探究性与验证性辨析:改变实验教学视点   总被引：1，自引：1，他引：0  

艾伦  李立文 《中国教育技术装备》2011,(9):3-5

从新课程标准的3项教学目标出发,分析以获取知识为目标的实验教学具有验证性特点,是通过对定理定律等结论的实验验证来巩固所学知识;以提高能力为目标的实验教学具有探究性特点,是通过对过程与方法的实验探究来提高各种能力。而数字化实验在探究性实验教学中起着很重要的作用。并且提出"提倡探究性实验,反对‘唯验证’性实验"的观点。  相似文献   

基于大型飞机的综合处理机综合验证系统研究     

杨涛  杨军祥  王纯委  刘宇 《大众科技》2015,(6)

综合处理机综合验证系统为综合处理机的综合测试和演示验证提供支持平台,文章介绍了基于大型飞机的综合处理机综合验证系统的实现。综合处理机作为航电系统的核心,在航电系统综合前对其先进行充分的综合测试验证,这将为航电系统的综合打下坚实的基础。  相似文献   

中文叙词表的语义化转换   总被引：1，自引：0，他引：1  

欧石燕 《图书情报工作》2015,59(16):110-118

[目的/意义]随着语义网与关联数据的兴起与发展,采用SKOS语言对叙词表进行语义化描述成为主流,这为叙词表在网络上的发布、共享以及在网络环境下的应用提供新的契机。[方法/过程]以《汉语主题词表》为例,对中文叙词表的语义化表示、验证和关联数据发布进行探索。首先,制定基于SKOS、SKOS-XL和SKOS扩展的叙词表语义化表示方案, 实现对叙词表的无损语义描述, 开发基于N-Triples格式的词表语义化转换程序, 使大规模词表的语义化转换更加简单高效;其次,采用新兴的SPIN框架对语义化词表的完整性进行验证, 为SKOS词表的正确性与合法性提供保证;最后,采用“Jena TDB+Fuseki+Pubby”的组合将SKOS/RDF词表数据在网络上发布为关联数据,并开发词表关联数据检索界面。[结果/结论]实验结果表明,采用本文的方法能够实现整个《汉语主题词表》的高效语义化转换、验证与发布,促进中文叙词表在网络上的共享与应用。  相似文献   

敦煌石窟海量数据无差错传输系统的设计与开发     

俞天秀  吴健  赵良  许丽鹏 《家教指南》2015,(3)

本文针对敦煌石窟数字化海量数据在实际工作数据传输过程中出现的问题,认为海量数据无差错传输技术,在敦煌石窟数字化过程中是非常重要的一项技术。敦煌石窟海量数据无差错传输系统的设计与开发,为了开发出实用性强的软件,首先针对敦煌石窟壁画数字化工作流程、分析摄影采集、图像处理和数据存储各阶段的特点,提出了敦煌石窟海量数据无差错传输系统的需求;其次,设计了敦煌石窟海量数据传输校验方案,针对敦煌石窟壁画数字化工作流程提出了层级式校验,依据该校验思想,设计了数据校验的整体框架并做了优化,最后设计出数据传输校验的详细模型,确保了数据传输的完整性;最后,基于上述方案,设计并实现了敦煌石窟海量数据无差错传输系统,利用 VisualStudio2010开发平台、C++程序开发语言完成系统的开发。此系统已在敦煌壁画数字化工作中实际应用,效果良好。  相似文献   

Determination of the centre of mass kinematics in alpine skiing using differential global navigation satellite systems     

Matthias Gilgien  Jörg Spörri  Julien Chardonnens  Josef Kröll  Philippe Limpach  Erich Müller 《Journal of sports sciences》2015,33(9):960-969

In the sport of alpine skiing, knowledge about the centre of mass (CoM) kinematics (i.e. position, velocity and acceleration) is essential to better understand both performance and injury. This study proposes a global navigation satellite system (GNSS)-based method to measure CoM kinematics without restriction of capture volume and with reasonable set-up and processing requirements. It combines the GNSS antenna position, terrain data and the accelerations acting on the skier in order to approximate the CoM location, velocity and acceleration. The validity of the method was assessed against a reference system (video-based 3D kinematics) over 12 turn cycles on a giant slalom skiing course. The mean (± s) position, velocity and acceleration differences between the CoM obtained from the GNSS and the reference system were 9 ± 12 cm, 0.08 ± 0.19 m · s^-1 and 0.22 ± 1.28 m · s^-2, respectively. The velocity and acceleration differences obtained were smaller than typical differences between the measures of several skiers on the same course observed in the literature, while the position differences were slightly larger than its discriminative meaningful change. The proposed method can therefore be interpreted to be technically valid and adequate for a variety of biomechanical research questions in the field of alpine skiing with certain limitations regarding position.  相似文献   

What Do School‐Level Scores From Large‐Scale Assessments Really Measure?     

Fiore Sicoly 《Educational Measurement》2002,21(4):17-26

Although assessments of mathematics, reading, and writing are assumed to measure distinct academic skills, this may be difficult owing to the pervasive influence of general ability on performance. Factor analyses of school-level data from 14 large-scale assessment programs revealed that 80% of the variance in mathematics, reading, and writing scores was due to a common, underlying factor. Multiple regression analyses confirmed that scores contribute little information that is unique to a particular subject (6% or less). Although different assessments may create the illusion of providing unique information, they may be tapping into generic cognitive abilities that cut across content areas. These results raise suspicions about the value and validity of interpretations based on school-level subject area scores.  相似文献   

Motivation to Become a Teacher: a Norwegian Validation of the Factors Influencing Teaching Choice Scale     

Katrine Nesje  Christian Brandmo  Jean-Louis Berger 《Scandinavian Journal of Educational Research》2018,62(6):813-831

The act of newly qualified teachers leaving the profession is a growing challenge, both in Norway and internationally. To address recruitment difficulties, there is a need for further knowledge of prospective teachers’ career motivations. The current study validated a Norwegian translation of the Factors Influencing Teaching Choice (FIT-Choice) Scale. Using a sample of 635 preservice teachers, confirmatory factor analyses were conducted. The results indicated that the translated scale offers a valid measure of Norwegian students’ motivation to become teachers. Self-perception of teaching-related abilities was one of the main motivational sources, together with the desire to shape the future of children and adolescents and an interest in teaching. Findings are discussed in relation to previous studies based on the FIT-Choice Scale in other countries.  相似文献   

SVD-LSSVM and its application in chemical pattern classification   总被引：1，自引：0，他引：1  

TAO Shao-hui CHEN De-zhao HU Wang-ming 《浙江大学学报(A卷英文版)》2006,7(11):1942-1947

INTRODUCTION Pattern classification is an important problem in the machine learning field and least squares support vector machine (LSSVM) proposed by Suykens is an easy and powerful tool for this problem (Suykens and Vandewalle, 1999a). Only a set of linear equations should be solved during training of an LSSVM, which makes it easy to be realized. LSSVM is based on structural risk minimization (SRM) rule, which en- hances its generalization ability. SRM rule requires that model …  相似文献   

Disagreement over the best way to use the word ‘validity’ and options for reaching consensus     

Paul E. Newton  Stuart D. Shaw 《Assessment in Education: Principles, Policy & Practice》2016,23(2):178-197

The ability to convey shared meaning with minimal ambiguity is highly desirable for technical terms within disciplines and professions. Unfortunately, there is no widespread professional consensus over the meaning of the word ‘validity’ as it pertains to educational and psychological testing. After illustrating the nature and extent of disagreement, we consider three options for reaching consensus: to eliminate its ambiguity by agreeing a precise technical definition; to embrace its ambiguity by agreeing a catchall lay usage; and to retire ‘validity’ from the testing lexicon.  相似文献   

学习型组织构面与检验方法研究     

李明斐  卢瑜佳 《科技与管理》2006,8(2):55-58

基于对我国管理情境下的组织特征的分析，提出了我国学习型组织包含创新型文化、知识管理体系、优化的组织结构和战略性领导力4个构面。在此基础上，提出了检验学习型组织构面的程序，并着重对统计检验方法进行了探讨。并对今后的研究工作进行了展望，为进一步修正和完善学习型组织的4个构面提供了研究思路，为创建具有中国特色的学习型组织提供了理论与方法的指导。  相似文献