环境工程专业“环境化学”课程双语教学改革的实践与思考

双语教学是我国高校建设双一流大学的重要途径。本文结合环境工程专业的特点和人才培养需求,分析了环境化学课程双语教学的必要性和存在的问题,提出了启发-递进式教学模式、优选英文教材、优化教学内容、构建网络平台和建立多元化考核制等多种方法相结合的教学改革措施。     

Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi_(1-y)/2Fe_yMg_(1-y)/2O₃–(x)CaTiO₃ (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μ_B/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10⁻⁷ s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.     

高师"初等几何研究"课程改革的实践与认识

针对基础教育改革的现实和高师"初等几何研究"课程存在的问题,就本课程的改革进行了探索.具体从课程体系方面:突出学生利用几何知识进行问题解决和几何建模的能力等;从教学内容方面:强调高初结合和对中学几何知识缺陷的补充等;从教学模式方面:高师数学课堂的"自主·合作·创造"模式三方面对改革的实践进行了总结.     

衡水湖国家级自然保护区湿地景观格局演变分析

基于1987年、1997年和2005年3期TM遥感数据,对衡水湖的湿地景观空间格局及其演变进行分析,结果表明：该区域以农田为景观基质,水体和芦苇沼泽交错分布构成区域湿地生境的主体斑块,其余景观类型呈以小尺度斑块散布于区域中。保护区湿地景观改变较明显,湿地由1987年的20.2%上升到1997年的23.4%,2005年占到22.3%,农田向湿地类型的转变最为显著,农田和湿地类型之间的动态转换关系很大程度上决定了保护区土地利用结构和景观格局的演变。从景观类型水平来看,表现为水体的平均斑块面积增加,由1987年的3.5187hm²减到1997年的2.0187hm²到2005年为4.3997hm²,破碎度指数下降;聚合度指数和最大斑块指数先降后升,而连接度指数先增后减;芦苇沼泽平均斑块面积下降明显,由1987年的2.6169hm²降到1997年的0.5437hm²,到2005年为0.3558hm²,且形状日趋复杂自然,最大斑块指数和聚合度指数持续减少,而连接度指数的变化趋势则相反,但总体上芦苇沼泽沼泽小面积斑块数量仍占相当比例,破碎化程度仍维持较高水平。在景观整体水平上,保护区的景观多样性和均匀度指数呈缓慢上升趋势,破碎化指数由1987年的51.068增到1997年的74.0985后2005年减为37.88,以农田为景观基质的蔓延度指数则先降后升。景观格局分析表明,衡水湖保护区湿地面积逐步恢复,破碎化程度降低且景观日趋多样化,连通性虽不及1987年历史最高水平却呈加强趋势,湿地生境质量得到优化,2005年湿地恢复的景观格局的空间配置达到3个时期的历史最高水平,也体现了保护区规划管理取得一定成效。     

福建10种甲壳动物凝集素的研究

10种甲壳动物凝集素提取液 ,用 11种天然或经酶修饰的动物及人红细胞进行凝血活性检测 ,同时进行凝集素的糖抑制、热稳定性、pH及Ca2 影响试验 .结果表明 ,每种甲壳动物提取液至少凝集 10种以上天然或经酶修饰的红细胞 .各类红细胞经酶 (蜗牛酶 )修饰后对凝集素的敏感性普遍增强 (人和家鸽红细胞对几种甲壳动物例外 ) .某些种类的凝集素对兔红细胞的凝集活性可被一种或几种糖抑制 .8种凝集素表现出对 pH值和温度的广泛适应性 ,在pH3- 11、温度为4℃ - 90℃范围内对兔血均具凝集活性 .10种凝集素的凝集活性依赖于Ca2 .     

Xu Beihong and the New China: thoughts centered on the painting At the World Peace Congress

This essay analyses a politically tinged painting by Xu Beihong (1895–1953), a representative modern Chinese painter. He composed the work in 1949, just before the founding of the People’s Republic of China, or the New China. In this article’s discussion of the perplexing work, the author attempts to unveil Xu’s understanding of revolution and of the relationship between art and politics, in relation to his difficulties in exploring and practicing art in the early Republic period (1912–1949). Based on this, the author discusses the painter’s mindset in the social and political context of the New China. She also tries to reveal that Xu’s art practices were restrained by the realities he was in – a crucial point to understanding his achievements and predicaments. As an artist who resisted the western modernism in the course of modernization, and who idealistically pursued the highest good and beauty through “realist” approaches and historical expressions, Xu’s predicaments interestingly reflect the complicated relationship between art and revolution in China’s road to modernization, and provide a foundation for further explorations into the core issues and the particularity of modern Chinese paintings.     

成人学习与教育提升健康与幸福,促进社会和谐发展——专访联合国教科文组织终身学习研究所亚历山德鲁·盖纳博士

世界各国均已认识到,成人学习与教育在促进健康和幸福、劳动力市场、社会包容和共同体生活等方面发挥着重要作用.与此同时,全球公民一致认为教育是一种人权,自身也存在一种价值.成人学习与教育能给个体公民、家庭和共同体带来好处.成人学习与教育帮助公民在公民社会和政治生活中变得更加活跃、多样性包容、更多环境问题意识.它还能促进从艺术到精神层面的文化发展,帮助公民在塑造社会的过程中更加多才多艺和足智多谋.我们有幸对联合国教科文组织终身学习研究所亚历山德鲁·盖纳(Alexandru Gaina)博士进行了专访,分享其对成人学习与教育方面的思考与见解.亚历山德鲁·盖纳博士满腔热情地关注健康、幸福和跨领域问题,特别强调成人学习和教育在这些领域的作用,促成全球、区域和国家层面的利益相关者协同解决全球关注的问题,实现共同目标.目前,盖纳博士是联合国教科文组织终身学习研究所成人学习和教育团队成员,其主要任务之一是组织第六届成人教育国际大会的中期回顾会议(Mid-Term Review of the Sixth International Conference on Adult Learning and Education,CONFINTEA-VI Mid-Term Review).     

Wuyutai＇s Tea Moon Cakes

From a single centennial shop to over 300 chains studding northern China and radiating nationwide, the past fifteen years witnessed Wuyutai＇s rapid development and grand achievements, its shared journey with alliance businesses and its efforts to deepen and widen tea market, Whenever and wherever, first-class products and services are essential to success. Looking into the future,     

Meet In Beijing Arts Festival Gets Under Way

<正>From April 30 to May 28, artists from around the world will present an art gala for the audience in Beijing. This year, the annual Meet In Beijing Arts Festival will highlight the interaction between artists and audiences, with an aim to promote diversity of art forms and cooperation among arts groups, arts institutions, government agencies and arts professionals and provide opportunities for their sustainable development.     

华君武结缘楼外楼

那枝用作战斗利器挥舞一生的画笔,永远地停下了。2010年6月13日上午9点,漫画大师华君武在北京友谊医院离世。＂我是杭州人,1915年出生于杭州祖庙巷。＂去看2007年《漫画一生·华君武作品展》的人们,一进展厅就看见一代艺术大师向每个老乡的介绍词。