Results 141 to 150 of about 45,674 (256)
ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
基于Illumina 高通量测序的马来熊(Helarctos malayanus)粪便菌群多样性初探
应用新一代高通量测序技术Illumina Miseq对上海动物园3只马来熊的12个粪便样本中的菌群结构及其多样性进行检测和分析。样中共检测到884522条序列,共检测到15个菌门,主要有7个优势菌门,按照多样性高低依次是:厚壁菌门(Firmicutes)(54.70%)、变形菌门(Proteobacteria)(41.90%)、梭杆菌门(Fusobacteria)(1.80%)、蓝藻菌门(Cyanobacteria)(0.70%)、放线菌门(Actinobacteria)(0.20%)、拟杆菌门 ...
袁耀华刘群秀裴恩乐
doaj
洪泽湖是我国第四大淡水湖,然而关于洪泽湖大型底栖动物的报道较少。为了研究洪泽湖大型底栖动物群落结构特征及其影响因子,在洪泽湖设置20个采样点,进行了为期1周年的季度调查(2010年5月-2011年2月)。共采集到大型底栖动物14种,寡毛类、摇蚊科幼虫和软体动物分别有5种(占总物种数的35.7%)、3种(21.4%)和6种(42.9%)。河蚬为第一优势种(优势度Y=0.18),其次分别为苏氏尾鳃蚓(0.09)、羽摇蚊(0.07)、霍甫水丝蚓(0.06)和铜锈环棱螺(0.06 ...
张堂林 +4 more
core
ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley +1 more source
California Renewables Portfolio Standard And Its Experiences For China [PDF]
在当今能源产业中,发展可再生能源技术,提高可再生能源产业比重是大势所趋。为支持和促进可再生能源发展,美国加州已经制定相对全面的能源政策体系,其中,可再生能源配额制(以下简称为“配额制”)是加州能源政策的重要组成部分。据此,本文从实证角度出发,采用辩证分析方法,探索加州配额制政策历史,充分研究加州配额制政策内容,分析加州配额制的成就与缺憾,并在此基础上为我国配额制的实施建言献策。 本文除引言和结语外,共分为四章。 第一章介绍加州配额制的背景情况。本章首先对配额制的概念、理论基础、 发展情况进行说明 ...
张美玲
core
ABSTRACT As the Narrative Policy Framework (NPF) begins to unpack issues of power and narratives, the main focus has been on power‐over and domination rather than more transformative notions of power‐to and empowerment. This article draws on insights from gender and policy studies and suggests that the NPF benefits from adopting a multifaceted notion ...
Hilda Broqvist
wiley +1 more source
采用样线法于2013年11月~2014年1月对西昌学院北校区校园5种生境(乔灌林、疏林灌丛、草丛、水域、建筑区生境)的鸟类组成进行调查,共记录鸟类57种,隶属7目26科。留鸟43种,夏候鸟7种,冬候鸟4种,旅鸟4种; 古北界13种,东洋界34种,广布种10种。白鹭、[树]麻雀、黑喉红臀鹎为校园鸟类优势种。对5种生境鸟类多样性分析结果表明:乔灌林鸟类多样性指数(H=3.025)最高,建筑区鸟类多样性指数(H=1.669)最低; 乔灌林与疏林灌丛的相似性指数(Cj=0.538)最高,乔灌林与水域的相似性 ...
杨 岚 亓东明 王 静 唐 伟 冯 茜 袁 丽
doaj
Geographical Variation in Vegetative Growth and Sexual Reproduction of the Invasive Spartina alterniflora [PDF]
生物入侵是全球变化的重要内容,对全球经济和环境产生严重影响,并威胁生态系统的多样性。明确生物入侵发生的过程和机制可以有效地防控入侵生物带来的危害。繁殖是入侵种从定居到其后扩张过程中的一个重要的内在因素,进而可能影响入侵的成功。在入侵种扩散并占据广阔的地理分布区过程中,表型可塑性可能起到关键作用。揭示入侵种繁殖和表型可塑性在变异及其与环境因子的相关关系,对阐明外来物种的入侵机制和预测其分布具有重要的意义。互花米草原产美国大西洋沿岸和墨西哥湾,于1979年从美国引入中国。经过30多年的入侵和扩散 ...
刘文文
core
The Inclusion Trade‐Off: Comparing the Design and Functionality of Collaborative Governance Forums
ABSTRACT Environmental challenges require collaboration across jurisdictions, often through forums or intermediary spaces for repeated interaction. A persistent forum design question concerns inclusion criteria, or which actors should be included.
Adam Wiechman +3 more
wiley +1 more source

