灰色预测法在情报研究中的应用研究综述     

张晶晶  李泽霞 《图书情报工作》2020,64(24):106-114

[目的/意义] 灰色预测法可有效处理情报研究中广泛存在的小样本数据，通过对灰色预测法在情报研究中的应用情况进行梳理，总结其在应用过程中存在的不足，为灰色预测法在情报研究中的进一步应用提供参考。[方法/过程] 通过综述情报研究中涉及灰色预测法的相关文献，从数据选取、模型构建和解决的问题等方面对情报研究中灰色预测法的应用进行概述，总结当前情报研究中灰色预测法的应用所存在的问题，并提出改进建议。[结果/结论] 在方法应用上，已有研究主要采用数列灰预测，且模型集中在单变量灰色预测模型，根据预测对象不同，灰色预测法已经在包括期刊分析、图书馆运行管理、热点主题分析及科研机构评价方面得到了很好的应用，未来可根据预测对象特点及研究目标尝试不同的灰色预测方法，扩宽灰色预测法在其他方面的情报研究问题中的应用。  相似文献   

Quality flaw prediction in Spanish Wikipedia: A case of study with verifiability flaws     

Edgardo Ferretti  Leticia Cagnina  Viviana Paiz  Sebastián Delle Donne  Rodrigo Zacagnini  Marcelo Errecalde 《Information processing & management》2018,54(6):1169-1181

In this work, we present the first quality flaw prediction study for articles containing the two most frequent verifiability flaws in Spanish Wikipedia: articles which do not cite any references or sources at all (denominated Unreferenced) and articles that need additional citations for verification (so-called Refimprove). Based on the underlying characteristics of each flaw, different state-of-the-art approaches were evaluated. For articles not citing any references, a well-established rule-based approach was evaluated and interesting findings show that some of them suffer from Refimprove flaw instead. Likewise, for articles that need additional citations for verification, the well-known PU learning and one-class classification approaches were evaluated. Besides, new methods were compared and a new feature was also proposed to model this latter flaw. The results showed that new methods such as under-bagged decision trees with sum or majority voting rules, biased-SVM, and centroid-based balanced SVM, perform best in comparison with the ones previously published.  相似文献   

Cross-company customer churn prediction in telecommunication: A comparison of data transformation methods     

《International Journal of Information Management》2019

Cross-Company Churn Prediction (CCCP) is a domain of research where one company (target) is lacking enough data and can use data from another company (source) to predict customer churn successfully. To support CCCP, the cross-company data is usually transformed to a set of similar normal distribution of target company data prior to building a CCCP model. However, it is still unclear which data transformation method is most effective in CCCP. Also, the impact of data transformation methods on CCCP model performance using different classifiers have not been comprehensively explored in the telecommunication sector. In this study, we devised a model for CCCP using data transformation methods (i.e., log, z-score, rank and box-cox) and presented not only an extensive comparison to validate the impact of these transformation methods in CCCP, but also evaluated the performance of underlying baseline classifiers (i.e., Naive Bayes (NB), K-Nearest Neighbour (KNN), Gradient Boosted Tree (GBT), Single Rule Induction (SRI) and Deep learner Neural net (DP)) for customer churn prediction in telecommunication sector using the above mentioned data transformation methods. We performed experiments on publicly available datasets related to the telecommunication sector. The results demonstrated that most of the data transformation methods (e.g., log, rank, and box-cox) improve the performance of CCCP significantly. However, the Z-Score data transformation method could not achieve better results as compared to the rest of the data transformation methods in this study. Moreover, it is also investigated that the CCCP model based on NB outperform on transformed data and DP, KNN and GBT performed on the average, while SRI classifier did not show significant results in term of the commonly used evaluation measures (i.e., probability of detection, probability of false alarm, area under the curve and g-mean).  相似文献   

多媒体教学手段对数学教学的影响     

林云爱 《吕梁教育学院学报》2004,(4)

多媒体作为一种现代化的教学工具,在现阶段的教学中得到了广泛的运用。本文通过具体事例从不同方面反映了多媒体给数学教学带来的变化,进一步阐述了网络教学的重要性。  相似文献   

人体上下肢长预测方法的研究与应用     

田文秀 《山东体育学院学报》2004,20(3):60-61

人体生长发育过程中，具有非等比性和向心律的特点，在生长发育结束以前测评出的形态比例关系，不能直接说明成熟后的情况。通过对7～18岁儿童少年发育状况的调研，提出了人体上下肢长与身高比例关系的预测方法。  相似文献   

关于影响蔡民十项全能主要因素的分析及成绩的预测研究     

张杏波 《浙江体育科学》2004,26(2):89-90,96

应用灰色系统对十项全能的影响因素进行了分析,找出了影响其成绩变化的优势因素.并运用灰色动态模型进行了近期和短期的预测,结果证明这一方法对十项成绩的预测准确性较好,残差一般为±0.25% .  相似文献   

论高校体育文化的内涵、特征与功能   总被引：6，自引：1，他引：5  

黄衍存 《福建体育科技》2004,23(1):49-51

高校体育文化作为校园文化的一部分,是一种有深刻内涵和丰富外延的社会文化现象,是大学生在进行校园体育实践中形成的物质和精神财富。文章对高校体育文化的内涵、特征与功能作了初步的理论探讨,指出高校体育文化在高校文化建设中有着独特的地位和作用。  相似文献   

试论体育意识   总被引：11，自引：1，他引：10  

黄一飞  耒芬梅 《浙江体育科学》1995,(2)

本文运用马克思主义哲学原理和逻辑学的基本理论阐述了体育意识的涵义、主要特点、基本作用和增强体育意识的手段和途径。  相似文献   

健美操课对中专女生形态、素质、机能影响的实验研究   总被引：3，自引：0，他引：3  

杨品良 《福建体育科技》2003,22(4):49-51

本文通过对 2 0 0名女中专生进行健美操锻炼的实验研究 ,试图揭示健美操锻炼对仍处于青春发育期的中专女生 ,在形态、身体素质、生理机能三方面的影响情况。研究表明长期的健美操锻炼能有效改善女生的体态 ,并对呼吸系统、心肌功能的增强有良好的促进作用 ,但在身体素质方面 ,除了耐力素质有明显提高外 ,上肢力量和速度素质无显著差异。  相似文献   

斜方肌的形态学分析及其肌力练习     

宋国强  张东亮 《南京体育学院学报(社会科学版)》2001,15(1):13-15

运用运动形态分析的方法初步考察了斜方肌各部位肌束对人体基本能力及动作结构生物力学特征的影响，指出其在体育锻炼中的重要功能，并提供了若干种发展斜方肌力量的练习方法。  相似文献