菲涅耳波带片成像时的像点分析

菲涅耳波带片可使入射光会聚起来，产生极大的光强，使点光源形成一系列的实像点和虚像点，其作用如同透镜成像。利用半波带分析法可分析菲涅耳波带片对称轴上的点光源通过菲涅耳波带片成像时像点在对称轴上的分布及 焦距的变化情况。     

The Uncertain Future for Digital Visual Collections in the University

Digital documents in the networked information environment fundamentally change the ways that visual materials can be used in education and scholarly discourse. These new uses raise questions about research library strategies with regard to digitized visual materials as a part of their collections, challenge assumptions underlying intellectual property rights for images and their scope, and offer ways in which visual literacy can become a more integral part of the common educational experience.     

文学欣赏的境界

文学欣赏是一种特殊的精神活动,达到的是一种精神升华的境界。在欣赏过程中,欣赏者注视着的是具体的艺术形象,文学欣赏是对形象艺术的感悟过程,在这个感悟过程中,欣赏者应始终是对文学作品的整体艺术的感受,而不是局部的寻章摘句,如仅仅盯住某个细节、某个动作,就不能感受到整部作品的特征。从某种意义上讲艺术作品创造欣赏者,因此,在进行文学欣赏时,一定要选择最为优秀的作品,——“取法乎上”。     

基于关键词价值细分的高价值热点主题识别方法研究

对作者关键词进行价值细分研究,有助于识别学科高价值研究热点主题,帮助研究者们精确把握高价值研究主题和学科研究前沿。本文引入营销领域客户价值细分RFM (recency,frequency,monetary)模型,对各个指标进行动态加权,多次实验后,形成多组关键词价值细分结果;从关键词生命周期的角度,结合医学领域的生存分析方法,使用Kaplan-Meier曲线和Logrank检验验证,识别出最优价值细分结果;依据帕累托原则和聚类算法得到高价值热点主题。数据源选择CSSCI (Chinese Social Sciences Citation Index)收录的图情档领域期刊论文,对1998—2019年的题录数据进行实验。相较于已有的热点主题识别方法,本文的识别结果考虑了关键词的价值属性和分类,较好地识别了高价值热点主题。     

汉语自动分词研究的发展趋势

汉语自动分词是计算机中文信息处理中的难题。文章通过对现有分词方法的探讨，指出了汉语自动分词研究未来的发展趋势，即传统文本的有效切分，计算机技术的快速发展，改造书面汉语书写规则。参考文献35。     

标志中图像和文字的组合式样及意义表述方式

标志中图形可以分为图像系统和字系统进行研究，一是确定图像和字之间的建构模式，二是确定图形和字之间谁为主要概念和谁为次要概念，以及主次概念在视觉选择过程中对标志内涵的理解方式。     

中文电子病历的分词及实体识别研究

[目的/意义]健康医疗大数据是我国重要的基础性战略资源，本研究对中文电子病历分词与实体识别的探讨与实证较好地完成了医疗数据的信息抽取任务，对今后医疗大数据在语义层面的应用发展具有重要意义。[方法/过程]本研究首先融合权威词表、官方标准、健康网站数据及其他医学补充词库构建了词语数量级达到10万的医学词表；然后对电子病历的字段进行分词，对比了jieba工具、导入词典后的jieba、无监督学习及AC自动机4种模型的分词效果；最后，以自动分词和人工标注结果为语料，实现基于条件随机场的电子病历实体识别研究，并比较不同实体类别以及不同文本特征下的实体识别效果，选出最优模板。[结果/结论]分词结果显示，AC自动机的效果最好，F值可达82%；实体识别结果表明，"检查"和"疾病"实体的识别效果最好，而"症状"的识别效果不太理想。     

Exploring Verbal,Visual and Schematic Learners' Static and Dynamic Mental Images of Scientific Species and Processes in Relation to Their Spatial Ability

The current study compared different learners’ static and dynamic mental images of unseen scientific species and processes in relation to their spatial ability. Learners were classified into verbal, visual and schematic. Dynamic images were classified into: appearing/disappearing, linear-movement, and rotation. Two types of scientific entities and their related processes were investigated: astronomical and microscopic. The sample included 79 female students from Grades 9 and 10. For the purpose of the study, three instruments were used. The Mental Images by Guided Imagery instrument was designed to investigate participants' visualization of static and dynamic mental images. The Water-Level Task was adopted to estimate participants' spatial ability. The Learning Styles Inventory was used to classify participants into verbal, visual and schematic learners. The research findings suggest that schematic learners outperformed verbal and visual learners in their spatial ability. They also outperformed them in their vividness of microscopic images; both micro-static and micro-dynamic images; especially in the case of appearing/disappearing images. The differences were not significant in the case of astronomical images. The results also indicate that appearing/disappearing images received the least vividness scores for all three types of learners.     

Correlation analysis-based image segmentation approach for automatic agriculture vehicle

INTRODUCTION In recent years,harvesting crop by combine has become more and more popular in China.In2003,combines were used to harvest23%of rice and71%of wheat.The work described here is part of a pro-ject aimed at researching automatic combines who follow the cut-uncut edge of the crops automatically to reduce the driver’s fatigue from the intensive work.Much attention has been focused on vision-bas-ed automatic agriculture vehicle.Image segmenta-tion is the key to extracting the guida…     

积极践行“三个代表”重要思想 公道正派搞好组织人事工作

本文结合自己的工作实际,畅谈学习“三个代表”重要思想,开展“树组工干部形象”活动的重要意义及落实其要求的五项具体措施。