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Two‐phase flow and near‐critical phenomena are likely to enhance energy transport in high‐temperature hydrothermal systems. We present a series of two‐dimensional simulations of two‐phase flow of pure water at near‐critical conditions. The results show that at near‐critical conditions, two‐phase convection can be more efficient in transporting energy than single‐phase convection. The highest heat fluxes are attained when two‐phase heat‐pipes form near the bottom boundary, recharging the root of the upflow zone and thereby enabling the formation of broad upflow regions. When the system becomes more vapor‐dominated, it loses this ability, upflow zones become narrower and the energy efficiency drops to more moderate values.  相似文献   
23.
论东汉中后期士人的群体心理   总被引:2,自引:0,他引:2  
东汉中后期七人群体的形成是儒家经学的极盛这一特定历史时代的产物,是东汉中后期一个重要的社会群体。这一群体的成员通过心理和感情的交流,形成自己的群体心理,产生了心理相容、群体规范、群体凝聚、类化趋向等群体心理现象。它是我们研究东汉中后期社会状况与历史变迁的一个新的角度和方法。  相似文献   
24.
Debates concerning the development of the green economy necessarily focus on “upstream” issues that underpin the re‐structuring of national and regional economies through the lenses of financial, institutional and regulatory change. However, the growing interest in the cultural green economy requires a re‐scaling of debates surrounding the links that occur in complex socio‐technical systems, notably between individual consumers, social units and the architectures of the developing green economy. This necessitates a research and policy agenda that is attentive to both the complexities of such interactions (between structures, processes and practices) and the imperative to foster change in practices within wider society. This article explores the ways in which environmental social scientists have examined and evidenced these issues, arguing that two major barriers still exist for creating adequate understandings and opportunities for change. First, the overt focus on the individual consumer as a unit of measurement and political attention has stifled debate concerning the ways in which environmentally related social practices have developed in association with wider economic contexts. In this way, environmental social scientists have often failed to make the connections between individuals, practices and the economic system. Second, in adopting a largely individualistic perspective, environmental social scientists have tended to focus their attention on incrementalist and narrowly defined views of what ecological citizenship might look like and constitute in the green economy. The article therefore argues that environmental social scientists need to constructively engage in a new inter‐disciplinary dialogue about the role, purpose and ethics of citizen participation in developing and sustaining the green economy in an age of climate change and potential resource scarcity.  相似文献   
25.
This paper opens up a dialogue between mindfulness and the discipline of geography. As a meditative practice that cultivates ‘present-centred non-judgmental awareness’, we claim that the practices and insights of mindfulness have important implications for various forms of geographical enquiry. This paper argues that mindfulness can inform geographical practices in relation to epistemology and methodology, and contribute towards geographically informed critical psychological theory and action. More specifically, we claim that mindfulness could offer a practice-based context to support the study of affects, extend the application of psychoanalytical geographical methods beyond the therapeutic, and contribute to emerging geographical studies of behavioural power and empowerment. This analysis explores these sites of interaction through a series of reflections on the Mindfulness, Behaviour Change and Engagement in Public Policy programme that was developed and delivered by the authors. This more-than-therapeutic mindfulness programme has been delivered to approximately 47 civil servants working in the UK Government.  相似文献   
26.
关于宗教信仰的心理基础及心理特点考察   总被引:1,自引:0,他引:1  
阿忠荣 《攀登》2005,24(4):96-98
宗教信仰心理缘起于人的依赖感和利己思想,它又具有臆造性等特点;宗教心理与道德合致,从而不受时空地域之限,持续地发挥其作用。  相似文献   
27.
国内外地名研究的批判主义转向,注重地方命名时地方意义的生产、再生产以及争夺。文章以黄岩岛地名的演变为例,研究其地名变迁背后的政治博弈。研究表明:①黄岩岛的地名演变是中、西方话语体系下国际行为主体政治角力的过程。②中国的黄岩岛地名演变彰显的是中国对其无可争辩的主权;西方殖民者的黄岩岛地名演变展示近代以来对南海及其周边地区的殖民统治;菲律宾当局对黄岩岛的更名,谋求建构国家认同、侵占更多海洋岛礁资源。③地名是集体记忆解构与重构的纽带和国家权力博弈的指示物。中国对内应增强国家认同感和民族凝聚力,唤起中华民族的集体记忆,对外提升国际话语权,通过国际舞台阐释对南海主权维护的法理依据和坚强决心。  相似文献   
28.
The number of computerised tomography (CT) investigations of mummies has increased since the first published study in 1979. However, this approach has never been validated. We present a critical analysis of the literature (1979 to 2005). Relevant articles were selected via a MedLine search and analysed according to CT technique, methodology, and author's speciality. Thirty‐one original articles matched our selection criteria. Of these studies, 42% were authored by radiologists, while 26% had no contribution from radiologists. Hypothesis‐driven papers comprised only 9.7% of the total. While 84% of the studies had a stated purpose for conducting the CT study, only 67% of studies defined their CT protocol clearly. CT was used to study mummification techniques in 74% of instances, and/or to detect disease in 58%. Conclusions based on CT analysis were derived in 84% of studies, but only 32% of these answered specific questions. Furthermore, only 36% of these conclusions were related to the stated purpose of the study. Using the criteria of the grading system we developed, we found that 61% of studies were supported only by weak evidence. We conclude that evidence‐based research with better design should be encouraged in future palaeoradiological studies. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   
29.
孙松 《神州》2012,(31):110-112
As an attempt to explore the role of reading in EFL writing classes,the paper aims to prove appropriate reading sections can contribute to writing improvement in EFL context and provide a series of EFL writing instructional recommendations based on the analysis of theoretical and pedagogical perspectives associated with the relationship between reading and writing,the contributions of reading in EFL writing classes as well as the critical reviews of reading-assisted writing.  相似文献   
30.
This article argues that, although psychoanalysis and history have different conceptions of time and causality, there can be a productive relationship between them. Psychoanalysis can force historians to question their certainty about facts, narrative, and cause; it introduces disturbing notions about unconscious motivation and the effects of fantasy on the making of history. This was not the case with the movement for psychohistory that began in the 1970s. Then the influence of American ego-psychology on history-writing promoted the idea of compatibility between the two disciplines in ways that undercut the critical possibilities of their interaction. The work of the French historian Michel de Certeau provides theoretical insight into the uses of incommensurability, while that of Lyndal Roper demonstrates both its limits and its value for enriching historical understanding.  相似文献   
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