首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   116篇
  免费   0篇
  国内免费   11篇
教育   52篇
科学研究   52篇
体育   10篇
综合类   1篇
信息传播   12篇
  2023年   3篇
  2021年   5篇
  2020年   7篇
  2019年   12篇
  2018年   13篇
  2017年   6篇
  2016年   2篇
  2015年   3篇
  2014年   11篇
  2013年   17篇
  2012年   11篇
  2011年   4篇
  2010年   4篇
  2009年   8篇
  2008年   8篇
  2007年   6篇
  2006年   1篇
  2005年   3篇
  2000年   1篇
  1996年   1篇
  1993年   1篇
排序方式: 共有127条查询结果,搜索用时 15 毫秒
31.
本文概废水中蕴含着大量能量,如何高效地回收利用这些能量对于满足世界能源需求,降低废水处理成本,提高污水处理的可持续性具有重要意义。微生物燃料电池(MFC)是近年来发展起来的一种从废水的有机污染物中提取能量的新型生物技术,有望实现废水处理的可持续性发展。然而,目前MFC技术离实际应用还有很长的距离。MFC系统的扩大化问题是阻碍该技术实际应用的关键。本文详细讨论了MFC扩大化过程中的主要问题和挑战,并提出了未来的发展方向。MFC与其他技术结合可以实现较高的出水水质或获得高商业价值的化学品,然而该方面的研究才刚刚起步,要实现其实际应用还需要解决许多问题,包括如何提高生产效率,提高经济可行性,提升系统的稳定性和可靠性等。  相似文献   
32.
本文概废水中蕴含着大量能量,如何高效地回收利用这些能量对于满足世界能源需求,降低废水处理成本,提高污水处理的可持续性具有重要意义。微生物燃料电池(MFC)是近年来发展起来的一种从废水的有机污染物中提取能量的新型生物技术,有望实现废水处理的可持续性发展。然而,目前MFC技术离实际应用还有很长的距离。MFC系统的扩大化问题是阻碍该技术实际应用的关键。本文详细讨论了MFC扩大化过程中的主要问题和挑战,并提出了未来的发展方向。MFC与其他技术结合可以实现较高的出水水质或获得高商业价值的化学品,然而该方面的研究才刚刚起步,要实现其实际应用还需要解决许多问题,包括如何提高生产效率,提高经济可行性,提升系统的稳定性和可靠性等。  相似文献   
33.
In 2010, the Association for the Advancement of Sustainability in Higher Education released, “Sustainability curriculum in higher education: A call to action,” encouraging infusion of sustainability topics into universities' teaching and research. Since then, academic programs and research related to social, economic, and environmental sustainability have enriched university curricula. An exploratory study was conducted to determine the position and engagements of academic libraries and information science schools in their contributions to scholarly sustainability activities and curricular initiatives. This article presents the results of the study which reveals a number of engagements by library professionals in the areas of sustainability, such as increasing open access to research, building sustainability-related collections and research guides, and incorporating sustainability content into information literacy. While academic libraries and information science schools are engaged in a broad spectrum of initiatives that support their institutions' sustainability research and curricular functions, this study indicates that such activities require a more targeted approach.  相似文献   
34.
Many adjectives are used in the context of transforming government including making it more open, transparent, participative, agile, responsive and so forth. Most, if not all, of these adjectives are either in themselves public values or reflect one or more underlying public values. This paper examines the relationship between information and communications technology (ICT), transformative government and such public values and proposes a framework for further research. A study of the literature on public values is used to develop a typology of public sector values likely to be affected by ICT. This impact is examined for a number of these values. For others hypotheses about the impact of ICT on other values are then posited. It is argued that ICTs can and do have transformational impacts on public values, though not always for the better, concludes that values are a potential powerful lens for considering such impacts and sets out a programme of research into these relationships.  相似文献   
35.
The open source software (OSS) movement thrives on innovation and volunteer effort of developers. Scholars have expressed widespread concern about the sustainability of the OSS movement due to high levels of volunteerism. In this paper, we address a central challenge to the sustainability of OSS-developers’ acceptance of monetary rewards. We strive to explain why some OSS developers accept monetary rewards and others do not. Viewed through the theoretical lens of the private-collective innovation model (0395 and 0400), this allows us to describe when developers will accept private financial rewards. Our main research objective is to clearly map the web of relationships between causal antecedents, and developers’ acceptance behavior. Using a unique dataset that combines survey and behavioral measures, we find that – (a) intention to accept monetary rewards mediates the impact of motivational elements on developers’ acceptance of monetary rewards; (b) intrinsic and extrinsic motivations positively affect their intention to accept monetary rewards, community motivation negatively impacts intention and ideological motivation does not affect the intention to accept rewards and (c) these effects are obtained even after inclusion of several control variables. The theoretical and managerial implications of our work are described.  相似文献   
36.
企业是经济人和道德人的统一体,其经营行为可以从经济和道德角度来评价。关于企业道德与企业经营业绩的关系有以下四种观点:双赢的观点、许可经营的观点、适度利润的观点和综合的观点。现代社会对企业的要求越来越高,企业必须提高其道德水平。因此,综合的观点是企业应该择优采纳的观点。  相似文献   
37.
本文从持续发展的研究历史及其内涵入手,对农业持续发展中的城乡协调发展、乡镇企业发展、农业科技进步、劳动者的科技素质、土地资源保护和减轻环境负担等问题进行了分析,以期在当前的新形势下,这几个问题能引起人们的重视。  相似文献   
38.
This paper explores how an aid-funded Ph.D.-programme in mathematics education instituted in some Southern African Development Community countries measures up to issues related to research capacity development projects. The research capacity development programme is described and reflected against mutual benefit, relevance, sustainability and prioritization of the location of project funding expenditure—some of the constructs in the discourse on research capacity development initiatives. It is found that the benefits of the programme are indeed mutual; the outcomes regarding relevance and sustainability are more uncertain and the location of expenditure of the funding is not overtly in favour of the donor country.  相似文献   
39.
Hazel Johnson  Alan Thomas 《Compare》2007,37(4):447-462
A recent study carried out by European and African organizations into the potential for electronic distance training (EDT) on sustainability in African local governments concluded that EDT was both ‘useful and feasible’. This article reflects on some of the theoretical and practical implications of that study. It focuses on the connection between learning and sustainability and how EDT programmes might be designed and promoted. The paper argues that, while resource issues and poor access to Information and Communication Technologies (ICTs) create considerable constraints and point to the need for policies to improve access, in general the most important factors for successful capacity building relate to the design of learning programmes that take account of the work contexts and skill and capability requirements of those targeted as learners. ‘Useful’ and ‘feasible’ depend on (i) how work‐based and work‐related learning processes are understood and (ii) the conditions to promote learning within African local government.  相似文献   
40.
Abstract

From the discussion in parts one and two there are two main points that emerge. The first is that it is difficult to identify from outdoor education literature a philosophical framework on which practice is based. Secondly, the body of outdoor education literature attaches more importance to learning outcomes relating to personal and social education than environmental education. The purpose of part three is to offer a philosophical framework and use it to consider the relationship between outdoor education, environmental education and the related concept of sustainability education. The paper starts out by looking at the development of western thought and how it has promoted the concept of epistemological dualism's. The paper then presents an alternative framework of epistemological diversity including experiential, presentational, propositional and practical ways of knowing that has particular relevance for environmental education and sustainability education. Although the prime focus of this paper is environmental education it also deals explicitly with a philosophical framework which includes experiential learning. Consequently, it has relevance to other claims made of outdoor education in particular personal and social education.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号