全文获取类型
收费全文 | 552篇 |
免费 | 41篇 |
国内免费 | 13篇 |
专业分类
安全科学 | 74篇 |
废物处理 | 12篇 |
环保管理 | 173篇 |
综合类 | 173篇 |
基础理论 | 29篇 |
环境理论 | 2篇 |
污染及防治 | 17篇 |
评价与监测 | 11篇 |
社会与环境 | 108篇 |
灾害及防治 | 7篇 |
出版年
2024年 | 1篇 |
2023年 | 12篇 |
2022年 | 19篇 |
2021年 | 22篇 |
2020年 | 27篇 |
2019年 | 16篇 |
2018年 | 23篇 |
2017年 | 24篇 |
2016年 | 25篇 |
2015年 | 18篇 |
2014年 | 25篇 |
2013年 | 35篇 |
2012年 | 37篇 |
2011年 | 44篇 |
2010年 | 29篇 |
2009年 | 36篇 |
2008年 | 25篇 |
2007年 | 39篇 |
2006年 | 23篇 |
2005年 | 24篇 |
2004年 | 20篇 |
2003年 | 20篇 |
2002年 | 6篇 |
2001年 | 15篇 |
2000年 | 11篇 |
1999年 | 5篇 |
1998年 | 6篇 |
1997年 | 8篇 |
1996年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有606条查询结果,搜索用时 15 毫秒
181.
Urine diversion (UD) has great potential to contribute to sustainably managing wastewater by separating urine at the source and recovering nutrients for reuse in agriculture. While factors enabling the UD technology in Sweden are thought to involve policies supporting nutrient recovery/reuse, on closer inspection, the variable success of UD systems has revealed that critical factors for success also relate to human-centred issues of social organisation, participation and incorporation of social knowledges of a variety of stakeholders into the decision-making process in which new technologies are trialled and adopted. Through the analytical lens of strategic niche management, we consider how early experimentation in UD has involved user participation and whether internal processes of learning, networking and visioning have been consciously considered and to what effect. As niche experiments are enabled/disabled not only by informal institutions such as values and social norms but also formal regulatory institutions, we have concurrently analysed the broader environment in which policies and institutions influence, to varying degrees, the uptake of UD. 相似文献
182.
李文 《中国人口.资源与环境》2002,12(1):27-31
本文将分析中国的人力资源条件对劳动生产率和科技创新能力的制约以及在国际性的人才争夺中所处的被动地位 ,提出发展教育和科技、更新观念和体制 ,是提升综合国力、实现可持续发展的重要途径。 相似文献
183.
184.
It is thought that young homing pigeons are able to use information acquired en route for their initial homeward orientation. However, the cues involved and mechanisms utilised are under discussion. Blocking light-dependent route-specific information during the first leg of an outward journey detour, together with analysis of pigeons that were raised under different loft conditions, allowed us to correctly evaluate the functioning of this mechanism and, more generally, the navigational map of birds. Pigeons from the same stock were raised and kept in two different lofts. The birds in the experimental groups were transported to the release sites via detours, and light-dependent information was denied during the first half of the outward journey (no compass information was available). Control birds were transported by the most direct route and had access to all available information. In general, the results showed that the low-loft birds preferred to use magnetic compass cues, whereas the high-loft birds preferred to use navigational map cues to collect information of the first part of the outward journey. The impairments observed in the homing performances of the experimental groups highlight the reliability of information collected inside the map area. Relevant to an understanding of the route-reversal mechanism was the evidence that this mechanism is able to function in the absence of compass information (birds raised in a wind-exposed loft show a detour effect). In systems where directional information could be provided by multiple sources, processing and extracting accurate course trajectories through a common mechanism may prove more efficient and reliable. 相似文献
185.
186.
随着人们环保意识的逐渐增强,航空业所造成的环境和噪声污染已经越来越成为令人关注的重大问题。从5个方面介绍了发达国家航空业发展循环经济的经验,指出我国作为发展中国家,要正视与发达国家的差距,借鉴国外先进经验,转变观念、大胆创新,大力发展循环经济,开辟我国航空业的新纪元。 相似文献
187.
《消防法》创新及其价值的几点思考 总被引:1,自引:1,他引:0
刘方飞 《防灾科技学院学报》2009,11(4):132-135
消防安全历来是治国安邦的一件大事,是民族繁荣昌盛的重要保障。论文主要从新修订《消防法》的创新、价值、存在之不足以及执行等四个方面,阐述修订《消防法》的重要意义。 相似文献
188.
189.
锅炉除尘技术很多,近年来麻石水膜式除尘器得到了广泛的应用,同时麻石水膜除尘器技术也不断得到进步,从技术方案创新和工艺改进方面都取得了很大的成绩,值得我们去总结和探讨。 相似文献
190.
韩国《环境政策基本法》研究 总被引:1,自引:0,他引:1
现行韩国《环境政策基本法》明确了可持续发展、环境权等基本理念,强化环境行政的综合调整机能,确立以事前预防为中心的环境政策,并随着时代发展要求及时进行多次修改,为最终实现其立法目的提供了制度保障。韩国环境基本法的成功经验,对我国《环境保护法》的修改具有一定借鉴价值。 相似文献