全文获取类型
收费全文 | 333篇 |
免费 | 4篇 |
专业分类
安全科学 | 10篇 |
废物处理 | 11篇 |
环保管理 | 39篇 |
综合类 | 163篇 |
基础理论 | 51篇 |
污染及防治 | 41篇 |
评价与监测 | 13篇 |
社会与环境 | 7篇 |
灾害及防治 | 2篇 |
出版年
2020年 | 4篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 7篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 9篇 |
2013年 | 11篇 |
2012年 | 6篇 |
2011年 | 11篇 |
2010年 | 8篇 |
2009年 | 9篇 |
2008年 | 8篇 |
2007年 | 7篇 |
2006年 | 7篇 |
2005年 | 5篇 |
2003年 | 6篇 |
2002年 | 7篇 |
1998年 | 5篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1994年 | 11篇 |
1993年 | 9篇 |
1992年 | 4篇 |
1991年 | 6篇 |
1990年 | 8篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1985年 | 5篇 |
1978年 | 5篇 |
1976年 | 5篇 |
1974年 | 4篇 |
1973年 | 4篇 |
1972年 | 5篇 |
1971年 | 3篇 |
1970年 | 7篇 |
1969年 | 3篇 |
1965年 | 4篇 |
1964年 | 5篇 |
1963年 | 3篇 |
1962年 | 4篇 |
1961年 | 4篇 |
1960年 | 5篇 |
1959年 | 5篇 |
1957年 | 7篇 |
1956年 | 4篇 |
1955年 | 9篇 |
1954年 | 4篇 |
1952年 | 3篇 |
1934年 | 4篇 |
排序方式: 共有337条查询结果,搜索用时 515 毫秒
91.
Many current audit programs are very good at determining the compliance issues at a site, but are less successful in developing long-term compliance solutions. One method for addressing these issues is the use of root cause analysis techniques. These techniques allow the facility to identify and focus on permanent solutions to compliance issues. The authors note the following: Conducting a root cause analysis is not a substantial burden on the audit team or the facility. Most information is already collected during the audit, but is not being used. Looking at the overview pattern of the root cause analysis can provide a picture of the maturity of your audit program. Pareto charts are excellent methods to convey the results of your analysis. They show both the trends of analysis and help highlight the most significant root causes. 相似文献
92.
The US Environmental Protection Agency recently completed two regulatory negotiation demonstrations. These demonstrations suggest that the current EPA rule-making process could be improved through the introduction of face-to-face negotiation at the earliest stages of rulemaking. In the demonstrations, EPA (1) relied on a consensus building process to forestall litigation after the promulgation of the final rule; (2) Used a nonpartisan facilitator to convene the negotiations; (3) Defined criteria to determine which parties should be represented in the negotiation. From the perspective of participants, the negotiating consensus version of a draft regulation is a successful alternative to the traditional rulemaking process. It is still too soon to say negotiated rulemaking significantly reduces the likelihood of ligitation. The results of the demonstration indicate that it is possible for either an agency employee or a neutral outsider to facilitate the sessions. A successful negotiation also requires top level agency support as well as the confidence of the environmental community. The single most important outcome of the negotiations was that the participants developed a greater understanding of the interests of the other parties. The demonstrations also suggest possible changes in future regulatory negotiations. 相似文献
93.
Barry Gerhart 《组织行为杂志》2005,26(1):79-97
The dispositional approach to job attitudes has played an important role in refocusing attention in organizational behavior on person factors, in addition to situational factors, as determinants of job attitudes and behaviors. I focus on what have been suggested as policy implications of research on dispositions, in particular, research on affective dispositions. My reading of the evidence suggests that affective dispositional factors may be useful in employee selection, and I identify questions that need to be resolved for this case to be stronger. On the other hand, I find little in the way of logic or evidence to support the claim that dispositions constrain the success of situational interventions designed to improve employee attitudes (or behaviors). Consistent with recent developments in the personality literature and with arguments made by Gerhart and Davis‐Blake and Pfeffer in the organizational behavior literature, I show that within‐person consistency in attitudes and behaviors can coexist with mean level changes in attitudes and behaviors induced by situational changes in the workplace. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
94.
95.
Brian Buchanan Zachary M. Easton Rebecca Schneider M. Todd Walter 《Journal of the American Water Resources Association》2012,48(1):43-60
Buchanan, Brian, Zachary M. Easton, Rebecca Schneider, and M. Todd Walter, 2011. Incorporating Variable Source Area Hydrology Into a Spatially Distributed Direct Runoff Model. Journal of the American Water Resources Association (JAWRA) 48(1): 43‐60. DOI: 10.1111/j.1752‐1688.2011.00594.x Abstract: Few hydrologic models simulate both variable source area (VSA) hydrology, and runoff‐routing at high enough spatial resolutions to capture fine‐scale hydrologic pathways connecting VSA to the stream network. This paper describes a geographic information system‐based operational model that simulates the spatio‐temporal dynamics of VSA runoff generation and distributed runoff‐routing, including through complex artificial drainage networks. The model combines the Natural Resource Conservation Service’s Curve Number (CN) equation for estimating storm runoff with the topographic index concept for predicting the locations of VSA and a runoff‐routing algorithm into a new spatially distributed direct hydrograph (SDDH) model (SDDH‐VSA). Using a small agricultural watershed in central New York, SDDH‐VSA results were compared to those from a SDDH model using the traditional land use assumptions for the CN (SDDH‐CN). The SDDH‐VSA model generally agreed better with observed discharge than the SDDH‐CN model (average, Nash‐Sutcliffe efficiency of 0.69 vs. 0.58, respectively) and resulted in more realistic spatial patterns of runoff‐generating areas. The SDDH approach did not correctly capture the timing of runoff from small storms in dry periods. Despite this type of limitation, SDDH‐VSA extends the applicability of the SDDH technique to VSA conditions, providing a basis for new tools to help identify critical management areas and assess water quality risks due to landscape alterations. 相似文献
96.
Kölliker R Bassin S Schneider D Widmer F Fuhrer J 《Environmental pollution (Barking, Essex : 1987)》2008,152(2):380-386
The genetic composition and diversity of Plantago lanceolata L. populations were analysed using amplified fragment length polymorphism (AFLP) as well as simple sequence repeat (SSR) markers to test for differences in an old semi-natural grassland after five years of treatment with ambient or elevated ozone (O3) using a free-air fumigation system. Genetic diversity in populations exposed to elevated O3 was slightly higher than in populations sampled from control plots. This effect was significant for AFLP-based measures of diversity and for SSR markers based on observed heterozygosity. Also, a small but significant difference in genetic composition between O3 treatments was detected by analysis of molecular variance and redundancy analysis. The results show that micro-evolutionary processes could take place in response to long-term elevated O3 exposure in highly diverse populations of outbreeding plant species. 相似文献
97.
Coupled human and natural systems 总被引:18,自引:0,他引:18
Liu J Dietz T Carpenter SR Folke C Alberti M Redman CL Schneider SH Ostrom E Pell AN Lubchenco J Taylor WW Ouyang Z Deadman P Kratz T Provencher W 《Ambio》2007,36(8):639-649
Humans have continuously interacted with natural systems, resulting in the formation and development of coupled human and natural systems (CHANS). Recent studies reveal the complexity of organizational, spatial, and temporal couplings of CHANS. These couplings have evolved from direct to more indirect interactions, from adjacent to more distant linkages, from local to global scales, and from simple to complex patterns and processes. Untangling complexities, such as reciprocal effects and emergent properties, can lead to novel scientific discoveries and is essential to developing effective policies for ecological and socioeconomic sustainability. Opportunities for truly integrating various disciplines are emerging to address fundamental questions about CHANS and meet society's unprecedented challenges. 相似文献
98.
99.
100.
/ Protected area management is increasingly important throughout the world, particularly in less developed countries and arid regions. The Middle East, includingJordan, has important and unique resources due to its varied topography and climate. In Jordan, the protected areas are privately, rather than publicly, managed, and this provides for a unique and somewhat challenging management effort. The purpose of this paper is to review the establishment and administration of Jordan's protected areas with particular emphasis on the challenges of multiple administrative and legislative layers, departmental working relationships, and a paucity of funding. Interviews with government and nongovernmental experts in Jordan, coupled with a review of pertinent academic and planning literature, served as the information base for this study. Despite new legislative and administrative initiatives, results reveal important and continuing challenges for Jordan. Recommendations include completion of protected area inventories, government wide institutional strengthening, partnering with organizations and the public, as well as legislative reexamination. 相似文献