全文获取类型
收费全文 | 8222篇 |
免费 | 398篇 |
国内免费 | 345篇 |
专业分类
安全科学 | 549篇 |
废物处理 | 78篇 |
环保管理 | 1622篇 |
综合类 | 3379篇 |
基础理论 | 555篇 |
环境理论 | 19篇 |
污染及防治 | 501篇 |
评价与监测 | 1892篇 |
社会与环境 | 248篇 |
灾害及防治 | 122篇 |
出版年
2024年 | 20篇 |
2023年 | 101篇 |
2022年 | 159篇 |
2021年 | 161篇 |
2020年 | 285篇 |
2019年 | 151篇 |
2018年 | 140篇 |
2017年 | 227篇 |
2016年 | 284篇 |
2015年 | 288篇 |
2014年 | 389篇 |
2013年 | 492篇 |
2012年 | 434篇 |
2011年 | 592篇 |
2010年 | 355篇 |
2009年 | 481篇 |
2008年 | 359篇 |
2007年 | 424篇 |
2006年 | 419篇 |
2005年 | 303篇 |
2004年 | 270篇 |
2003年 | 387篇 |
2002年 | 286篇 |
2001年 | 285篇 |
2000年 | 291篇 |
1999年 | 242篇 |
1998年 | 197篇 |
1997年 | 212篇 |
1996年 | 139篇 |
1995年 | 96篇 |
1994年 | 105篇 |
1993年 | 96篇 |
1992年 | 61篇 |
1991年 | 44篇 |
1990年 | 26篇 |
1989年 | 26篇 |
1988年 | 16篇 |
1987年 | 13篇 |
1986年 | 20篇 |
1985年 | 17篇 |
1984年 | 16篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1981年 | 7篇 |
1980年 | 10篇 |
1979年 | 3篇 |
1978年 | 13篇 |
1977年 | 6篇 |
1974年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有8965条查询结果,搜索用时 10 毫秒
11.
The challenges of sustainability in mining regions: The coal mining region of Santa Catarina, Brazil 总被引:1,自引:0,他引:1
Throughout history, mining communities have invariably found themselves striving for a good quality of life and a long‐term future. In the 21st century, problems of maintaining the economic vitality of mining regions are now compounded by concerns about the biophysical integrity of the local environment. In regions of the world where the economic viability of the resource is marginal and achieving a reasonable quality of life is a daily struggle, sustainable mining may seem to be a dubious prospect at best. Yet the twin imperatives of global political forces and burgeoning environmental concerns are requiring industry, governments and other interests to re‐conceptualize the way in which mining takes place in communities. Although mining itself may not be seen as an industry that contributes to the achievement of environmental objectives, it could — with careful planning — be used as a tool to foster a more sustainable and healthier community. This argument is considered in the context of the coal mining region of Santa Catarina, Brazil. 相似文献
12.
DENNIS D. COX LAWRENCE H. COX KATHERINE B. ENSOR 《Environmental and Ecological Statistics》1997,4(3):219-233
In this paper we summarize research issues for spatial environmental sampling stemming from a NISS/USEPA workshop held on 21-22 September 1994 at Chapel Hill, NC. 相似文献
13.
Sajjad Haider Rab Nawaz Muzammil Anjum Tahir Haneef Vipin Kumar Oad Salah Uddinkhan Rawaiz Khan Muhammad Aqif 《Frontiers of Environmental Science & Engineering》2023,17(9):111
14.
Catalytic water phase processes as an environmental application is a relatively novel subject with tremendous potential in the near future. This review of 120 references presents the wide scale of heterogeneous water phase applications studied mainly within past five years. Both oxidation and hydrogenation processes are included as well as TiO2 assisted photocatalysis. According to the references, heterogeneous catalysis is developing rapidly. New bimetallic catalysts and supports with higher surface area have improved catalytic efficiency in both oxidation and hydrogenation processes. It also seems that study on use of some waste materials such as red mud as catalyst is a very progressive field. On the whole, the chemical aspects are pretty well known, but the catalyst durability, and in many cases activity as well, has to be improved. 相似文献
15.
Environmental degradation by mud in tropical estuaries 总被引:3,自引:0,他引:3
In wet tropical countries, the intense rainfall and the lack of effective restrictions on human activities in the river catchment
leads to increased rates of soil erosion. This has increased the sediment loads many times over from the natural level. As
a result, estuarine and coastal waters are becoming increasingly muddy with associated losses for society in terms of increased
flooding and a degradation of the environment, the fisheries and the economic use of these waters. It is suggested that science-based
models be used to predict the fate of mud in estuaries and coastal waters when planning development in river catchments, particularly
in wet tropical countries. This would help integrate land and water management. Modelling technology is demonstrated by a
combination of field and model studies in four turbid tropical estuaries, namely the Fly River in Papua New Guinea, the Mekong
River in Vietnam, the Cimanuk River in Indonesia, and Hinchinbrook Channel in Australia. The final model is adapted to local
conditions and extensively uses data assimilation especially for open boundary conditions. There can be a feedback between
the hydrodynamics and the mud dynamics when the system silts; in wet tropical countries this can occur rapidly, sometimes
in only 30 years.
Electronic Publication 相似文献
16.
运用博弈论和利益相关理论构建的环境保护利益博弈分析框架,剖析长寿湖渔业养殖污染中的利益相关者及其博弈。通过分析政府、企业、渔民之间的六种利益博弈形式,得出结论:在渔场的各种利益博弈中,渔民的驱利行为导致了长寿湖的“公地悲剧”;守法成本高于违法成本是环境执法不力的主要原因;对渔场企业的环境管理职能缺乏有效的激励和约束;现行的政绩考核制度导致政府部门在环境保护行为中政治利益失衡;环保政策必须与相应经济利益挂钩,用激励机制把环保内化为自觉的经济行为;合理引导环境主体的群体行为,会使环保工作更加有效开展。 相似文献
17.
Comprehensive temperature monitoring in an in-vessel forced-aeration static-bed composting process 总被引:6,自引:0,他引:6
Masafumi Tateda Le Duc Trung Nguyen Viet Hung Michihiko Ike Masanori Fujita 《Journal of Material Cycles and Waste Management》2002,4(1):62-69
Comprehensive temperature monitoring was done in an in-vessel forced-aeration static-bed composting process using sewage sludge.
The three layers that divided the compost pile horizontally showed different temperature distributions. The temperature of
the top layer appeared not to be influenced by the ambient temperature. The temperature of the center area of the top layer
was taken to be the representative temperature for evaluating composting start-up performance. The temperature of the bottom
layer was strongly influenced by the ambient temperature, and the temperature of the center area of the bottom layer was taken
to be the representative temperature for pathogen control as it was the minimum temperature in the reactor. Composting start-up
performance was influenced by several factors when the ambient temperature was either below or above 20°C. When the ambient
temperature was below 20°C, the time taken to reach 65°C (T
65) was influenced by the temperature of inflowing air, but when the temperature was higher than 20°C, it was influenced by
the ratio of sewage sludge to seed compost (F/S). T
65 was least when F/S was 1–2.
Received: January 9, 2001 / Accepted: October 10, 2001 相似文献
18.
农村污染防治工作已迫在眉睫 总被引:1,自引:0,他引:1
针对目前农村经济发展过程中出现的主要环境问题,结合农村的实际情况,提出了解决农村环境污染问题的几项措施。并着重分析了规模化畜禽养殖业中的环境污染问题,提出了综合防治对策。 相似文献
19.
20.