周期性外力作用下双头分子马达运动机制研究     

赵阿可  李晓凤 《河南职业技术师范学院学报》2011,(3):60-63

讨论了双头分子马达在白噪声及反馈控制的作用下,系统加周期性外部驱动力时,流随弹簧的原长、弹性系数及温度的变化.流随弹簧原长呈现周期性的变化,存在最优的弹性系数使流达到最大,它对温度的变化非常敏感.通过分析该环境中双头分子马达的运动机制,充分说明各个参量之间的相互协调能够反映出生物体机制的高度复杂性、协调性.  相似文献   

How can students’ academic performance in statistics be improved? Testing the influence of social and temporal-self comparison feedback in a web-based training environment     

Marine Delaval  Nicolas Michinov  Olivier Le Bohec  Benjamin Le Hénaff 《Interactive Learning Environments》2017,25(1):35-47

The aim of this study was to examine how social or temporal-self comparison feedback, delivered in real-time in a web-based training environment, could influence the academic performance of students in a statistics examination. First-year psychology students were given the opportunity to train for a statistics examination during a semester by doing online exercises in a web-based training environment. Once connected, students received in real-time either social comparison feedback (their score was compared to the mean score of all first-year students) or temporal-self comparison feedback (their score was compared, week by week, with their own previous score). The fact that students were free to connect to the web-based training environment heightened self-regulation differences such as academic procrastination, which was considered as a moderating variable in this study. Because academic performance was measured, the students’ background in mathematics and statistics was also controlled. Irrespective of the students’ background, the results reveal a positive influence of social comparison feedback on statistics exam performance, but only among students who did not delay doing exercises in the web-based training environment. By contrast, temporal-self comparison feedback did not have any effect on performance. Some recommendations for optimizing the efficacy of web-based training environments can be proposed, taking into account both social comparison feedback and academic procrastination.  相似文献   

Ego depletion negatively affects knowledge retrieval in secondary school students     

Chris Englert  Alex Bertrams 《教育心理学》2017,37(9):1057-1066

In the present study, we tested the assumption that performance in a knowledge retrieval test would be lower in secondary school students with temporarily depleted self-control strength (n = 53) compared to secondary school students with temporarily available self-control strength (n = 56). After manipulating self-control strength, students were instructed to memorise the names and the functions of the human eye and to recall as many names and functions as possible following a one-min distraction task. The results supported our assumptions, as students with depleted self-control strength performed significantly worse in the knowledge retrieval task compared to students whose self-control strength had not been temporarily depleted. The results suggest that depleted self-control strength may negatively affect academic performance and hinder a successful academic career. The theoretical and practical implications of these findings are discussed.  相似文献   

From copying to learning: using exemplars to engage students with assessment criteria and feedback   总被引：3，自引：2，他引：1  

Karen Handley  Lindsay Williams 《Assessment & Evaluation in Higher Education》2011,36(1):95-108

Feedback is central to pedagogic theory, and if feedback is to be effective, students need to engage with it and apply it at some point in the future. However, student dissatisfaction with feedback – as evidenced in the National Student Survey – suggests that there are problems which limit student engagement with feedback, such as their perception that much of their feedback is irrelevant to future assignments. This article reports on a study which sought to enhance engagement by giving students exemplar assignments annotated with feedback before submission of their final assignments. This was done by providing an online facility where students could view exemplars and post comments or questions to tutors and peers on a discussion board. The exemplar facility was highly valued by students, although there were no quantitative effects such as an increase in students’ assignment marks when compared with the previous cohort. The article reflects on possible reasons for this result and discusses ways to improve the exemplar facility, for example by facilitating dialogue between tutors and students. The article concludes with lessons learned about how to construct exemplars, and considers how exemplars might also be used within marking teams to improve consistency of marking.  相似文献   

促进学习评估中的反馈的效能及其提升策略     

祝新华 《课程.教材.教法》2011,(4)

反馈是十分重要的教学行为,更是为促进学习的评估所倍加强调的。只论说反馈内容要具体、语言要准确,教师并不能掌握反馈的要领。教学实际中的反馈效能,是一个从正面到负面的连续体。有效反馈的策略,包括聚焦、互动、适时、目标导向、去个性化、尊重差异、积极跟进等。  相似文献   

数学学优生与学困生两种抑制能力的比较研究     

张丽华  尚小铭 《辽宁师范大学学报(社会科学版)》2011,34(1):34-37

以小学五年级学生为被试,选取数学学优生30名,数学学困生32名,通过设计不同条件的负启动实验,对两组被试的分心抑制能力和记忆提取抑制能力进行了比较。结果表明：（1）数学学困生在特性抑制和记忆提取抑制上显著差于学优生;（2）与学困生相比,数学学优生对存在于知觉水平的干扰物反应更快。  相似文献   

信息检索中快速索引文件的设计研究     

王长青 《佳木斯教育学院学报》2011,(2):427+429-427,429

索引文件是检索效率的关键,本文首先针对索引文件的流程进行了设计,然后分析了索引文件的建立和存储设计,并进一步研究了索引文件的合作与优化设计。希望本文的研究能为检索系统中的索引文件研究提供一定的参考借鉴作用。  相似文献   

学习、生成与反馈:基于动觉智能图式理论的广告智能创作     

姜智彬  戚君秋 《新闻大学》2020,(2):1-16,119

人工智能技术颠覆了传统广告运作中的创作逻辑。研究者以动觉智能图式理论为研究框架,以中国广告市场上的智能创作项目为个案研究对象,分析了文字、图像、视频三类广告的智能创作系统,提炼出广告智能创作的学习、生成与反馈模型,以及贯穿其中的机器创作逻辑。未来广告智能创作有三个重要的发展方向:一是创作内容从传统基础性表达转向人机协同的智能创作;二是创作策略从短期产品创作型转向长期品牌创作型;三是广告公司跨越智能化鸿沟向垂直化或行业化发展。  相似文献   

Encouraging Knowledge Transfer in Food Science and Nutrition Education: Suggestions from Cognitive Research     

Megan A. Sumeracki  Yana Weinstein-Jones  Cynthia L. Nebel  Shelly J. Schmidt 《Journal of Food Science Education》2019,18(3):59-66

For several decades, cognitive psychologists have been studying how we learn, and from this work it becomes possible to identify ways to help students learn in the classroom effectively. Importantly, this work does not just inform how to memorize facts, but also how to learn complex material in a way that allows students to apply what they are learning in future situations. The laboratory to classroom model used by many researchers to apply cognitive psychology to real educational situations, such as classroom learning and students’ independent studying, is described first. Then the focus turns to important issues within education, such as students’ ability to transfer knowledge to new situations and understand complex material. Finally, three learning strategies are discussed (concrete examples, elaborative interrogation, and retrieval practice) that instructors can implement to help students to both acquire knowledge and apply it to new situations, integrating examples from food science and nutrition.  相似文献   

安徽省高校图书馆发展的现状、问题与对策——基于图书馆一站式检索的调查     

丁正祁  张峰 《阜阳师范学院学报(社会科学版)》2015,(2)

文章通过对安徽省29所普通本科院校图书馆的一站式检索平台建设现状进行调查,分析存在的问题,并对进一步完善图书馆一站式检索服务提出一些建设性意见。  相似文献