全文获取类型
收费全文 | 379篇 |
免费 | 77篇 |
国内免费 | 32篇 |
专业分类
安全科学 | 38篇 |
废物处理 | 6篇 |
环保管理 | 99篇 |
综合类 | 193篇 |
基础理论 | 38篇 |
污染及防治 | 39篇 |
评价与监测 | 34篇 |
社会与环境 | 28篇 |
灾害及防治 | 13篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 18篇 |
2021年 | 19篇 |
2020年 | 17篇 |
2019年 | 16篇 |
2018年 | 20篇 |
2017年 | 25篇 |
2016年 | 39篇 |
2015年 | 27篇 |
2014年 | 16篇 |
2013年 | 46篇 |
2012年 | 23篇 |
2011年 | 41篇 |
2010年 | 23篇 |
2009年 | 10篇 |
2008年 | 18篇 |
2007年 | 15篇 |
2006年 | 21篇 |
2005年 | 5篇 |
2004年 | 11篇 |
2003年 | 7篇 |
2002年 | 9篇 |
2001年 | 3篇 |
2000年 | 6篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1985年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1971年 | 2篇 |
排序方式: 共有488条查询结果,搜索用时 31 毫秒
381.
In recent years, commodity markets show a large amount of volatility and substantial price jumps, indicating an increasing economic scarcity in many cases. As this scarcity makes commodity procurement a critical issue for national economies, industry sectors and manufacturing companies, a number of criticality indices have been presented and utilized in science as well as in practice. These indices are mostly based on an aggregation of different key figures, both qualitative and quantitative. However, the weighting of the different factors is in most cases arbitrary or based on rough estimates. 相似文献
382.
The Alberta oil sands industry and the New South Wales coal industry both faced controversies related to their cumulative impacts. In an attempt to generate hypotheses, we compared their attempts to maintain legitimacy, in its various aspects, for both their industries and the regulatory regimes that evolved as the controversies persisted. Both the existing literature and the two cases suggest that greater use of multi-sectoral stakeholder forums for the governance of cumulative impacts can bolster the legitimacy of both the industry and its regulatory regime, including those aspects handled through self-regulation. The cases suggested the additional hypotheses that (a) the importance of the decisions allocated to the multi-stakeholder regulatory forum affects legitimacy perceptions generally, and (b) the multi-stakeholder approach to regulation does little to bolster legitimacy when stakeholders include activists who are more interested in transnational issues than local cumulative impacts. 相似文献
383.
384.
通过对江苏油田西部新区试采初期不同施工环节中污染源、污染物的分析,针对各种污染物产生的环节,从管理和技术的角度,提出了试采初期实施清洁生产的思路和方法,并对探区的清洁生产长期规划提出了可行性建议。 相似文献
385.
386.
Due to rapid industrialization, with high population density and constraints of land, it is expected that level of risks arising from the hazardous industries will increase in India in the coming decades. However, 30 years after the Bhopal accident (1984), except a few discrete regulations, there is as yet no integrated system for assessing and managing risks arising out of these hazardous industries in India. The gravity of aspects related to the management of industrial risk still remains crucially important. In particular, there is no standard guideline on risk analysis methodology, acceptability or tolerability criteria, nor is there an accident database or a risk reduction strategy for the areas where risk levels are already high. On top of this, there are technical and legislative gaps in the institutional framework to implement any of the above mentioned issues. With the backdrop of the Bhopal gas tragedy, the objective of this paper is therefore to evaluate the effectiveness of a comprehensive risk assessment framework for the emerging economy of India, in order to control and/or to reduce the risk level that exists. In this context, regulations and policies pertaining to industrial risk assessment were reviewed. 相似文献
387.
388.
就"五水共治"规划中所涉及的复杂性问题,围绕"五水"间的协同性关系,明确县级"五水共治"规划的地位与作用,深化"五水共治"中的联动关系,从控制总量减少流域污染、改善生态降低洪水灾害、优化绿地功能减轻内涝、提高植被覆盖率保障山区型饮用水安全、动员社会节约水资源等主要途径,阐述了循环经济、滞洪湿地公共空间带、城市下凹式绿地等一系列相关技术手段,为编制县域"五水共治"总体规划提供基本思路、技术指导和支持。 相似文献
389.
390.