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1.
崔继东 《天津教育》2021,(1):114-115
在初中化学复习课教学的过程中,为了加深学生对化学知识的理解,教师要合理运用思维导图的教学模式,将琐碎的知识点以图文的形式展现在学生面前,方便学生记忆的同时还能标注出知识的重点与难点,促使学生能高效解答实验习题。基于此,本文主要围绕初中化学复习课应用思维导图开展分析,并阐述了应用对策,仅供参考。  相似文献   
2.
Yemen has witnessed decades of political unrest and the current armed conflict has significantly impacted human development. The economic activity has been severely disrupted which in turn affected the delivery of public services including the financing and operation of the higher education system (HE), where efficiency was negatively impacted.The purpose of this research is to investigate the extent of which the internal efficiency of the Yemen HE has been affected. This will be achieved through analysing the main three domains of teaching and learning activities as well as the impacts of the adopted policies by HE management. Structured interviews with standardized closed-ended and open-ended questions were conducted online with 51 academics who have been purposely selected. Despite the devastating effects of the armed conflict, the HE has continued to perform its duties, providing space for learning and contributing effectively in social cohesion. Nonetheless, the education process has been impacted quantitatively and qualitatively.Yemen has been deprived of its well-qualified human capital, and the brain-drain is still ongoing. The continuity of conflict will yield a generation who is either uneducated or poorly educated, and this will in turn continue feeding the violence and jeopardizing Yemen’s future.This paper represents a first attempt to study the effects of Yemen’s armed conflict on HE. Future research should shed light on tracing students who abandoned education as well as the level of knowledge, skills and competencies of those lately graduated. The multi-dimensional effects of brain-drain are equally important.  相似文献   
3.
在线健康社区用户参与行为的影响因素研究综述   总被引:2,自引:0,他引:2  
[目的/意义]在线健康社区是健康问题关注者交流经验、知识和情感的重要平台,而用户参与是社区发展的关键。对用户参与行为的影响因素进行综合评述,可为这方面研究提供系统参考。[方法/过程]从信息生态系统的综合视角出发,分别从信息人、信息、信息技术和信息环境4个维度,系统评述用户参与行为影响因素和影响机理的主要成果和研究现状。[结果/结论]用户参与行为受到信息人、信息、信息技术和信息环境各维度的综合影响,相关成果比较丰富,已经形成较为成熟的研究主题。从社区类型、用户类型、持续参与等方面对未来研究趋势进行展望。  相似文献   
4.
陈小卉  胡平  周奕岑 《情报学报》2020,39(4):450-458
社会化问答社区的出现改变了原有的问答模式并拓展了知识获取的途径。回答者作为知识的主要贡献者,是促进问答社区内知识传递的核心要素。现有关于问答社区用户的研究普遍以用户的属性数据为依据,较少考虑使用个体连接所形成的关系数据进行分析。本文以中文问答社区"知乎"为研究对象,爬取了"流行音乐"和"英语学习"两个话题下的大规模数据,通过构建回答者关注关系网络,定义和量化直接连接和间接连接两类同伴关系,使用网络自回归模型探究同伴效应对知识贡献行为的影响。研究发现,回答者的知识贡献行为会受到直接和间接连接同伴效应的正向影响,但是间接连接同伴效应会随着回答者网络密度的增加而逐渐减弱甚至消失,聚类系数对回答者的知识贡献行为有负向影响。  相似文献   
5.
《Sport Management Review》2020,23(5):783-796
Over the past decade, the field of sport-for-development (SFD) has experienced significant growth and diversification across research and practice. In this review paper, the authors provide a comprehensive analysis and discussion of the theoretical and conceptual developments within SFD, addressing a gap in the literature. Following a sport-focused review of SFD literature, the authors first identify five theoretical and conceptual frameworks that have emerged from within the SFD space. As a second step, they analyze and discuss scholarly work that has utilized these theories and frameworks. Building on a comparison of key messages, themes, and concerns, the authors highlight that to date, limited SFD scholarship has truly applied, extended, or challenged existing frameworks and conceptualizations. Motivated by this review, they posit several conceptual advancements, and offer directions for future research and theoretical development.  相似文献   
6.
CBA2016-2017赛季常规赛已经结束,通过数据分析法、逻辑分析法等对20支队伍在常规赛38轮的比赛数据(如攻防效率、主场优势、与季后赛队伍和非季后赛队伍比赛的差异、每节净胜分、逆转能力)进行统计分析。针对中国男篮在攻防效率,球队队员的心理承受能力及外援的引进等方面提出发展对策,旨在为CBA及中国男篮的发展提供理论参考。  相似文献   
7.
摘要:运用文献资料、调查问卷、比较分析等方法,对不同历史时期我国田径优势项目训练理念与实践进行研究,探讨了对田径项目特征、训练理念、训练周期、训练手段、训练负荷等认识上的变化。研究认为: 1)借鉴先进的训练理论与经验,在重新认识项目特征的基础上,突破传统束缚,形成科学的训练理念,围绕专项需要,创新、优化训练手段和负荷,形成独特的技术风格,是我国跳高、投掷、跨栏等项目获得阶段性优势的主要原因。2)我国跳高水平的下滑,主要是由于对快速助跑的训练理念在运动员多年训练中没有很好体现,运动员缺乏长远规划,对训练方法、技术细节、个人特点及负荷的过程控制不够重视,对高水平运动员的训练没有新的突破,限制了项目的发展。3)近来我国女子优秀投掷选手的出手速度与90年代鼎盛时期存在明显差距,失去了动作快、出手快的特点,下肢灵活性、爆发力不足,基本功不扎实,最大力量不能有效转化为专项速度,影响了选手的成绩高度。4)中长跑项目上巨大的反差并一蹶不振,说明我们在耐力项目上并没有形成稳定、先进的理论、理念,对训练的认识仍然停留在方法、手段、负荷的改变上,盲目的大负荷量和高强度,缺乏深刻的运动生物学理论支撑。同时显示出对高水平运动员、运动队的管理、培养体系还不够健全。5)改变对周期及训练负荷的看法,形成小运动量、高强度和以赛带练的训练理念;用神经系统和肌肉的协调用力观念指导训练,并深刻认识项目特点,以速度为核心强化专项训练,形成领先的技术优势,促进了我国男子跨栏项目的发展。刘翔的伤退及成绩断层,则说明对顶级运动员的训练负荷、比赛规律和过程控制的把握还有失精准,表明我国高水平运动员的科学训练监控和发展体系需要进一步加强。6)在实践中,对新的训练理论与理念认识不深,在训练中特别是青少年的训练中不能系统的体现,在很大程度上影响了我国优势项目的进一步发展。  相似文献   
8.
This systematic review is built on the seminal work by the New London Group in 1996. Few endeavours have synthesized findings of empirical studies pertaining to the effects and challenges of multiliteracies practices in various schooling and geographical contexts. Through a five-point Likert scale and a deductive and inductive thematic analysis, we conducted a systematic review of 66 multiliteracies articles from the ProQuest® database. These studies were empirical, qualitative/mixed-method, and ranged from 2006 to 2015. Findings show a burgeoning number of multiliteracies studies occurring in 15 countries, with Canada being the most prominently involved. Our evaluation of the reviewed studies was generally favourable with strengths identified in researchers’ articulation of pertinent theoretical frameworks and connections to existent literature. Our findings refer to insufficient information of data collection and data analysis in a certain number of papers. We also elaborate on major affordances, challenges, and oversights of the multiliteracies practices as reported by the reviewed studies and discuss implications for future multiliteracies research, policies on literacy education, and teacher education in diverse contexts.  相似文献   
9.
网络在线评论对于商家和顾客具有重要价值,因而日益受到虚假评论行为的冲击。作为两个重要的在线评论领域,产品类评论(如亚马逊、淘宝)和店铺类评论(如点评网、Yelp)在语言特性、评论行为等方面存在显著差异。虽然研究者们已提出大量针对产品类虚假评论的检测方法,但对于店铺类虚假评论的研究仍然较少。针对Yelp.com网站上旅店、饭店有标注的点评数据,提取并分析各种评论欺诈特征,利用多种有监督学习方法进行虚假评论检测。实验结果表明,检测精度最高可达74%,AUC值可达75%。虽然店铺类虚假评论具有极强的隐蔽性,但通过权衡检测精度和召回率,可利用有监督学习方法对店铺类虚假评论进行有效检测。  相似文献   
10.
Smart cities employ information and communication technologies to improve: the quality of life for its citizens, the local economy, transport, traffic management, environment, and interaction with government. Due to the relevance of smart cities (also referred using other related terms such as Digital City, Information City, Intelligent City, Knowledge-based City, Ubiquitous City, Wired City) to various stakeholders and the benefits and challenges associated with its implementation, the concept of smart cities has attracted significant attention from researchers within multiple fields, including information systems. This study provides a valuable synthesis of the relevant literature by analysing and discussing the key findings from existing research on issues related to smart cities from an Information Systems perspective. The research analysed and discussed in this study focuses on number of aspects of smart cities: smart mobility, smart living, smart environment, smart citizens, smart government, and smart architecture as well as related technologies and concepts. The discussion also focusses on the alignment of smart cities with the UN sustainable development goals. This comprehensive review offers critical insight to the key underlying research themes within smart cities, highlighting the limitations of current developments and potential future directions.  相似文献   
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