体质指数法、皮褶厚度法和生物电阻抗法判断青少年超重、肥胖的一致性     

邹志春  陈佩杰  庄洁 《上海体育学院学报》2012,(1):64-67

运用体质指数法、皮褶厚度法及生物电阻抗法,判断上海城区儿童青少年超重、肥胖发生率及其一致性。结果显示:3种方法在判断不同年龄、性别儿童青少年超重、肥胖上一致性较低;测量原理与精确性不同,青少年儿童体成分化学组成不成熟及诊断、筛查标准的差异可能是3种方法一致性较低的原因。提出应建立适合我国儿童青少年"多维模型"假设下的体脂率预测方程。  相似文献   

Near-duplicate video detection featuring coupled temporal and perceptual visual structures and logical inference based matching     

Mohammed Belkhatir  Bashar Tahayna 《Information processing & management》2012

We propose in this paper an architecture for near-duplicate video detection based on: (i) index and query signature based structures integrating temporal and perceptual visual features and (ii) a matching framework computing the logical inference between index and query documents. As far as indexing is concerned, instead of concatenating low-level visual features in high-dimensional spaces which results in curse of dimensionality and redundancy issues, we adopt a perceptual symbolic representation based on color and texture concepts. For matching, we propose to instantiate a retrieval model based on logical inference through the coupling of an N-gram sliding window process and theoretically-sound lattice-based structures. The techniques we cover are robust and insensitive to general video editing and/or degradation, making it ideal for re-broadcasted video search. Experiments are carried out on large quantities of video data collected from the TRECVID 02, 03 and 04 collections and real-world video broadcasts recorded from two German TV stations. An empirical comparison over two state-of-the-art dynamic programming techniques is encouraging and demonstrates the advantage and feasibility of our method.  相似文献   

基于文本潜在特性分类方法研究与仿真     

巫桂梅 《科技通报》2012,28(7):148-151

研究文本快速准确分类的问题。同一词语在不同的语言环境下或者由不同的人使用可能代表不同的含义,这些词语在文本分类中的描述特征却极为相似。传统的文本分类方法是将文本表示成向量空间模型,向量空间模型只是从词语的出现频率角度构造,当文中出现一些多义词和同义词时就会出现分类延时明显准确性不高等特点。为此提出一种基于语义索引的文本主题匹配方法。将文本进行关键词的抽取后构造文档-词语矩阵,SVD分解后通过优化平衡的方法进行矩阵降维与相似度的计算,克服传统方法的弊端。实践证明,这种方法能大幅度降低同义词与多义词对文本分类时的影响,使文本按主题匹配分类时准确高效,实验效果明显提高。  相似文献   

商贸汉英翻译原则的运用及启示     

蔡璀红 《牡丹江教育学院学报》2010,(1):43-44

商贸翻译在当今商务活动中的作用越来越突出,而商贸翻译却是翻译学科中的薄弱环节,译文质量不尽人意,现状令人担忧。本文根据刘法公教授提出的商贸汉英翻译三原则,结合实例评析译文,总结商贸汉英翻译中的常见问题,并尝试提出一些改进措施,以期提高商贸汉英翻译质量。  相似文献   

Spelling consistency affects reading in young Dutch readers with and without dyslexia     

Bosman AM  Vonk W  van Zwam M 《Annals of dyslexia》2006,56(2):271-300

Lexical-decision studies with experienced English and French readers have shown that visual-word identification is not only affected by pronunciation inconsistency of a word (i.e., multiple ways to pronounce a spelling body), but also by spelling inconsistency (i.e., multiple ways to spell a pronunciation rime). The aim of this study was to compare the reading behavior of young Dutch readers with dyslexia to the behavior of readers without dyslexia. All students participated in a lexical-decision task in which we presented pronunciation-consistent words and pseudowords. Half of the pronunciation-consistent stimuli were spelling consistent and the other half were spelling inconsistent. All three reader groups, that is, students with dyslexia, age-match students, and reading-match students, read spelling-consistent words faster than spelling-inconsistent words. Overall reading speed of students with dyslexia was similar to that of reading-match students, and was substantially slower than that of age-match students. The results suggest that reading in students with or without dyslexia is similarly affected by spelling inconsistency. Subtle qualitative differences emerged, however, with respect to pseudoword identification. The conclusion was that the findings were best interpreted in terms of a recurrent-feedback model.  相似文献   

四角号码检字法考略     

陈振文  何锦川 《邯郸师专学报》2013,(4):75-80

“四角号码检字法”始于高梦旦,成于王云五.该检字法与张玉生的《国音电码合刊》并无瓜葛.从改进与推行“四角号码检字法”到出版《四角号码词典》并迅速普及全国,无疑王云五作出了重要贡献.  相似文献   

论美术类图书分编与CIP数据标引的统一   总被引：1，自引：0，他引：1  

郭映红 《大学图书情报学刊》2004,22(2):65-66

美术类图书的特色管理要求有与之相适应的分编方式,专业突出是其特点.图书在版编目(CIP)是一项对书目数据进行整体规范控制的工作,它的广泛运用对实现书目数据共享起重要作用.文章针对美术院校图书分编时导入CIP数据所引发的问题,提出相应的解决方法.  相似文献   

关键词标引的若干问题探讨   总被引：15，自引：1，他引：14  

丁春 《编辑学报》2004,16(2):105-106

分析关键词标引中存在的若干问题,探讨关键词与文献主题、标题词、专业术语、主题词、自由词的关系,提出提高关键词标引质量的对策.  相似文献   

Reliably Assessing Growth with Longitudinal Diagnostic Classification Models     

Matthew J. Madison 《Educational Measurement》2019,38(2):68-78

Recent advances have enabled diagnostic classification models (DCMs) to accommodate longitudinal data. These longitudinal DCMs were developed to study how examinees change, or transition, between different attribute mastery statuses over time. This study examines using longitudinal DCMs as an approach to assessing growth and serves three purposes: (1) to define and evaluate two reliability measures to be used in the application of longitudinal DCMs; (2) through simulation, demonstrate that longitudinal DCM growth estimates have increased reliability compared to longitudinal item response theory models; and (3) through an empirical analysis, illustrate the practical and interpretive benefits of longitudinal DCMs. A discussion describes how longitudinal DCMs can be used as practical and reliable psychometric models when categorical and criterion‐referenced interpretations of growth are desired.  相似文献   

医学文献主题标引中副主题词使用问题分析     

田梅 《中华医学图书馆杂志》2008,17(2):41-43

对医学文献标引中关于副主题词使用的常见错误进行了分析,通过实例说明副主题词的修饰限制作用,并对副主题词的使用规则进行了探讨,对提高副主题词标引质量提出了建议。  相似文献