全文获取类型
收费全文 | 4050篇 |
免费 | 290篇 |
国内免费 | 183篇 |
专业分类
安全科学 | 1177篇 |
废物处理 | 25篇 |
环保管理 | 213篇 |
综合类 | 913篇 |
基础理论 | 247篇 |
环境理论 | 2篇 |
污染及防治 | 92篇 |
评价与监测 | 55篇 |
社会与环境 | 167篇 |
灾害及防治 | 1632篇 |
出版年
2024年 | 3篇 |
2023年 | 43篇 |
2022年 | 95篇 |
2021年 | 114篇 |
2020年 | 94篇 |
2019年 | 99篇 |
2018年 | 78篇 |
2017年 | 141篇 |
2016年 | 114篇 |
2015年 | 183篇 |
2014年 | 120篇 |
2013年 | 148篇 |
2012年 | 291篇 |
2011年 | 271篇 |
2010年 | 190篇 |
2009年 | 211篇 |
2008年 | 138篇 |
2007年 | 247篇 |
2006年 | 269篇 |
2005年 | 204篇 |
2004年 | 157篇 |
2003年 | 150篇 |
2002年 | 159篇 |
2001年 | 145篇 |
2000年 | 148篇 |
1999年 | 114篇 |
1998年 | 96篇 |
1997年 | 93篇 |
1996年 | 90篇 |
1995年 | 80篇 |
1994年 | 61篇 |
1993年 | 66篇 |
1992年 | 49篇 |
1991年 | 25篇 |
1990年 | 6篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1973年 | 1篇 |
1971年 | 2篇 |
排序方式: 共有4523条查询结果,搜索用时 15 毫秒
61.
Taylor AJ 《Disasters》1983,7(1):37-40
This paper defines the various levels within government, the voluntary agencies and the community which might benefit from training and makes suggestions as to where the emphasis should be placed. It points out that training programmes should be designed to meet the expressed needs of a particular group of trainees as well as be related to the current or potential disaster situation. 相似文献
62.
Hodler TW 《Disasters》1982,6(1):44-49
A survey was conducted of individuals residing directly in the path of the tornado that hit Kalamazoo, Michigan, on 13th May 1980. The residents' tornado preparedness and response were examined in an effort to evaluate the city's emergency warning system. The system was adequate for people on the east side of the city and lacking for west side residents. Other factors pertaining to the storm event and human response were also evaluated. 相似文献
63.
用伴随方法对毒气泄漏事件进行危害评估 总被引:3,自引:1,他引:3
由于自然、人为等因素造成的有毒气体泄漏事件随时威胁着人们的生命安全。对于这类突发事故进行危害评估 ,在应急救援中 ,可以给决策者提供参考 ,使之采取有效措施 ,最大限度地降低事故危害程度 ,减少事故恶果及引起的恐慌。由于毒气泄漏位置事先无法确定 ,如果用常规方法进行逐点评估 ,将面临着巨大的计算量而难以进行。笔者发展了一种伴随方法 ,对风险函数的表达式进行等价变形 ,通过求解伴随方程 ,可以一次求得任意位置的毒气泄漏的风险值 ,大大降低计算量和工作量。此法在化学工厂和仓库设置 ,煤气网铺设和监测点选取 ,城市应急中心设置等多种安全规划中均有重要价值 ,为快速危害评估 ,降低化学事故危害提供了有力的研究工具和实用方法。 相似文献
64.
Major mining companies have recently embraced the sustainable development paradigm, in seeking to improve their competitiveness and increase shareholder returns. Successful mine closure is one important element of this process. Improved performance in this area is essential if surrounding communities are to see mining companies as responsible corporate and social partners.
In Indonesia, the new approach has coincided with the development of specific mine closure legislation. To facilitate the legislation, a consortium of mining companies joined to form the Industry Mine Closure Steering Committee. This Committee has lobbied the Government, actively negotiating to incorporate sustainable development ideals and practices into the new legislation. The Committee's aim has been to foster continued development of the mining industry, while taking account of variation in environmental, social and community conditions. In describing the process, this article seeks to provide guidance for the development of mine closure legislation in other nations. 相似文献
In Indonesia, the new approach has coincided with the development of specific mine closure legislation. To facilitate the legislation, a consortium of mining companies joined to form the Industry Mine Closure Steering Committee. This Committee has lobbied the Government, actively negotiating to incorporate sustainable development ideals and practices into the new legislation. The Committee's aim has been to foster continued development of the mining industry, while taking account of variation in environmental, social and community conditions. In describing the process, this article seeks to provide guidance for the development of mine closure legislation in other nations. 相似文献
65.
66.
青藏铁路的环境与安全 总被引:5,自引:0,他引:5
概述了青藏铁路线的环境特征,立足于青藏铁路及其周边环境构成一个相互影响的系统,重点分析了青藏高原环境对青藏铁路安全的危害和铁路建设与运营对环境构成的负面影响,并针对两个方面分别提出了相应的对策,对促进铁路安全保障和环境保护具有积极的意义。 相似文献
67.
2002年我国事故与灾害状况综述 总被引:3,自引:36,他引:3
本对我国2002年的安全生产事故及自然灾害情况进行了总结和评述。包括火灾(城乡火灾、森林火灾、草原火灾)、天气气候特征、农业自然灾害(干旱、洪涝、风雹、低温冻害)、海洋灾害(风暴潮、赤潮、海浪)、地质灾害(地震、泥石流、水土流失)等。 相似文献
68.
69.
70.
Open-cast lignite mining in the Lusatian mining district resulted in rehabilitated mine soils containing up to four organic matter types: (1) recent plant litter, (2) lignite deposited by mining activity, (3) carbonaceous ash particles deposited during amelioration of the lignite-containing parent substrate and (4) airborne carbonaceous particles deposited during contamination. The influence of lignite-derived carbon types on the organic matter development and their role in the soil carbon cycle was unknown. This paper presents the findings obtained during a six year project concerning the impact of lignite on soil organic matter composition and the biogeochemical functioning of the ecosystem. The organic matter development after rehabilitation was followed in a chronosequence of rehabilitated mine soils afforested in 1966, 1981 and 1987. A differentiation of the organic matter types and an evaluation of their role within the ecosystem was achieved by the use of 14C activity measurements, 13C CPMAS NMR spectroscopy and wet chemical analysis of plant litter compounds. The results showed that the amount and degree of decomposition of the recent organic matter derived from plant material of the 30 year old mine soil was similar to natural uncontaminated forest soil which suggests complete rehabilitation of the ecosystem. The decomposition and humification processes were not influenced by the presence of lignite. On the other hand it was shown that lignite, which was thought to be recalcitrant because of its chemical structure, was part of the carbon cycle in these soils. This demonstrates the need to elucidate further the stabilisation mechanisms of organic matter in soils. 相似文献