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排序方式: 共有3468条查询结果,搜索用时 15 毫秒
901.
Environmental Science and Pollution Research - This study investigated the changes of toxic compounds in coking wastewater with biological treatment (anaerobic reactor, anoxic reactor and...  相似文献   
902.
Environmental Science and Pollution Research - To evaluate the exposure of children to 14 perfluorinated compounds (PFCs) in a typical and representative industrial city, plasma samples from 476...  相似文献   
903.
Huang  Shengyun  Liu  Yannan  Yang  Fan  Wang  Yong  Yu  Ting  Ma  Dongling 《Environmental Chemistry Letters》2022,20(5):3005-3037
Environmental Chemistry Letters - Smart electronics and optoelectronics such as smart windows, touch panels and solar cells have profoundly changed our lives over the last decade, as a result of...  相似文献   
904.
Zhang  Tong  Wang  Ruke  Ma  Linzheng  Liu  Jing  Sun  Jifu  Wang  Bo 《Environmental Chemistry Letters》2022,20(5):2765-2771
Environmental Chemistry Letters - Catalytic dehydrogenative coupling of thiols with amines to produce sulfenamides and disulfides is an important reaction in the industry. Classical synthesis of...  相似文献   
905.
    
Greenwashing is an obstacle to the sustainable development of society, but the current governance of greenwashing is still a “common” governance, not a “collaborative” governance. Accordingly, this study focuses on the three stakeholders of greenwashing governance: company, media and government. Using a sample of listed companies that have published social responsibility reports from 2014 to 2018, this study analyzes the influence mechanism of media reports on greenwashing and discusses the moderating role of government regulation and mediating role of internal supervision. This study finds that internal supervision plays a hiding role in the process of media reports reducing greenwashing, but government regulation has a weakening effect on this hiding effect, showing a “common” governance. Simultaneously, this “common” governance is heterogeneous across time (i.e., corporate life cycle), space (i.e., spatial spillovers) and environment (i.e., the uncertainty of corporate external policies). However, when the cooperation between the government and the media is strengthened, the hiding behavior of the companies is suppressed and the performance of greenwashing governance is improved, so that “collaborative” governance is achieved. Against this backdrop, this study provides a macro-to-micro governance policy framework for corporate greenwashing from the four dimensions of strategy, systems, tools, and information to achieve “collaborative” governance. This study enriches the research on the corporate greenwashing governance and has practical implications for the government, media and other stakeholders.  相似文献   
906.
    
Various error sources exist in the specified relative permeability (kr) curves for numerical modeling of CO2/water core flooding process, including model selection, parameter estimation, and heterogeneity setting. In this study, we quantitatively investigate their effects on model predictions by a numerical sensitivity analysis. Numerical simulation results indicate: (1) The errors in residual gas saturation (Sgr) and residual liquid saturation (Slr) could significantly influence the estimation of the total volume (TPV) of injected CO2 when CO2/water displacement reaches a steady state. A change of Sgr or Slr by 0.1 can induce deviation in TPV up to 0.5 pore volume. (2) The change in Sgr could cause a bigger predictive deviation in local CO2 saturation ( S CO 2 ) than that in Slr. In the case of the same degree of change, the deviation of the former is almost twice as much as that of the latter. (3) The model predictions remain fairly consistent when utilizing either Corey's curve or Brooks–Corey curve, but become significantly different if changing to van Genuchten curve. In this case, the difference in TPV is greater than that caused by the errors in Sgr or Slr. The maximum deviation in the predicted local S CO 2 exceeds 0.3, influencing the analysis of CO2 local trapping behavior. Comparatively, the local S CO 2 buildup is only slight if van Genuchten curve is used, but obvious using Corey's curve. (4) kr heterogeneity only presents a small effect on the local S CO 2 and could be reasonably ignored compared to the effects of the heterogeneity in capillary pressure and permeability. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.  相似文献   
907.
    
Quantifying agricultural greenhouse gas (GHG) emissions is important for addressing global warming. In this regard, empirical models were constructed to evaluate the feasibility of using rice yield and canopy spectral properties for estimating paddy cumulative methane (CH4) emissions (CCE). A field experiment with shading treatments was conducted in 2017. A static chamber‐gas chromatography was used to measure CH4 fluxes during the growing season. Canopy hyperspectral reflectance was measured and then used to calculate the multispectral normalized difference vegetation index (NDVI), the ratio vegetation index (RVI), and the enhanced vegetation index (EVI). The results show that CH4 emissions were positively correlated to rice yield and biomass, indicating that higher biomass provided more substrates for CH4 generation. O2 availability maybe a main factor in the CCE differences under shading treatments. RVI and EVI showed a stronger positive relationship to CH4 emissions than NDVI. The empirical model including yield and EVI‐JS (EVI of jointing‐booting stage) as input variables performed better (adj‐R2 = 0.85, root mean square error [RMSE] = 12.26 kg ha−1) than the model that included only yield (adj‐R2 = 0.5, RMSE = 22.5 kg ha−1). This study suggests that it is feasible to apply remote sensing in paddy CH4 estimation, providing a referable attempt for future regional agricultural GHG emissions quantification. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.  相似文献   
908.
    
Water deposition of pollutants can be a good indicator of both air and water quality in a region of interest. In this paper, we study sulphate deposition change over time in a network of multiple monitoring stations in the Turkey Lakes Watershed in Sault Ste. Marie, Ontario, Canada. As there is generally substantial correlation among sulphate deposition observed over time and space, we incorporate temporally correlated multivariate random effects into Gamma regression models to account for the temporal dependence within each station and between‐station dependence in space. We applied our new approach to analyse monthly average sulphate depositions between 1983 and 2003. We found the observed increase of sulphate deposition between 1994 and 2003 was not significant, that is, annual trends in sulphate deposition had stabilized since 1994. Our analysis also quantified increasing sulphate deposition from upstream to downstream and its monthly fluctuations from higher in winter to lower in summer. Understanding of these sulphate deposition trends is of great policy relevance to environmental conservation. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   
909.
Community-based adaptation (CBA) seeks to address climate risks and socio-economic drivers of vulnerability simultaneously. However, as CBA activities appear very similar to standard development work, difficulties in identifying good practices arise. To clarify the role of CBA, this study elucidated how climate change can impact pre-existing development problems by investigating the experiences of four low-lying island communities in central Philippines. The islands currently suffer from frequent and extreme tidal flooding (following an earthquake-induced land subsidence in 2013, with a magnitude that is broadly similar to sea-level rise projections under a 1.5 to 2 °C global warming scenario), and endured a dry spell in 2016. The study also identified various publicly and privately initiated adaptation strategies, and evaluated their resilience against actual biophysical events. The study conducted focus group discussions with local leaders and in-depth interviews with government officials and residents in March 2016. Results show that tidal flooding impacted almost all aspects of daily life on the islands, while the dry spell completely depleted their limited water supplies. The strategies implemented by governments and NGOs (e.g., seawalls, rainwater collectors) were found to be inadequate in preventing tidal flooding and compensating for the dry spell. Also, communities used coral stones and plastic waste for raising the floors of their homes, which have an erosive effect on their capacity to adapt in the long term. Lack of community participation in publicly initiated projects and lack of adaptation funding for community-based strategies were the greatest obstacles to implementing climate-resilient solutions.  相似文献   
910.
    
The environmental certification acts as a sustainable practice for firms to improve their competitive advantage and its motivation has been widely discussed. However, existing researches ignore the important market driving force of green public procurement (GPP) as a policy tool. To fill this gap, this study, focusing on manufacturing firms in China and three typical environmental certifications, explores the relationship between GPP market pressure and firm's environmental certification practice based on institutional theory. Additionally, from a strategic perspective of green human resource management, this study unveils the influence mechanism of top management support in this relationship by using upper echelons theory. According to the empirical results, we find that GPP market pressure is positively associated with environmental certification practice, and top management support partially mediates this relationship. This study provides new insights into the explanation of firm's environmental certification practice, and provides practical implications for firm managers and government administrator.  相似文献   
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