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北师版与西师版小学数学教材分数内容难度比较研究
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作者 胡源艳 蔡丽 《西部素质教育》 2021年第24期193-195,共3页
文章基于难度模型与赋值方法,对北师版与西师版小学数学教材分数内容难度进行了比较及讨论,并对教师教学提出了相关建议,包括适当增加课时量、重视探究过程、增强与其他学科的联系等。
关键词 分数内容 小学数学教材 北师版 西师版
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小学数学“分数的初步认识”内容编排对比分析——以人教版与北师大版教材为例
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作者 高晓兰 《教育信息化论坛》 2022年第12期63-65,共3页
小学数学的各版本教材编排存在一定差异,对其进行对比研究能够帮助教师明确自己使用教材及其他版本教材的侧重点,更好地提高课堂教学效率,更快提升学生对知识的灵活运用能力。以人教版和北师大版教材的“分数的初步认识”这一章节为研... 小学数学的各版本教材编排存在一定差异,对其进行对比研究能够帮助教师明确自己使用教材及其他版本教材的侧重点,更好地提高课堂教学效率,更快提升学生对知识的灵活运用能力。以人教版和北师大版教材的“分数的初步认识”这一章节为研究对象,从内容、呈现方式、练习题、数学素养四方面进行对比分析,明确两版教材的侧重点和优劣势,并给出建议。 展开更多
关键词 小学数学 教材内容 分数的初步认识”内容编排
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学业水平测试之掌握分数 被引量:3
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作者 杨志明 《教育测量与评价(理论版)》 2015年第11期60-62,共3页
学业水平测试的主要任务是探明学生对所学知识和能力要素的掌握程度。一个孤立的测验总分报告却不能满足这种要求。为此,很有必要根据不同年级或年龄阶段对知识、能力范围与发展水平的要求,通过学科专家和测量学专家的合作,事先界定学... 学业水平测试的主要任务是探明学生对所学知识和能力要素的掌握程度。一个孤立的测验总分报告却不能满足这种要求。为此,很有必要根据不同年级或年龄阶段对知识、能力范围与发展水平的要求,通过学科专家和测量学专家的合作,事先界定学科的内容标准,并针对具体知识和能力点逐项报告内容标准掌握分数。文章就内容标准掌握分数的定义、表达方式,以及关于这种掌握分数的经典测验理论和题目反应理论的计算方法进行了探讨。 展开更多
关键词 学业水平测试 内容标准掌握分数 经典测验理论 题目反应理论
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Understanding the YouTube Partners and Their Data: Measurement and Analysis 被引量:2
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作者 CHENG Xu Fatourechi Mehrdad +2 位作者 MA Xiaoqiang ZHANG Cong LIU Jiangchuan 《China Communications》 SCIE CSCD 2014年第12期26-34,共9页
User generated content,e.g.,from YouTube,the most popular online video sharing site,is one of the major sources of today's big data and it is crucial to understand their inherent characteristics.Recently,YouTube h... User generated content,e.g.,from YouTube,the most popular online video sharing site,is one of the major sources of today's big data and it is crucial to understand their inherent characteristics.Recently,YouTube has started working with content providers(known as YouTube partners) to promote the users' watching and sharing activities.The substantial benefit is to further augment its service and monetize more videos,which is crucial to both YouTube and its partners,as well as to other providers of relevant services.In this paper,our main contribution is to analyze the massive amounts of video data from a YouTube partner's view.We make effective use of Insight,a new analytics service of YouTube that offers simple data analysis for partners.To provide the practical guidance from the raw Insight data,we enable more complex investigations for the inherent features that affect the popularity of the videos.Our findings facilitate YouTube partners to re-design current video publishing strategies,having more opportunities to attract more views. 展开更多
关键词 YouTube partners video popularity viewing behaviour user engagement
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FAST TEXT LOCATION BASED ON DISCRETE WAVELET TRANSFORM 被引量:2
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作者 LiXiaohua ShenLansun 《Journal of Electronics(China)》 2005年第4期385-394,共10页
The paper describes a texture-based fast text location scheme which operates directly in the Discrete Wavelet Transform (DWT) domain. By the distinguishing texture characteristics encoded in wavelet transform domain, ... The paper describes a texture-based fast text location scheme which operates directly in the Discrete Wavelet Transform (DWT) domain. By the distinguishing texture characteristics encoded in wavelet transform domain, the text is fast detected from complex background images stored in the compressed format such as JPEG2000 without full decompress. Compared with some traditional character location methods, the proposed scheme has the advantages of low computational cost, robust to size and font of characters and high accuracy. Preliminary experimental results show that the proposed scheme is efficient and effective. 展开更多
关键词 Text location Discrete Wavelet Transform (DWT) Semantic content Texture analysis Image/video indexing
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Experimental Study on 3D Geometrical and Fractal Characteristics of Fracture Surface of Rock-Like Materials Based on GIS Technique
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作者 李尤嘉 黄醒春 +1 位作者 邓建华 陈翔 《Journal of Donghua University(English Edition)》 EI CAS 2010年第4期477-485,共9页
In order to research the characteristic and mechanism of fracture of rock-like materials,the morphology of rock fracture surface under the breakages of uniaxial compression and triaxial compression was observed and me... In order to research the characteristic and mechanism of fracture of rock-like materials,the morphology of rock fracture surface under the breakages of uniaxial compression and triaxial compression was observed and measured by means of a new-type 3D laser scanning system.Based on geographic information system(GIS)technique,the fracture surfaces were 3D visualized and reestablished.According to GIS 3D statistics,the geometrical characteristics of fracture surfaces under different breakage conditions were analyzed,and then based on fractal theory,the change laws of fractal dimension of fracture surfaces were discussed under the conditions of different cell pressures and initial water contents of rock.Furthermore,the relationships between characteristics of fracture surface and mechanical properties of rock were discussed.The results indicate that cell pressure,initial water content,and mechanical parameters of rock are the important factors to influence on the geometrical characteristics of fracture surface.The research provides a new experimental method for quantitative study on the fracture characteristics of various materials under different breakage conditions. 展开更多
关键词 FRACTURE geometrical characteristic FRACTAL cell pressure water content geographic information system(GIS)
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A content aware chunking scheme for data de-duplication in archival storage systems
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作者 Nie Xuejun Qin Leihua Zhou Jingli 《High Technology Letters》 EI CAS 2012年第1期45-50,共6页
Based on variable sized chunking, this paper proposes a content aware chunking scheme, called CAC, that does not assume fully random file contents, but tonsiders the characteristics of the file types. CAC uses a candi... Based on variable sized chunking, this paper proposes a content aware chunking scheme, called CAC, that does not assume fully random file contents, but tonsiders the characteristics of the file types. CAC uses a candidate anchor histogram and the file-type specific knowledge to refine how anchors are determined when performing de- duplication of file data and enforces the selected average chunk size. CAC yields more chunks being found which in turn produces smaller average chtmks and a better reduction in data. We present a detailed evaluation of CAC and the experimental results show that this scheme can improve the compression ratio chunking for file types whose bytes are not randomly distributed (from 11.3% to 16.7% according to different datasets), and improve the write throughput on average by 9.7%. 展开更多
关键词 data de-duplicate content aware chunking (CAC) candidate anchor histogram (CAH)
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Moving Towards a New Era in Corporate Governance Research Methods
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作者 Ovidiu-Niculae Bordean Anca Borza 《Journal of Modern Accounting and Auditing》 2012年第7期1081-1087,共7页
Corporate governance is a relatively young field. Nonetheless, the research in this domain has been growing at an impressive speed in recent decades. Analysis of corporate governance has become a key factor in our und... Corporate governance is a relatively young field. Nonetheless, the research in this domain has been growing at an impressive speed in recent decades. Analysis of corporate governance has become a key factor in our understanding of corporations in recent years, and an indicator of investor confidence in the decisions is taken by the managers and board of directors of the listed companies. This paper evaluates both qualitative and quantitative techniques that are implied in corporate governance field. The methodological techniques are a key element of the research process In this article, the authors developed a content analysis of the published empirical research in order to expose a possible gap between what is currently done versus what needs to be done in terms of the techniques of data analysis used in corporate governance field. The results of this study allow the authors to draw some valuable conclusions regarding the trends in methodological techniques that support the evolution of corporate governance. The findings indicate that, in general, the researchers are inclined to more sophisticated quantitative techniques. However, the use of qualitative techniques remains preponderant among corporate governance scholars. 展开更多
关键词 corporate governance qualitative research quantitative research methodological techniques
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Exploring the Tourism Experience of Beginner Skiers in the Emerging Ski Market 被引量:3
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作者 PENG Yuanxiang YIN Ping +1 位作者 YANG Jingjing Kurt MATZLER 《Journal of Resources and Ecology》 CSCD 2022年第4期613-623,共11页
The skiing economy is a typical experience economy,so understanding the experience of ski tourists is essential to the development of the destination.To enrich the tourism experience research in the emerging ski marke... The skiing economy is a typical experience economy,so understanding the experience of ski tourists is essential to the development of the destination.To enrich the tourism experience research in the emerging ski market,this paper studies the 7118 online reviews of beginner skiers by selecting the main ski resorts in China as a case study.The content analysis method and sentiment analysis based on the domain lexicon and custom rules are combined to explore the perception characteristics of the beginners from the two aspects of experience dimension and experience satisfaction.Three main results were found.(1)The five main dimensions that affect the ski tourism experience of beginners are interaction perception,price perception,reputation perception,risk perception and functional perception.(2)For beginners,skiing is the primary purpose of tourism instead of being the critical factor of the positive reviews.They pay more attention to the pleasure produced by interpersonal interactions.(3)From 2014/2015 ski season to 2010/2021 ski season,the positive sentiment of beginners had no obvious change,while the negative sentiment showed a continuous downward trend,and the negative sentiment was mainly distributed among reviews on price,low temperature and service.This paper not only expands the research perspective of ski tourism,but also provides managerial inspiration for ski destinations interested in attracting beginners from the emerging ski markets. 展开更多
关键词 ski destination tourist experience big data sentiment analysis content analysis
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