Serrated lithium fluoride nanofibers-woven interlayer enables uniform lithium deposition for lithium-metal batteries

The uncontrollable formation of Li dendrites has become the biggest obstacle to the practical application of Li-metal anodes in high-energy rechargeable Li batteries. Herein, a unique LiF interlayer woven by millimeter-level, single-crystal and serrated LiF nanofibers (NFs) was designed to enable dendrite-free and highly efficient Li-metal deposition. This high-conductivity LiF interlayer can increase the Li⁺ transference number and induce the formation of ‘LiF–NFs-rich’ solid–electrolyte interface (SEI). In the ‘LiF–NFs-rich’ SEI, the ultra-long LiF nanofibers provide a continuously interfacial Li⁺ transport path. Moreover, the formed Li–LiF interface between Li-metal and SEI film renders low Li nucleation and high Li⁺ migration energy barriers, leading to uniform Li plating and stripping processes. As a result, steady charge–discharge in a Li//Li symmetrical cell for 1600 h under 4 mAh cm⁻² and 400 stable cycles under a high area capacity of 5.65 mAh cm⁻² in a high-loading Li//rGO–S cell at 17.9 mA cm⁻² could be achieved. The free-standing LiF–NFs interlayer exhibits superior advantages for commercial Li batteries and displays significant potential for expanding the applications in solid Li batteries.     

体育智库建设的国际经验与中国路径

对发达国家体育智库建设进行研究,梳理和总结了发达国家体育智库建设概况,探讨了其成功经验,针对我国体育智库建设的现状,提出了体育智库建设的路径选择。研究认为:发达国家体育智库大体分为政府型体育智库、独立自治型体育智库、高校附属型体育智库三类,发挥着知识和权力沟通桥梁、体育决策民主化平台、体育政策落实监护人等功能;政府的重视扶持、坚持研究独立性、合理的管理体制、完善的运行机制、严格的行业管理等是其发展的重要经验;最后根据体育全面深化改革的现实从体育智库的法之根基、术之利器、权之制衡、道之要义四个层面提出了相应的建设路径。     

对国外化学实验教学网站信息呈现方式的浅层分析

通过对国外化学实验教学网站信息呈现方式进行考察,划分不同教学资源类型和三种网站信息组织形式,重点针对网站信息的载体特征和表征方式,以及对国内实验教学的启示进行分析.     

面向智能时代的中小学在线教学:现状、趋势与政策建议

在疫情防控进入常态化背景下,如何精准、有效提升教师在线教学能力,如何实现在线教学从疫情期间的应急性教学向常态化教学线上线下混合转变,成为值得关注的重要议题.基于调查数据发现,目前在线学习环境、教师在线教学能力发展、在线教学评价、教师多重角色等都具有显著的智能时代特征,面向智能时代的中小学在线教学技术与课程的融合呈现创新发展的新趋势.我国中小学在线教学亟须通过顶层设计、依托"新基建"行动实现由"技术应用"迈向"知识创造".     

Innovations in creative education for tertiary sector in Australia: present and future challenges

Abstract

Recent significant changes in technology such as Artificial Intelligence (AI) and big data analysis have a wide impact in many areas of human societies, not least in education. Advances in efficiency of new technologies, with impacts in renewable energy and transport affected by environmental concerns and climate change mitigation, demand a reassessment and adjustment of the industrial structure of the economy. Technological advances enhancing creativity and analytical skills mean people must learn and adapt to a fast-changing economic environment. This paper present some key changes in Australian educational areas in recent years that are important and relevant to the subject of education innovation and philosophy to achieve outcomes in training and sustainable economic development, as anticipated by the community and government. Education courses and curricula in many countries have been transformed by technological advance. It is the swift incorporation of new technologies that best prepares students for the dynamics of economic and social change. Even though technological responsiveness is not a new phenomenon, it is established that the teaching methods found to be most successful include complementary and supplemental courses producing multi-skilled and creative graduates. These courses are delivered with significant emphasis upon self-development skills and are less focused upon traditional content. A move toward horizontal focus and a student-centric balance is the current trend, displacing vertical over-specialisation of learning. Yet, the central role of educator is seen as still appropriate and necessary where the aim is to equip graduates with creative and adaptive skills.     

黄河上游兰西城市群人口时空特征多维透视

明确区域人口时空演化特征,有助于推动人口高质量集聚。本文以多源数据为基础,采用人口重心、标准差椭圆、人口分布结构指数、人口-土地一致性系数、空间自相关分析和GIS空间统计分析等方法,从城市群整体、县、乡（镇）和栅格尺度对兰州—西宁城市群人口时空特征进行分析,得出以下结论：①兰西城市群人口呈现规模小、流动性弱、城镇化水平低、人口和城镇化率小幅缓慢增长等基本特点。②人口重心略微西移,人口分布“西北—东南”走向的空间格局基本稳定,呈“核心—外围”式空间结构,兰州、西宁和临夏是3个人口集聚中心,其中兰州市显现出人口集聚的“虹吸效应”。甘青两片人口分布格局存在差异,甘肃片区人口密度中南部高、北部低,青海片区人口以西宁为中心向其他县域“圈层”递减。③海拔是影响兰西城市群人口垂直分布格局的主要地形因素,人口分布的高程梯度效应和河谷盆地集聚指向明显,人口主要集中在海拔低于2400 m的中海拔河谷盆地内。多尺度、多视角的研究结论及相应的对策建议,可为区域人口空间优化布局提供科学依据。     

城市中年空巢女性心理健康影响因素研究

本研究探讨团体归属感、家庭亲密度对此群体心理健康水平的影响。方法采用症状自评量表（SCL-90）、社会团体归属感量表、家庭亲密度和适应性量表（FACESⅡ）对广东6个城市的239名城市中年空巢女性进行测查。结果显示,心理健康水平与家庭亲密度、社会团体归属感呈显著负相关（p<0.01）,社会团体归属感在家庭亲密度对心理健康的预测中起部分中介作用。结论提示以提高家庭亲密度、社会团体归属感为切入,多方面提出对策以提高其心理健康水平。     

沿海区域“汽车营销实务”课程的教法

针对沿海区域“汽车营销实务”课程教学中存在的问题,激励推广“行动导向”、“4＋3”教学法,由学校转向企业教学。强调实训环节的教学,突出学生的技能实践,让学生直接进入汽车营销工作岗位的模式,实现“校企并轨”、“课岗一致”的要求,通过岗位指导,将理论融于其中,在顶岗教学过程中,加强理论、技能考核,达到企业教学目标。     

冀西北农村人力资源开发研究——关于坝上四县农村剩余劳动力合理利用模式的探讨

本研究的目的是撂讨冀西北坝上4县16万农村剩余劳动力如何在农业领域实现最佳配置和最有效利用问题。提出了"两业为主吸收"的农村劳动力合理利用模式。     

析句法理论与实践的再审视

运用比较的方法 ,介绍胡裕树、黄伯荣和廖序东、颜迈分别编著的《现代汉语》以及《中学教学语法系统提要》的析句法的要点、特点 ,分析“二分法”存在的问题 ,肯定“三分法”的合理性、实用性