降维理念在生物学大概念教学中的应用     

庄志雄  吴佐建 《生物学教学》2020,(4):24-26

本文将人工智能深度学习领域的降维理念应用于生物学大概念教学,通过采取特殊降维到一般、资料降维到模型、事实降维到本质等教学策略,进行基于降维思维的大概念章节备课,促进大概念课程目标的达成。  相似文献   

国际科研众筹项目的特征描述、主题分析及属性对比:基于Experiment平台的发现     

刘周颖  赵宇翔  巴志超  吴聪  朱庆华 《图书情报知识》2020,(3):71-82

[目的/意义]为了深入了解科研众筹平台中的项目情况,本文对科研众筹项目的基本特征、研究主题和不同类型科研众筹项目的属性对比进行研究。[研究设计/方法]首先对科研众筹的起源、价值和运作模式进行了梳理;随后爬取了科研众筹平台Experiment的项目信息,并对该平台中科研项目的发起者、背书者、项目记录、所属学科、资助情况等进行特征描述;基于LDA模型对科研众筹项目主题进一步细化,并对不同资金筹集和不同主题分类情况下的科研众筹项目的属性差异进行比较分析。[结论/发现]科研众筹主题主要集中在生物学和生态学两个领域,不同资金筹集达成情况的科研众筹项目在项目背书者数量、信息记录次数和讨论次数上具有显著差异;不同主题的科研众筹项目在其讨论次数上具有显著差异。同时,是否提供视频和是否参与资助挑战在不同资金筹集达成情况和不同主题的科研众筹项目上均具有显著差异。[创新/价值]深入分析了科研众筹平台中项目主题及属性对比情况,对科研众筹平台优化信息审核机制、社交机制和信息展示机制具有一定的参考价值。  相似文献   

全民健身服务体系中公益与商业的协调互动研究*     

徐〓惠  符〓壮 《广州体育学院学报》2019,(3):31-33

自从1996年国务院提出“全民健身工程”的概念之后，全面健身在全社会掀起了一股热潮，然而20多年过去了，全民健身这项公益事业的规模和水平还远未满足人民群众的要求，因此，今天人们又重新提出构建全民健身服务体系的新思路。全民健身对于政府来说是一项重要的公益事业，政府投入全民健身工程建设应以社会效益为其关注点。全民健身又是一个拥有庞大市场的商机，企业参与全民健身服务体系建设则应在公益法规之下获取有限的公益利益。平衡政府与企业间的利益才能真正使政府资金和民间资本协调配合，促使全民健身服务体系快速完善地构建起来。  相似文献   

Exploring askers’ switching from free to paid social Q&A services: A perspective on the push-pull-mooring framework     

Zhouying Liu  Yuxiang Zhao  Si Chen  Shijie Song  Preben Hansen  Qinghua Zhu 《Information processing & management》2021,58(1):102396

The purpose of this study is to explore the factors that prompt askers to switch from free to paid social question-and-answer (SQA) services. Prior studies have investigated users’ motivations and participation in free and paid SQA services; however, little attention has been paid to askers’ switching behavior. We empirically analyzed the content of qualitative interviews from 64 askers on a well-known SQA platform in China. Based on the push-pull-mooring framework, we identified and classified factors that influenced askers’ to switch from free to paid Q&A services, using the critical incident technique, after which we calculated the entropy weights of the 16 subcategories before and after the switch, using the entropy weight method. The findings suggest that askers’ switching behavior was influenced by push factors (i.e., dissatisfaction with the free SQA service), pull factors (i.e., satisfaction with the paid SQA service), and mooring factors (i.e., social factors, personal factors, situational factors). Moreover, the findings show that the effects of these factors vary significantly before and after a switch. Dissatisfaction with the quality of information from the free SQA service would influence users before a switch, whereas satisfaction with the quality of information from the paid SQA service would influence them after a switch. In terms of mooring factors, the effects of social and personal factors on askers’ switching behavior, especially subjective norms and cognitive lock-in, turn out to be less significant after a switch, whereas the effect of trust is more significant. Besides, the effects of situational factors are more or less the same before and after a switch. To the best of our knowledge, this paper is one of the first attempts to explore factors that affect askers’ switching behavior and to shed light on the managerial strategies of paid SQA services.  相似文献   

Coupled matrix factorization and topic modeling for aspect mining     

Ding Xiao  Yugang Ji  Yitong Li  Fuzhen Zhuang  Chuan Shi 《Information processing & management》2018,54(6):861-873

Aspect mining, which aims to extract ad hoc aspects from online reviews and predict rating or opinion on each aspect, can satisfy the personalized needs for evaluation of specific aspect on product quality. Recently, with the increase of related research, how to effectively integrate rating and review information has become the key issue for addressing this problem. Considering that matrix factorization is an effective tool for rating prediction and topic modeling is widely used for review processing, it is a natural idea to combine matrix factorization and topic modeling for aspect mining (or called aspect rating prediction). However, this idea faces several challenges on how to address suitable sharing factors, scale mismatch, and dependency relation of rating and review information. In this paper, we propose a novel model to effectively integrate Matrix factorization and Topic modeling for Aspect rating prediction (MaToAsp). To overcome the above challenges and ensure the performance, MaToAsp employs items as the sharing factors to combine matrix factorization and topic modeling, and introduces an interpretive preference probability to eliminate scale mismatch. In the hybrid model, we establish a dependency relation from ratings to sentiment terms in phrases. The experiments on two real datasets including Chinese Dianping and English Tripadvisor prove that MaToAsp not only obtains reasonable aspect identification but also achieves the best aspect rating prediction performance, compared to recent representative baselines.  相似文献   

设计最优化学习环境:OECD研究的视角     

庄承婷 《远程教育杂志》2011,29(2):77-83

设计最优化学习环境是面向21世纪的"适应性教育"所提出的要求,它有助于学习者形成"适应性能力"。OECD的研究认为,要善于提炼新学习的基本特征,这就是主动建构、自我调节、情境相依和协同努力。与此相连的新学习本质观主张:在学习过程中学习者应积极投身于学习活动中,持续努力,确保成功;重视学习者已有知识,强化知识组织,形成合理的知识结构与线索,形成一种完整的知识图景;遵循信息加工能力的限制条件,重视学习中动机、情感与认知的动态交互;培养学习者理解概念、通晓程序和自我调节的协调能力,致力于达到学习迁移的效果。为此,设计最优化学习环境的基本原则是:生本教学、自我调节;注重交往、善用合作;关注动机、情知相依;利用旧知、因人施教;富有挑战、减负增效;紧扣目标、不断反馈;学科融合和内外互通。  相似文献   

基于Agent的远程教学系统模型建构   总被引：11，自引：0，他引：11  

庄慧娟  张仁津  林筑英 《现代教育技术》2004,14(6):55-58

Agent 是人工智能和计算机软件领域中一种新兴的技术,其在远程教育中的应用具有很大的优越性。本文在分析传统的基于 Web 远程教育不足的基础上探讨了用 Agent 思想解决远程教育的问题,并设计了一个基于 Agent 的远程教学系统模型。  相似文献   

在活动中加强学生的思想教育     

李玉祥 《天津教育》2021,(2):32-33

学生的教育包括德智体美劳各个方面,其中德育占据了首要地位,一个人的思想问题是首要问题。国家的教育政策,把培养人的问题摆在首位,社会主义的教育方针,根本问题是为谁培养人,培养什么样的人。一个国家的文明程度,在一定程度上取决于这个国家公民的思想觉悟程度以及文化修养水平。因此,要提高学生的思想道德修养,培养他们成为一个有文明、有礼貌的社会主义接班人。具体的教学实践过程当中,先培养学生如何去做人,然后培养他们学习科学文化知识,让他们能够全面发展。学生的思想认识提高了,他们的言谈举止、行为习惯就合乎校规校纪,内在的心灵之美也就体现出来了。  相似文献   

构建有效课堂提升核心素养——以《多样的交通》为例     

廖玉香 《天津教育》2021,(8):61-62

核心素养是指学生在接受教育过程中,逐步形成的终身发展和社会发展需要关键能力和必备的品格,是关于孩子个人修养、社会关爱、家国情怀以及自主发展、合作参与、创新实践等综合表现,在深化课程改革、落实立德树人根本任务中处于首要位置。发展学生的核心素养,需要教师去落实,《道德与法治》课程是基于立德树人的教学,是发展学生核心素养重要途径。  相似文献   

Readers extract semantic information from parafoveal two-character synonyms in Chinese reading     

Zhu  Mengyan  Zhuang  Xiangling  Ma  Guojie 《Reading and writing》2021,34(3):773-790

Reading and Writing - In Chinese reading, the possibility and mechanism of semantic parafoveal processing has been debated for a long time. To advance the topic, “semantic preview...  相似文献