引：1  

童逸夫  黄春毅 《现代图书情报技术》2011,(12):69-73

利用R开源统计分析软件平台,以中药HPLC指纹图谱数据为例,构建多维多息特征数据挖掘模型并进行可视化处理分析,研究结果显示主成分分析降维后的综合主成分能够反映多维多息特征数据的规律,并且验证主成分聚类模型及神经网络模型用于揭示多维多息数据的信息特征的有效性与实用性。最终根据主成分聚类分析结果,建立未知产地川芎样晶的产地预测鉴别模型,从而为川芎质量控制提供参考  相似文献