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Dr Diana G. Day 《The Environmentalist》1993,13(3):211-220
Summary The development products of environmental research lag behind in Australia. The conventional technology transfer model may not apply where environmental research, especially in the social sciences, is still seen as marginal to society. Pragmatic planning is needed for strategic security in times of trouble ahead. Cultural alignment with technological advance allows seduction by laboratories, white gladiatorial coats and expensive equipment imparting high credibility. A correctness for research futures disallows more radical pathways by the use of profit watchers, waste watch committees, technocrats and masculinist political views.A new protocol for environmental research and development calls for less complacency, scrutiny of political and military investment in nuclear futures, greater public policy analysis of issues such as pesticides in Australia's cotton industry, more attention to natural systems thresholds, radical review of social mores, more flexible management systems and closer links between strategic land use and environmental planning.She currently works for the New South Wales Department of Water Resources as a Senior Executive Officer. She has published widely on environmental policy analysis and water planning, and is a Director of Australia's National Land and Water Resources Research and Development Corporation. 相似文献
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Louis A. Heifrich Mark Zimmerman Diana L. Weigmann 《Journal of the American Water Resources Association》1995,31(2):307-316
ABSTRACT: Filtering efficiency of the fathead minnow (Pimephales promelas), gizzard shad (Dorosoma cepedianum), carp (Cyprinus carpio), and a freshwater mussel (Elliptio coinpianata) was measured in field and laboratory trials to assess the ability of each species to control phytoplankton and suspended solid densities. All fish species tested were ineffective filterers and generally increased, rather than suppressed, algal and suspended solid concentrations. Filtering efficiencies of fish varied between -354 and 84 percent, depending on the size, shape, abundance, palatability, composition, and resistance to digestion of the particles. Because of poor filtering abilities, unpredictable feeding habits, and sensitivity to stress, the fish species examined are not effective biological controls in waste lagoons. In contrast, the freshwater mussel Elliptio was a highly effective control organism, averaging 66 percent filtering efficiency over a wide size range of algal and suspended particles. Filtration efficiency was positively correlated with mussel density. Elliptio was efficient at filtering small particles, which are particularly difficult to remove. Mean filtration rates ranged from 53 to 134 ml/mussel/h depending on the algal species consumed and algal densities (range 50–180,000 cells/ml) and 3 mg/L/mussel/h on suspended solids (range 14 to 112 mg/L). Water clarification was facilitated by both direct consumption and pseudofeces deposition. Elliptio and probably other mussel species can effectively control algae and suspended solids in wastewater lagoons and eutrophic lakes, if environmental conditions, especially dissolved oxygen levels, are suitable (>5 mg/L) for their survival. 相似文献
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Diana Valiela Paul H. Whitfield 《Journal of the American Water Resources Association》1989,25(1):63-69
ABSTRACT: Two sampling strategies designed to test for compliance with water quality objectives are examined. For objectives based on long-term mean requirements, fixed frequency sampling at frequent intervals is most advantageous regardless of the underlying distribution of the data. For objectives that are based on maximum allowable concentrations, effective sampling strategies increase the likelihood of detecting noncompliance. If data are highly autocorrelated or sharply seasonal in distribution, an exceedance-driven sampling strategy is more effective and efficient for detecting violations than fixed frequency sampling. However, data generated by exceedance-driven sampling provide biased estimates of mean and standard deviation. 相似文献
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Assessment of Flood Losses with Household Responses: Agent-Based Simulation in an Urban Catchment Area 总被引:1,自引:0,他引:1
Liang Emlyn Yang Jürgen Scheffran Diana Süsser Richard Dawson Yongqin David Chen 《Environmental Modeling and Assessment》2018,23(4):369-388
Densely populated coastal urban areas are often exposed to multiple hazards, in particular floods and storms. Flood defenses and other engineering measures contribute to the mitigation of flood hazards, but a holistic approach to flood risk management should consider other interventions from the human side, including warning information, adaptive behavior, people/property evacuation, and the multilateral relief in local communities. There are few simulation approaches to consider these factors, and these typically focus on collective human actions. This paper presents an agent-based model that simulates flood response preferences and actions taken within individual households to reduce flood losses. The model implements a human response framework in which agents assess different flood scenarios according to warning information and decide whether and how much they invest in response measures to reduce potential inundation damages. A case study has been carried out in the Ng Tung River basin, an urbanized watershed in northern Hong Kong. Adopting a digital elevation model (DEM) as the modeling environment and a building map of household locations in the case area, the model considers the characteristics of households and the flood response behavior of their occupants. We found that property value, warning information, and storm conditions all influence household losses, with downstream and high density areas being particularly vulnerable. Results further indicate (i) that a flood warning system, which provides timely, accurate, and broad coverage rainstorm warning, can reduce flood losses by 30–40%; and (ii) to reduce losses, it is more effective and cheaper to invest early in response measures than late actions. This dynamic agent-based modeling approach is an innovative attempt to quantify and model the role of human responses in flood loss assessments. The model is demonstrated being useful for analyzing household scale flood losses and responses and it has the potential to contribute to flood emergency planning resource allocation in pluvial flood incidents. 相似文献
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Balasubramani Sundararajan Rajendhiran Thamaraiselvi Moola Anil Kumar Diana Ranjitha Kumari Bollipo 《Environmental science and pollution research international》2017,24(17):15125-15133
Environmental Science and Pollution Research - It is believed that nanoemulsions were emerged as a promising candidate to improve the qualities of natural essential oil towards antimicrobial and... 相似文献
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