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   437篇
  免费   34篇
  国内免费   11篇
安全科学   82篇
废物处理   1篇
环保管理   130篇
综合类   59篇
基础理论   86篇
污染及防治   32篇
评价与监测   13篇
社会与环境   36篇
灾害及防治   43篇
  2023年   6篇
  2022年   22篇
  2021年   29篇
  2020年   12篇
  2019年   24篇
  2018年   15篇
  2017年   23篇
  2016年   26篇
  2015年   24篇
  2014年   12篇
  2013年   51篇
  2012年   19篇
  2011年   16篇
  2010年   18篇
  2009年   27篇
  2008年   22篇
  2007年   21篇
  2006年   21篇
  2005年   12篇
  2004年   11篇
  2003年   9篇
  2002年   13篇
  2001年   7篇
  2000年   6篇
  1999年   8篇
  1998年   6篇
  1997年   6篇
  1996年   3篇
  1995年   1篇
  1994年   3篇
  1992年   4篇
  1988年   2篇
  1987年   1篇
  1985年   1篇
  1984年   1篇
排序方式: 共有482条查询结果,搜索用时 31 毫秒
21.
This article uses an analysis of the 'knowledge politics' of the Botany Community Participation and Review Committee (CPRC) to argue that the Habermasian ideals framing the CPRC are flawed. Habermasian communicative ethics centre upon the notion that fair, free and open forms of debate and communication ensure that no one form of reasoning and/or knowledge dominates others, and so commonly frame attempts to facilitate public participation in technical decision-making. However, in practice, Habermas' advocacy of 'the power of the better argument' (1984) supports adversarial debate and favours conventionally validated (i.e. scientific) forms of knowledge over others. This article identifies this departure from the vision underpinning communicative ethics with the routine deployment of a flawed conception of knowledge. This view - that knowledge is representational in character (that is, in effect, a 'mirror' onto the world) - marginalises lay contributions by rendering them of secondary status (i.e. that they are 'values'); diminishes them by insisting that they take conventional 'expert like' representational form; and supports 'deficit model' approaches (the belief that public antipathy results from knowledge 'deficits' resolvable by expert mediated enhancements in technical literacy). A non-representational epistemology is used to argue that effective participation must rather account for how knowledge is constructed by and through processes, including those of participation/deliberation, rather than existing autonomously of them. The implications of this emphasis on processes, rather than on the sources of and formal characteristics of knowledge, are examined both for public participation and for the dynamics of late-modernity more generally.  相似文献   
22.
基于发电企业设备自身的特点及工作人员对风险知识认知的局限性,有必要分析发电企业设备在运行、检修中潜在的风险.分析了设备风险知识与风险管理的关系,并以发电企业各类大型设备中应用最广泛的电动机为例,解决了电动机风险知识的表达及推理问题,为实现基于知识的设备风险管理提供了一种思路,对指导发电企业的设备日常维护、巡检以及状态监测、避免不必要的损失有着积极的意义.  相似文献   
23.
为了解影响救援人员实战心理的关键因素及其作用,采用走访、专家访谈和问卷调查的方法,对我国消防部队的人员组成、心理状况和实战心理进行调查和研究,重点分析消防队员掌握灾害知识和经验积累对实战中出现的恐惧、紧张、急躁等心理的影响。研究结果表明,灾害知识和救援经验的增加对大部分消防队员均能起到消除紧张情绪的作用,知识水平和实战中的紧张与恐惧心理呈现明显的负相关,且影响显著。笔者认为:将救援队伍和人员的灾害知识培训纳入日常工作,对提高救援部队的总体作战能力具有重要作用;对于高级指挥人员,理论知识水平的提高有助于更佳的指挥应对。  相似文献   
24.
Information on distribution and relative abundance of species is integral to sustainable management, especially if they are to be harvested for subsistence or commerce. In northern Australia, natural landscapes are vast, centers of population few, access is difficult, and Aboriginal resource centers and communities have limited funds and infrastructure. Consequently defining distribution and relative abundance by comprehensive ground survey is difficult and expensive. This highlights the need for simple, cheap, automated methodologies to predict the distribution of species in use, or having potential for use, in commercial enterprise. The technique applied here uses a Geographic Information System (GIS) to make predictions of probability of occurrence using an inductive modeling technique based on Bayes' theorem. The study area is in the Maningrida region, central Arnhem Land, in the Northern Territory, Australia. The species examined, Cycas arnhemica and Brachychiton diversifolius, are currently being 'wild harvested' in commercial trials, involving sale of decorative plants and use as carving wood, respectively. This study involved limited and relatively simple ground surveys requiring approximately 7 days of effort for each species. The overall model performance was evaluated using Cohen's kappa statistics. The predictive ability of the model for C. arnhemica was classified as moderate and for B. diversifolius as fair. The difference in model performance can be attributed to the pattern of distribution of these species. C. arnhemica tends to occur in a clumped distribution due to relatively short distance dispersal of its large seeds and vegetative growth from long-lived rhizomes, while B. diversifolius seeds are smaller and more widely dispersed across the landscape. The output from analysis predicts trends in species distribution that are consistent with independent on-site sampling for each species and therefore should prove useful in gauging the extent of resource availability. However, some caution needs to be applied as the models tend to over predict presence which is a function of distribution patterns and of other variables operating in the landscape such as fire histories which were not included in the model due to limited availability of data.  相似文献   
25.
Interpersonal trust is associated with a range of adaptive outcomes, including knowledge sharing. However, to date, our knowledge of antecedents and consequences of employees feeling trusted by supervisors in organizations remains limited. On the basis of a multisource, multiwave field study among 956 employees from 5 Norwegian organizations, we examined the predictive roles of perceived mastery climate and employee felt trust for employees' knowledge sharing. Drawing on the achievement goal theory, we develop and test a model to demonstrate that when employees perceive a mastery climate, they are more likely to feel trusted by their supervisors at both the individual and group levels. Moreover, the relationship between employees' perceptions of a mastery climate and supervisor‐rated knowledge sharing is mediated by perceptions of being trusted by the supervisor. Theoretical contributions and practical implications of our findings are discussed.  相似文献   
26.
Northern Ontario’s Ring of Fire/Wawangajing controversy constitutes a complex site of debate about the risks and benefits of mining in an area of major ecological significance that is also the ancestral territory of nine First Nation communities. This paper investigates the rhetorical alignments and divergences in public calls by Matawa First Nations tribal council and the Ontario Wildlands League for stronger environmental assessment of mining projects than that favoured by the Canadian government. Tracing the terminologies each group uses to describe the affected region and its inhabitants in its activist rhetoric about EA offers insight into the contingent, shifting ways in which wilderness advocacy and Indigenous justice discourses may speak together yet distinctly within contemporary environmental-natural resource disputes.  相似文献   
27.
Accurate discharge simulation is one of the most common objectives of hydrological modeling studies. However, a good simulation of discharge is not necessarily the result of a realistic simulation of hydrological processes within the catchment. We propose an evaluation framework that considers both discharge and water balance components as evaluation criteria for calibration of the Soil and Water Assessment Tool (SWAT). In this study, we integrated average annual values of surface runoff, groundwater flow, and evapotranspiration in the model evaluation procedure to constrain the selection of good model runs for the Little River Experimental Watershed in Georgia, United States. For evaluating water balance and discharge dynamics, the Nash‐Sutcliffe efficiency (NSE) and percent bias (PBIAS) were used. In addition, the ratio of root mean square error and standard deviation of measured data (RSR) was calculated for individual segments of the flow duration curve to identify the best model runs in terms of discharge magnitude. Our results indicate that good statistics for discharge do not guarantee realistic simulations of individual water balance components. Therefore, we recommend constraining the ranges of water balance components to achieve a more realistic simulation of the entire hydrological system, even if tradeoffs between good statistics for discharge simulations and reasonable amounts of the water balance components are unavoidable. Editor's note : This paper is part of the featured series on SWAT Applications for Emerging Hydrologic and Water Quality Challenges. See the February 2017 issue for the introduction and background to the series.  相似文献   
28.
Zaal Kikvidze  Gigi Tevzadze 《Ambio》2015,44(5):452-457
Reports of the damage from wolf attacks have increased considerably over the last decade in Georgia (in the Caucasus). We interviewed locals about this problem in two focal regions: the Lanchkhuti area (in western Georgia) and Kazbegi District (in eastern Georgia) where livestock numbers had increased by an order of magnitude owing to dramatic shifts in the local economies over the last decade. This coincided with expanding habitats for wolves (abandoned plantations, for example). We found that the perceived damage from wolves was positively correlated with a poor knowledge of wolf habits and inappropriate livestock husbandry practices. Our results suggest a loss of traditional knowledge contributes strongly to the wolf–human conflicts in Georgia. Restoring traditional, simple but good practices—such as protecting herds using shepherd dogs and introducing bulls into the herds—can help one solve this problem.

Electronic supplementary material

The online version of this article (doi:10.1007/s13280-014-0580-1) contains supplementary material, which is available to authorized users.  相似文献   
29.
技术创新是煤炭城市协调发展的重要支撑和根本保证,现有的煤炭城市技术创新存在着历史遗留及因其特性产生的固有障碍因素。知识管理是通过对知识资源的有效管理和利用,创造新价值和增强竞争优势的持续管理创新活动,它是破解煤炭城市技术创新路径闭锁的有力工具。  相似文献   
30.
Current debates about food-borne risks (GMOs and BSE) have not only deepened public concern about how food is produced on farms, processed in factories, and transported, stored and traded. More importantly, these debates have exposed a crisis related to central social issues, such as the role of science, politics and business corporations in the decision-making processes for determining which risks societies should, or are prepared to, assume. In this article, I discuss how cultural and social constructivist studies of environmental and health risks and Ulrich Beck's theory of world risk society can contribute to the analysis of how to deal with these conflicts. The criticism of quantitative methods of risk analysis has resulted in a certain idealization of the lay knowledge of risks as being intuitively more correct than the scientific one. One consequence of this polarization between expert and lay knowledge—idealizing the latter—is a disappointing vagueness when looking for alternatives on how to deal practically with risks that have important consequences. A key obstacle to the implementation of some of the suggestions presented by the critical risk analysis approach is that, for example, in the current global dynamics of food-borne risks we can find heterogeneous alliances for and against GMOs allying lay people and experts, as well as conventional and unconventional social actors, in a complicated manner, at the regional, national and international levels. Since a significant part of the analysis of manufactured risks focuses on the situation of highly industrialized countries, a more complex perspective of these lay and scientific alliances can be obtained from a more extensive study of the reactions surrounding GMOs and BSE in less-industrialized countries, such as Brazil. Copyright © 2002 John Wiley & Sons, Ltd.  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