信号处理中的数据压缩评价指标研究   总被引：1，自引：0，他引：1  

高永丽 《楚雄师范学院学报》2008,23(3)

数据压缩的最终目标就是在不损失或尽量少损失有用信息的前提下,获得尽可能大的压缩比.而压缩算法的优劣,则是通过压缩性能指标进行评价的,本文阐述了各种压缩指标在评价压缩算法上的应用和特点  相似文献   

本科教学评估症结的改革     

柳友荣 《大学.研究与评价》2008,(10):22-25

我国高等教育评估经历了试点实验,全面展开两个阶段,现已取得阶段性成效。针对当前我国高等教育评估的症结,应该速择以下路径进行改革:加强高等教育的分层研究;用法规规范评估活动;发挥核心利益相关者的作用;形成我国新的高等教育评估主体;注意评估方式选择与评估定位的一致;推动评估专家队伍的认证。  相似文献   

高职学生在线学习投入量表构建与实证分析     

刘超  王召义  江芳 《天津市教科院学报》2021,(2):57-63

学生的学习行为投入是影响学习效果的重要因素。为了了解疫情防控期间高职学生在线学习行为投入现状,在学习行为投入、在线学习行为投入内涵界定及测量研究的基础上设计了6个维度的高职学生在线学习行为投入测量量表,并基于学校电子商务学院2018级237名学生在安徽省网络课程学习中心(e会学)平台上进行在线学习的系统后台数据以及课后针对学习过程调查的问卷数据,对20个测量指标进行描述性分析、阶段性变化分析以及与终局性在线考试成绩进行相关分析。最后提出有效激发学生在线学习行为投入的实践启示,包括强化线上教学的过程管理;丰富线上教学设计,激发学生学习积极性;坚持线上教学的高要求。  相似文献   

中国高校分类标准及指标体系设计   总被引：7，自引：0，他引：7  

CHEN Hou-feng 《高等教育研究》2008,(6)

高校分类标准是指用来区分高校性质、任务、能级的准则和参照系,是用于判断高校类型和层次的定性化尺度;高校分类指标是指在分类标准基础上用于测量或反映高校性质、任务、能级及发展现状的数量指征。高校分类标准及指标,应当从输入、多元的视角来设计。本文尝试从培养目标及学科专业、人才培养、科学研究、社会服务、学生成份、教师队伍、经济(地理)区域、宏观管理等八个维度,来设计中国高校的多元分类标准及指标体系。  相似文献   

School effectiveness or the horizon of the world as a laboratory   总被引：1，自引：0，他引：1  

Romuald Normand 《British Journal of Sociology of Education》2008,29(6):665-676

The present paper aims to provide an account of the genesis and development of a collection of scientific work that has received strong international recognition – the paradigm of school effectiveness. It shows how this theory, based on the design of measurement tools, has gradually influenced educational management and policies in promoting the effectiveness and quality of educational systems. In mobilising allies, setting up laboratories and extending its networks into major international organisations, school effectiveness research has contributed to the emergence of a new form of governance of education systems at a European level and to the promotion of new assessment methods of research in education.  相似文献   

开放政府数据评估方法与实践研究——基于《全球开放数据晴雨表报告》的解读     

姜鑫  马海群 《现代情报》2016,36(9):22-26

本文以全球首个全面系统地评估开放政府数据项目——“开放数据晴雨表”作为实例,从评估框架、评估对象、评估方法与指标体系等方面,对国际组织的开放政府数据评估项目进行了比较分析。结合国际组织开展的针对开放政府数据的政策评估实践活动,从政策制定、执行、评估和反馈的政策过程视角针对我国开放政府数据提出了政策建议。  相似文献   

Random Permutation Testing Applied to Measurement Invariance Testing with Ordered-Categorical Indicators     

Benjamin A. Kite  Terrence D. Jorgensen  Po-Yi Chen 《Structural equation modeling》2018,25(4):573-587

We describe and evaluate a random permutation test of measurement invariance with ordered-categorical data. To calculate a p-value for the observed (?)χ², an empirical reference distribution is built by repeatedly shuffling the grouping variable, then saving the χ² from a configural model, or the ?χ² between configural and scalar-invariance models, fitted to each permuted dataset. The current gold standard in this context is a robust mean- and variance-adjusted ?χ² test proposed by Satorra (2000), which yields inflated Type I errors, particularly when thresholds are asymmetric, unless samples sizes are quite large (Bandalos, 2014; Sass et al., 2014). In a Monte Carlo simulation, we compare permutation to three implementations of Satorra’s robust χ² across a variety of conditions evaluating configural and scalar invariance. Results suggest permutation can better control Type I error rates while providing comparable power under conditions that the standard robust test yields inflated errors.  相似文献   

A preliminary study of multiple college admission criteria in Taiwan: the relationship among motivation,standardized tests,high school achievements,and college success     

Tzu-Ling Hsieh 《高等教育研究与发展》2019,38(4):762-779

ABSTRACT

A new college admission policy will be implemented in Taiwan in 2022. The purpose of this study was to understand the relationship between admission criteria and college success. Data was obtained from the Taiwan Higher Education Database; a sample size of 8443 students from 156 universities was used in this study. By using the structural equation model, this study tested a research model that included factors such as motivation, standardized test scores, high school achievements, and college success. The findings revealed that the General Scholastic Ability Test scores (in Chinese, English, Social Studies) and high school average academic grades are significantly associated with college success. A student’s motivation to complete a certain major can significantly predict the quality of student effort and influence college success. These findings highlight the importance of some admission criteria and provide practical implications for educational policy-makers, school administrators, students, and parents.  相似文献   

构建公共教育支出绩效评价指标体系的研究     

成刚  袁佩琦 《继续教育研究》2007,(6):149-151

教育支出绩效评价是现代公共教育管理的核心制度,其推行的难点在于如何建立一套指标科学度量教育支出的绩效。本文从绩效评价的内涵出发,根据教育本身的特殊性,构建了一套能全面有效度量教育支出绩效的指标体系。  相似文献   

校园网络安全初探     

张艳 《黔东南民族师专学报》2005,23(4):52-53

在建立健全校园网网络安全组织与制度的基础上，提高校园网用户的网络安全意识，搭建以防火墙为核心，结合入侵监测、网络防病毒、数据备份一恢复和身份认证等系统的有效的网络防范体系。  相似文献