基于移动终端的物品识别系统设计

介绍基于移动终端的物品识别系统设计。采用图像提取与分离技术,结合计算机及数据库相关技术,对手机拍摄图片进行处理分析,以确定图像对应物品,并通过检索查询获取物品相关详细信息,方便消费者购物、商家信息发布等,推动电子商务发展。     

赵翼史实研究的新坐标——评赵兴勤教授《赵翼年谱长编》

赵兴勤教授新近出版的《赵翼年谱长编》（全五册）,是一部富含创新意识、具备较高学术水准的厚重之作。它的出版,是清代文学研究的新创获,代表近年国内外赵翼研究的前沿水平。是书之学术贡献,约有如下三端：一是对谱主传世作品逐一加以编年考订,使读者能比较清晰地看出赵翼思想演进的轨迹;二是将赵翼交游人物考订出95％以上,纠正各书疏漏达上百处之多;三是在文献考订上,凸显出“细”“慎”“精”三个特点。     

电子信息专业信号处理系列基础课程的建设与改革实践

信号处理系列基础课程是电子信息专业的学科基础课程。文章分析了信号处理系列基础课程体系与教学内容的优化整合方法,介绍了信号处理系列基础课程整合后的教学改革方法和手段、思路和成果。     

利用Monte Carlo方法与渐进展开式近似计算ln2

本文从三方面讨论ln2的近似值的计算问题,首先从槡2的近似值出发通过构造函数估计ln2的近似值,其次利用Monte Carlo方法编写SAS程序近似计算ln2,最后利用ln2的一些渐进展开式近似计算ln2,所得结果有利于估计ln2近似计算中的误差和扩散学习思维。     

基于XML的主观题自动批阅系统知识库构建研究

介绍了主观题自动批阅系统(简称AATS)知识库在整个系统中的角色及其功能需求;阐述了具体领域学科的知识特点,提出按学科功能模块分类的树状结构模式来组织知识库,并把义项作为知识库的基本组成单位,进而定义知识库义项的概念表达式为一个有序四重组;给出AATS知识库的XML文档的DTD文件。实验表明,AATS知识库的这种结构组织模式可使主观题自动批阅的准确率大大提高。     

Investigating Linguistic Sources of Differential Item Functioning Using Expert Think-Aloud Protocols in Science Achievement Tests

Even if national and international assessments are designed to be comparable, subsequent psychometric analyses often reveal differential item functioning (DIF). Central to achieving comparability is to examine the presence of DIF, and if DIF is found, to investigate its sources to ensure differentially functioning items that do not lead to bias. In this study, sources of DIF were examined using think-aloud protocols. The think-aloud protocols of expert reviewers were conducted for comparing the English and French versions of 40 items previously identified as DIF (N?=?20) and non-DIF (N?=?20). Three highly trained and experienced experts in verifying and accepting/rejecting multi-lingual versions of curriculum and testing materials for government purposes participated in this study. Although there is a considerable amount of agreement in the identification of differentially functioning items, experts do not consistently identify and distinguish DIF and non-DIF items. Our analyses of the think-aloud protocols identified particular linguistic, general pedagogical, content-related, and cognitive factors related to sources of DIF. Implications are provided for the process of arriving at the identification of DIF, prior to the actual administration of tests at national and international levels.     

A systematic review of item response theory in language assessment: Implications for the dimensionality of language ability

The present study conducted a systematic review of the item response theory (IRT) literature in language assessment to investigate the conceptualization and operationalization of the dimensionality of language ability. Sixty-two IRT-based studies published between 1985 and 2020 in language assessment and educational measurement journals were first classified into two categories based on a unidimensional and multidimensional research framework, and then reviewed to examine language dimensionality from technical and substantive perspectives. It was found that 12 quantitative techniques were adopted to assess language dimensionality. Exploratory factor analysis was the primary method of dimensionality analysis in papers that had applied unidimensional IRT models, whereas the comparison modeling approach was dominant in the multidimensional framework. In addition, there was converging evidence within the two streams of research supporting the role of a number of factors such as testlets, language skills, subskills, and linguistic elements as sources of multidimensionality, while mixed findings were reported for the role of item formats across research streams. The assessment of reading, listening, speaking, and writing skills was grounded within both unidimensional and multidimensional framework. By contrast, vocabulary and grammar knowledge was mainly conceptualized as unidimensional. Directions for continued inquiry and application of IRT in language assessment are provided.     

论"连环计"故事在戏曲小说中的演化

本文在介绍“连环计”故事的史实依据的基础上,着重讨论这个故事在小说戏曲创作中的传承与演化,以及这些作品在审美趣味和对历史人物评价尺度等方面的差异;对其与传统思想文化的联系,也有所涉及。     

课程测验项目分析方法——以对外汉语课程测验为例

对外汉语课程测验属于标准参照性测验,应使用标准参照性测验理论体系下的技术指标对测验进行项目分析和评价,传统的分析方法（如区分度）不完全适用于课程测验的项目分析。本文使用该理论对北京语言大学汉语进修学院某次考试试卷进行分析,希冀为对外汉语教学提供一些有益的经验。实验结果表明：对“掌握者”和“未掌握者”来说,题目难度总体上可接受,大部分题目的区分性能良好,虽然有的题目略有“瑕疵”,但值得保留,以提高教学内容的测试覆盖面及测验信度。有7个题目过难或过易,几乎不具备区分性能,需要删除或修改。     

谈教育考试国家题库建设现状及展望

教育考试国家题库建设是我国教育考试"十一五"期间的一项重要工作任务。本文主要从国家教育考试题库建设的思想建设、制度建设、工作转轨、软硬件设备等几个方面对题库建设一期工作的开展情况进行了介绍,并对今后的题库建设工作进行了展望。