基于LabVIEW的振动测试分析系统   总被引：4，自引：0，他引：4  

钱阳  周月平  陈俊伟 《温州大学学报(社会科学版)》2005,18(4):58-61

基于LabVIEW的振动测试分析系统由系统硬件和振动测试分析软件两大部分组成．其中，振动测试分析软件是本系统的核心．振动测试分析软件的主要功能是控制数据采集板进行数据采集；根据信号处理的基本原理，对采集的数据进行幅值谱分析、自相关分析、互相关分析、自功率谱分析、互功率谱分析、相干函数分析等．  相似文献   

决策树ID3算法在学生成绩中的应用   总被引：2，自引：0，他引：2  

姜红艳 《鞍山师范学院学报》2008,10(4)

介绍了数据挖掘中决策树的分类方法和概念,以及著名的ID3算法,同时也介绍了ID3算法在学生成绩中的应用.  相似文献   

Teachers learning how to use data: A synthesis of the issues and what is known     

《Teaching and Teacher Education》2016

This article provides a synthesis of the articles found in the special issue on data use. The synthetic piece contextualizes how the articles contribute to the knowledge base of how teachers use data. It synthesizes the findings by identifying key common themes. It then describes gaps in the current knowledge base and identifies the requisite steps needed to address those gaps.  相似文献   

企业数据库体系化环境及建设     

袁磊 《襄樊学院学报》2001,22(5):68-72

信息化建设是目前企业为提高自身竞争而正在做的一项重要工作，企业信息化的目的就是要让自己和服务对象能及时获得所需要的信息，以调整和控制企业的运营，为用户提供更好的产品和服务，章从企业数据环境的角度，给出了企业数据库体系化环境的概念，说明了各层次数据库的作用，探讨了数据库体系化环境的建设。  相似文献   

Abstraction and consolidation of the limit procept by means of instrumented schemes: the complementary role of three different frameworks     

Ivy Kidron 《Educational Studies in Mathematics》2008,69(3):197-216

I investigate the contributions of three theoretical frameworks to a research process and the complementary role played by each. First, I describe the essence of each theory and then follow the analysis of their specific influence on the research process. The research process is on the conceptualization of the notion of limit by means of the discrete continuous interplay. I investigate the influence of the different perspectives on the research process and realize that the different theoretical approaches intertwine. Moreover, I realize that the research study demanded the contribution of more than one theoretical approach to the research process and that the differences between the frameworks could serve as a basis for complementarities.  相似文献   

湖北省城乡基本公共服务均等化现状及对策研究——以基础设施建设为例     

方堃  李杨  黄智娟 《襄樊学院学报》2011,32(1):5-11

受城乡二元分割的体制性束缚,当前湖北省推进城乡基础设施均等化面临着诸多突出瓶颈。促进湖北城乡基本公共服务均等化的路径是:统筹城乡规划、拓展投资渠道、加强监督和管护、改善民生性设施,从而促使基础设施向农村整体和有效地延伸。  相似文献   

我国基础建设上市公司股权结构的实证分析     

张建平  郭洁  张莉 《山西大学师范学院学报》2011,(5):59-62

根据2007—2010年上海证券交易所发行A股的所有基础建设上市公司的年度报告中关于内部控制股权结构情况,采用统计分析的方法,对我国基础建设上市公司的股权性质、集中度、董事会结构等现状进行分析,发现我国基础建设上市公司内部控制股权结构存在一些问题,诸如股权高度集中在国家手中以及董事会结构不健全等。从政府、法律、公司等角度进行原因分析,对机构投资者、公司自身、国家等方面提出相应的改进措施,以期完善我国基础建设上市公司内部控制。  相似文献   

C语言中变量的性质     

田艳华 《中国科技信息》2006,(5):60-61

讨论了C语言中变量的特性，分析了变量的分类、作用域、存储类型厦存储方式。  相似文献   

Automatic ranking of information retrieval systems using data fusion     

Rabia Nuray  Fazli Can 《Information processing & management》2006

Measuring effectiveness of information retrieval (IR) systems is essential for research and development and for monitoring search quality in dynamic environments. In this study, we employ new methods for automatic ranking of retrieval systems. In these methods, we merge the retrieval results of multiple systems using various data fusion algorithms, use the top-ranked documents in the merged result as the “(pseudo) relevant documents,” and employ these documents to evaluate and rank the systems. Experiments using Text REtrieval Conference (TREC) data provide statistically significant strong correlations with human-based assessments of the same systems. We hypothesize that the selection of systems that would return documents different from the majority could eliminate the ordinary systems from data fusion and provide better discrimination among the documents and systems. This could improve the effectiveness of automatic ranking. Based on this intuition, we introduce a new method for the selection of systems to be used for data fusion. For this purpose, we use the bias concept that measures the deviation of a system from the norm or majority and employ the systems with higher bias in the data fusion process. This approach provides even higher correlations with the human-based results. We demonstrate that our approach outperforms the previously proposed automatic ranking methods.  相似文献   

基于COM的关联规则挖掘算法的设计与实现     

尹燕 《科技广场》2007,(5):87-88

本文首先从理论角度分析了关联规则挖掘算法与聚类挖掘算法原理及其应用领域,然后介绍了Aprior算法的实现及封装,并设计了可视化界面,对算法进行了测试。  相似文献