不同天气条件下古尔班通古特沙漠南缘梭梭(Haloxylon ammodendron)群落能量通量日变化特征

基于2018年夏季在古尔班通古特沙漠南缘采用波文比系统实测的气象及能量资料,分析该区不同天气条件下梭梭群落能量特征及能量分配的日变化特征。结果表明：1） 该区夏季晴天和多云天各能量曲线变化趋势基本一致,呈单峰型,土壤热通量最小,晴天和多云天感热略高于潜热;阴天能量传输以感热为主;雨天整体热通量最小,且各能量曲线呈多峰形变化,能量传输以潜热为主。2） 白天,波文比值雨天最小,且小于1,晴天、多云天、阴天依次增大,且大于1;夜间,晴天、阴天、多云天、雨天的波文比值依次增大,均小于1。3） 不同天气条件下能量分配曲线白天变化平稳,夜间波动显著,日出和日落前后波动最为剧烈;因不同天气条件下辐射强度和日照时数的不同,曲线早、晚剧烈变化开始时间有所不同。     

Awkwardness of becoming a boundary object: Mangle and materialities of reports,documentation data,and the archaeological work

Information about an archaeological investigation is documented in an archaeological report, which makes it the boundary object par excellence for archaeological information work across stakeholder communities such as field archaeologists, heritage managers, and land developers. The quality of reports has been a subject of debate, and recently it has been argued that more emphasis should be placed on making primary research data at least similarly available. This study explores the changing materialities and reciprocal formation of documents and their users with the advent of digitization, and how documents form and lose their status as boundary objects in these processes. The study posits that in order to be functional, a boundary object needs to provide a disclosure that makes it accessible to cognate communities. Further, it shows how assumptions about the functioning of the human and nonhuman (material artifacts) influence the ways in which archaeologists conceptualize the preservation and archiving of archaeological information and the role and potential of different types of digital and paper-based documents. This article is based on an interview study of Swedish archaeology professionals (N = 16) with theoretical underpinnings in the notions of boundary objects, mangle of practice, and disclosure.     

试论近代来华传教士中国报道与研究对西方世界的影响

近代来华传教士对中国进行大量的报道与深入研究,并留下众多相关的西文著述,这些活动对西方世界产生重要影响。具体表现在为殖民者起情报搜集作用、为西方政府和差会等机构提供决策参考、对西方大众起到知识信息传递的作用、对西方宗教界与信徒民众起传教的鼓噪作用及对西方尤其是美国汉学的近代转型起推动作用等方面。深刻反映了近代传教士文化传播者与沟通者的角色属性;也折射出近代东西方文化交流的时代特征。     

解析我国地震谣言报道的公共性——以2010年四个地震谣言传播过程为例

2008年汶川地震以来,地震谣言常见诸媒介.本文从地震谣言的公共属性出发,从受众和媒介两方面作了详细分析.一方面,汶川地震以来,我国社会对生存环境的感知方式和社会心理发生了改变,另一方面地震谣言报道并未基于受众的感知和心理将地震谣言视为公共事务加以报道,因而出现了一个媒介舆论和公众话语的鸿沟.出现这种情况的部分根由在于我国新闻实践在向公共新闻的转变过程中,观念的转变和从业人员的素质无法与公众的要求同步.     

试论体育新闻报道的二律背反现象

立足当前体育新闻报道发展的实践,详细分析了体育新闻报道中的二律背反(即专业化和去专业化并存)现象及其产生的原因。此基础之上,还针对当前体育新闻报道存在的误区进行了探讨,以期为当前中国体育新闻报道实践提供一定的指导。     

新一代天气雷达运行能力评估研究

研究我国新一代天气雷达运行能力的评估方法,建立天气雷达运行能力评估指标体系,合理地选取现有的新一代天气雷达数据资料,定量地评估各型号、分时段的雷达业务可用性、可靠性、可维修性及其变化趋势.编制能反映雷达运行能力的各类评估图表,并以图表的分析为依据,提出今后发展建议.     

A Critical Discourse Analysis of News Reports Concerning Huang Yan Island Dispute

To find out different discourse features of these two different news reports and different ideologies reflected in the these two news reporting,Fairclough’s three-dimensional model of critical discourse analysis is adopted as the basic theoretical framework.And a contrastive analysis of news reports concerned with Huang Yan Island dispute from Reuters and Xinhua is carried out.The data of this article is collected from the official website of Reuters and Xinhua respectively,including one news report on Huang Yan island dispute from Reuters and two news reports from Xinhua.By comparing and analyzing the news resources reporting mode,the hidden political,historical and cultural ideologies behind the news discourse can be exposed.And Fairclough’s three-dimensional model of critical discourse analysis is an useful tool for interpreting the news reports to explore the hidden ideology.     

Medical and health informatics services during and after the COVID‐19 pandemic should be virtual,tailored, responsive and interactive: a case study in Belgium

This is part of a new series in this regular feature regarding trends in the provision of information by health science libraries. By sharing expertise and drawing together relevant trends the series intends to serve as a road map for both health science librarians and health informatics professionals. This article shows how a medical and biomedical research library changed practices, and reassessed user needs for the COVID‐19 emergency. Discusses changes to online education (and collaborative working) to provide user‐friendly services, researcher support tailored to need and re‐visioning library space. J.M.     

从“唐慧案”女性形象的逆转看新闻报道的民粹化倾向

通过对＂唐慧案＂中唐慧女性形象前后逆转的媒介镜像分析,发现民粹主义思潮已触及新闻媒体。媒体报道的民粹化倾向,离不开当今各阶层差距悬殊的大背景,以及强势群体的话语缺失、草根群体的舆论施压、传统新闻框架的影响。作为舆论引发和引导的主力,媒体民粹化的报道倾向助推了民粹主义思潮的勃兴,严重威胁社会稳定。     

杜甫选择秦州寓居的体质原因

杜甫于肃宗乾元二年七月携眷来到秦州。诗人选择秦州寓居的原因,除投亲靠友外,尚与自己的体质有关。杜甫属于畏热体质,他要选择一个比较凉爽的地方作为落脚之处,以使自己的畏热体质能够适应当地的气候环境。而秦州气候凉爽,因而成为杜甫西行的首选之地。