期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Minimizing Distance Using Just-in-Time Teaching and Flipped Classroom 被引量:1
1
作者 Mahmuda Akhter 《Sino-US English Teaching》 2015年第1期20-25,共6页
JiTT (Just-in-Time Teaching) and flipped classroom are two innovations in academia where high-tech and no-tech resources are blended to encourage more interaction and creativity among students. These two methods als... JiTT (Just-in-Time Teaching) and flipped classroom are two innovations in academia where high-tech and no-tech resources are blended to encourage more interaction and creativity among students. These two methods also help minimize the dependency on face-to-face lecture and make the class time more creative and effective. This study is the very first attempt of implementing these strategies in Bangladesh. It explores the prospect of JiTT and flipped classroom at tertiary level in Bangladesh. In the first part of this paper, recent studies on JiTT and flipped classroom are discussed to shed light on their effectiveness and problems. The latter part explains the data and research findings. Before collecting the data, JiTT and flipped classroom were used with 33 students of undergraduate level who were students of"ELT Methodology" course. After the implementation of the methods, a questionnaire survey was conducted to collect data regarding their response to these two methods. The study reveals that JiTT and flipped classroom help cover more topics in a short time while enhancing students' interaction and participation. They make students come to the class prepared and reflect on their learning. Teachers can understand students need better and provide required feedback. The overall interaction among students and teachers can be improved using JiTT and flipped classroom since everyone is clear about each other's existing knowledge and learning objectives. 展开更多
关键词 JUST-IN-TIME technology teaching strategies flipped classroom video lecture
下载PDF
径流输入性氮在生物滞留系统中的转化与归趋
2
作者 陈垚 朱嘉运 +2 位作者 余雪花 刘臻 袁绍春 《中国给水排水》 CAS CSCD 北大核心 2021年第23期129-138,共10页
为探究径流输入性氮在生物滞留系统多介质中的即时转化规律与归趋特性,以水、植物、土壤、微生物等多介质中的氮素为研究对象,采用^(15)N同位素示踪技术考察场次径流输入性氮在多介质中的即时赋存形态与含量,分析不同前期干旱天数(ADD)... 为探究径流输入性氮在生物滞留系统多介质中的即时转化规律与归趋特性,以水、植物、土壤、微生物等多介质中的氮素为研究对象,采用^(15)N同位素示踪技术考察场次径流输入性氮在多介质中的即时赋存形态与含量,分析不同前期干旱天数(ADD)形成的干湿交替条件下氮的转化特性与多介质归趋。结果表明,径流输入性NO_(3)^(-)-N可同时发生反硝化与硝酸盐异化还原成铵(DNRA)作用,且两者存在协同性。适当的干旱可促进气态氮排放,使其成为NO_(3)^(-)-N的主要归趋路径。但干旱也增加了淋洗排放风险,尤其是长期干旱(ADD=22 d)会抑制反硝化与DNRA作用,显著增加淋洗排放归趋分配比例(高达32.30%)。土壤对NO_(3)^(-)-N的非生物固定和微生物固持作用随ADD的增加而减弱,但长期干旱条件下根际耐干旱微生物成优势菌后可强化土壤的归趋作用,并通过协同竞争作用促进植物对NO_(3)^(-)-N的直接吸收。径流输入性NH_(4)^(+)-N在干旱条件下易以NO-3-N形式发生淋洗排放,但淋洗排放比例最大仅为0.34%。土壤对NH_(4)^(+)-N的归趋以微生物固持作用为主,且归趋分配比例显著高于NO_(3)^(-)-N。干旱期土壤含水率可调控微生物固持和非生物固定作用发生的空间与强度。植物对NH_(4)^(+)-N的吸收主要与植物生物量有关,且营养和水分双重胁迫作用会促进植物根系对NH_(4)^(+)-N的吸收。以上结果证实,不同形态氮在多介质中的即时转化路径和分配比例受ADD影响而存在较大差异,且长时间干旱易发生NO_(3)^(-)-N淋洗排放。 展开更多
关键词 生物滞留系统 海绵城市 径流输入性氮 ^(15)N同位素示踪 前期干旱天数 即时转化 多介质归趋
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部