全文获取类型
收费全文 | 5761篇 |
免费 | 28篇 |
国内免费 | 26篇 |
专业分类
安全科学 | 135篇 |
废物处理 | 315篇 |
环保管理 | 489篇 |
综合类 | 892篇 |
基础理论 | 1415篇 |
环境理论 | 2篇 |
污染及防治 | 1413篇 |
评价与监测 | 406篇 |
社会与环境 | 718篇 |
灾害及防治 | 30篇 |
出版年
2023年 | 44篇 |
2022年 | 77篇 |
2021年 | 64篇 |
2020年 | 33篇 |
2019年 | 50篇 |
2018年 | 76篇 |
2017年 | 96篇 |
2016年 | 116篇 |
2015年 | 72篇 |
2014年 | 151篇 |
2013年 | 451篇 |
2012年 | 181篇 |
2011年 | 256篇 |
2010年 | 222篇 |
2009年 | 228篇 |
2008年 | 264篇 |
2007年 | 260篇 |
2006年 | 253篇 |
2005年 | 215篇 |
2004年 | 195篇 |
2003年 | 231篇 |
2002年 | 183篇 |
2001年 | 263篇 |
2000年 | 167篇 |
1999年 | 102篇 |
1998年 | 46篇 |
1997年 | 60篇 |
1996年 | 57篇 |
1995年 | 67篇 |
1994年 | 70篇 |
1993年 | 61篇 |
1992年 | 59篇 |
1991年 | 65篇 |
1990年 | 70篇 |
1989年 | 55篇 |
1988年 | 59篇 |
1987年 | 55篇 |
1986年 | 60篇 |
1985年 | 47篇 |
1984年 | 47篇 |
1983年 | 48篇 |
1982年 | 49篇 |
1980年 | 33篇 |
1979年 | 32篇 |
1978年 | 33篇 |
1977年 | 28篇 |
1976年 | 28篇 |
1974年 | 32篇 |
1973年 | 32篇 |
1972年 | 29篇 |
排序方式: 共有5815条查询结果,搜索用时 15 毫秒
191.
N.C.G. Freeman T. Wainman P.J. Lioy A.H. Stern S.I. Shupack 《Journal of the Air & Waste Management Association (1995)》2013,63(8):604-605
Honorary Memberships are conferred by the Air Pollution Control Association on persons of widely recognized eminence in some part of the field of air pollution control or who have rendered especially meritorious service to the Association. Honorary Memberships were awarded this year to Dr. Leonard Greenburg and Mr. Milton Reizenstein, both past presidents of APCA. 相似文献
192.
F.L. Voelz S.I. Weinberg B.G. Gower 《Journal of the Air & Waste Management Association (1995)》2013,63(12):935-942
Gross average automotive exhaust emissions data collected by the Atlantic Richfield Clean Air Caravan during the summer of 1970 showed only slight geographical variations when the specific makes were ignored. When considering specific makes, significant differences were found on an average emissions basis. Vehicle population—emission distributions showed wide variations in the 50% population levels and in the percent of vehicles with emissions greater than specified values. Hydrocarbon (HC) and carbon monoxide (CO) data are given on a gross basis for the 1970, 1968-69, 1966-67, and pre-1966 model year group vehicles. Average HC and CO emissions and vehicle population-Idle emissions distribution curves are included for specific make vehicles in selected areas. 相似文献
193.
J.I. Accortt A. L Plumley J.R. Martin 《Journal of the Air & Waste Management Association (1995)》2013,63(10):966-969
This paper includes results from pilot plant studies and early field demonstration units and a discussion of the application of the limestone wet scrubbing process to a low sulfur syb-butuminous coal. This latter application required the development of a hybrid two stage scrubber to enable collection of the fine particulate matter as well as removal of a significant amount of the sulfur dioxide. 相似文献
194.
M.G. Morgan S.C. Morris 《Journal of the Air & Waste Management Association (1995)》2013,63(7):670-673
The results from the regional air quality analysis for the Four Corners Study are discussed in this paper. This study was one of five regional studies conducted for the National Commission on Air Quality. Potential regional air quality impacts were evaluated through the year 1995 for alternative energy scenarios under current and alternative regulatory policies. The alternative regulatory policies include emission fees, technology standards, emission ceilings, and prevention of significant deterioration class elimination. The alternatives were compared in terms of their impacts on regional visibility and on the ambient concentrations of SO2, SO4, and primary fine particulates. The fate of the pollutants was estimated. The alternative regulatory policies were quite different with respect to their control of SOX emissions and their impacts on regional visibility. Sources located outside of the study region were estimated to have a major impact on regional air quality within the study region. 相似文献
195.
Morris Katz 《Journal of the Air & Waste Management Association (1995)》2013,63(9):996-997
196.
Morris Katz Ph.D. D.Sc. 《Journal of the Air & Waste Management Association (1995)》2013,63(5):528-557
Atmospheric pollution attributed to increased combustion of fossil fuels has been implicated as a likely contributing factor in observed changes to forests in North America and Europe. Uncertainties surrounding the mechanisms and specific causes for these changes have prompted intensified interest in research on air pollution effects on forests. Major objectives of this review are 1) to provide a conceptual and historical perspective against which today's problems, concerns, and approaches can be evaluated; 2) to evaluate evidence of changes in growth and vitality of some tree species in today's forests; 3) to compare levels of principal atmospheric pollutants in Europe and the U.S.; 4) to describe mechanisms, pathways, and concentration thresholds for effects of principal pollutants on tree growth and physiology; 5) to summarize current evidence for the role of pollution in observed forest declines; and 6) to provide some perspectives on future research in this area. Evidence from laboratory and field research is examined to provide a basis for evaluating the role of atmospheric pollution in present and potential future forest responses. 相似文献
197.
198.
Experimental Characterization of Atmospheric Diffusion in Complex Terrain with Land-Sea Interactions
M. M. Mill´n E. Otamendi L. A. Alonso I. Ureta 《Journal of the Air & Waste Management Association (1995)》2013,63(7):807-811
The body of information presented in this paper is directed to scientists working in atmospheric dispersion research and model development. Two years of field measurements in the coastal area of Bilbao in northern Spain show that the diffusion behavior in this complex terrain can be classified into several well defined patterns, which correspond to certain meteorological conditions. The approach taken has been the systematic use of SO2 remote sensors (COSPEC) and ground level monitors in moving platforms which are used to follow and document the flow of the air mass. Results to date show that complex reentry cycles can occur and that synoptically different flows may be indistinguishable by wind sensors at ground level (affected by channeling), and yet result in totally different observed pollution levels by a fixed monitoring network (affected by topographical effects). These results are being used to parameterize the cause-effect relationships and guide the modeling efforts in this area of complex terrain. 相似文献
199.
Frederick W. Lipfert Samuel C. Morris Ronald E. Wyzga 《Journal of the Air & Waste Management Association (1995)》2013,63(8):1501-1513
ABSTRACT Time-series of daily mortality data from May 1992 to September 1995 for various portions of the seven-county Philadelphia, PA, metropolitan area were analyzed in relation to weather and a variety of ambient air quality parameters. The air quality data included measurements of size-classified PM, SO4 2-, and H+ that had been collected by the Harvard School of Public Health, as well as routine air pollution monitoring data. Because the various pollutants of interest were measured at different locations within the metropolitan area, it was necessary to test for spatial sensitivity by comparing results for different combinations of locations. Estimates are presented for single pollutants and for multiple-pollutant models, including gaseous pollutants and mutually exclusive components of PM (PM2.5 and coarse particles, SO4 2- and non-SO4 2- portions of total suspended particulate [TSP] and PM10), measured on the day of death and the previous day. We concluded that associations between air quality and mortality were not limited to data collected in the same part of the metropolitan area; that is, mortality for one part may be associated with air quality data from another, not necessarily neighboring, part. Significant associations were found for a wide variety of gaseous and particulate pollutants, especially for peak O3. Using joint regressions on peak O3 with various other pollutants, we found that the combined responses were insensitive to the specific other pollutant selected. We saw no systematic differences according to particle size or chemistry. In general, the associations between daily mortality and air pollution depended on the pollutant or the PM metric, the type of collection filter used, and the location of sampling. Although peak O3 seemed to exhibit the most consistent mortality responses, this finding should be confirmed by analyzing separate seasons and other time periods. 相似文献
200.
Chuen-Jinn Tsai Kai-Chung Cheng Shankar G. Aggarwal Tung-Sheng Shih I.-Fu Hung 《Journal of the Air & Waste Management Association (1995)》2013,63(10):1265-1272
Abstract A new triple filter system sampler/model is proposed for the precise and accurate simultaneous sampling and determination of gas- and aerosol-phase 2,4-toluene diisocyanate (TDI). The system consists of two front Teflon filters for sampling aerosol-phase TDI and a final coated glass fiber filter to collect gas-phase TDI. The aerosol-phase TDI is collected on the first Teflon filter, while the second Teflon filter is used to estimate gaseous TDI adsorbed by the first. According to the gas adsorption test of two Teflon filters in series, the TDI gas adsorption fraction of the two filters is almost the same. Results of the evaporation test using pure TDI aerosols collected on the Teflon filter show that significant evaporation of the compound does not occur during sampling. These two findings allow the use of a model to estimate accurate gasand aerosol-phase TDI concentrations. The comparison test with an annular denuder shows that the triple filter system can minimize the TDI sampling bias between the dual filter and the annular denuder systems. 相似文献