全文获取类型
收费全文 | 1120篇 |
免费 | 62篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 70篇 |
废物处理 | 1篇 |
环保管理 | 480篇 |
综合类 | 250篇 |
基础理论 | 147篇 |
环境理论 | 32篇 |
污染及防治 | 34篇 |
评价与监测 | 27篇 |
社会与环境 | 95篇 |
灾害及防治 | 50篇 |
出版年
2025年 | 10篇 |
2024年 | 54篇 |
2023年 | 74篇 |
2022年 | 53篇 |
2021年 | 83篇 |
2020年 | 84篇 |
2019年 | 89篇 |
2018年 | 69篇 |
2017年 | 91篇 |
2016年 | 103篇 |
2015年 | 66篇 |
2014年 | 33篇 |
2013年 | 72篇 |
2012年 | 55篇 |
2011年 | 43篇 |
2010年 | 27篇 |
2009年 | 40篇 |
2008年 | 24篇 |
2007年 | 21篇 |
2006年 | 28篇 |
2005年 | 16篇 |
2004年 | 12篇 |
2003年 | 10篇 |
2002年 | 6篇 |
2001年 | 4篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1993年 | 2篇 |
1990年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有1186条查询结果,搜索用时 15 毫秒
11.
Anita Nyapala Okoko; 《Disasters》2024,48(4):e12648
What are the consequential socio-spatial vulnerabilities of fragmentation in flood risk governance (FRG) functions in Tana River County, Kenya? To answer the question, this paper utilises social differentiation theory to establish types and consequences of such fragmentation. It applies theoretical patterns and processes of social differentiation to expose that FRG diversification could result in fragmentation of FRG functions. The study employs an interview strategy that focuses on governmental and non-governmental FRG actors. The results reveal that fragmented FRG functions in Tana River County was not an intentional policy decision, but rather a product of a transitional vacuum between policy promulgation and implementation. Furthermore, socio-spatial vulnerabilities differentiated by patterns and processes related to age, gender, disability, and ethnicity, for instance, are consequential outcomes of fragmented FRG functions in the Tana River floodplains. The study recommends implementation of the National Disaster Management Policy in Tana River County and institutionalisation of a specific FRG policy and legal framework. 相似文献
12.
Aleksy Kwilinski; 《Sustainable Development》2024,32(5):5797-5811
Digital technology, including advancements in artificial intelligence, the Internet of Things, and data analytics, has the potential to revolutionize tackling the problem of carbon dioxide emissions and achieving sustainable development. The paper aims at checking the nature of the impact of digital technology development on carbon dioxide reduction for the EU countries in 2013–2020. The study applies the following methods: entropy methods, panel-corrected standard error, and feasible generalized least squares. The digital technology development index enabled the classification of all the EU countries into two distinct groups: High Digital Technology Development and Moderate/Lower Digital Technology Development. The findings confirm that digital technology development has a significant impact on decreasing carbon dioxide emissions. In the first stage, the growth of digital technology causes a faster decrease in carbon dioxide emissions. However, beyond a certain threshold, the further improvement of digital technology results in diminishing marginal benefits of CO2 emissions reduction. Thus, the EU government should catalyze the extension of digital technologies among all sectors and levels. In addition, it requires enhancing digital literacy of the society and local authorities. 相似文献
13.
Michele M. Betsill;Rebecca L. Gruby;Jeffrey Blackwatters;Ash Enrici;Elodie Le Cornu;Xavier Basurto;Chad English;Charlotte Hudson;Leah Meth;Imani Fairweather-Morrison;Dana Okano;David Secord; 《Conservation biology》2024,38(4):e14272
Funding decisions influence where, how, and by whom conservation is pursued globally. In the context of growing calls for more participatory, Indigenous-led, and socially just conservation, we undertook the first empirical investigation of how philanthropic foundations working in marine conservation globally engage communities in grant-making decisions. We paid particular attention to whether and how community engagement practices reinforce or disrupt existing power dynamics. We conducted semistructured remote interviews with 46 individuals from 32 marine conservation foundations to identify how conservation foundations engage communities in setting their priorities and deciding which organizations and projects to fund. We found that community engagement in foundation decision-making was limited in practice. Eleven of the 32 foundations reported some form of community engagement in funding decisions. Two of these foundations empowered communities to shape funding priorities and projects through strong forms of engagement. Many engagement practices were one way, one time, or indirect and confined to certain points in decision-making processes. These weaker practices limited community input and reinforced unequal power relations, which may undermine the legitimacy, equity, and effectiveness of conservation efforts. We suggest that foundations aim for stronger forms of community engagement and reflect on how their grant-making practices affect power relations between foundations and communities. 相似文献
14.
Maren Aase 《Disasters》2020,44(4):666-686
Ideal notions of efficient aid are challenged continuously by realities on the ground in the wake of major disasters, such as dire needs, limited resources, and opportunism. This paper demonstrates how ‘relief lists’ can be productive entry points for a systematic inquiry into the pervasive politics of disaster assistance. Through an analysis of qualitative data collected during the five years after Cyclone Sidr struck Bangladesh on 15 November 2007, it examines how relief lists featured in both physical and phantom forms and then developed beyond their transparency-making aims, becoming elevated sites of struggle for post-disaster resources. Three list processes, selected to indicate the temporal, material, and spatial dynamics of relief encounters, are assessed in depth. Although recipients of cyclone relief appreciated its value, the paper argues that list politics also stimulated structures of vulnerability, including inequality. Gradually, relief, as governed after Sidr, also served to restore the differential vulnerability of the country's coastal poor. 相似文献
15.
16.
The steady-state assumption is a mainstay for the analysis of ecological systems with more than three or four states. However, it is well accepted in ecology that inputs to large systems come in pulses assumed to have a reasonably constant magnitude and frequency. Steady pulse inputs and the use of electro-chemical–mechanical control systems methodology enables limited short term dynamic responses of ecological systems of a scale often occurring in systems of potential engineering importance to be analyzed. This paper explores and presents a survey of multi-input–multi-output (MIMO) control systems analysis of ecosystem network models to better understand pulse frequency issues and further develop experimentally verifiable approaches to testing the MIMO concept. The analysis process is demonstrated using two network model exemplars. Two aspects of MIMO analyses appear relevant to understanding ecological systems: (1) Eigenvalue invariant analyses and singular value decomposition (SVD) analyses enable assessment of stability and relative strength of states. Eigenvalues reflect time constants and provide a check on experimentally determined system matrices. (2) Analysis of SVD versus frequency for each output indicates maximum pulse frequencies that allow system components to benefit from pulsing. As a group, MIMO analyses complement other analytical methods and provide a theoretical systems focus convenient for analyzing ecosystems from an engineering perspective. 相似文献
17.
18.
在现行计算方法中,通常采用不平衡推力法等传统方法设计抗滑桩.尽管国内外岩土工程技术人员通过研究使传统算法取得了较大的进展,但仍有许多不完善的地方,特别对于多排抗滑桩治理工程的设计计算,传统方法更难胜任,而采用有限元强度折减法则能解决这些问题.通过文中工程实例的设计计算可以看出,由于有限元强度折减法可以充分考虑桩—土之间... 相似文献
19.
对山东数字化台网荣成、烟台、莱阳、潍坊、苍山和大山台记录的垂直向P波初动半振幅、S波与P波的振幅比、P波、S波的卓越周期及振动持续时间比等参数进行了测算,并将之与同台址相应的模拟记录进行了对比,得出分析结果为:1 数字记录的速度震级较模拟记录的位移震级平均偏小0 11,数字记录的仿真震级与模拟记录的位移震级基本一致。2 数字记录的地震波参数与模拟记录一致性较好,没有明显差异。 相似文献
20.
Mark Duffield 《Disasters》2001,25(4):308-320
This article examines aid practice, that is, the public-private contractual networks that link donor governments, UN agencies, military establishments, NGOs, private companies and others, as a relation of global liberal governance. In order to fulfil this function, such networks embody what could be called the 'securitisation' of international assistance. Based upon ideas of human security and ameliorating the effects of poverty and vulnerability reduction, aid is now seen as playing a direct security role. Rather than being concerned with relations between states, the primary aim of this security paradigm is to modulate and change the behaviour of populations within them. In doing so, it is able to exploit the opportunities afforded by privatisation. At the same time, however, aid as security is confronted by its own particular problem of 'governing at a distance'; how can calculations made by leading states be transformed into actions at the global edge when a multitude of private and non-government implementors now intervene? The article concludes by examining the contribution of risk analysis to solving this problem and, especially, the development of new contractual regimes based around technical standardisation, benchmarking and performance auditing. Through such technologies, metropolitan states are learning how to manage the public-private networks of aid practice and, as a result, to govern the borderlands in new ways. 相似文献