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21.
废印刷电路板的静电分选实验研究 总被引:1,自引:0,他引:1
金属与非金属材料的分离是回收利用废印刷电路板的关键环节。对废印刷电路板物料的静电分选进行了实验研究。实验以电压、辊筒转速、电晕电极与辊筒之间的距离、静电极位置、电晕电极位置、电晕电极数量等为考察因素,研究各因素对电选效果的影响规律。结果表明,影响金属与非金属材料分离的主要因素是电压、辊筒转速和电晕电极与辊筒之间的距离,对于-0.9 0.45mm的破碎物料,当电压为24kV,辊筒转速为15Hz(54.6r/min),电晕电极与辊筒之间的距离为5.2cm时,得到最大静电分选综合效率67.37%。 相似文献
22.
Jia He Cun-Kuan Bao Ting-Fei Shu Xiao-Xue Yun Dahe Jiang Lex BrwonAuthor vitae 《Environmental Impact Assessment Review》2011,31(6):549-560
Sustainable development or sustainability has been highlighted as an essential principle in urban master planning, with increasing recognition that uncontrollable urbanization may well give rise to various issues such as overexploitation of natural resources, ecosystem destruction, environmental pollution and large-scale climate change. Thus, it is deemed necessary to modify the existing urban and regional administrative system so as to cope with the challenges urban planning is being confronted with and realize the purpose of urban sustainability. This paper contributed to proposing a mechanism which helps to make urban planning with full consideration of issues with respect to sustainable development. We suggested that the integration of urban planning, SEA and ecological planning be a multi-win strategy to offset deficiency of each mentioned political tool being individually applied. We also proposed a framework where SEA and ecological planning are fully incorporated into urban planning, which forms a two-way constraint mechanism to ascertain environmental quality of urban planning, although in practice, planning and SEA processes may conditionally be unified. Moreover, as shown in the case study, the integration of the three political tools may be constrained due to slow changes in the contextual factors, in particular the political and cultural dimensions. Currently within the context of China, there may be three major elements which facilitate integration of the three political tools, which are (1) regulatory requirement of PEIA on urban planning, (2) the promotion or strong administrative support from government on eco-district building, and (3) the willingness of urban planners to collaborate with SEA experts or ecologists. 相似文献
23.
During the last few years in the Netherlands an integrated environmental policy has been developed. Solving environmental problems by means of effective and efficient solutions requires that the entire environmental cycle be considered in order to take all relevant compartments and aspects into account. Four different phases can be identified during the treatment of an environmental problem by management: recognition, formulation, solution, and control.Some qualitative and quantitative aspects of the information demand of environmental policy are explored. Special attention is given to the consequences of the integral approach in environmental policy in terms of information requirements. The process of information supply starts with an analysis of the demand. Subsequently data from the environmental cycle have to be selected, aggregated, and presented adequately. Further, integrated environmental policy puts increased demands on the associative power of environmental information systems. 相似文献
24.
In this paper we analyze the concept of interactions between policy instruments addressing environmental, energy and climate
change issues. Although discussion on such policies has been taking place for almost two decades, their interactions are not
so sufficiently explored. Initially, we refer to literature on various types of interactions and we classify them. Furthermore,
we construct a qualitative method that can assist policymakers in selecting an optimal policy mix. This method breaks down
into numerous components, the areas where different policies interact, and facilitates the unveiling of potential overlaps
and complementarities. These areas consist of categories as measure identification, objectives, scope, market arrangements,
market flexibility, financing, technological parameters, timing, compliance parameters and institutional setup. In addition,
it renders the possibility of combining different options and design elements of policies. Furthermore, a list of various
criteria serves as an assessment tool for interactions, where a weighing factor and uncertainty parameters have been added,
in order to produce an aggregate indicator of the ex-ante analysis of the policy mix selected. Through this method, we present
a complete framework of discernment of diverse forms of environmental policy instruments. 相似文献
25.
The objective of this article is to empirically analyse whether there is a relationship between the difficulties found in the integration process and the level of system integration achieved.A sample of 362 organisations registered, at least, to both ISO 9001:2000 and ISO 14001:2004, is examined. Structural equation modelling is applied to their responses to a mailed survey. Two different groups are studied depending on the number of management systems implemented: two systems for the first group and three for the second.The results demonstrate that organisations with three implemented management systems face difficulties in the integration process that affect the level of integration, while this relationship is not significant for those organisations with two management systems.This paper is one of the first studies focussing on integration difficulties and their effect on the level of integration achieved. 相似文献
26.
In this article, we examine how issues of scale affect the integration of recreation management with the management of other
natural resources on public lands. We present two theories used to address scale issues in ecology and explore how they can
improve the two most widely applied recreation-planning frameworks. The theory of patch dynamics and hierarchy theory are
applied to the recreation opportunity spectrum (ROS) and the limits of acceptable change (LAC) recreation-planning frameworks.
These frameworks have been widely adopted internationally, and improving their ability to integrate with other aspects of
natural resource management has significant social and conservation implications. We propose that incorporating ecologic criteria
and scale concepts into these recreation-planning frameworks will improve the foundation for integrated land management by
resolving issues of incongruent boundaries, mismatched scales, and multiple-scale analysis. Specifically, we argue that whereas
the spatially explicit process of the ROS facilitates integrated decision making, its lack of ecologic criteria, broad extent,
and large patch size decrease its usefulness for integration at finer scales. The LAC provides explicit considerations for
weighing competing values, but measurement of recreation disturbances within an LAC analysis is often done at too fine a grain
and at too narrow an extent for integration with other recreation and resource concerns. We suggest that planners should perform
analysis at multiple scales when making management decisions that involve trade-offs among competing values. The United States
Forest Service is used as an example to discuss how resource-management agencies can improve this integration. 相似文献
27.
Ching-Ho Chen Ray-Shyan Wu Wei-Lin Liu Wen-Ray Su Yu-Min Chang 《Environmental management》2009,43(1):166-188
Some countries, including Taiwan, have adopted strategic environmental assessment (SEA) to assess and modify proposed policies,
plans, and programs (PPPs) in the planning phase for pursuing sustainable development. However, there were only some sketchy
steps focusing on policy assessment in the system of Taiwan. This study aims to develop a methodology for SEA in Taiwan to
enhance the effectiveness associated with PPPs. The proposed methodology comprises an SEA procedure involving PPP management
and assessment in various phases, a sustainable assessment framework, and an SEA management system. The SEA procedure is devised
based on the theoretical considerations by systems thinking and the regulative requirements in Taiwan. The positive and negative
impacts on ecology, society, and economy are simultaneously considered in the planning (including policy generation and evaluation),
implementation, and control phases of the procedure. This study used the analytic hierarchy process, Delphi technique, and
systems analysis to develop a sustainable assessment framework. An SEA management system was built based on geographic information
system software to process spatial, attribute, and satellite image data during the assessment procedure. The proposed methodology
was applied in the SEA of golf course installation policy in 2001 as a case study, which was the first SEA in Taiwan. Most
of the 82 existing golf courses in 2001 were installed on slope lands and caused a serious ecological impact. Assessment results
indicated that 15 future golf courses installed on marginal lands (including buffer zones, remedied lands, and wastelands)
were acceptable because the comprehensive environmental (ecological, social, and economic) assessment value was better based
on environmental characteristics and management regulations of Taiwan. The SEA procedure in the planning phase for this policy
was completed but the implementation phase of this policy was not begun because the related legislation procedure could not
be arranged due to a few senators’ resistance. A self-review of the control phase was carried out in 2006 using this methodology.
Installation permits for 12 courses on slope lands were terminated after 2001 and then 27 future courses could be installed
on marginal lands. The assessment value of this policy using the data on ecological, social, and economic conditions from
2006 was higher than that using the data from 2001. The analytical results illustrate that the proposed methodology can be
used to effectively and efficiently assist the related authorities for SEA. 相似文献
28.
柯成 《中国环境管理干部学院学报》2014,(3):36-39
河北省的环境角色定位在于对外实现环境的自主性,对内实现环境的恢复和可持续性。而这一定位的难题是环境与经济如何兼得,具体来说就是河北省环境与自身经济、与京津发展、与一体化如何协调。破解经济与环境的博弈,河北省需要把握住自身的主体性,进而实现环境的自主性,规划一体化下的产业格局,促进产业结构的转型,发展低碳经济,最终实现发展模式的更新,而这一定位的最终实现则需要法制的落实和保障。 相似文献
29.
The case is made in this paper for early and integrative public participation in planning decisions concerning proposals major
development in the zone. This is perhaps easy to subscribe to in theory but much more difficult in practice. Currently the
extent and timing of public involvement in such decisions varies widely. A key benefit is the legitimacy that public participation
provides to the planning process and, perhaps as a result, a variety of public involvement methodologies have emerged. Important
considerations include which sections of the public to involve and at what stage in the decision-making process to involve
them. The multidisciplinary nature of coastla zone issues will tend to engage a wide variety of stakeholder groups who in
turn will influence the topics for discussion. A major port expansion proposal in the UK is used to illustrate a range of
ways in which the public can be involved. The case study also highlights that public participation is an uncertain science,
and to be successful can require skilled personnel and significant resources. The papper concludes that more guidance for
developers, some standardisation of public involvement, training for facilitatiors and a more responsible stance from some
environmental pressure groups would be advantageous. The complexity of coastal decision-making, tensions between science and
policy, and the inter-dependency of coastal activities mutually reinforce the view that inclusive participation is an important
issue for all coastal communities. 相似文献
30.